UPSC  Chemistry

1. The couple between base units of DNA is through

Hydrogen bonding Electrostatic bonding Covalent bonding vander Waal’s forces

Workspace

Comments

2. Sublimation is a process in which a solid

Changes into another allotropic form Changes into liquid form Changes into vapour form None of the above

Workspace

Comments

3. methanol and acetone can be separated by

Fractional distillation Distillation Steam distillation Vacuum distillation

Workspace

Comments

4. aniline is separated from a mixture by

Fractional crystallization Fractional distillation Vacuum distillation Steam distillation

Workspace

Comments

5. glycerol is purified by

Steam distillation Vacuum distillation Fractional distillation Simple distillation

Workspace

Comments

6. Two immiscible liquids are separated by

Separating funnel Fractional distillation Chromatography Sublimation

Workspace

Comments

7. Latest technique for purification, isolation and separation of organic compounds is-

Chromatography Steam distillation Crystallisation Vacuum distillation

Workspace

Comments

8. Oils are purified by

Fractional distillation Steam distillation Vacuum distillation Simple distillation

Workspace

Comments

9. Chromatography technique is used for the separation of

Small sample of mixture Plant pigments Dye stuffs All

Workspace

Comments

10. A mixture of naphthalene and benzoic acid can be separated by

Chromatography Sublimation Fractional crystallization Distillation

Workspace

Comments

 

*Click on the QNo to display a Question.

Total Ans