Questions

Q:

Propyne and propene can be distinguished by

A) AgNO₃ in ammonia B) conc. H₂SO₄
C) dil. KMnO₄ D) Br₂ in CCl₄
 
Answer & Explanation Answer: A) AgNO₃ in ammonia

Explanation:

Propene, being an alkene, and propyne, being a alkyne, are distinguished using the common chemical tests namely ammoniacal silver nitrate or ammoniacal cuprous chloride. Ammoniacal silver nitrate is also called as Tollen's reagent.

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Q:

In the following passage some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.


The _____ of energy in India are met from both commercial and non commercial sources. The most _____ sources of energy today are coal and natural gas, hydro
electricity and nuclear power. On the other hand, firewood, cow-dung cakes and vegetable waste etc. _____ non commercial forms of energy. While non commercial
forms of energy _____ demand, coal is the _____ source of commercial energy in India.


coal is the _____ source of commercial energy in India. 

A) smallest B) hardest
C) largest D) heaviest
 
Answer & Explanation Answer: C) largest

Explanation:
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Q:

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case noimprovement is needed, select "no improvement".

Opening the door to her each morning is like (lets) a breath of fresh air into my world.

A) let B) to let
C) letting D) no improvement
 
Answer & Explanation Answer: C) letting

Explanation:
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Q:

Which of the below options is called a laughing gas?

A) N2O B) CO2
C) H2O D) SO2
 
Answer & Explanation Answer: A) N2O

Explanation:
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Q:

Which of the following is used in the preparation of tincture iodine, cough syrup and many tonics?

A) Methanol B) Ethanoic acid
C) Acetic acid D) Ethanol
 
Answer & Explanation Answer: D) Ethanol

Explanation:
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Q:

In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one, which best expresses the same sentence in Passive/Active voice.

 

They are going to watch a drama tomorrow.

 

A) A drama is going to be watched by them tomorrow. B) A drama will be watched by them tomorrow.
C) A drama was going to be watched by them tomorrow. D) Tomorrow the drama is going to be watched by them.
 
Answer & Explanation Answer: A) A drama is going to be watched by them tomorrow.

Explanation:
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Q:

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

 

All this suggests the intimate relations which exist between history, politics, and sociology. The ____________ thing, however, is not the identities but the distinctions.For, however much the _____________ disciplines may, in practice, overlap, it is necessary ________ the sake of clear thinking to have their limits defined. As far _______sociology and history are concerned the differences may be summed up in a word. __________ history and sociology are concerned with the life of man as man.

 

sociology. The ____________ thing, however,

 

A) important B) importance
C) importances D) importantly
 
Answer & Explanation Answer: A) important

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Q:

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

 

A bad patch

 

A) A potholed road B) A medical bandage
C) A period of difficulty D) Shoddy repair work
 
Answer & Explanation Answer: C) A period of difficulty

Explanation:
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