CBSE Questions for Class 12 Engineering Chemistry Chemistry In Everyday Life Quiz 5 - MCQExams.com

The antioxidant which is used to prevent rancidity in foods is:
  • butylated hydroxyl anisole
  • sodium hydroxide
  • sodium carbonate
  • methylated hydroxyl anisole
Which of the following statements is false about a soap?
  • The soap solution in water is neutral that can be used to wash all kinds of fabrics.
  • Soap forms lather only in soft water.
  • Soap is a metallic salt of higher fatty acids.
  • Soap cannot be used in slightly acidic medium.
Which one of the following statements is incorrect about soaps?
  • Soaps are biodegradable
  • Soaps are sodium salts of higher fatty acids
  • Soaps are prepared from natural oils and fats
  • Soaps can be used in acidic solutions
Which of the following represent saponification reaction?
  • $$CH_3COOH+NaOH\xrightarrow {CaO} CH_4 + Na_2CO_3$$
  • $$CH_3COOH+C_2H_5OH\xrightarrow {H_2SO_4}CH_3COOC_2H_5+H_2O$$
  • $$2CH_3COOH+2Na\rightarrow CH_3COONa+H_2$$
  • $$CH_3COOC_2H_5+NaOH\rightarrow CH_3COONa+C_2H_5OH$$
Washing powders contain detergents in the range of (by mass):
  • $$10-15\%$$
  • $$15-30\%$$
  • $$50-60\%$$
  • $$40-50\%$$
Study the experimental set up shown below.
Which of the following statements is correct regarding the observations made, after the two visking tubes  P and Q were placed in dilute iodine solution for 10 minutes ?
[Key : Visking tube allows the molecules of iodine to pass through it.]
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  • Solution in visking tube P turns blue - black
  • Solution in visking tube Q turns blue - black
  • Solution in both the visking tubes P and Q turns blue - black
  • Solution in neither of the visking tubes turns blue - black
Water can be tested by :
  • smell
  • test
  • Hydrated $$CuSO_4$$
  • Anhydrous $$CoCl_3$$ which change the colour to pink
A by product of soap industry is:
  • sodium hydroxide
  • sodium palmitate
  • glycerol
  • both $$B$$ and $$C$$
Which of the following is not correctly matched?
  • Hard soaps-sodium salts of fatty acids
  • Soft soaps-potassium salts of fatty acids
  • Hydrophilic-water insoluble
  • None of these
Sodium sulphate is added to washing powders to ____________.
  • keep dirt suspended in water
  • keep washing powders dry
  • maintain alkalinity to remove dirt
  • produce whiteness in clothes
Sodium chloride is added to the solution after saponification to cause the :
  • hydrolysis of soap
  • precipitation of soap
  • sedimentation of soap
  • none of these
The long hydrocarbon chain in soap is water-repelling (hydrophobic), which is called:
  • polar tail
  • ring chain
  • non-polar tail
  • none of the above
The hydrophilic end of synthetic detergent is:
  • $$CH_3(CH_2)_{10}-CH_2-$$
  • $$-CH_3$$
  • $$-CH_2-CH_3$$
  • $$-COO^-Na^+$$
Detergents are sodium salts of a long chain:
  • benzene sulphonic acids
  • alkyl hydrogen sulphate
  • both $$A$$ and $$B$$
  • none of the above
Which of the following substance has bitter taste?
  • Milk
  • Amla
  • Soap solution
  • Salt solution
Which of the following compounds is a soap?
  • $$CH_3(CH_2)_{16}CONa$$
  • $$CH_3(CH_2)_{16}COONa$$
  • $$CH_3(CH_2)_{16}COOH$$
  • $$CH_3(CH_2)_{16}COOCH_3$$
A detergent is :
  • cleaning agent
  • drugs
  • soap
  • catalyst
Fats +NaOH $$\rightarrow $$ ___________ + Glycerol. 

One of the products formed in this reaction is :
  • Soap
  • Cloth
  • Paper
  • Wood
Which of the following reactions is called saponification?
  • $$CH_3COOCH_3+OH^-\rightarrow CH_3COO^-+CH_3OH$$
  • $$CH_3COO^-Na^+\xrightarrow {HCl}CH_3COOH+NaCl$$
  • $$CH_3COOH+CH_3CH_2OH\rightarrow CH_3COOH_2CH_3$$
Which element(s) can be used to demonstrate a beating heart experiment?
