MCQExams
0:0:1
CBSE
JEE
NTSE
NEET
Practice
Homework
×
CBSE Questions for Class 12 Engineering Chemistry Chemistry In Everyday Life Quiz 4 - MCQExams.com
CBSE
Class 12 Engineering Chemistry
Chemistry In Everyday Life
Quiz 4
Which of the following will not enhance nutritional value of food?
Report Question
0%
Minerals
0%
Artificial sweeteners
0%
Vitamins
0%
Amino acids
Explanation
Artificial sweeteners enhance the taste but will not enhance the nutritional value. Whereas minerals, vitamins and amino acid will increase the nutritional value as they are the important constituents of nutrition.
Which of the following statements is not true about enzyme inhibitors?
Report Question
0%
Inhibit the catalytic activity of the enzyme.
0%
Prevent the binding of substrate.
0%
Generally, a strong covalent bond is formed between an inhibitor and an enzyme.
0%
Inhibitors can be competitive or non-competitive.
Explanation
Enzyme inhibitors bind reversibly and irreversibly.
They bind reversibly with non-covalent bond, whereas, they bind irreversibly with covalent bond where they change the key amino acid residues needed for enzymatic activity.
Hence, option C is correct.
Which of the following chemical can be added for sweetening of food items at cooking temperature and does not provide calories?
Report Question
0%
Sucrose
0%
Glucose
0%
Aspartame
0%
Sucralose
Explanation
Sucrose is common sugar.
Glucose is a simple sugar. Glucose is mainly made by plants and most algae during photosynthesis from water and carbon dioxide, using energy from sunlight.
Aspartame is unstable at cooking temperature and hence, it is used in cold drinks and soft drinks.
Sucralose is a trichloro derivative of sucrose which is stable at cooking temperature and does not provide calories.
Hence, option D is the right answer.
Which of the following are the uses of medicines?
Report Question
0%
Cure disease
0%
Maintain health
0%
Modify body characterisitics
0%
All of the above
Explanation
Medicines can be used to cure diseases, maintain health and modify body characteristics.
Hence option D is the correct answer.
Which of the following is not an antidepressant?
Report Question
0%
Iproniazid
0%
Phenelzine
0%
Equanil
0%
Salvarsan
Explanation
Antidepressants are a class of drugs that reduce symptoms of depressive disorders by correcting chemical imbalances of neurotransmitters in the brain.
Chemical imbalances may be responsible for changes in mood and behavior.
Examples: Iproniazid, Phenelzine and Equanil.
Salvarsan is antibiotic.
Which of the following statements are correct about barbiturates?
Report Question
0%
Hypnotics or sleep producing agents
0%
These are tranquilizers
0%
Non-narcotic analgesics
0%
Pain reducing without disturbing the nervous system
Explanation
Barbiturates are drugs that act as central nervous system depressants (tranquilizers) , and can therefore produce a wide spectrum of effects, from mild sedation to total anesthesia also leads to sleep.
Hence, options A and B are correct.
Which of the following compounds are administered as antacids?
Report Question
0%
Sodium carbonate
0%
Sodium hydrogen carbonate
0%
Aluminium carbonate
0%
Magnesium hydroxide
Explanation
Antacids are agents that neutralize the gastric acid and raise the
gastric pH, so are used to treat dyspepsia and are used as symptomatic
relief of peptic ulcer. Antacids in common use salts of magnesium,
aluminium and calcium, which are basic, but not enough to be caustic in the body. A and C are a little more basic, so only B and D are used generally.
The average molecular mass of drugs is approximately:
Report Question
0%
160-480 g/mol
0%
1600-4800 g/mol
0%
10-100 g/mol
0%
0.1-100 g/mol
Explanation
According to Lipinski's rule of 5, a small molecule drug should have its molecular mass less than 500 daltons i.e., 500 g/mol.
Amongst the following antihistamines, which are antacids?
Report Question
0%
Ranitidine
0%
Brompheniramine
0%
Terfenadine
0%
Cimetidine
Explanation
Antihistamines are drugs that inhibit the action of histamine in the
body by blocking the receptors of histamine. There are two types of
histamine receptors $$H_1$$ and $$H_2$$.
