Questions

Q:

Rain drops acquire spherical shape due to 

A) viscosity B) surface tension
C) friction D) elasticity
 
Answer & Explanation Answer: B) surface tension

Explanation:

The Surface tension pulls the surface of the drop equally at all points thus produces the spherical shape having the minimum surface area. This surface tension is the "skin" of a body of water that makes the molecules stick together.

                                 Rain_drops_acquire_spherical_shape_due_to1558074071.png image 

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Q:

Rearrange the parts of the sentence in correct order

Ever since
P : outbreaks have been an annual occurrence
Q : Indian shores during the 2009 pandemic,
R : the influenza virus, H1N1 landed on

 

A) PQR B) RPQ
C) QRP D) RQP
 
Answer & Explanation Answer: D) RQP

Explanation:
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Q:

An ionic bond involves _____.

 

A) the sharing of a single pair of electrons B) an attraction between ions of opposite charge
C) the unequal sharing of an electron pair D) water avoidance
 
Answer & Explanation Answer: A) the sharing of a single pair of electrons

Explanation:

In ionic bonding, the atoms are bound by attraction of oppositely charged ions, whereas, in covalent bonding, atoms are bound by sharing electrons to attain stable electron configurations.

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Filed Under: Chemistry
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Q:

With reference to earthquakes, which of the following statements are correct?

A. Earthquakes largely occur along the converging plate boundaries.

B. Point of origin of earthquake in lithosphere is known as focus/hypocenter.

C. Intensity of earthquake decreases with distance from the epicenter.

D. Epicentre of earthquake always remains over continents only.

Select the correct answer using the code given below.

A) 1 and 2 only B) 1, 2 and 3
C) 2 and 3 only D) 1 and 4
 
Answer & Explanation Answer: B) 1, 2 and 3

Explanation:

Epicentre of Earthquakes can be over both oceanic and continental surface. Epicentres above oceanic surface are cause of tsunamisof large intensity. Anearthquake's hypocentreis the position where the strain energy stored in the rockis first released, marking thepointwhere the fault begins to rupture.

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Q:

The largest southern most single Island in India is

A) Rameswaram Island B) Minicoy Island
C) Car Nicobar Island D) Great Nicobar Island
 
Answer & Explanation Answer: D) Great Nicobar Island

Explanation:
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Q:

Improve the given sentence if necessary.

He decided to take the help of a guide lest he may miss the way.

A) he should miss  B) he will miss
C) he might fail to see D) No improvement
 
Answer & Explanation Answer: A) he should miss 

Explanation:

‘Lest’ is always followed by ‘Should’, as it is used to express a purpose. Thus, the correct formation would be, ‘He decided to take the help of a guide lest he should miss the way’.

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Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives.


Manja, or the glass-coated string used for flying kites, not only poses threat to humans, animals and birds but also to trees. A study by the country's oldest botanical garden has revealed that it poses a great threat to trees. But how can a snapped string struck in a tree kill the tree? Apparently, it does so by allying with the creepers in the garden.


A research paper by three scientists of the Acharya Jagdish Chandra Bose Indian Botanic Garden, located in West Bengal's Howrah district, illustrates in detail how the manja, in collusion with climbers, does the damage. "The abandoned, torn kite strings act as an excellent primary supporting platform for the tender climbers, giving easy passage to reach the top of the trees. Lateral branches from the top of the climber and other accessory branches from the ground reaches the top taking support of the first climber, completely covers the treetop, thus inhibiting the penetration of sunlight," says the research paper.


Abandoned, torn kite strings stuck in trees benefits whom?

 

A) Humans B) Creepers
C) Birds D) Trees
 
Answer & Explanation Answer: B) Creepers

Explanation:
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Q:

A number of cats got together and decided to kill between them 999919 rats. Every cat killed an equal number of rats. Each cat killed more rats than there were cats. How many rats do you think that each cat killed ?

A) 1009 B) 991
C) 2000 D) 1000
 
Answer & Explanation Answer: A) 1009

Explanation:

Given total number of rats = 999919

 

999919 = 1000000 - 81 = 10002 - 92 = (1000+9)(1000-9) = 1009 x 991.
Since there were more rats than there were cats, 991 cats killed 1009 rats each.

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