Model and Solved Question of Gen. science (Chemistry)
1. Commercial nitric acid is coloured due to dissolved :
A. nitrogen dioxide
B. sulfur
C. hydrogen
D. carbon dioxide
Ans: A. nitrogen dioxide
2. Chemical name for baking soda is :
A. sodium nitrate
B. sodium bicarbonate
C. sodium hydroxide
D. sodium acetate
Ans: B. sodium bicarbonate
3. Process of converting glucose into ethyl alcohol is done by :
A. amylase
B. cellulase
C. maltase
D. zymase
Ans: D. zymase
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4. Which acid is used in lead storage cells:
A. hydrochloric acid
B. acetic acid
C. sulfuric acid
D. nitric acid
Ans: C. sulfuric acid
5. Metallic constituents of hard water are :
A. calcium, magnesium and iron
B. calcium and tin
C. iron, magnesium and tin
D. iron and tin
Ans: A. calcium, magnesium and iron
6. Drinking soda is:
A. oxidant
B. neutral
C. acidic
D. alkaline
Ans: C. acidic
7. Which gas is used for artificial ripening of green fruit?
A. carbon dioxide
B. ethylene
C. ethane
D. acetylene
Ans: B. ethylene
8. The ore which is found in abundance in india is
A. monazite
B. magnetite
C. bauxite
D. fluorspar
Ans: A. monazite
9. The heat required to raise the temperature of body by 1 K is called
A. water equivalent
B. specific heat
C. thermal capacity
D. none of the above
Ans: C. thermal capacity
10. The names of the scientists, newlands, mendeleev and meyers are associated with the development of :
A. periodic table of contents
B. metallurgy
C. elements
D. atomic structure
Ans: A. periodic table of contents
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