Ranitidine is in a group of drugs called histamine-2 blockers.
Ranitidine works by reducing the amount of acid your stomach produces.
Brompheniramine is an antihistamine that reduces the effects of natural
chemical histamine in the body. Histamine can produce symptoms of
sneezing, itching, watery eyes, and runny nose.It is used to treat runny nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.
Terfenadine is an antihistamine. Antihistamines prevent sneezing, runny
nose, itching and watering of the eyes, and other allergic symptoms.It is used to treat allergies, hives (urticaria), and other allergic inflammatory conditions.
Cimetidine is an antihistamine antihistamine used for treating and preventing heartburn from acid indigestion or sour stomach.
It may also be used to treat other conditions as determined by your
doctor.
So Ranitidine and Cimetidine are antihistamine antacids.
Hence, options A & D are correct.
Assertion: There is a scientific explanation for the feeling of depression.
Reason: In people who are depressed, the mood-regulating neurotransmitters fail to function normally, so that the signal is either depleted or disrupted before passing to the next nerve cell. In all depressions, it is likely that the transmission of serotonin is reduced or disrupted.
Choose the correct options.
Report Question
0%
Both Assertion and Reason are correct
0%
Assertion is correct but Reason is incorrect
0%
Both Assertion and Reason are incorrect
0%
Assertion is incorrect but reason is correct
Explanation
Neurotransmitters are chemicals that carry signals from one part of the brain to the next. There are many neurotransmitters, serving different purposes, however, three important ones that affect a person's mood are serotonin, noradrenaline and dopamine.
In normal brain function, neurotransmitters jump from one nerve cell to the next, with the signal being as strong in the second and subsequent cells as it was in the first. However, in people who are depressed, the mood-regulating neurotransmitters fail to function normally, so that the signal is either depleted or disrupted before passing to the next nerve cell.
In all depressions, it is likely that the transmission of serotonin is reduced or disrupted.
Hence, option A is correct.
Aspirin is pain relieving anti-inflamatory drug but can be used to prevent heart attack.
Report Question
0%
True
0%
False
Explanation
The given statement is true.
Aspirin is pain reliving antipyretic drug but can be used to prevent a heart attack. It prevents platelet coagulation. It has anti-blood clotting property.
Note: Aspirin is non narcotic analgesic, ani-inflammatory and antipyretic.
Hair shampoos belong to which class of synthetic detergent?
Report Question
0%
Anionic
0%
Cationic
0%
Neutral
0%
None of these
Explanation
Synthetic detergents used in hair shampoos, usually contain a modified ammonium ion as an active site, which produces a germicidal action. Example: dodecylaminehydrochloride $$(C_{12}H_{28}ClN)$$ and hexadecyltrimethylammonium bromide $$(CH_3(CH_2)_{15}N(CH_3)_3^+Br^-)$$.
How does the branching of hydrocarbon chain of synthetic detergents affect their biodegradability?
Report Question
0%
More branching leads to biodegradability
0%
More branching leads to non-biodegradability
0%
No effect
0%
None of these
Explanation
Detergents having highly branched hydrocarbon chains cause pollution in rivers. The reason being that side chains stop bacteria from attacking and breaking the chains.
Thus, lesser the branching more is the biodegradability i.e., detergents with long straight hydrocarbon chains are more easily degraded than those having branched hydrocarbon chains.
Since unbranched (i.e., straight) chains are more prone to attack by bacteria, therefore in most of the detergents used these days, the breaching is kept to be minimum so that the detergents become easily biodegradable.
Hence, option B is correct.
Which category of the synthetic detergents is used in toothpaste?
Report Question
0%
Anionic
0%
Cationic
0%
Neutral
0%
None of these
Explanation
Synthetic detergents are used in toothpaste. Usually, they contain either a sulfate $$(SO_4^{2-})$$ or
sulfonate
$$(SO_3^{2-})$$ head group (which are anions).
Example: Sodium lauryl ether sulfate $$(CH_3(CH_2)_{11}(OCH_2CH_2)_nOSO_3Na)$$.
Which site of an enzyme is called allosteric site?
