Questions

Q:

Change in focal length of eye lens is caused by

A) ciliary muscles B) iris
C) pupil D) retina
 
Answer & Explanation Answer: A) ciliary muscles

Explanation:
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Q:

The PCl5 molecule has trigonal bipyramidal structure. Therefore,the hybridization of p orbitals should be

A) sp2 B) sp3
C) dsp2 D) dsp3
 
Answer & Explanation Answer: D) dsp3

Explanation:

The P atom needs five orbitals to form the five P-Cl bonds. It has a 3s and three 3p orbitals, so it must use one of its 3d orbitals to form the fifth bond. These orbitals are hybridized to form five sp3d orbitals that just happen to point in the right directions to form a trigonal bipyramid.

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Q:

Which describes how mRNA is used by a cell?

A) It is used to move information to other cells. B) It is used to check DNA for mutations.
C) It is used to replicate DNA for mitosis. D) It is used to transfer genetic information.
 
Answer & Explanation Answer: D) It is used to transfer genetic information.

Explanation:

A RNA copy of a DNA gene is called as messenger RNA or mRNA. mRna is used in translation because information is translated from one language (nucleotides) into another (amino acids).

 

Hence, mRNA is used to transfer genetic information by a cell.

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Q:

As per the decision of the GST Council, e-Way Bill system has been rolled out from

A) 1st March 2018 B) 1st April 2018
C) 1st May 2018 D) 1st January 2018
 
Answer & Explanation Answer: B) 1st April 2018

Explanation:

As per the decision of the GST Council, e-Way Bill system has been rolled out from 1st of April this year (2018).

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Q:

'Khazanah' is the state-owned investment holding arm of which country?

A) Singapore B) Japan
C) Mauritius D) Malaysia
 
Answer & Explanation Answer: D) Malaysia

Explanation:
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Q:

How does the AdWords system decide which ad language to target?

Answer

Language of ads is determined by the language setting of the Google interface the client is using.

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Q:

Which one of the following is the highest altitude zoo in the world?

A) Cheyenne Mountain Zoo B) Pandit G. B. Pant High Altitude Zoo
C) Himalayan Zoological park, Gangtok D) Padmaja Naidu Himalayan Zoological Park
 
Answer & Explanation Answer: D) Padmaja Naidu Himalayan Zoological Park

Explanation:

Cheyenne Mountain Zoo  -  6,800 feet

Himalayan Zoological Park, Gangtok  -  5839.895 feet

Padmaja Naidu Himalayan Zoological Park  -  7000 feet

 

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Q:

Which equation is an example of a synthesis reaction?

A) 2H2 + O2 → 2H2O B) Na + Cl → NaCl
C) HA + BOH → H2O + BA D) NaCl + AgNO3 → NaNO3 + AgCl
 
Answer & Explanation Answer: B) Na + Cl → NaCl

Explanation:

When two or more chemical species combine to form a single product, the reaction is said to be synthesis reaction. It is also called as Direct Combination reaction.

 

Here in the given options, Sodium (Na) combines with Chlorine (Cl) to form a more complex single product Sodium Chloride (NaCl).

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