Questions

Q:

Prof. Amartya Sen has earned worldwide distinction in which of the following fields/areas

A) Economics B) Geology
C) Biochemistry D) Astrophysics
 
Answer & Explanation Answer: A) Economics

Explanation:
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Q:

Which acid is produced when milk gets sour?

A) Lactic acid B) Acetic acid
C) Tartaric acid D) Butyric acid
 
Answer & Explanation Answer: A) Lactic acid

Explanation:
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Q:

A benefit of using Service Design tools is?

A) To help ensure that events are detected as quickly as possible B) To help ensure that standards and conventions are followed
C) To help enable different applications to work together D) To help implement architectures that support the business strategy
 
Answer & Explanation Answer: B) To help ensure that standards and conventions are followed

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Q:

Bachendri Pal became famous for her grand success in the field of

A) Athletics Skiing B) Swimming
C) Mountaineering D) Journalism
 
Answer & Explanation Answer: D) Journalism

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Q:

Select the synonym of

eccentric

 

A) whimsical B) chronic
C) bona fide D) typic
 
Answer & Explanation Answer: A) whimsical

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Q:

Which of the following is NOT correct?

 

A) Tenth Plan : 2002-07 B) Third Plan : 1966-71
C) First Plan : 1951-56 D) Sixth Plan : 1980-85
 
Answer & Explanation Answer: B) Third Plan : 1966-71

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Q:

The freezing point of water at 760mm pressure is

A) 0 K B) 273 K
C) 273 C D) -273 C
 
Answer & Explanation Answer: B) 273 K

Explanation:

K is degree kelvin

Zero K corresponds to -273  K = C + 273

The freezing point of water being 0 C, on the kelvin scale it is 0 C + 273 K

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Q:

What is the conjugate base of H2O?

A) NH3+ B) OH-
C) H2O D) All the above
 
Answer & Explanation Answer: B) OH-

Explanation:

A conjugate acid, is a species formed by the reception of a proton (H+) by a base—in other words, it is a base with a hydrogen ion added to it.

On the other hand, a conjugate base is what is left over after an acid has donated a proton during a chemical reaction. Hence, a conjugate base is a species formed by the removal of a proton from an acid.

Because some acids are capable of releasing multiple protons, the conjugate base of an acid may itself be acidic.

Represented as the following chemical reaction:

Acid + Base ⇌ Conjugate Base + Conjugate Acid

 

The water molecule is the conjugate acid of the hydroxide ion after the latter received the hydrogen proton donated by ammonium. On the other hand, ammonia is the conjugate base for the acid ammonium after ammonium has donated a hydrogen ion towards the production of the water molecule. We can also refer to OH- as a conjugate base of H2O, since the water molecule donates a proton towards the production of NH+4 in the reverse reaction, which is the predominating process in nature due to the strength of the base NH3 over the hydroxide ion.

 

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