Report Question
0%
which binds to the cell wall
0%
where drugs bind to an enzyme
0%
which is not the active site, where some drugs bind to an enzyme
0%
none of these
Explanation
The allosteric site is the site, which is not the active site, where some drugs bind to an enzyme. Due to this, the shape of the enzyme changes, it becomes difficult for the substrate to recognize the active site of the enzyme. This represents non-competitive inhibition.
Aspartame is unstable at cooking temperature. Where would you suggest aspartame to be used for sweetening?
Report Question
0%
Soft drinks
0%
Cold drinks
0%
Both of them
0%
None of these
Explanation
Aspartame is unstable at cooking temperature, hence it can be used in soft drinks and cold drinks for artificial sweetening.
What is the side product of soap industry?
Report Question
0%
Sodium Hydroxide
0%
Esters
0%
Ethanol
0%
Glycerol
Explanation
Soaps are prepared from vegetable oils and animal fats, containing tri-esters called triglycerides.
These triglycerides can be converted to soap by treating them with a strong base, which accelerates cleavage of the ester bond and releases the fatty acid salt and glycerol.
The attached image shows the reaction.
Option D is correct.
The bond formed between an enzyme and an inhibitor:
Report Question
0%
can be broken easily
0%
cannot be broken easily
0%
is a weak bond
0%
none of the above
Explanation
If the bond formed between an enzyme and an inhibitor is a strong covalent bond, it cannot be broken easily. Then the enzyme is blocked permanently and the body degrades the enzyme-inhibitor complex and synthesizes the new enzyme.
Select the appropriate option for the given statement.
Sodium salts of some acids are very useful as ______________.
Report Question
0%
Preservatives
0%
Decomposers
0%
Disinfectants
0%
Both A & B
Explanation
For example sodium benzoate, a sodium salt of benzoic acid, is used as a preservative.
Antagonistic drug displaces an agonist at that receptor it seemingly deactivates it thereby reversing the effect of the agonist.
Report Question
0%
True
0%
False
0%
Ambiguous
0%
None of these
The artificial sweetener, which is a derivative of sucrose, is:
Report Question
0%
stevia.
0%
saccharin.
0%
aspartame.
0%
sucrolose.
Explanation
Hence, sucrolose is correct answer.
Bathing soap is usually ______ and free from the unused alkali, while washing soap is usually _____ and also contains some residual alkali.
Report Question
0%
soft, soft
0%
hard, soft
0%
soft, hard
0%
None of these
Explanation
Depending on the nature of the alkali used in their production, soaps have distinct properties. Washing soaps are hard, sodium salts of fatty acids and they
contains residual alkali.
Whereas, bathing soaps are soft, potassium salts o
f fatty acids and they are free from residual alkali.
Assertion :
Chemical messenger gives a message to the cell without entering the cell
Reason :
Chemical messenger is received at the binding site of receptor proteins
Report Question
0%
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
0%
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
0%
Both Assertion and Reason are incorrect
0%
Assertion is correct but Reason is incorrect
0%
Assertion is incorrect but Reason is correct
0%
Answer required
Explanation
Chemical messenger is received at the binding site of receptor proteins and
gives the message to the cell without entering the cell. To accommodate the messenger, the shape of receptor changes. In the body,message between two neurons and that between neurons and muscles is communicated through certain chemicals called as chemical messengers.
Thus,
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Hence, the correct option is $$\text{A}$$
Assertion: Non-competitive inhibitor inhibits the catalytic activity of an enzyme by binding at the active site.
Reason: Non-competitive inhibitor changes the shape of the active site in such a way that substrate can't recognize it.
Report Question
0%
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
0%
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
0%
Both Assertion and Reason are incorrect.
0%
Assertion is correct but Reason is incorrect.
0%
Assertion is incorrect but Reason is correct.
0%
Assertion is partially correct but reason is incorrect
Assertion : Preservatives are added to food items
Reason : Preservatives inhibit the growth of microorganisms
Report Question
0%
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
0%
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
0%
Both Assertion and Reason are incorrect
0%
Assertion is correct but Reason is incorrect
0%
Assertion is incorrect but Reason is correct
Explanation
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Preservatives increase shelf life of food materials by inhibiting growth of micro organisms and that is the reason why they are added to food items.
