Hydrocarbons Test

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Hydrocarbons Test - 43

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Weekly Quiz Competition

Question 1
1 / -0

Which one will form thiophene when heated with sulphur or $$H_{2}S$$?

A
$$CH_{4}$$

B
$$C_{2}H_{6}$$

C
$$C_{2}H_{4}$$

D
$$C_{2}H_{2}$$

Solution

ethene C2H2 is product
Question 2
1 / -0

Which of the following alkenes will give an optically active alcohol when treated with $$H_{2}/H_{2}SO_{4}$$?

A
$$1-Butene$$

B
Ethene

C
Propene

D
$$2-Methyl$$ propene

Solution

only 1 butene is akenes will give an optically active alcohol when treated with H2/H2SO4?
Question 3
1 / -0

The reactivity of hydrogen atoms attached to the carbon atom in an alkane has the order:

A
tertiary $$>$$ primary $$>$$ secondary

B
secondary $$>$$ primary $$>$$ tertiary

C
tertiary $$>$$ secondary $$>$$ primary

D
primary $$>$$ secondary $$>$$ tertiary

Solution

Order of reactivity of hydrogen atoms is tertiary > secondary > primary.
Hence, Option "C" is the correct answer.
Question 4
1 / -0

Reaction of alkanes with halogen is explosive in case of:

A
$$Cl_{2}$$

B
$$F_{2}$$

C
$$Br_{2}$$

D
$$I_{2}$$

Solution

Reaction of alkanes with halogen is explosive in case of $$F_{2}$$.
Hence, Option "B" is the correct answer.
Question 5
1 / -0

The most important method to prepare lower hydrocarbon is

A
cracking

B
Sabatier-Senderen's reaction

C
heating salts of fatty acids with sodalime

D
direct synthesis

Solution

The most important method to prepare lower hydrocarbon is cracking.

For eg. : $$\mathrm{C_6H_{14} \xrightarrow{\Delta} \underset{Ethene}{C_2H_4} + \underset{Butane}{C_4H_{10}}}$$

Hence, Option "A" is the correct answer.
Question 6
1 / -0

Ethane can be prepared by

A
heating sodalime with sodium acetate

B
electroysis of sodium succinate

C
electroysis of sodium acetate

D
all of these

Solution

Reactions:
A) $$\mathrm{CH_3-COONa \xrightarrow[Sodalime]{\Delta} \underset{Methane}{CH_4} + CO_2}$$

B) Sodium succinate on electrolysis produce ethyne.

C) Sodium acetate on electrolysis produce ethane.

Hence, Option "C" is the correct answer.
Question 7
1 / -0

Action of heat on a mixture of sodium propanoate and sodalime produces

A
methane

B
ethane

C
propene

D
ethylene

Solution

Action of heat on a mixture of sodium propanoate and sodalime:
$$\mathrm{CH_3CH_2COONa \xrightarrow[Sodalime]{\Delta} CH_3-CH_3 +CO_2}$$

So, the product obtained is ethane.
Hence, Option "B" is the correct answer.
Question 8
1 / -0

The IUPAC name of neo-pentane is:

A
$$2-$$ methyl butane

B
$$2,2-$$ dimethyl butane

C
$$2-$$ methyl propane

D
$$2,2-$$ dimethyl propane

Solution

Neo-pentane is $$\mathrm{CH_3-C(CH_3)(CH_3)-CH_3}$$.
So, IUPAC Nme of Neo-pentane is 2,2-dimethylpropane.

Hence, Option "D" is the correct answer.
Question 9
1 / -0

Finely divided platinum and palladium commonly known as platinum and palladium black, may be prepared by reducing their,soluble salts with:

A
$$H_{2}O$$

B
$$C_{2}H_{5}OH$$

C
$$HCHO$$

D
$$C_{6}H_{6}$$

Solution
Question 10
1 / -0

Butane can be converted into 2-methylpropane, if heated with:

A
$$AlCl_{3}$$

B
$$Cr_{2}O_{3}$$

C
$$CrO_{2}Cl_{2}$$

D
Na/ether

Solution

Isomerisation of an alkane takes place when reacted with $$\mathrm{AlCl_3}$$.

So, for converting butane into 2-methylpropane, butane may be reacted with $$\mathrm{AlCl_3}$$.

Hence, Option "A" is the correct answer.

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Hydrocarbons Test - 43

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Hydrocarbons Test - 43

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Question 1

$$CH_{4}$$

$$C_{2}H_{6}$$

$$C_{2}H_{4}$$

$$C_{2}H_{2}$$

Solution

Question 2

$$1-Butene$$

Ethene

Propene

$$2-Methyl$$ propene

Solution

Question 3

tertiary $$>$$ primary $$>$$ secondary

secondary $$>$$ primary $$>$$ tertiary

tertiary $$>$$ secondary $$>$$ primary

primary $$>$$ secondary $$>$$ tertiary

Solution

Question 4

$$Cl_{2}$$

$$F_{2}$$

$$Br_{2}$$

$$I_{2}$$

Solution

Question 5

cracking

Sabatier-Senderen's reaction

heating salts of fatty acids with sodalime

direct synthesis

Solution

Question 6

heating sodalime with sodium acetate

electroysis of sodium succinate

electroysis of sodium acetate

all of these

Solution

Question 7

methane

ethane

propene

ethylene

Solution

Question 8

$$2-$$ methyl butane

$$2,2-$$ dimethyl butane

$$2-$$ methyl propane

$$2,2-$$ dimethyl propane

Solution

Question 9

$$H_{2}O$$

$$C_{2}H_{5}OH$$

$$HCHO$$

$$C_{6}H_{6}$$

Solution

Question 10

$$AlCl_{3}$$

$$Cr_{2}O_{3}$$

$$CrO_{2}Cl_{2}$$

Na/ether

Solution

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