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Q:

Methane contributes towards global warming so it is called a _________________ gas.

 

A) poisonous B) carcinogenic
C) infectious D) greenhouse

Answer:   D) greenhouse



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
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Permanent hardness of water is due to the presence of  ? 

A) Calcium sulphate B) Calcium bicarbonate
C) Sodium bicarbonate D) Magnesium bicarbonate
 
Answer & Explanation Answer: A) Calcium sulphate

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Select the correct statement (s).

A) When energy is transferred to the system from the surrounding as work, the surrounding do work on the system and the value of work (W) positive. B) When energy is transferred from the system to the surrounding as work, work is done on the surrounding and the value of W is negative.
C) Both (A) and (B) D) None of the above
 
Answer & Explanation Answer: C) Both (A) and (B)

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Triple point of water corresponds to

A) 1 atm, 0°C B) 1 atm, 0.01°C
C) 1 atm, 0 K D) 4.58 Torr, 0.01°C
 
Answer & Explanation Answer: D) 4.58 Torr, 0.01°C

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Which one of the following can be oxidised to the corresponding carbonyl compound:

A) 2-methyl-2-hydroxy propane B) 2-hydroxy propane
C) o-Nitrophenol D) Phenol
 
Answer & Explanation Answer: B) 2-hydroxy propane

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Ethanol is converted into ethoxy ethane,

A) by heating excess of ethanol with conc. H2SO4 at 140°C B) by treating with conc. H2SO4 at room temperature
C) by treating with conc. H2SO4 at 273 K D) by heating Ethanol with excess of conc. H2SO4 at 443 K
 
Answer & Explanation Answer: A) by heating excess of ethanol with conc. H2SO4 at 140°C

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Q:

What is the third most common gas found in the air we breathe ?

A) Argon B) Neon
C) Carbondioxide D) Hydrogen
 
Answer & Explanation Answer: A) Argon

Explanation:

The most common gas people breathe from clean air is nitrogen. Air is a mixture of gases, and the air on Earth contains about 78 percent nitrogen and about 21 percent oxygen. Argon, carbon dioxide neon, helium, methane, krypton, hydrogen and xenon are in much smaller amounts.

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Recycled plant matter is known as ?

A) Decomposed B) Carbide
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Answer & Explanation Answer: C) Compost

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Leakage of which of the following gases caused the Bhopal gas tragedy ?

A) Carbon monoxide B) Methyl isocyanate
C) Nitrous oxide D) Hydrogen sulphide
 
Answer & Explanation Answer: B) Methyl isocyanate

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