MCQExams
0:0:1
CBSE
JEE
NTSE
NEET
Practice
Homework
×
CBSE Questions for Class 10 Chemistry Carbon And Its Compounds Quiz 5 - MCQExams.com
CBSE
Class 10 Chemistry
Carbon And Its Compounds
Quiz 5
In which of the following substances, carbon atoms are arranged in a regular tetrahedral structure?
Report Question
0%
Diamond
0%
Benzene
0%
Graphite
0%
Carbon black
Explanation
In diamond, carbon atoms are arranged in a regular tetrahedral structure. Each carbon atom is bonded to four other carbon atoms.
In benzene, six carbon atoms form a hexagon.
Graphite is made of hexagonal arrays of carbon atoms placed in layers one above the other. Carbon black also has a similar structure to graphite but the molecules are less orderly arranged.
Which of the following pair of carbon compounds will undergo combustion as well as addition reaction?
Report Question
0%
$$CH_4$$ and $$C_2H_6$$
0%
$$C_2H_5OH$$ and $$C_2H_6$$
0%
$$C_3H_8$$ and $$CH_4$$
0%
$$C_2H_2$$ and $$C_3H_6$$
Explanation
All organic compounds give a combustion reaction but only unsaturated hydrocarbons, like alkenes and alkynes, undergo an addition reaction.
A) $$CH_4$$ and $$CH_3-CH_3$$ both are saturated hydrocarbons.
B)
$$CH_3-CH_2-OH$$
and $$CH_3-CH_3$$ both are saturated hydrocarbons.
C)
$$CH_3-CH_2-CH_3 $$
and $$CH_4$$ both are saturated hydrocarbons.
D) $$CH\equiv CH$$ and $$CH_2=CH-CH_3$$ both are unsaturated hydrocarbons.
Hence, option D is correct.
Some elements show the property of existing in two or more distinct physical form which show different physical properties but same chemical properties. These distinct forms of an element are called :
Report Question
0%
isomers
0%
allotropes
0%
compounds
0%
isobars
Explanation
Allotropes of carbon have a different physical form but chemically they are similar, e.g., diamond and graphite are allotropes of carbon which are chemically carbon compounds but physically diamond is the hardest material known while graphite is soft material.
Hence, option $$B$$ is correct,
An unsaturated hydrocarbon :
Report Question
0%
contains only six carbon atoms.
0%
contains fewer hydrogen atoms than is needed for carbon to have its usual valency of four.
0%
Always contains equal number of carbon and hydrogen atoms.
0%
Contains a chain of carbon and oxygen atoms.
Explanation
$$\bf{Hint:}$$
It contains $$sp$$ and $$sp^{2}$$ hybridized carbon atoms.
$$\bf{Explanation:}$$
Unsaturated hydrocarbons are hydrocarbons that have double or triple covalent bonds between adjacent carbon atoms.
These have the general formula :
Alkene: $$C_{n}H_{2n}$$
Alkyne: $$C_{n}H_{2n-2}$$
Here, $$n=1,2,3.....$$
Generally, carbon forms four bonds in saturated hydrocarbons but due to the presence of double and triple bonds, unsaturated hydrocarbons contain fewer hydrogen atoms than is needed for carbon to have its usual valency of four.
For examples:
Unsaturated hydrocarbons can have 2 or more than 2 carbons.
Unsaturated hydrocarbons need not to have oxygen in it.
$$\bf{Final \ answer:}$$ Option $$B$$
An allotropic form of carbon used for cutting and drilling is :
Report Question
0%
charcoal
0%
bone charcoal
0%
graphite
0%
diamond
Explanation
Diamond is the hardest allotrope of carbon so it is used for cutting or drilling purpose.
Incomplete combustion of fuel produces:
Report Question
0%
$$CO_2$$
0%
$$CO$$
0%
$$H_2O$$
0%
$$H_2$$
Explanation
A reaction or process which entails only partial burning of a fuel. This may be due to a lack of oxygen or low temperature preventing the complete chemical reaction. $$CO$$ is produced as a byproduct of incomplete combustion of carbon.
The allotrope of carbon which is a good conductor of heat and electricity is:
Report Question
0%
diamond
0%
sugar charcoal
0%
graphite
0%
wood charcoal
Explanation
Graphite is an allotrope of carbon, other than diamond. It is a non-metal but still is a good conductor of heat and electricity.
In some cases, atoms in the same element can be arranged in two or more ways. This is called :
Report Question
0%
covalency
0%
allotropy
0%
multiple proportions
0%
isomerism
Explanation
Allotropy or allotropism is the property of some chemical elements to exist in two or more different forms, in the same physical state, known as allotropes of these elements.
In which of the following are all carbon atoms only triple bonded?