  • Mecury
  • Sodium
  • Galium
  • Germanium
Enzymes provide active sites for holding the substrate molecules through a variety of interactions like:
  • covalent bonding
  • dipole-dipole interaction
  • ionic bonding
  • hydrogen bonding
Which the following represents saponification reaction?
  • $$CH_3COONa+NaOH\xrightarrow {CaO}CH_4+Na_2CO_3$$
  • $$CH_3COOH+C_2H_5-OH\xrightarrow {H_2SO_4}CH_3COO C_2H_5+H_2O$$
  • $$2CH_3COOH+2Na\rightarrow 2CH_3COONa+H_2$$
  • $$CH_3COOC_2H_5+NaOH\rightarrow CH_3COONa+C_2H_5OH$$
________ is the additive used in transparent soaps.
  • Potassium bicarbonate
  • Stearic acid
  • Salicyclic acid
  • Glycerine
The soap can be hardened by :
  • adding sodium carbonate or sodium silicate during its manufacture
  • adding sodium chloride
  • adding potassium hydroxide
  • adding animal fat and coconut oil
The process of making soap by the hydrolysis of fats and oils with alkalis is called:
  • hydrolysis
  • saponification
  • esterification
  • none of the above
Sodium chloride is added to the solution after saponification to cause the:
  • hydrolysis of soap
  • precipitation of soap
  • sedimentation of soap
  • none of these
_________________are used to control body temperature during fever.
  • Antipyretics
  • Antiseptics
  • Analgesics
  • Antihistamines
What are used to control body temperature during fever?
  • Antipyretics
  • Analgesics
  • Antidiuretics
  • Antibiotic
Which of the following is used to control body temperature during fever:
  • Antihistamine
  • Antiseptics
  • Antipyretic
  • Antidiuretic
Enzymes provide active sites for holding the substrate molecules through a variety of interactions like:
  • ionic bonding
  • metallic bonding
  • hydrogen bonding
  • covalent bonding
Agonists can:
  • inhibit function of receptors
  • mimic natural chemical messengers
  • help transfer of message to receptors
  • inhibit the catalytic activity of the enzyme
Drugs that bind to the receptor sites and inhibit its natural function are called analgesics.
  • True
  • False
When drugs attach to allosteric sites on enzymes, the shapes of active sites radically are affected so that the substrate molecules cannot recognise the active sites.
  • True
  • False
Drugs that bind to the receptor site and inhibit its natural function are called _________________
  • Antagonists
  • Enzymes
  • Molecular targets
  • Agonists
Some drugs attach on the enzymes to sites other than active sites. These are called as______ 
  • Allosteric sites
  • Episteric sites
  • Inhibitor sites
  • Non-Inhibitor sites
Drugs that bind to the receptor sites and inhibit its natural function, are called:
  • antipyretics
  • analgesics
  • agonist
  • antagonist
The chemical substances which relieve the pain either completely or partially are called laxatives.
  • True
  • False
Which of the following are the chemical substances that decrease anxiety?
  • tranquilizers
  • hallucinogens
  • opiates
  • cocaine
Which of the following is used in the management of psychoses and neuroses?
  • Tranquilizers
  • Opiates
  • Hallucinogens
  • Cocaine
Tranquilizers can act as:
  • antiallergens
  • antihypertensives
  • antibiotics
  • muscle relaxants
Agonists cannot:
  • inhibit function of receptors
  • mimic natural chemical messengers
  • control body temperature during fever
  • relieve the pain
Examples of antipyretics are:
  • paracetamol
  • morphine
  • Barbituric acid
  • para-amino phenol
Histamine is responsible for the nasal congestion associated with common cold and allergic response to pollen.
  • True
  • False
Which of the following plays important role in controlling movement, motivation and cognition?
  • Noradrenaline
  • Dopamine
  • Amphetamine
  • Adrenaline
Which of the following increases blood pressure and heart beat?
  • Noradrenaline
  • Dopamine
  • Serotonin
  • Adrenaline
Examples of antacids are:
  • sodium hydroxide
  • sodium bicarbonate
  • magnesium hydroxide
  • urea
Urea is responsible for the nasal congestion associated with common cold and allergic response to pollen.
  • True
  • False
The chemical substances which neutralise the excess of acid generated in the stomach and maintain the normal pH value are called:
  • Analgesics
  • Antacids
  • Antidiarrheal
  • Antibiotics
Which of the following are artificial sweeteners?
  • Sodium benzoate
  • Saccharin
  • Galactose
  • Aspartame
An example of food preservative is:
  • Sodium benzoate
  • Adipic Acid
  • Calcium Benzoate
  • Alcohol
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