Assertion : Receptors are crucial to body's communication process
Reason : Receptors are proteins
Report Question
0%
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
0%
Both Assertion and Reason are correct and Reason is NOT the correct explanation for Assertion
0%
Both Assertion and Reason are incorrect
0%
Assertion is correct but Reason is incorrect
0%
Assertion is incorrect but Reason is correct
0%
None of these
Explanation
Option (B) is correct.
Receptors are proteins that are crucial to body's communication process. They receives and responds to a neurotransmitter, or other substance. Majority of them are embedded in the cell membrane, in such a way their small part possessing active site projects out of the surface of the membrane and opens on the outer region of the cell membrane.
The principal functional group in aspirin is:
Report Question
0%
Phenyl
0%
-COOH
0%
Ester
0%
All
Explanation
Option (B) is correct.
The principal functional group in aspirin is $$-COOH$$
The common chemical name for aspirin is acetylsalicylic acid. Its systematic name is 2-(acetyloxy)benzoic acid. The chemical formula of aspirin is $$C_9H_8O_4$$
.
Aspirin is commonly used as a medicinal drug to relieve headaches, minor pains and fevers. It also helps prevents blooding clotting but it higher doses may cause ulcers in stomach and the gastrointestinal tract.
Assertion: All chemical added to food items are called food preservatives.
Reason: All the chemicals increase the nutritive value of the food.
Report Question
0%
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
0%
Both Assertion and Reason are correct but Reason is NOT the correct explanation for Assertion.
0%
Both Assertion and Reason are incorrect.
0%
Assertion is correct but Reason is incorrect.
0%
Assertion is incorrect but Reason is correct.
Explanation
Various chemicals are added to food. They are called food additives and are flavours and sweeteners, food colours (dyes), fat emulsifiers and stablising agents, flour improvers antistaling agents and bleaches, antioxidants, preservatives and nutritional supplements.
Thus, only few chemicals added to food items are called food preservatives.
and Only few chemicals increase the nutritive value of the food.
Hence, both Assertion and Reason are incorrect.
Assertion : Receptor proteins show selectivity for one chemical messenger over the other
Reason : Chemical messenger binds to the receptor site and inhibits is natural function
Report Question
0%
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
0%
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
0%
Both Assertion and Reason are incorrect
0%
Assertion is correct but Reason is incorrect
0%
Assertion is incorrect but Reason is correct
0%
Answer required
Explanation
D. Assertion is correct but Reason is incorrect.
Inhibitor
binds to the r
eceptor site and inhibits is natural function. Chemical messengers bind to the receptor site and convey the information to the interior of the cell.
What change will you observe if you test soap with litmus paper (red and blue)?
Report Question
0%
It will turn red litmus blue
0%
It will turn blue to red
0%
Red litmus paper won't change colour
0%
None of these
Explanation
Since, soaps are basic in nature, thus, it turns red litmus paper to blue. When blue litmus paper is dipped in soap solution, it remains blue.
Option A is correct.
Soaps are water soluble while detergents are water insoluble.
Report Question
0%
True
0%
False
Explanation
Soaps
are
water-soluble
sodium or potassium salts of fatty acids. Soaps are made from fats and oils, or their fatty acids, by treating them chemically with a strong alkali.
A
detergent
is a surfactant,
usually alkylbenzenesulfonates
, a family of compounds that are similar to soap
but are
more soluble
in hard water
, because the polar sulfonate
(of detergents) is less likely than the polar carboxyl (of soap) to bind to calcium and other ions found in hard water.
Option B is correct.
State True or False:
Statement : The polar end in soap is called hydrophilic end.
Report Question
0%
True
0%
False
Explanation
The soap molecule is very long. One end is polar (unequal sharing of electrons) and the other end is not (equal sharing of electrons). The polar end grabs onto a water molecule hence called hydrophilic. Hence the given statement is true.
The soap molecule has a
Report Question
0%
hydrophobic head and a hydrophilic tail
0%
hydrophobic head and a hydrophobic tail
0%
hydrophilic head and a hydrophobic tail
0%
hydrophilic head and a hydrophilic tail
Statement: Detergents give scum with hard water.
