Hydrocarbons Test

Result

Hydrocarbons Test - 48

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

$$CH\equiv CH\xrightarrow[Pressure]{Ni(CN)_{2}}X$$. Here X in the reaction

A
Benzene

B
Ethane

C
Cyclooctatetraene

D
Cyclohexane

Solution
Question 2
1 / -0

$$CH_3 - CH_2 - CH_2Br + KOH (alc.) \rightarrow $$ Product Product in above reaction is

A
$$CH_3 - CH = CH_2$$

B
$$CH_3 - CH_2 - CH_3$$

C
(a) and (b) both

D
None of these

Solution

this is called Elimination reaction E1 andd E2
si the $$CH_3- CH_2-CH_2Br+ KOH(Alc) \rightarrow CH_3-CH= CH_2$$
Question 3
1 / -0

Which of the following compound has maximum boiling point?

A
$$n-$$ hexane

B
$$n-$$ pentane

C
$$2, 2-$$ dimethyl propane

D
$$2-$$ methyl butane

Solution

$$n-$$ hexane because it is linear so it has larger surface area therefore strong Van der Waal force.
Question 4
1 / -0

Which of the following has maximum boiling point?

A
iso-octane

B
$$n-$$ octane

C
$$2, 2, 3, 3-$$ tetramethyl butane

D
$$n-$$ butane

Solution

$$n-$$ octane has maximum boiling point.

Boiling point depends on molecular mass. Greater the molecular mass higher will be the boiling point.

Boiling point also depends on the structure. If two compounds have some molecular mass then straight chain or linear compounds has higher boiling point.
Question 5
1 / -0

Alkenes usually show which type of reaction

A
Addition

B
Substitution

C
Elimination

D
Superposition

Solution

Alkenes are unsaturated hydrocarbon having double bond so generally gives addition reaction.

Example: $$CH_2=CH_2+HBr\to CH_3-CH_2Br$$
Question 6
1 / -0

Ethylene reacts with bromine to form

A
$$Br - CH_2 - CH_3$$

B
$$CH_3 - CBr_3$$

C
$$Br - CH_2 - CH_2Br$$

D
$$CHBr_3$$

Solution

Alkenes react in the cold with pure liquid bromine, or with a solution of bromine in an organic solvent like tetrachloromethane. The double bond breaks, and a bromine atom becomes attached to each carbon. ... In the case of the reaction with ethene, 1,2-dibromoethane is formed.
Question 7
1 / -0

Propene on treatment with $$HBr$$ gives

A
Isopropyl bromide

B
Propyl bromide

C
1 , 2 - dibromoethane

D
None of the above

Solution

$$CH_3 - Ch = CH_2 + HBr \xrightarrow[Marko \ wnikoffs \ rule] CH_3 - \underset{Br}{\underset{|}{CH}} - CH_3$$
Question 8
1 / -0

The propene reacts with $$HBr$$ to form

A
Ethane

B
Hexane

C
1-bromo-propane

D
2-bromopropane

Solution
Question 9
1 / -0

The reaction of propene with $$HOCl$$ proceeds via the addition of

A
$$H^{+}$$ in the first step

B
$$Cl^{+}$$ in the first step

C
$$OH^{-}$$ in the first step

D
$$Cl^{+}$$ and $$OH^{-}$$ in a single step

Solution

Alkenes undergo Electrophilic addition reactions. $$HOCl$$ on self Ionization produces $$Cl^+$$ which attacks 1st.
$$HOCl+HOCl $$ $$\rightarrow $$ $$H_2O$$$$+OCl^-+Cl^+$$

Option B is correct.
Question 10
1 / -0

Analyse the following reaction and identify the nature of A and B

A

B

C

D

E

Solution