set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on metals, non metals, minerals, ores, properties, uses topic of general science mcq
- Oxygen gas present in the air
- Moisture present in the air
- Carbon dioxide gas present in the air
(a) (i) and (ii)
(b) (i) only
(c) (ii) only
(d) (ii) and (iii)
The correct answers to the above question in:
Answer: (a)
Both oxygen and moisture present in air cause rusting of iron.
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Question : 1
Which of the following is the electron configuration of a metallic element?
a) 2, 8, 7
b) 2, 8, 8
c) 2, 8
d) 2, 8, 8, 2
Answer »Answer: (d)
Question : 2
Assertion (A):
Sodium metal is stored under kerosene.
Reason (R):
Metallic sodium melts when exposed to air.
a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
b) (A) is true, but (R) is false
c) Both (A) and (R) are true and (R) is the correct explanation of (A)
d) (A) is false, but (R) is true
Answer »Answer: (b)
Question : 4
Consider the following elements:
- Copper
- Gold
- Platinum
- Silver
a) (i), (ii) and (iv)
b) (i) and (ii)
c) (ii) and (iii)
d) (iii) and (iv)
Answer »Answer: (a)
Cu, Au, and Ag are known as coinage metals and occur free in nature.
Because of nobility, they are frequently found in their native state.
Question : 5
Alumina is chief ore of which of the following metal?
a) Ca
b) Na
c) K
d) Al
Answer »Answer: (d)
Question : 6
Which of the following is not a atomic characteristics of metal –
a) ductile
b) malleable
c) electropositive nature
d) none of these
Answer »Answer: (d)
All are characteristics of metal.
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