Chemistry Important Questions For Railway Exam – Group-D and RRB ALP Set – 2:

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Question 1:

Why is Compressed Natural Gas (CNG) considered as eco- friendly ?

a) It has very low quantity of hydro -carbons
b) Its main content (80-90%) is Ethane gas
c) It has very low carbon monoxide
d) Gases present in CNG do not burn fully hence emission remain low
e)None of these

Question 2:

The main element in the ‘Cattle Bone Powder’ is

a) Calcium
b) Phosphorus
c) Nitrogen
d) None

Question 3:

Which compound is used in Fertiliser?

a) Sodium bicarbonate
b) Calcium Nitrate
c) Potassium Nitrate
d) Sodium Nitrate

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Question 4:

What is the chemical formula for laughing gas?

a) CO2
b) CO
c) NO
d) N2O

Questions 5:

In the periodic table elements what is the symbol of Potassium?

a) Cu
b) Ni
c) K
d) Pi

Question 6:

Due to the presence of which gas, does Brass get discoloured in air?

a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen Sulphide

Question 7:

Chemical reactions that release energy by light or heat are called …

a) Endothermic Reaction
b) Redox Reaction
c) Exothermic Reaction
d) Ectothermic Reaction

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Question 8:

What is the ph value of blood?

a) 9.35
b) 7.35
c) 6.35
d) 8.35

Question 9:

Which of the following gases is found in the largest quantity in atmosphere?

a) Nitrogen
b) Oxygen
c) Carbondioxide
d) Helium

Question 10:

The main chemical constituent of clay is

a) silicon oxide
b) aluminum silicate
c) potassium zeolite
d) carbon dioxide

Solutions 1 to 10 

1) Answer (c)
2) Answer (b)
3) Answer (c)
4) Answer (d)
5) Answer (c)
6) Answer (d)
7) Answer (c)
8) Answer (b)
9) Answer (a)
10) Answer (b)

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