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Q:

Air expands when it _______________.

A) is cooled B) is heated
C) is under pressure D) becomes more humid
 
Answer & Explanation Answer: B) is heated

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Q:

Pressure cooker cooks rice faster because

A) it always lets the steam escape B) high pressure raises the boiling point of water
C) high pressure crushes the hard covering of rice grains D) it does not let the heat energy escape easily
 
Answer & Explanation Answer: B) high pressure raises the boiling point of water

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Q:

In a streamline flow, ________ at every point in the fluid remains same.

A) force B) pressure
C) pressure D) speed
 
Answer & Explanation Answer: C) pressure

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Q:

Assuming that the charge of an electron is 1.6 x 10-19 C, the number of electrons passing through a section of wire per second when the wire carries a current of 1 A is

 

 

 

A) 6.25 x 1018 C B) 1.6 x 10-19 C
C) 1.6 x 1019 C D) 0.625 x 1017 C
 
Answer & Explanation Answer: A) 6.25 x 1018 C

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Q:

Carcinogenic chemicals cause

A) Heart diseases B) Diabetes
C) Cancer D) Asthma
 
Answer & Explanation Answer: C) Cancer

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Q:

When a chromosome undergoes a deletion mutation information is

A) Repeated B) Lost
C) Reversed D) Transferred
 
Answer & Explanation Answer: B) Lost

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Q:

_____ is the major component of natural gas.

A) Acetone B) Methane
C) Chlorine D) Hexane
 
Answer & Explanation Answer: B) Methane

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Q:

The poisonous gas accidentally released in Bhopal Gas Tragedy is

A) Methane B) Nitrous Oxide
C) Methyl Isocyanate D) Cyanogen
 
Answer & Explanation Answer: C) Methyl Isocyanate

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