State whether the given statement is true or false.
Report Question
0%
True
0%
False
Explanation
Detergents are not soaps. Detergents work by coming in contact with a surface and reducing surface tension, with something known as a surfactant. Basically allowing the dirt to slide away. Detergents are synthetics. Soap is natural, like glycerine or tallow.But they are very active in hard water.
One reason why laundry detergents work better than soap is that they contain substances that soften the water. Hard water contains dissolved calcium $$Ca^{+2}$$ and magnesium $$Mg^{+2}$$ ions. These ions interfere with the action of soap by reacting with it to form a gray, slimy substance called curd or soap scum. Laundry detergents inhibit curd formation because they contain substances such as sodium carbonate $$(NaCO_{3})$$ that removes the Ca and Mg ions from the water. When sodium carbonate dissolves in water it separates to form Na ions and $$CO_{3}$$ ions. The dissolved $$CO_{3}$$ ions react with the Ca and Mg to form $$CaCO_{3}$$ and $$MgCO_{3}$$ which are solids and settle to the bottom of the washer. Hence given statement is false because it given scum even in soft water but not that much.
In the soap micelles
Report Question
0%
The ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster
0%
The ionic end of soap is on the interior of the cluster the carbon chain is out of the cluster.
0%
Both ionic end and carbon chain are in the interior of the cluster
0%
Both ionic end and carbon chain are on the exterior of the cluster
In all depressions, it is likely that the transmission of ________ is reduced.
Report Question
0%
serotonin
0%
brompheniramine
0%
terfenadine
0%
cimetidine
Explanation
Serotonin is reduced when human brain gets into depression. When operating properly, your nervous system has natural checks and balance in form of inhibitory and excitatory neurotransmitters.
Micelle formation take place when soap is added to water? Will a micelle be formed in other solvents like ethanol also?
Report Question
0%
True
0%
False
Explanation
Hint: A
hydrophobic and hydrophilic end of soap molecules responsible for the formation of Micelle
.
Correct Answer: $$B$$
Explanation for correct option :
Micelles are formed when soap is added to water. This is because the hydrocarbon chains of a soap molecule are hydrophobic and insoluble in water, but the ionic ends are hydrophilic and soluble in water. Micelles are an aggregate of soap molecules that arrange themselves in a spherical shape in the soap solution.
Micelles will not form in a solvent like ethanol, as the hydrocarbon chain of soap molecules is hydrophobic; hence, not be soluble in an organic solvent like ethanol.
Anionic surfactants are:
Report Question
0%
$$C_{15}H_{31}COONa$$
0%
0%
$$C_{18}H_{37}NH_3Cl$$
0%
all of the above
Explanation
The options A and B represent anionic surfactants. They are sodium salts of long chain carboxylic acids or sulphonic acids. The larger part of the molecules (hydrocarbon part) are anions. They are also effective in acidic solutions.
Use of chemicals for therapeutic effect is called :
Report Question
0%
medicine
0%
chemotherapy
0%
drug-target intereaction
0%
Photography
Explanation
Chemotherapy is a category of cancer treatment that uses the chemical substance. Especially one or more anti-cancer drugs that are given as a part of the standardized chemotherapy regimen.
Hence, the correct option is $$\text{B}$$
What are the substances which mimic the natural chemical messengers?
Report Question
0%
Antibiotics
0%
Antagonist
0%
Agonists
0%
Recepter
Explanation
Agonists are the chemicals that bind to a receptor and activates the receptor to produce a biological response whereas antagonists bind to the receptor site and inhibit the natural function of drugs.
Therefore, a substance that mimics the natural chemical messengers is called agonists
Hence, the correct option is $$\text{C}$$
The drug given during hypertension is?
Report Question
0%
Streptomycin
0%
Chloroxylenol
0%
Equanil
0%
Aspirin
Explanation
The drug given during hypertension is Equanil.
Equanil is an important tranquillizer used in depression and hypertension.
