Questions

Q:

Under which conditions are gases most soluble in water?

A) low pressure and low temperature B) low pressure and high temperature
C) high pressure and low temperature D) high pressure and high temperature
 
Answer & Explanation Answer: C) high pressure and low temperature

Explanation:

Henry's Law tells that the solubility of a gas is directly proportional to the partial pressure of the gas above the solvent. Hence under high pressure, more gas is dissolved.

Also that Henry's Law involves a constant which is temperature-dependent. Under high temperatures, less gas is dissolved whereas under low temperatures, more gas is dissolved.

 

For Example ::  

You can think of a can of soda. The contents are under pressure and if you shake the can before opening, the soda fizzes out all over as you open it. So the higher the pressure, the more gas or more CO2 can be dissolved in the drink.

Eliminate choices 1 and 2. Now focus on the temperature. Soda goes flat (loses carbonation or gas) as it warms up. Soda is usually served cold because more of the carbonation or CO2 stays in the drink when the soda is cold.

 

Hence, in high pressure and low temperature conditions gases are most soluble in water.

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Filed Under: Chemistry
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Q:

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

Explanation:
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Q:

Analytical Engine was invented by

A) Dewar B) Charles Babbage
C) Daimler D) None of these
 
Answer & Explanation Answer: B) Charles Babbage

Explanation:
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Filed Under: Inventions

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Q:

The First Five Year Plan was based on ___________.

A) Herold Domar Model B) P.C . Mahalanobis Model
C) Both the Above D) None of the above
 
Answer & Explanation Answer: A) Herold Domar Model

Explanation:
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Filed Under: Indian Economy
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9 5733
Q:

The flow of information through MIS is

A) organization dependent B) information dependent
C) management dependent D) need dependent
 
Answer & Explanation Answer: D) need dependent

Explanation:

The flow of information through MIS - Management Information System is Need dependent.

The backbone of any organization is Information. The information of MIS comes from both internal and external sources.

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Q:

A DVD is an example of

A) Optical Disc B) Hard Disc
C) Output Device D) Solid state storage device
 
Answer & Explanation Answer: A) Optical Disc

Explanation:

A DVD is an example of Optical Disc.

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Q:

The Legislature of the USA is known as the 

A) Commons B) Congress
C) Parliament D) Senate
 
Answer & Explanation Answer: B) Congress

Explanation:

The US Congress consists of two bodies 

a) the Senate and   b) the House of Representatives. The Senate, composed of 100 members (two Senators from each State), is a powerful body and exercises a very real influence in national affairs.

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Filed Under: Indian Politics

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Q:

What animal has the highest blood pressure?

A) Elephant B) Giraffe
C) Lion D) Rabbit
 
Answer & Explanation Answer: B) Giraffe

Explanation:

Giraffe has the highest blood pressure among animals. 

This is due to the fact that there is a large pressure drop (~100 mmhg) as the blood is transported from the heart, up the neck, to the brain. This is about twice the normal blood pressure of humans (120/80 mmhg).

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Filed Under: Animals and Birds
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