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, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

I had invited(A)/all my sister-­in-­laws(B)/to my son's birthday party.(C)/No error(D)

A) A B) B
C) C D) D
 
Answer & Explanation Answer: B) B

Explanation:
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Q:

In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect/Direct speech.
Rajesh ordered his driver to do as he was told.

A) Rajesh ordered his driver “Do as you are told”. B) Rajesh said to his driver “Do as I told you”.
C) Rajesh said to his driver “Do as you are told”. D) Rajesh said to his driver “Do as you were told”.
 
Answer & Explanation Answer: C) Rajesh said to his driver “Do as you are told”.

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.


This was enough ___________ the book store-owner-turned librarian Husain to asses its valuable contents. "The preface of the book read: 'painters __________ technical knowledge to paint, but lack to understand nature, ______________ they fail to create a masterpiece," points out Husain, adding, "All I ______________ in my life is about books and from books. The grand library ___________ the palace is a cache of knowledge."


The grand library ___________ the palace is a cache of knowledge.

A) from B) at
C) to D) off
 
Answer & Explanation Answer: B) at

Explanation:
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