Which of the following does not react with sodium metal?

• (CH₃)₂O

• CH₃CH₂OH

• CH₃COOH

• C₆H₅OH

The element which on burning in air gives peroxide is

• lithium

• sodium

• rubidium

• caseium

Which compound is used in photography?

• Na₂SO₅

• Na₂S₂O₈

• Na₂S₂6

• Na₂S₂O₃

Sodium thiosulphate is a

• reducing agent

• oxidising agent

• complexing agent

• bleaching agent

Plaster of Paris on making paste with little water sets to hard mass due to formation of

• CaSO₄

• CaSO₄.1/2 H₂O

• CaSO₄ H₂O

• CaSO₄.2H₂O

A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of

• Na₂S₄O₆

• Fe₂(SO₄)₃

• Fe₂(S₂O₃)₃

• Fe₂(S₂O₃)₂

The chemical which is used for plastering the broken bones is

• (CaSO₄)₂H₂O

• MgSO₄·7H₂O

• FeSO₄·7H₂O

• CuSO₄·5H₂O

Solution of sodium thiosulphate in photography works as

• to shine film

• to develop film

• to dissolve silver bromide

• to change negative into positive

349.

Which of the following is an organometallic compound?

• Lithium methoxide

• Lithium acetate

• Lithium dimethylamine

• Methyl lithium

Arrange Na⁺, Mg⁺ and Al³⁺ in increasing order of energy of hydration.

• Na⁺ < Mg⁺ < Al³⁺

•  Al³⁺<  Mg⁺ < Na⁺

• Al³⁺ < Na⁺ < Mg²⁺

• Mg²⁺< Al³⁺ < Na⁺