Questions

Q:

D.D.T. was invented by

A) Paul Muller B) John Dalton
C) Rudolf D) None of these
 
Answer & Explanation Answer: A) Paul Muller

Explanation:

Swiss chemist Paul Hermann Muller discovered DDT (dichloro-diphenyl-trichloroethane) noted its effectiveness as a pesticide during World War II to control malaria and typhus among civilians and troops, a discovery that earned him a Nobel Prize in 1948.

 

It was first synthesized in the year 1874.

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Q:

What is the heat released by a heating filament rated 20 W when it is kept on for 2 seconds?

 

A) 40 B) 10
C) 80 D) 20
 
Answer & Explanation Answer: A) 40

Explanation:
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Q:

The 2017 Indian Premier League (IPL 2017) first match on 5 April, 2017 was held in ?

A) Banglore B) Delhi
C) Hyderabad D) Kolkata
 
Answer & Explanation Answer: C) Hyderabad

Explanation:

The 2017 Indian Premier League is scheduled to start on 5th April 2017 and finish on 21 May 2017. The opening match and the final will be played at the Rajiv Gandhi International Cricket Stadium in Hyderabad.

The first match was between Sun Risers Hyderabad and Royal Challengers Banglore.

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Q:

Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?

A) 25 W B) Both
C) 100 W D) Neither
 
Answer & Explanation Answer: A) 25 W

Explanation:

Resistances of both the bulbs are

 

R1=V^2/P1 = 220^2/25

 

R2 = V^2/P2 = 220^2/100

 

Hence  R1gt ; R2

 

When connected in series, the voltages divide in them in the ratio of their resistances. The voltage of 440 V devides in such a way that voltage across 25 w bulb will be more than 220 V. Hence 25 w bulb will fuse.

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Filed Under: Physics
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Q:

An advanced water management system of Harappan times has been unearthed at

A) Dholavira B) Lothal
C) Kalibangan D) Alamgirpur
 
Answer & Explanation Answer: A) Dholavira

Explanation:
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Q:

Which one of the following is applicable to collision-coalescence process of precipitation?

 

A) Clouds which do not extend beyond the freezing level B) Clouds which extend beyond the freezing level
C) All types of clouds D) Cirrocumulus cloud
 
Answer & Explanation Answer: A) Clouds which do not extend beyond the freezing level

Explanation:

In colder clouds: droplets formed by Bergeron mechanism. But, in many parts of the world the air is too warm for ice crystals to form. This being the case, rain and snow cannot develop following the Bergeron Process. Instead, tiny droplets form as they collide into one another creating larger and larger droplet, this is known as collision-coalescence process. So, warmer clouds are associated with this keyword.

 

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Q:

Which of the following statementsregarding the Constituent Assembly of India is/are correct?

1.The Assembly was elected indirectly by the members of the Provincial Legislative Assemblies.

2.The elections were held on the basis of Universal Adult Franchise.

3.The scheme of election was laid down by the Cabinet delegation.

4.The distribution of seats was done on the basis of the Mountbatten plan.

 

Select the correct answer using the code given below.

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

Explanation:

In India, the Universal Adult Franchise was introduced only in the post-independence period during the first general elections to the Lok Sabha and the State Assemblies.

Under the Cabinet Mission Plan of 1946, elections were held for the first time for the Constituent Assembly.

Constituent Assembly members were elected indirectly by members of the newly elected provincial assemblies, and initially included representatives for those provinces that formed part of Pakistan (some of which are now in Bangladesh).

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Q:

The ratio of cost price and marked price of an article is 2:3 and ratio of percentage profit and percentage discount  is 3:2 . what is the discount percentage?

A) 16.66% B) 20%
C) 25% D) 33.33%
 
Answer & Explanation Answer: A) 16.66%

Explanation:

     CP : MP = 2x : 3x

 => Profit = x

 

( %) profit : (%) discount = 3:2

 

Let  CP = 2000,  SP = 300

 

But  3x100×200 + 2x100×300 = 100

 

=>  x = 8.33%

 

Discount 2x = 16.66% 

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