Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Which one of the following shows the carbylamine reaction in the presence of heat?

The coordination number in hcp is ____________.

Which one of the following statements about packing in solids is incorrect?

Which of the following is the correct increasing order of packing efficiency for hcp, bcc and simple cubic lattice?

When molten zinc is converted into the solid state, it acquires hcp structure. The number of nearest neighbours of Zn will be ____________.

PCl₅ is possible but NCl₅ does not exist:

Lucas reagent is ____________.

Lucas test is used for the detection of _____________.

The compound which reacts fastest with Lucas reagent at room temperature is:

In the reduction \[\ce{R - CHO + H2 -> RCH2OH}\] the catalyst used is:

By which of the following methods alcohol can be prepared in excellent yield?

Which of the following are used to convert RCHO into RCH₂OH?

(i) H₂/Pd

(ii) LiAlH₄

(iii) NaBH₄

(iv) Reaction with RMgX followed by hydrolysis

Dehydration of 2-butanol yields:

Which of the following is not true in case of reaction with heated copper at 300°C?

Lucas test is done to differentiate between ____________.

Which one of the following on oxidation gives a ketone?

Primary and secondary alcohols on the action of reduced copper give:

The compound which gives the most stable carbonium ion on dehydration is:

Cyclohexene is best prepared from cyclohexanol by which of the following:

During dehydration of alcohols to alkenes by heating with cone. H₂SO₄ the initial step is ____________.