Report Question
0%
$$C_3H_6$$
0%
$$C_2H_4$$
0%
$$C_2H_2$$
0%
$$C_2H_6$$
Explanation
$$C_3H_6 : \begin{matrix}&&H\\&&|\\H&-&C&-&C&=&C&-&H\\&&|&&|&&|\\&&H&&H&&H\end{matrix}$$
$$C_2H_4 : \begin{matrix}H&-&C&=&C&-&H\\&&|&&|\\&&H&&H\end{matrix}$$
$$C_2H_2 : H-C\equiv C-H$$
$$C_2H_6 : \begin{matrix}&&H&&H\\&&|&&|\\H&-&C&-&C&-&H\\&&|&&|\\&&H&&H\end{matrix}$$
In the compound $$C_2H_2$$, the carbon atoms are only triply bonded.
Which of the following compounds behave as an unsaturated hydrocarbon?
Report Question
0%
Butane
0%
Ethane
0%
Ethyl alcohol
0%
Ethene
Explanation
Unsaturated hydrocarbons are hydrocarbons that have double or triple covalent bonds between adjacent carbon atoms. Those with at least one carbon to carbon double bond are called alkenes and those with at least one carbon to carbon triple bond are called alkynes.
Hene, option D is correct.
Crystalline form of carbon having 60 carbon atoms joined together is called :
Report Question
0%
graphite
0%
buckminsterfullerene
0%
coal
0%
diamond
Explanation
Buckminsterfullerene is a spherical fullerene molecule with the formula C-60. It has a cage-like fused ring structure that resembles a soccer ball made of hexagons and pentagons with a C atom at each vertex.
Complete combustion of hydrocarbon produces :
Report Question
0%
$$CO+H_2O$$
0%
$$CO+H_2$$
0%
$$CO_2+H$$
0%
$$CO_2+H_2O$$
Explanation
Hydrocarbons undergo complete combustion when a sufficient amount of oxygen is available. During the complete combustion of hydrocarbons, carbon dioxide and water are formed.
For example: $$CH_{4\;}+\;2O_{2\;}\rightarrow\;CO_2\;+\;2H_2O$$
When an insufficient amount of oxygen is present incomplete combustion occurs, and the products are carbon monoxide, water, and carbon. So the correct option is D.
What type of reaction occurs between ethene and hydrogen?
Report Question
0%
Addition
0%
Dehydration
0%
Substitution
0%
Oxidation
Explanation
In addition reaction, unsaturated hydrocarbon adds hydrogen and gets converted into saturated hydrocarbon. In this reaction, ethene (an unsaturated hydrocarbon), when reacts with hydrogen, gets converted into saturated hydrocarbon.
Which non-metal is used for making lead pencils?
Report Question
0%
lead
0%
graphite
0%
zinc
0%
charcoal
Explanation
Graphite is a non-metal and considered to be a significant allotrope of carbon. It is used to make lead pencils.
The organic acid present in vinegar is :
Report Question
0%
methanoic acid
0%
ethanoic acid
0%
propanoic acid
0%
none of these
Explanation
Vinegar is also known as acetic acid and water. Acetic acid is ethanoic acid produced by the fermentation of ethanol by acetic acid bacteria. Vinegar is a cooking ingredient and commercially produced by fast or slow fermentation processes.
Which of the following types of forces bind together the carbon atoms in diamond?
Report Question
0%
Van der Waal's forces
0%
Ionic
0%
Covalent
0%
Dipolar
Explanation
Diamond is a covalent crystal. In diamonds, each carbon atom is $$sp^3$$ hybridized and strongly bonded to four adjacent carbon atoms located at the apices of a tetrahedron (a three-sided pyramid). The four valence electrons of each carbon atom participate in the formation of very strong covalent bonds. These bonds have the same strength in all directions. This gives diamonds their great hardness.
Given compounds: propyne, acetylene, butane, butanol, propene, ethane, and ethene. How many of these compounds are unsaturated?
Report Question
0%
7
0%
4
0%
5
0%
6
Explanation
Unsaturated compounds have double or triple bonds in their structures.
Propyne- Triple bond
Acetylene-Triple bond
Propene- Double bond
Ethene-Double bond
Butane, butanol, and ethane have single bonds, hence are saturated compounds.
So, the correct option is B.
Generally, non-metals are not good conductors of electricity.
Which of the following is a good conductor of electricity?
Report Question
0%
Diamond
0%
Graphite
0%
Buckminster fullerene
0%
None of the above
Explanation
Graphite has a layered planar structure. Carbon atoms in the plane are bonded covalently with only three of the four potential bonding sites. The fourth electron is free to migrate in the plane making graphite electrically conductive.
Which of the following is/are main component present in LPG?
Report Question
0%
methane
0%
propane
0%
butane
0%
Both B and C
Explanation
LPG is liquefied petroleum gas. The components are:
butane
propane
propene
butene
The main components are propane and butane. All the components are gases at normal temperature and pressures.
What is the combustion product of an organic substance that undergoes complete combustion?
Report Question
0%
$$H_2O$$
0%
$$CO_2$$
0%
Both A and B
0%
$$CO$$
Explanation
Organic compounds contain mainly carbon and hydrogen. They produce $$CO_2$$ and $$H_2O$$ on complete combustion.
The first three members of a homologous series are $$CH_4, C_2H_6, C_3H_8$$. The fifth member of this series will be:
Report Question
0%
$$C_5H_{10}$$
0%
$$C_5H_{14}$$
0%
$$C_5H_{12}$$
0%
$$C_5H_{8}$$
Explanation
General formula of homologous series is $$C_{n}H_{2n + 2}$$.
