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Q:

Number of Sigma and Pi bonds in benzene, respectively is

A) 12 and 3 B) 3 and 3
C) 6 and 3 D) 9 and 3
 
Answer & Explanation Answer: A) 12 and 3

Explanation:
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Filed Under: Chemistry
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Q:

Which of the following is a mixture?

A) Water B) Air
C) Carbon dioxide D) Oxygen
 
Answer & Explanation Answer: B) Air

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Filed Under: Chemistry
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Q:

Which one of the following statements is correct?

A) The oxidation number for hydrogen is always zero. B) The oxidation number for hydrogen is always + 1.
C) The oxidation number for hydrogen is always -1. D) Hydrogen can have more than one oxidation number.
 
Answer & Explanation Answer: D) Hydrogen can have more than one oxidation number.

Explanation:

Hydrogen has two possible oxidation numbers: +1 and -1.

-1 in case of hydrides.

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Q:

Algal bloom results from

A) Global warming B) Salination
C) Eutrophication D) Biomagnification
 
Answer & Explanation Answer: C) Eutrophication

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Filed Under: Biology
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Q:

The basis of determining dearness allowance to employees in India is ____________

A) National Income B) Consumer Price Index
C) Standard of Living D) Inflation Rate
 
Answer & Explanation Answer: B) Consumer Price Index

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Filed Under: Indian Economy
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Q:

Which of the following is NOT based on principle of relationship between volume and pressure of air?

A) Fountain pen B) Bicycle pump
C) Hand pump D) Pulley
 
Answer & Explanation Answer: D) Pulley

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Filed Under: Physics
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Q:

The method of soil conservation in which different crops are grown in alternate rows and are sown at different times to protect the soil from rain wash is called?

A) Mulching B) Mulching
C) Rock dam D) Terrace farming
 
Answer & Explanation Answer: B) Mulching

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Filed Under: General Science
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Q:

A person who writes music -

A) Lyricist B) Composer
C) Musician D) Cinematograher
 
Answer & Explanation Answer: B) Composer

Explanation:

A composer is who writes music for a song whereas a lyricist is who writes lyrics (words) for a song.

 

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Filed Under: General Science
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