Cationic surfactants is/are:
Report Question
0%
$$C_{17}H_{35}COONa$$
0%
$$C_{17}H_{35}COOK$$
0%
$$C_{17}H_{35}SO_3Na$$
0%
$$C_{16}H_{33}N(CH_3)_3Cl$$
Explanation
Cationic surfactant is $$C_{16}H_{33}N(CH_3)_3Cl$$. In this, the larger part (hydrocarbon) of the molecule is cation $$C_{16}H_{33}N(CH_3)_3^+$$ .
Non-ionogenic surfactants are:
Report Question
0%
0%
$$C_{17}H_{35}COONa$$
0%
$$C_nH_{2n+1}(OCH_2CH_2)_x$$
0%
$$all\ the\ above$$
Explanation
Non ionic surfactants are $$C_nH_{2n+1}(OCH_2CH_2)_x$$. In them, the molecule is covalent and does not include cations and anions.
An antipyretic is:
Report Question
0%
Quinine
0%
Paracetamol
0%
Luminal
0%
Piperazine
Explanation
An antipyretic reduces the body temperature.
Paracetamol is also known as acetaminophen. Chemically it is named as N-acetyl-p-aminophenol (APAP). It is used to reduce the pain and fever. Thus, it is an antipyretic.
Aspirin is called:
Report Question
0%
pyretic
0%
antiseptic
0%
antibiotic
0%
antipyretic
Explanation
Aspirin
is a medication
often used to treat pain, fever
, and inflammation
It inhibits the synthesis
of chemicals known as prostaglandins which stimulate
inflammation in the tissue and cause pain.
These drugs are effective
in relieving skeletal pain such as that due to arthritis. These drugs
have many other effects such as reducing fever (antipyretic).
Paracetamol is a/an?
Report Question
0%
Antepyretic
0%
Aanalgesic
0%
Antimaralial
0%
Both 1 and 2
Detergents are prepared by the action of $${ H }_{ 2 }{ SO }_{ 4 }$$, followed by neutralization, by starting with:
Report Question
0%
cholesterol
0%
lauryl alcohol
0%
cyclohexanol
0%
p-nitrophenol
Explanation
Detergents are prepared by the action of $$H_2SO_4$$, followed by neutralization by starting with lauryl alcohol.
An example is $$NaLS$$ which is sodium lauryl sulphonate. Lauryl alcohol $$(C_{12}H_{26}O)$$ reacts with sulphuric acid followed by aq. $$NaOH$$ to form $$NaLS$$, $$CH_3(CH_2)_{10}OSO_3^-Na^+$$.
While studying saponification reaction, a student measures the temperature of the reaction mixture and also finds its nature using blue/red litmus paper. On the basis of his observations the correct conclusion would be:
Report Question
0%
the reaction is exothermic and the reaction mixture is acidic
0%
the reaction is endothermic and the reaction mixture is acidic
0%
the reaction is exothermic and the reaction mixture is neutral
0%
the reaction is exothermic and the reaction mixture is basic
0%
the reaction is endothermic and the reaction mixture is basic.
Explanation
To carry out saponification reaction, heat is supplied. Hence, the reaction is endothermic. Since excess NaOH is used, the reaction mixture is basic.
We need a 20% aqueous solution of sodium hydroxide for the study of saponification reaction. When we open the lid of the bottle containing
solid sodium hydroxide we observe it in which form?
Report Question
0%
Colourless transparent beads
0%
Small white beads
0%
White amorphous solid
0%
Fine white powder
0%
White pellets/ flakes
Explanation
Sodium hydroxide is generally available in the form of white pellets/ flakes. Note: Sodium hydroxide is highly hygroscopic. Hence, it should be prevented from moisture.
Tonic usually contains:
Report Question
0%
methanol
0%
quinine
0%
chloroform
0%
ether
Explanation
Tonic usually contains quinine and is sold as a carbonated beverage. It (quinine) was used as a prophylactic for malaria and is also mixed in gin. It has a bitter taste.
0:0:1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
0
Answered
0
Not Answered
0
Not Visited
Correct : 0
Incorrect : 0
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Practice Class 12 Engineering Chemistry Quiz Questions and Answers
<
>
Support mcqexams.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page
