Questions

Q:

Dimond is

A) an element B) a compound
C) a mixture D) a liquid
 
Answer & Explanation Answer: A) an element

Explanation:
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Q:

Why are hydrocarbons insoluble in water?

Answer

We know that polar substances are soluble in polar solvents and non polar substances are soluble in non-polar solvents only. Here the hydrocarbons are non-polar molecular substances and water is a polar solvent. So water can't dissolve hydrocabons.


 


Hence, as hydrocarbons are non-polar substances, they are insoluble in water as it is a highly polar solvent. 

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Q:

How does the Sun get its energy

A) From gravitational pressure B) From nuclear fission
C) From nuclear fusion D) None of the above
 
Answer & Explanation Answer: C) From nuclear fusion

Explanation:
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Filed Under: World Geography

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Q:

Which of the following is not an Operating System?

A) Windows Vista B) Linux
C) Microsoft Office D) Apple's Mac OS
 
Answer & Explanation Answer: C) Microsoft Office

Explanation:
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Q:

The head quarters of World Trade Organisation(WTO) are at

A) Rome B) Geneva
C) Doha D) New York
 
Answer & Explanation Answer: B) Geneva

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Filed Under: Indian Economy

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Q:

Which statement about weak bonds is correct?

A) Covalent bonds are weak bonds B) They are hard to break
C) Weak bonds are transient and easily reversible. D) All of the above
 
Answer & Explanation Answer: C) Weak bonds are transient and easily reversible.

Explanation:

In chemistry, Weak bonds are those forces of attraction that, do not take a large amount of energy to break.

 

For example, hydrogen bonds are broken by energies in the order of 4 - 5 kcal/mol.

Ionic bonds, hydrogen bonds and van der Waals interactions are considered weak bonds.

 

Weak bonds are transient and easily reversible.

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Q:

The oldest form of composition of Hindustan Vocal music is

A) Thumri B) Ghazal
C) Dhrupad D) None of the above
 
Answer & Explanation Answer: C) Dhrupad

Explanation:
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Filed Under: Indian Culture
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Q:

Who invented Electrocardiograph(EKG)?

Answer

The EKG was invented by Willem Einthoven in 1903 and is used to monitor and analyze past and present heart activity in an individual.

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Subject: Inventions

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