MCQ Questions for Class 10 Chemistry Carbon And Its Compounds Quiz 8

The trends in physical properties of compounds within a homologous series are due to:

0%
change in size
0%
change in weight
0%
functional group
0%
both A and B

Number of carbon atoms in the longest chain is 3. A methyl group is present at carbon numberSo, IUPAC name is___________.

0%
2-ethyl propane
0%
butane
0%
2-methyl propane
0%
2-methyl butane

Unburnt carbon particles causes:

0%
stomach infections
0%
respiratory problems
0%
throat problems
0%
none of these

At standard conditions, X has an allotropic form that is a good electrical conductor. Identify X?

0%
Carbon
0%
Nitrogen
0%
Oxygen
0%
Neon
0%
Argon

Methylated spirit is ethanol containing methanol to render it unfit for drinking.

0%
True
0%
False

Identify the product(s) which will be formed by using the information provided about the reactants:

C_{4} H_{10} (g) + O_{2} (g) \to

${C}_{4}{H}_{10}(g)+{O}_{2}(g) \rightarrow$

0%
${C}_{4}{H}_{10}{O}_{2}$
0%
$CO+{H}+{2}{O}_{2}$
0%
${8CO}_{2}+{10H}_{2}$
0%
${C}_{2}{H}_{5}O$
0%
${CO}_{2}+{H}_{2}{O}_{2}$

Explanation

Butane with oxygen gas undergoes combustion reaction to form carbon dioxide gas and hydrogen gas.

On balancing we get the following equation:

2 C_{4} H_{10} + 13 O_{2} \to 8 C O_{2} + 10 H_{2}

$2C_4H_{10} + 13O_2 \rightarrow 8CO_2 + 10H_2$

Petrol engine gives off gaseous oxides of :

0%
silicon
0%
phosphorus
0%
boron
0%
nitrogen

Explanation

Petrol engine gives off gaseous oxides of

nitrogen

$\text{nitrogen}$ .
During combustion of fuel at high temperature, nitrogen and oxygen of air combine to form

N O

$NO$ and

N O_{2}

$\displaystyle NO_2$ and are released with the exhaust gas.

Hence, option

D

$D$ is correct.

Methane burns in air is ___________.

0%
Decomposition
0%
Synthesis
0%
Combustion
0%
Single displacement
0%
Double displacement

2 C_{3} H_{8} + 7 O_{2} \to 2 C O_{2} + 8 H_{2} O + 2 C O + 2 C

$2C_3H_8 + 7O_2 \rightarrow 2CO_2 + 8H_2O + 2CO + 2C$

Name the type of reaction.

0%
Combustion
0%
Incomplete combustion
0%
Condensation
0%
None of these

Explanation

The reaction

2 C_{3} H_{8} + 7 O_{2} \to 2 C O_{2} + 8 H_{2} O + 2 C O + 2 C

$\displaystyle 2C_3H_8 + 7O_2 \rightarrow 2CO_2 + 8H_2O + 2CO + 2C$ is an example of incomplete combustion reaction. Propane, on incomplete combustion gives carbon dioxide, water, carbon monoxide and carbon.

Complete combustion of alkenes requires sufficient:

0%
oxygen
0%
hydrogen
0%
nitrogen
0%
sulphur

Explanation

Complete combustion of alkene requires sufficient oxygen. Alkene on combustion in presence of sufficient oxygen will give carbon dioxide and water.

C H_{2} = C H_{2} + 3 O_{2} \to 2 C O_{2} + 2 H_{2} O

$\displaystyle CH_2=CH_2 + 3O_2 \rightarrow 2CO_2 + 2H_2O$

Carbon monoxide is produced by :

0%
incomplete combustion of fuels
0%
complete combustion of fuels
0%
neutralization of fuels
0%
none of these

Explanation

Carbon monoxide is produced by incomplete combustion of fuels.
The complete combustion of fuels will give carbon dioxide.

C + \frac{1}{2} O_{2} \to C O

$\displaystyle C + \dfrac {1}{2}O_2 \rightarrow CO$

C + O_{2} \to C O_{2}

$\displaystyle C + O_2 \rightarrow CO_2$

C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + H_{2} O

$C_3H_8 + 5O_2\rightarrow 3CO_2 + H_2O$

Name the type of reaction.

0%
Double displacement reaction
0%
Combustion reaction
0%
Hydrogenation reaction
0%
Displacement reaction

Explanation

The reaction

C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + H_{2} O

$\displaystyle C_3H_8 + 5O_2\rightarrow 3CO_2 + H_2O$ is an example of combustion reaction. Propane on complete combustion in presence of excess oxygen gives carbon dioxide and water.

LPG is liquefied petroleum gas which is a compound of butane and propane and used as :

0%
cooking fuel
0%
motor fuel
0%
refrigeration
0%
All of these

Alkanes are used as fuel:

0%
because there is evolution of large amount of heat during combustion.
0%
because there is evolution of large amount of heat during conduction.
0%
because there is evolution of large amount of heat during neutralization.
0%
because there is absorption of large amount of heat during combustion.

A chemical process in which a substance reacts with oxygen to give off heat is______

0%
respiration
0%
combustion
0%
explosion
0%
conduction

Explanation

A chemical process in which a substance reacts with oxygen to give off heat is combustion.
For example, when C is burnt in excess air, it gives carbon dioxide and heat.

C + O_{2} \to C O_{2} +

$\displaystyle C + O_2 \rightarrow CO_2 +$ heat

Use of petrol and diesel as fuel in automobiles is starting to be replaced by:

0%
LPG
0%
CNG
0%
Bitumen
0%
Coal

Benzene when heated in air burns with ________ and produces

C O_{2}

$CO_2$ and

H_{2} O

$H_2O$ .