First member is methane i.e. $$CH_{4}$$
Second member is ethane i.e. $$C_{2}H_{6}$$
Third member is propane i.e. $$C_{3}H_{8}$$
Forth member is butane i.e.
$$C_{4}H_{10}$$
Similarly, fifth member is pentane i.e
$$C_{5}H_{12}$$
Sodium hydroxide is found in:
Report Question
0%
limewater
0%
milk of magnesia
0%
window cleaner
0%
soap
Explanation
When esters are treated with sodium hydroxide (an alkali) it forms alcohol and sodium salt of carboxylic acid. This reaction is known as the saponification reaction because it is used in the preparation of soap. Soaps are sodium or potassium salts of long-chain carboxylic acids. So we can say that sodium hydroxide is found in soap.
$$\bullet$$ Lime water has $$Ca(OH)_2$$
$$\bullet$$ Milk of magnesia has $$Mg(OH)_2$$
$$\bullet$$ Window cleaner has $$NH_4OH$$
Hence, option $$D$$ is correct.
Preceeding and succeeding homologous of $${C}_{10}{H}_{22}$$ respectively:
Report Question
0%
$${C}_{9}{H}_{20}, {C}_{11}{H}_{22}$$
0%
$${C}_{9}{H}_{20}, {C}_{11}{H}_{24}$$
0%
$${C}_{11}{H}_{24}, {C}_{9}{H}_{20}$$
0%
$${C}_{8}{H}_{18}, {C}_{9}{H}_{20}$$
Explanation
Preceeeding homologue is $$C_{9}H_{20}$$.
Succeeding homologue is $$C_{11}H_{24}$$.
Thus, option B is correct.
The property of self-linkage of carbon atoms is called:
Report Question
0%
addition
0%
catenation
0%
cracking
0%
neutralisation
Explanation
Catenation is the linkage of atoms of the same element into longer chains. Catenation occurs most readily in carbon, which forms covalent bonds with other carbon atoms to form longer chains and structures.
This is the reason for the presence of the vast number of organic compounds in nature.
Hence, option B is correct.
Hydrocarbons having double or triple bonds are known as:
Report Question
0%
saturated
0%
unsaturated
0%
homologues
0%
functional groups
Explanation
The hydrocarbons containing only single bonds are called saturated hydrocarbons because each of the carbon atoms is bonded to a maximum number of atoms possible, i.e. you cannot add any other atom to it without replacing the existing one. Therefore, it is said to be saturated
Hydrocarbons containing double and triple bonds on other hand have the ability to still accept additional hydrogen / other atoms without replacing any of the existing atoms. The double/ triple bond can be cleaved and hydrogen/another atom can be added in its place without replacing the existing one. Hence, they are termed as ' unsaturated '.
A product obtained by mixing sodium hydroxide with vegetable oil is:
Report Question
0%
acid
0%
base
0%
soap
0%
vinegar
Explanation
When vegetable oil reacts with sodium hydroxide$$(NaOH)$$, it produces sodium salt of carboxylic acid(soap).
$$\implies Vegetable\ oil+NaOH\longrightarrow \underbrace {R-CO\overset {\circleddash}{O}Na}_{Soap}$$
Which of the following pairs are members of a homologous series?
Report Question
0%
$$CH_3OCH_3; CH_3CH_2OH$$
0%
$$CH_3CHO; CH_3CH_2CHO$$
0%
$$CH_3CH_2COOH; CH_3COOCH_3$$
0%
$$(CH_3)_2CHOH; CH_3CH_2OH$$
Explanation
Acetaldehyde i.e $$CH_{3}CHO$$ and propionaldehyde i.e
$$CH_{3}CH_{2}CHO$$ belong from the aldehyde family hence they are homologous series.
Hence, option B is the correct answer.
The molecular formula of butane is:
Report Question
0%
$$C_4H_{10}$$
0%
$$C_5H_{12}$$
0%
$$C_4H_8$$
0%
$$C_4H_6$$
Explanation
The general molecular formula of an alkane is $$C_{n}H_{2n+2}$$.
For butane, the value of n is 4. So the chemical formula of butane would be $$C_{4}H_{2\times 4 + 2}=C_{4}H_{10}$$.
So, the correct option is A.
Carbon in __________ form conducts electricity.
Report Question
0%
Diamond
0%
Graphite
0%
Coal
0%
Petroleum
Explanation
Graphite is an allotrope of carbon. It is a good conductor of electricity. This is because one valence electron of each carbon remains free, thus making it a good conductor of electricity.
Which of the following is not an allotrope of carbon?
Report Question
0%
Buckyballs
0%
Diamond
0%
Graphite
0%
Carbon dioxide
Explanation
Buckyballs, diamond, and graphite are allotropes of carbon while carbon dioxide is a compound of carbon.
Hence, option D is correct.
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
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
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 10 Chemistry Quiz Questions and Answers
<
>
Support mcqexams.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page
