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