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 Chemistry Questions

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Q:

Which of the following statements is Incorrect?

 

A) The particles of matter have spaces between them B) The particles of matter are extremely small
C) The particles of matter attract each other D) The particles of matter are in stationary state
 
Answer & Explanation Answer: D) The particles of matter are in stationary state

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Q:

By volume, 21% of air is _______________.

 

A) hydrogen B) oxygen
C) nitrogen D) carbon dioxide
 
Answer & Explanation Answer: B) oxygen

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Q:

Metals are generally ______.

I. Ductile

II. Malleable

III. Poor conductors of heat

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: A) Only I and II

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Q:

Which species is a conjugate acid of OH- ?

 

A) H+ B) O2- 
C) OH D) H2O
 
Answer & Explanation Answer: D) H2O

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Q:

Mass number is always equal to ______.

 

A) number of protons B) number of neutrons
C) sum of number of protons and number of electrons D) sum of number of protons and number of neutrons
 
Answer & Explanation Answer: D) sum of number of protons and number of neutrons

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Q:

Water which is suitable for drinking is called _______________ water.

 

A) hygienic B) sparkling
C) potable D) sanitary
 
Answer & Explanation Answer: C) potable

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Q:

Which of the following is NOT a waste material removed from blood in the kidney?

 

A) Ammonia B) Carbon dioxide
C) Urea D) Uric acid
 
Answer & Explanation Answer: B) Carbon dioxide

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Q:

What is the general formula of alkenes?

 

A) CnH2n B) CnH2n+2
C) CnH2n-2 D) CnH2n-1
 
Answer & Explanation Answer: A) CnH2n

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