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 Chemistry Questions

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Q:

The atoms of Germanium, Arsenic, Selenium and Bromine contain ...... shells.

A) 3 B) 7
C) 5 D) 4
 
Answer & Explanation Answer: D) 4

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0 2043
Q:

The absolute zero is a temperature at which _______

A) molecular motion in a gas would cease B) water freezes
C) all gases become liquid D) all gases become solid
 
Answer & Explanation Answer: A) molecular motion in a gas would cease

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Q:

How many elements are present in the group of the 18th Modem Periodic Table?

A) 5 B) 2
C) 6 D) 7
 
Answer & Explanation Answer: D) 7

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0 2040
Q:

Turquoise is an ore/mineral of

A) Copper B) Manganese
C) Mercury D) Tin
 
Answer & Explanation Answer: A) Copper

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0 2039
Q:

Kidney stones are composed of ______.

A) Calcium Oxalate B) Sodium Chloride
C) Magnesium Nitrate D) Calcium Bicarbonate
 
Answer & Explanation Answer: A) Calcium Oxalate

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0 2038
Q:

The most serious air pollutant causing health hazard is

A) Sulphur dioxide B) Carbon monoxide
C) Ozone D) Nitrogen oxide
 
Answer & Explanation Answer: A) Sulphur dioxide

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Q:

Methane an air pollutant is produced ______.

A) by action of ultraviolet light on nitrogenous compounds. B) as a by-product of manufacturing ammoniacal fertilizers
C) by burning of coal in insufficient air D) by digestion of food by animals
 
Answer & Explanation Answer: D) by digestion of food by animals

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1 2035
Q:

Bauxite is used as raw material by which industry

A) Aluminium B) Iron
C) Steel D) Gold
 
Answer & Explanation Answer: A) Aluminium

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1 2030