The questions on the Chemistry subject which are part of the VOCLET examination is as mentioned below:

1. Phenolphthalein is an :

a) Acid Salt b) Acid

c) Alkali d) Indicator

Ans: d) Indicator

2. Coagulant used for the treatment of waste water is:

a) NaCl b) Na 2 SO 4

c) FeSO 4 d) KCl

Ans: c) Na 2 SO 4

3. Most commonly used vulcanising agent is :

a) Sulphur b) Dimond

c) Graphite d) Phosphorous

Ans: a) Sulphur

4. Which of the following compounds decolorised red bromine water solution:

a) CH 4 b) C 2 H 6

c) C 2 H 4 d) CCl 4

Ans: CCl 4

5. Which of the following compounds contains

a double bond :

a) C 2 H 2 b) CH 4

c) C 2 H 4 d) C 2 H 4

Ans: c) C 2 H 4

6. What is the pH value of 10 -8 N HCL:

a) 8 b) 6

c) 6.98 d) 9

Ans: a) 8

7. Galvanization means plating by :

a) Zn b) Sn

c) Ni d) Cu

Ans: a) Zn

8. For cathodic protection the mostly used metal is :

a) Zn b) Ca

c) Ni d) Mg

Ans: a) Zn

9. Which can stop bleeding due to small cut most easily ? :

a) K 2 SO 4 b) NaCl

c) Sugar d) Alum

Ans: d) Alum

10. Natural rubber consists of :

a) 1,3 butadiene b) Isoprene

c) But-1- ene d) Styrene

Ans: a) 1,3 butadiene

11. Which is used as lubricant? :

a) NaOH b) FeCl 3

c) H 3 PO 4 d) MoS 2

Ans: d) MoS 2

12. Picric acid is :

a) 2,4,6 trinitro benzoic acid b) 2,4-dinitro benzoic acid

c) 2,6-dinitro phenol d) 2,4,6-trinitro phenol

Ans: d) 2,4,6-trinitro phenol

13. The compound used in plastic industry :

a) C 2 H 4 b) HCHO

c) C 6 H 5 OH d) All of them

Ans: d) All of them

14. Which one of the following elements in coal decreases its Calorific value :

a) Nitrogen b) Hydrogen

c) Sulphur d) Carbon

Ans: a) Nitrogen

15. A chemical reaction is at equilibrium when:

a) The reactants are completely transformed in to products

b) The rate of froward and backward reactions are equal

16. Octane number of Isooctane is :

a) 0

b) 100

c) 92

d) 104

Ans: b) 100

c) Formation of product is stoped

d) Equal amount of reactants and products are present

Ans: d) Equal amount of reactants and products are present

17. Corrosion is a process of :

a) Oxidation

b) Reduction

c) Precipitation

d) Sublimation

Ans: a) Oxidation

18. Temporary hardness of water is due to :

a) CaCl 2

b) MgSO 4

c) Ca(HCO 3 ) 2

d) CaCO 3

Ans: c) Ca(HCO 3 ) 2

19. The suitability of a diesel fuel is determined by :

a) Octane Number

b) Length of hydrocarbon chain

c) Cetane number

d) % of carbon

Ans: c) Cetane number