0%
sooty flame
0%
non-sooty flame
0%
light color flame
0%
none of these

Explanation

Benzene when heated in air burns with a sooty flame and produces

C O_{2}

$\displaystyle CO_2$ and

H_{2} O

$\displaystyle H_2O$ .

C_{6} H_{6} + \frac{15}{2} O_{2} \to 6 C O_{2} + 3 H_{2} O

$\displaystyle C_6H_6 + \dfrac {15}{2} O_2 \rightarrow 6CO_2 + 3H_2O$

Note: Incomplete combustion of unsaturated hydrocarbons give sooty flame due to the presence of black unburnt carbon particles.

LPG burns more cleanly than higher molecular weight hydrocarbon :

0%
because it releases volatile pollutants
0%
because it releases less pollutants
0%
because it releases pollutants which are toxic
0%
because it releases more pollutants

Homologous series is____________.

0%
a series of compounds in which the same functional group substitutes for hydrogen in a carbon chain.
0%
a series of compounds in which different functional group substitutes for hydrogen in a carbon chain.
0%
a series of compounds with same molecular formula and different structural formulae.
0%
a series of compounds with same molecular formula but different functional groups.

Explanation

Homologous series is a series of compounds in which the same functional group substitutes for hydrogen in a carbon chain. The chemical properties of the compounds are very similar.

Example of a homologous series:

C H_{3} O H, C_{2} H_{5} O H, C_{3} H_{7} O H, C_{4} H_{9} O H

$CH_3OH, C_2H_5OH, C_3H_7OH, C_4H_9OH$

The chief source(s) of oils used to make soap is/are:

0%
petroleum products
0%
coal and coke
0%
plants and animals
0%
none of the above

A five carbon chain with a double bond would be named :

0%
pentane
0%
pentyne
0%
pentone
0%
pentene

Explanation

For five carbon atoms, 'pent' word root is used and for double bond 'ene' suffix is used.

Hence, the name will be pentene.

Unsaturated hydrocarbons are known as alkene and alkynes.

The general formula for alkene is

C_{n} H_{2 n}

$C_nH_{2n}$ .

n = 5

$n = 5$ ,

C_{n} H_{2 n} = C_{5} H_{10}

$C_nH_{2n} = C_5H_{10}$ is pentene.

Option D is correct.

Which of the given statements is true?

0%
The ionic end of soap dissolves in water while the carbon chain dissolves in oil.
0%
The ionic end of soap dissolves in oil while the carbon chain dissolves in water.
0%
The ionic end of soap and the carbon chain both dissolve in water.
0%
The ionic end of soap and the carbon chain both dissolve in oil.

Compound with a molecular formula

C_{7} H_{16}

$C_7H_{16}$ will have:

0%
single covalent bonds only.
0%
at least one double bond.
0%
at least one triple bond.
0%
none of these

Explanation

Compound with molecular formula

C_{7} H_{16}

$C_7H_{16}$ satisfies the general formula of alkanes i.e.

C_{n} H_{2 n + 2}

$C_nH_{2n+2}$ with

n = 7

$n= 7$ . Hence it can only have single covalent bonds between the carbon atoms.

Carbon compounds with one multiple bond are called :

0%
alkenes
0%
alkynes
0%
alkanes
0%
both alkenes and alkynes

Explanation

Compounds containing double and triple bonds are known as unsaturated hydrocarbon. General formula for alkenes and alkynes are

C_{n} H_{2 n} a n d C_{n} H_{2 n - 2}

$C_nH_{2n} \ and \ C_nH_{2n-2}$ . Both alkanes and alkynes can have single as well as multiple bonds in their structure.

Hence, option

D

$D$ is correct.

LPG releases ______ of the

C O_{2}

$CO_2$ per kWh produced by oil.

0%
89%
0%
81%
0%
79%
0%
0%

Explanation

LPG releases 81% of the

C O_{2}

$CO_2$ per Kwh produced by oil.
LPG, at atmospheric pressure, has a higher calorific value

94 M J / m^{3}

$94\ MJ/m^3$ which is equivalent to

26.1 k W h / m^{3}

$26.1 \ kWh/m^3$ .

Acetic acid is:

0%
methanoic acid
0%
ethanoic acid
0%
propanoic acid
0%
none of these

Explanation

Acetic acid is ethanoic acid with chemical formula as

C H_{3} C O O H

$CH_3COOH$ . Its solution in water also called vinegar.

Which of the following statements are correct?

0%
Unsaturated hydrocarbons add hydrogen to give saturated hydrocarbons.
0%
Catalysts are used for addition reactions of unsaturated hydrocarbons.
0%
Hydrogenation of vegetable oils is an example of addition reaction.
0%
All of the above

Iso-octane reacts with oxygen:

0%
Endothermically
0%
Exothermically
0%
Only some activation energy is required
0%
Doesn't react

Explanation

$2,2,4-$ trimethylpentane (isooctane), widely used in gasoline, has a chemical formula of $C_8H_8$ and it reacts with oxygen exothermically as shown below:

$2C_8H_{18}(l) + 25O_2(g) \longrightarrow 16CO_2(g) + 18H_2O(g)$

Which of the following do not give an addition reaction?

0%
Alkanes
0%
Alkenes
0%
Alkynes
0%
Carbonyl compounds

Hydrogenation of alkyne may give :

0%
alkane
0%
alkene
0%
both alkane and alkene
0%
polymer

CBSE Questions for Class 10 Chemistry Carbon And Its Compounds Quiz 8 - MCQExams.com

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Practice Class 10 Chemistry Quiz Questions and Answers

CBSE Questions for Class 10 Chemistry Carbon And Its Compounds Quiz 8 - MCQExams.com

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Practice Class 10 Chemistry Quiz Questions and Answers

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