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

What is the basicity of \[\ce{H3PO4}\]?

Explain why Grignard reagents should be prepared under anhydrous conditions?

What is the basicity of H₃PO₄?

Explain why Grignard reagents should be prepared under anhydrous conditions? 

Explain why Grignard reagents should be prepared under anhydrous conditions?

What is the basicity of \[\ce{H3PO4}\]?

What is the basicity of \[\ce{H3PO4}\]?

Suggest a way to determine the `∧_"m"^∘`value of water.

Discuss the variation of conductivity and molar conductivity with concentration.

Explain why Grignard reagents should be prepared under anhydrous conditions?

What is the basicity of \[\ce{H3PO4}\]?

How much electricity in terms of Faraday is required to produce 20 g of Ca from molten CaCl₂?

(Given: Molar mass of Calcium is 40 g mol⁻¹.)

What happens when \[\ce{CH3 - Br}\] is treated with KCN?

Write the dispersed phase and dispersion medium of the following colloidal systems: 

(i) Smoke

(ii) Milk

Which solution is used for the leaching of silver metal in the presence of air in the metallurgy of silver?

Chlorobenzene is extremely less reactive towards a nucleophilic substitution reaction. Give two reasons for the same.

Account for the following: Oxygen shows catenation behavior less than sulphur.

Give a simple chemical test to distinguish between the following pair of compounds:

Ethanal and Propanal

Write the final product(s) in each of the following reactions:

Give reasons: SO₂ is reducing while TeO₂ is an oxidising agent.