Questions

Q:

Why does'nt the hydrogen atom emit X-rays?

A) It is very small in size B) It has only one electron
C) Its energy levels are very close to each other D) it is highly electropositive
 
Answer & Explanation Answer: C) Its energy levels are very close to each other

Explanation:

For an atom to emit X-rays it should have difference in energy levels

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Filed Under: Physics

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Q:

Minute hand overlaps hour hand in 65 mins. In how many days it will gain 1440 hours ?

A) 57 days B) 58 days
C) 60 days D) 61 days
 
Answer & Explanation Answer: C) 60 days

Explanation:

In this problem , it has considered that 65 mins = 1hr
So mins has increased by 5 mins so multiply 5 x 24 = 120 mins extra ,
That is now per day it adds 2hr extra, so divide 1440/26 = 59.384 days =~ 60 days.

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Filed Under: Clock puzzles
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38 6735
Q:

Light year is a unit of

A) time B) speed of light
C) distance D) mass
 
Answer & Explanation Answer: C) distance

Explanation:
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Filed Under: Physics

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Q:

That which cannot be conquered -

A) Reticent B) Insolvent
C) Venial D) Invincible
 
Answer & Explanation Answer: D) Invincible

Explanation:

That which cannot be conquered is called as Invincible.

One who speaks less is called as Reticent.

A pardonable offence is called as Venial.

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Filed Under: English
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2 6731
Q:

Who has won the men's singles title at the 82nd Senior National Championship?

A) H S Prannoy B) Ashwini Kumar
C) Rakesh Kumar D) Kidambi Srikanth
 
Answer & Explanation Answer: A) H S Prannoy

Explanation:

H S Prannoy has won the men’s singles title at the 82nd Senior National Championship Senior National Badminton Championships in Nagpur, Maharashtra on November 8, 2017. He defeated higher ranked Kidambi Srikanth in the final by 21- 15, 16- 21, 21-7.

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Filed Under: Sports
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21 6728
Q:

I am the first on Earth, the second in Heaven. I appear two times in a week you can only see me once in a year. Although I am in the middle of the sea, l am not found in month, but l am in February, June, September, October, November & December.

Who am I?

Answer

The letter 'E'.


As of the above given data,


It is in the 1st place in Earth, 2nd in Heaven and in the middle of the Sea.


It appears once in a Year and twice in a Week.


It is present in February, June, September, October, November & December.


But not in the Month.


 


Hence, it is the letter 'E'.

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18 6726
Q:

Which Indian athlete was the flag bearer for the Indian contingent in the 22nd Asian Athletics Championship (AAC)-2017 ?

A) Srabani Nanda B) Jitu Rai
C) Tintu Luka D) Dipa Karmakar
 
Answer & Explanation Answer: C) Tintu Luka

Explanation:

The 22nd edition of Asian Athletics Championships (AAC) has started at Kalinga Stadium in Bhubaneswar, Odisha on July 6, 2017 and will continue till July 9, 2017. Athlete Tintu Luka was the flag bearer for the Indian contingent which received a rousing welcome from the crowd. Odia athlete Srabani Nanda had the honour of taking the oath on behalf of athletes at the inaugural ceremony. Over 1,200 athletes and officials from 43 countries in Asia witnessed the largest sporting event. The official mascot of the Championship is “Olly Turtle” that represents the famous Olive Ridley sea turtle.

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Filed Under: General Awareness
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Q:

Water is a compound because it?

A) it contains two different elements joined by chemical bond B) it contains hydrogen & oxygen
C) it exists as solid, liquid or gas D) it cannot be split up into simpler substances by chemicals means
 
Answer & Explanation Answer: A) it contains two different elements joined by chemical bond

Explanation:

We know that All compounds are molecules, but not all molecules are compounds.

Water is a molecule because it is made from atoms that have been chemically combined. It is also a compound because the atoms that make water are not all the same - some are oxygen and some are hydrogen.

 

Hence, Water is a molecule and a compound.

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Filed Under: General Science
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