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Q:

Which one of the followingis notan allotrope of carbon?

A) Coal B) Diamond
C) Graphite D) Graphene
 
Answer & Explanation Answer: A) Coal

Explanation:

Allotropy is the property of some chemical elements to exist in two or more different forms, or allotropes, when found in nature. There are several allotropes of carbon like diamond, graphite, graphene, fullerene, etc.Coal is not an allotrope of carbon because it is not 100% carbon. It contains lot of silica, sulphur and other compounds of carbon apart from carbon.

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Q:

Which of the following gases turns lime water milky?

A) O3 B) CO2
C) O2 D) CO
 
Answer & Explanation Answer: B) CO2

Explanation:
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Q:

Which of the following metals is the most Malleable?

A) Al B) Zn
C) Na D) Ag
 
Answer & Explanation Answer: C) Na

Explanation:
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Q:

Which among the following is true for the Supreme Court of India ?

A) Federal Court B) Court of Appeal
C) Guardian of the Constitution D) All of these
 
Answer & Explanation Answer: D) All of these

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Q:

The number of parliamentary seats (Lok Sabha) of Haryana is

A) 10 B) 26
C) 28 D) 48
 
Answer & Explanation Answer: A) 10

Explanation:
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Q:

Insulators have resistivity of the order of 

A) 106 Ω m to 108 Ω m B) 10-12 Ω m to 10-17 Ω m
C) 10-8 Ω m to 10-6 Ω m D) 1012 Ω m to 1017 Ω m
 
Answer & Explanation Answer: D) 1012 Ω m to 1017 Ω m

Explanation:
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Q:

Which of the following physical quantity measures the rate of work done?

A) Power B) Momentum
C) Force D) Energy
 
Answer & Explanation Answer: A) Power

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Q:

The radius of curvature of a concave mirror is 30 cm. Following Cartesian Sign Convention, its focal length is expressed as

A) -30 cm B) -15 cm
C) +30 cm D) +15 cm
 
Answer & Explanation Answer: B) -15 cm

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