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 Chemistry Questions

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Q:

In general the largest component of bog soils is

A) organic matter B) water
C) living organisms D) air
 
Answer & Explanation Answer: A) organic matter

Explanation:

A Bog soil is an intrazonal group of poorly drained dark peat or muck soils underlain by peat and developed under swamp or marsh types of vegetation.

The largest component of bog soils is organic matter.

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Q:

The Chemical formula of Urea is

A) (NH4)2CO2 B) (NH2)CO
C) (NH4)2CO D) (NH2)2CO
 
Answer & Explanation Answer: D) (NH2)2CO

Explanation:
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Q:

Which of the following is applied on the top of the matchsticks?

A) Red phosphorus B) White phosphorus
C) Potassium sulphate D) No option is correct
 
Answer & Explanation Answer: A) Red phosphorus

Explanation:
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Q:

Which metal is liquid at room temperature?

A) Bromine B) Chlorine
C) Mercury D) Cesium
 
Answer & Explanation Answer: C) Mercury

Explanation:

Mercury is the only metal that remains in liquid at room temperature.

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Q:

Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?

A) N2O B) AsH3
C) N2 D) C5H12
 
Answer & Explanation Answer: A) N2O

Explanation:
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Q:

The gases used in different types of welding would include

A) Acetylene B) Oxygen
C) Oxygen and Acetylene D) Nitrogen, Oxygen and Acetylene
 
Answer & Explanation Answer: C) Oxygen and Acetylene

Explanation:

Oxygen and Acetylene are the gases used in different types of welding.

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Q:

Which of the following is used as anaesthetics?

A) N2 B) N2O
C) CH4 D) CO2
 
Answer & Explanation Answer: B) N2O

Explanation:
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Q:

An element A forms an oxide with formula A3O4. What is the valency of element A?

A) 3 B) 2
C) 1 D) 4
 
Answer & Explanation Answer: D) 4

Explanation:
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