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 Chemistry Questions

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Q:

The Chemical formula of Ammonium sulphate is

A) NH4SO4 B) (NH4)2SO3
C) NH4SO3 D) (NH4)2SO4
 
Answer & Explanation Answer: D) (NH4)2SO4

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0 1989
Q:

Metals reacts with acids to give:

A) a salt and chlorine B) a salt and hydrogen
C) a salt and water D) a salt and base
 
Answer & Explanation Answer: B) a salt and hydrogen

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0 1986
Q:

Which among the following is an endothermic reaction?

A) Respiration B) Combustion
C) Sweating D) Burning of natural gas
 
Answer & Explanation Answer: C) Sweating

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0 1985
Q:

A change in which a substance undergoes a change in its physical properties is called _____________.

A) Chemical Properties B) Physical Properties
C) Chemical Change D) Physical Change
 
Answer & Explanation Answer: D) Physical Change

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1 1977
Q:

The most pure form of carbon among the options is

A) Anthracite B) Lampblack
C) Graphite D) Wood Charcoal
 
Answer & Explanation Answer: A) Anthracite

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0 1974
Q:

If the atomic number of Krypton is 36, then its electronic configuration is:

A) 2,8,18,8 B) 2,8,20,6
C) 2,18,16 D) 2,18,8,8
 
Answer & Explanation Answer: A) 2,8,18,8

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0 1971
Q:

The common name of sulphur is

A) Freon B) galena
C) lime D) brimstone
 
Answer & Explanation Answer: D) brimstone

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1 1971
Q:

Which of the following gases is not generated in a biogas plant?

A) H2S B) CO2
C) CH4 D) CO
 
Answer & Explanation Answer: D) CO

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1 1967