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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:

In how many ways the word 'SCOOTY' can be arranged such that 'S' and 'Y' are always at two ends?

A) 720 B) 360
C) 120 D) 24
 
Answer & Explanation Answer: D) 24

Explanation:

Given word is SCOOTY

ATQ,

Except S & Y number of letters are 4(C 2O's T)

Hence, required number of arrangements = 4!/2! x 2! = 4!

= 4 x 3 x 2

= 24 ways.

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Filed Under: Permutations and Combinations
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Q:

Which elements are malleable and good conductors of electricity?

A) tin and silver B) iodine and silver
C) tin and xenon D) iodine and xenon
 
Answer & Explanation Answer: A) tin and silver

Explanation:

Tin and Silver are malleable and good conductors of electricity. The other combinations have a non metal in them which are bad conductors.

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Filed Under: Physics
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Q:

Which of the following is a chemical property?

A) Reactivity B) Solubility
C) Density D) All of the above
 
Answer & Explanation Answer: A) Reactivity

Explanation:

The ability of two or more substances to combine to form other substances is called Reactivity.

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Filed Under: General Science
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Q:

Which three components are common to all amino acids?

Answer

Any two amino acids vary structure by the r-group, otherwise all amino acids are in the same structure. All amino acids have in common carboxyl group -COO , amino group -NH3+ and a hydrogen -H and a r-group which are all bonded to a central carbon.

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Subject: Chemistry Exam Prep: AIEEE , Bank Exams , GATE
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Q:

Which of the following statements about financial aid are true?

A) Financial aid is available to community college students. B) Most high school varsity sports team members will receive an athletic scholarship.
C) Elite, private colleges don't offer financial aid packages. D) Only children of unemployed parents can't qualify for financial aid.
 
Answer & Explanation Answer: A) Financial aid is available to community college students.

Explanation:
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Filed Under: Business Intelligence
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Q:

What is not a reason christian missionaries went to Asia?

Answer

To obtain exotic spices or to find trade items are not the reasons for christian missionaries went to Asia.

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Subject: World Geography Exam Prep: AIEEE , Bank Exams
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Q:

Floridian starch is characteristic energy storage material of which algae?

A) Blue green algae B) Brown algae
C) Red algae D) Green algae
 
Answer & Explanation Answer: C) Red algae

Explanation:

The floridian starch is reserve food materials in the red algae or the members of class Rhodophytae. It is a characteristic feature of this group.

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Filed Under: Biology
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