Chemistry 4

Chemistry (Civil Service Examination), Questions and Answers, GK for UPSC, Bank PO & All Exams

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1. Which one of the following is not an essential micronutrient for plants? [1996]

 
 
 
 

2. The chemical used as a ‘fixer’in photography is [1995]

 
 
 
 

3. The most reactive among the halogens is [1997]

 
 
 
 

4. Assertion (A): Sodium metal is stored under kerosene. Reason (R): Metallic sodium melts when exposed to air. [1998]

 
 
 
 

5. Assertion (A) : To dilute sulphuric acid, acid is added to water and not water to acid. [1999]
Reason (R): Specific heat of water is quite large.

 
 
 
 

6. Consider the following statements: [1998]
Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to
1. act as the reducing agent
2. remove silica associated with the iron ore
3. function as fuel; to supply heat
4. act as an oxidizing agent Of these statements

 
 
 
 

7. Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance? [1996]

 
 
 
 

8. Match List I with List II and select the correct answer using the codes given below the lists: [1998]
List-1
A. Blue vitriol
B. Epsom salt
C. Baking soda
D. Caustic soda
List-II
1. Sodium bicarbonate
2. Sodium hydroxide
3. Magnesium sulphate
4. Copper sulphate
Codes:

 
 
 
 

9. Which one of the following metals does not form amalgam? [1998]

 
 
 
 

10. Match List 1 with List II and select the correct answer using the codes given below the lists: [1998]
List-I – List-II
A. Potassium bromide – 1. Fertiliser
B. Potassium nitrate – 2. Photography
C. Potassium sulphate – 3. Bakery
D. Monopotassium tartarate – 4. Gun powder Codes:

 
 
 
 

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