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

Which is true for F-centers?

Which crystal system has axial angles equal to 90°?

Calculate the number of unit cells present in 1 g of gold which has a face-centered cubic lattice.

Which crystal system has a ≠ b ≠ c?

For which of the following reaction the units of rate constant and rate of the reaction are same?

Which process is usually applied for separating gangue from sulphide ores?

Aldehydes react with Grignard reagent to produce ____________.

Ketones react with Grignard reagent to produce ____________.

Primary alcohols are prepared by the reduction of carboxylic acids. Though lithium aluminium hydride is a strong reducing agent, it is not used in the reaction. This is so because:

Aldehydes are reduced to the corresponding alcohols by the addition of hydrogen in the presence of catalysts to form ____________.

Monochlorination of toluene in sunlight followed by hydrolysis by aq. \[\ce{NaOH}\] yields.

Benzaldehyde differs from acetaldehyde in that:

Nitro compounds are reduced by iron scrap and hydrochloric acid to yield one of the following compounds:

For producing amines, the reaction of nitro compounds with iron scrap is preferred because:

Quaternary ammonium salt is formed:

Hydrolysis of starch yields ____________.

The space lattice of graphite is ____________.

Coordination numbers of Zn²⁺ and S^2– in the crystal structure of wurtzite are ____________.

In face-centered cubic lattice, a unit cell is shared equally by how many unit cells?

The total number of tetrahedral voids in the face-centered unit cell is ______.