Chemical Energy Past Paper 2020

1: A fluid means:

A. Liquid only

B. Gas only

C. Solid only

D. Both a and b

2: “µ” stands for the fluid:

A. Density

B. Velocity

C. Viscosity

D. None of the above

3: PH of water is:

A. 7.9

B. 13

C. 4.9

D. 7

4: Which pH corresponds to acid?

A. 14

B. 9

C. 7

D. 3

5: Oxidation occurs at?

A. Cathode

B. Anode

C. Both a and b

D. None of these

6: Temperature at which a solid change into a liquid is called:

A. Boiling point

B. Melting point

C. Freezing point

D. None of the above

7: Hydrocarbons are compounds formed form:

A. H & O

B. C & O

C. C & H

D. C & Ag

8: MOLARITY is:

A. It is the no of moles of the solute dissolved per liter of the solution

B. It is the no of atoms of the solute dissolved per liter of the water

C. It is the no of moles of the water dissolved per liter of the solution

D. None of above

9: What is the correct formula of heavy water?

A. H₂O₂

B. H₂O

C. D₂O

D. D₃O

10: What happens in the nuclear reactor?

A. Fusion

B. Fission

C. Chemical reaction

D. None of above

11: Which of the following is/are example(s) of rotary positive displacement pump(s)?

A. Diaphragm pump

B. Vane pump (not confirm)

C. Plunger pump

D. All of the above

12: Horsepower requirement for given pump capacity depends upon the:

A. Specific gravity of the liquid

B. Suction lift

C. Discharge head

D. All of the above

13: The monomer of PVC is:

A. Succinic

B. Vinyl chloride

C. Propylene

D. Glycol

14: Turbulent flow exists, when Reynolds No. exceed?

A. 2100

B. 2200

C. 2000

D. 1900

15: Law of conservation of matter states that:

A. Total mass of all materials entering a system in a given time must equal the total mass of materials leaving plus any accumulation in the system

B. Total mass of all materials entering a system in a given time must equal the total mass of materials leaving from the system

C. Total mass of all materials entering a system in a given time must not equal the total mass of materials leaving plus any accumulation in the system

D. None of A, B & C (I think)

16: What happened in endothermic Reaction?

A. Heat is evolved

B. Heat is absorbed

C. No heat is evolved

D. No heat is absorbed

17: What is ion exchange process?

A. Ion Exchange system separate ionic contaminants from solution through a specialized resin where undesirable ions are replaced by other ions of the same electrical charge.

B. Ion Exchange system mixes ionic contaminants from solution through a specialized resin where undesirable ions are replaced by other ions of the same electrical charge.

C. Ion Exchange system dissolves ionic contaminants from solution through a specialized resin where undesirable ions are replaced by other ions of the same electrical charge.

D. Ion Exchange systems leach ionic contaminants from solution through a specialized resin where undesirable ions are replaced by other ions of the same electrical charge.

18: Rotary drum vacuum filter consists of a drum rotating in a tub of liquid to be filtered. The technique is well suited for which of the following types of materials?

A. Slurries and liquids with a high solid content

B. Gases with a high solid content

C. Slurries only

D. Gases and liquids with a high solid content

19: Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from which of the following type of materials?

A. Solid & semi-solid materials

B. Gaseous materials only

C. Amorphous materials

D. Liquid materials only

20: Size reduction is a process of reducing large solid unit masses into small unit masses, coarse particles or fine particles. This process is also termed as?

A. Diminution

B. Pulverizations

C. Both A & B

D. None of A & B