Carbon and its Compounds Test

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Carbon and its Compounds Test - 18

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Weekly Quiz Competition

Question 1
1 / -0

The general formula for alkane is :

A
$$C_nH_{2n}$$

B
$$C_nH_{2n-2}$$

C
$$C_nH_{2n+2}$$

D
$$C_nH_{2n+1}$$

Solution

The general formula for alkane is $$C_nH_{2n+2}$$.
Some of alkanes are,
$$C_3H_8-$$ propane
$$C_5H_{10}-$$ pentane
$$C_2H_6-$$ ethane
$$CH_4-$$ methane
Question 2
1 / -0

Give the IUPAC name for $$H_3C\! -\! CH_2\! -\! CH_2\! -\! OH$$.

A
Propanal

B
Propanol

C
Propionic acid

D
Propane

Solution

As it contains 3 carbon chain and the functional group is alcohol so the name of the compound will be propanol.

$$H_3C\! -\! CH_2\! -\! CH_2\! -\! OH$$
Question 3
1 / -0

Oils on treatments with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of :

A
addition reaction

B
substitution reaction

C
displacement reaction

D
oxidation reaction

Solution

This is an example of alkene addition reaction, which is a process called hydrogenation.
In a hydrogenation reaction, two hydrogen atoms are added across the double bond of an alkene, resulting in a saturated alkane.
Thus, option "A" is correct.
Question 4
1 / -0

Carbon is used as abrasive as well as a __________.

A
drying agent

B
lubricant

C
explosive

D
none of these

Solution

A drying agent is a chemical that is used to remove water from a substance. But carbon is not used as a drying agent or as an explosive.
Due to different allotropic forms of carbon, it is used as an abrasive as well as lubricant. Graphite is the allotrophic form of carbon that is used as a lubricant. Diamond is another allotropic form of carbon that is very hard and, hence it makes an excellent abrasive. So option B is correct.
Question 5
1 / -0

When ethanol react with sodium,which gas will produce?

A
hydrogen

B
oxygen

C
sodium ethoxide

D
carbon dioxide

Solution

If a small piece of sodium is dropped into some ethanol, it reacts steadily to give off bubbles of hydrogen gas and leaves a colourless solution of sodium ethoxide, $$CH_3CH_2ONa$$ and hydrogen gas is evolved.
$$2C_2H_5OH + 2Na \rightarrow 2C_2H_5ONa + H_2$$
Option A is correct.
Question 6
1 / -0

Which of the following is not a saturated hydrocarbon?

A
Cyclohexane

B
Benzene

C
Butane

D
Pentane

Solution

Always suffix -ene contains double bond between carbon atoms and in case of -yne, it contains triple bond between carbon atoms, where as in case of -ane it contains single bond between carbon atoms. Saturated hydrocarons contain single bond between carbon atoms. Hence, here benzene is not a saturated hydrocarbon.
Question 7
1 / -0

Carbon forms four covalent bonds by sharing its four valence electrons with univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of :

A
helium

B
neon

C
argon

D
krypton

Solution

After the formation of four bonds carbon attains the electronic configuration of neon (ideal gas with atomic number 10) which is the tenth element with a total of 10 electrons.

Hence, option B is correct.
Question 8
1 / -0

In the soap micelles

A
The ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster

B
The ionic end of soap is on the interior of the cluster the carbon chain is out of the cluster.

C
Both ionic end and carbon chain are in the interior of the cluster

D
Both ionic end and carbon chain are on the exterior of the cluster
Question 9
1 / -0

Catenation is defined as:

A
formation of double bond between carbon atoms.

B
linking of carbon atoms with of atoms other elements.

C
linking of carbon atoms with other carbon atoms to form a long chain

D
the formation of four covalent bonds by a carbon atom.

Solution

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.

Hence, option C is the correct answer.
Question 10
1 / -0

In the presence of concentrated sulphuric acid $$(H_2SO_4)$$, acetic acid reacts with ethyl alcohol to produce :

A
aldehyde

B
alcohol

C
ester

D
carboxylic acid

Solution

$$ { CH }_{ 3 }COOH $$ + $$ { CH }_{ 3 }{ CH }_{ 2 }OH $$ $$ \underrightarrow { Conc{ H }_{ 2 }{ SO }_{ 4 } }$$ $$ { CH }_{ 3 }COO{ C }_{ 2 }{ H }_{ 5 } +{ H }_{ 2 }{ O }$$
During esterification, oxygen of alcohol is found in main product that is nothing but ester. This indicates that H of alcohol is eliminated as water molecule.

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Carbon and its Compounds Test - 18

Result

Carbon and its Compounds Test - 18

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SHARING IS CARING

Question 1

$$C_nH_{2n}$$

$$C_nH_{2n-2}$$

$$C_nH_{2n+2}$$

$$C_nH_{2n+1}$$

Solution

Question 2

Propanal

Propanol

Propionic acid

Propane

Solution

Question 3

addition reaction

substitution reaction

displacement reaction

oxidation reaction

Solution

Question 4

drying agent

lubricant

explosive

none of these

Solution

Question 5

hydrogen

oxygen

sodium ethoxide

carbon dioxide

Solution

Question 6

Cyclohexane

Benzene

Butane

Pentane

Solution

Question 7

helium

neon

argon

krypton

Solution

Question 8

The ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster

The ionic end of soap is on the interior of the cluster the carbon chain is out of the cluster.

Both ionic end and carbon chain are in the interior of the cluster

Both ionic end and carbon chain are on the exterior of the cluster

Question 9

formation of double bond between carbon atoms.

linking of carbon atoms with of atoms other elements.

linking of carbon atoms with other carbon atoms to form a long chain

the formation of four covalent bonds by a carbon atom.

Solution

Question 10

aldehyde

alcohol

ester

carboxylic acid

Solution

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