Carbon and its Compounds Test

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Carbon and its Compounds Test - 17

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Weekly Quiz Competition

Question 1
1 / -0

The ratio of the difference between number of hydrogens present in 'propane and propyne' and 'propane and propene' is:

A
1 : 2

B
2 : 1

C
3 : 2

D
2 : 3

Solution

No. of hydrogen atoms in propane( $$CH_{3}-CH_{2}-CH_{3}$$) = 8

No. of hydrogen atoms in propene ( $$CH_{3}-CH=CH_{2}$$) = 6

No. of hydrogen atoms in propyne ($$CH_{3}-C\equiv CH$$) = 4

The difference in no. of hydrogen atoms between propane and propyne = 8-4=4

The difference in no. of hydrogen atoms between propane and propene = 8-6=2

Therefore, the ratio $$= 4:2 = 2:1$$.
Question 2
1 / -0

Which type of carbon used in gas masks?

A
Graphite

B
Gas carbon

C
Lamp black

D
Wood charcoal

Solution

$$\text{Wood charcoal}$$ is good adsorbent and absorbs dust particles. Hence it is used in gas masks.
Question 3
1 / -0

Compounds of carbon and hydrogen which form long chains or branched chains are called:

A
Hydrogen carbon

B

Hydrocarbons

C

Hydrogen carbides

D
None of these

Solution

Compounds of carbon which contain carbon and hydrogen in their structures are called hydrocarbons.
Saturated hydrocarbons are called alkanes and unsaturated hydrocarbons are called alkene(double bond) or alkynes(triple bond).

Therefore, option $$B$$ is correct.
Question 4
1 / -0

The gas used in the hydrogenation of oils in presence of nickel as a catalyst is:

A
methane

B
ethane

C
oxygen

D
hydrogen

Solution

The gas used in the hydrogenation of oils in the presence of nickel as a catalyst is hydrogen.
Unsaturated hydrocarbon adds hydrogen in the presence of catalysts, such as nickel, to form saturated hydrocarbon.
Question 5
1 / -0

Which of the following is not a mixture of hydrocarbons?

A
Candle wax

B
Kerosene

C
Vegetable oil

D
Paraffin oil
Question 6
1 / -0

The bonds present in $$CH_4$$ are :

A
covalent

B
ionic

C
both A and B

D
none of A or B

Solution

Methane forms covalent bonds by sharing electrons between 1 C atom and 4 H atoms.
Question 7
1 / -0

Which of the following element shows the property of catenation?

A
C

B
Li

C
Be

D
F

Solution

Carbon is the most common element that exhibits catenation. It can form long hydrocarbon chains and rings like benzene.
Hence, option $$A$$ is correct.
Question 8
1 / -0

Etnanol reacts with sodium at room temperature, then a balanced equation is:

A
$$CH_3CH_2OH +Na\rightarrow CH_3CH_3+ 1/2NaOH$$

B
$$CH_3CH_2OH +Na\rightarrow CH_2CHONa+ H_2$$

C
$$CH_3CH_2OH +Na\rightarrow CH_3CH_2ONa+ 1/2H_2$$

D
$$CH_3CH_2OH +Na\rightarrow CH_3CH_3+ Na_2O$$

Solution

Reaction: Sodium reacts with Ethanol to form Sodium Ethoxide and release Hydrogen gas

$$2CH_3CH_2OH + 2Na\rightarrow 2CH_3CH_2ONa+ H_2$$
Question 9
1 / -0

Unsaturated hydrocarbons undergo:

A
a substitution reaction

B
an oxidation reaction

C
an addition reaction

D
none of the above

Solution

Unsaturated hydrocarbons contain either double or triple bonds, which are reactive, so they break easily and convert into single covalent bonds, hence they easily undergo addition reactions.
Example of addition reaction is:
$$CH_2=CH_2 + H_2\xrightarrow{Ni-catalyst} CH_3-CH_3$$
Question 10
1 / -0

Give the IUPAC name for $$CH_3\! -\! CH_2\! -\! CHO$$.

A
Propanal

B
Propanol

C
Propionic acid

D
None of these

Solution

As it contains three carbon atoms, so the word root will be "prop". Because of the presence of functional group aldehyde, we will use "al" as a secondary suffix. As the "al" begins with the vowel "a", we will drop down the "e" from "Propane" and replace with "al". Therefore, the naming for $$CH_3\! -\! CH_2\! -\! CHO$$ is "Propanal".

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Re-Attempt Weekly Quiz Competition

Carbon and its Compounds Test - 17

Result

Carbon and its Compounds Test - 17

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SHARING IS CARING

Question 1

1 : 2

2 : 1

3 : 2

2 : 3

Solution

Question 2

Graphite

Gas carbon

Lamp black

Wood charcoal

Solution

Question 3

Hydrogen carbon

Hydrocarbons

Hydrogen carbides

None of these

Solution

Question 4

methane

ethane

oxygen

hydrogen

Solution

Question 5

Candle wax

Kerosene

Vegetable oil

Paraffin oil

Question 6

covalent

ionic

both A and B

none of A or B

Solution

Question 7

C

Li

Be

F

Solution

Question 8

$$CH_3CH_2OH +Na\rightarrow CH_3CH_3+ 1/2NaOH$$

$$CH_3CH_2OH +Na\rightarrow CH_2CHONa+ H_2$$

$$CH_3CH_2OH +Na\rightarrow CH_3CH_2ONa+ 1/2H_2$$

$$CH_3CH_2OH +Na\rightarrow CH_3CH_3+ Na_2O$$

Solution

Question 9

a substitution reaction

an oxidation reaction

an addition reaction

none of the above

Solution

Question 10

Propanal

Propanol

Propionic acid

None of these

Solution

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