Questions

Q:

Which one of the following elements will be an isobar of calcium if the atomic number of calcium is 20 and its mass number is 40?

 

A) Element with 18 neutrons and 20 protons  B) Element with 19 neutrons and 18 protons 
C) Element with 19 neutrons and 20 protons  D) Element with 18 neutrons and 22 neutrons
 
Answer & Explanation Answer: D) Element with 18 neutrons and 22 neutrons

Explanation:
Isobar: one of two or more atoms having equal atomic weights but different atomic numbers.
 
                    Mass number     Electrons      Neutrons
    Calcium            40                    20                 20
 
     Argon              40                    18                 22
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Filed Under: Chemistry
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Q:

In which year a new “Liberalized Industrial Policy” in India was announced for the first time?

A) 1991 B) 1992
C) 1986 D) 1993
 
Answer & Explanation Answer: A) 1991

Explanation:
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Filed Under: Indian History
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Q:

Male is the Capital of ___________.

A) Algeria B) Maldives
C) Kenya D) Mauritius
 
Answer & Explanation Answer: B) Maldives

Explanation:
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Filed Under: Country Capitals
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Q:

Who wrote the English Bill of Rights?

A) Parliament of England B) King James II
C) Mary II D) None of the above
 
Answer & Explanation Answer: A) Parliament of England

Explanation:

The Bill of Rights, also known as the English Bill of Rights, is an Act of the Parliament of England that sets out certain basic civil rights and clarifies who would be next to inherit the Crown.

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Q:

Why paging is used?

Answer

Paging is solution to external fragmentation problem which is to permit the logical address space of a process to be noncontiguous, thus allowing a process to be allocating physical memory wherever the latter is available.

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Q:

Which period in history, is known as '100 days'?

Answer

The interval of time between Napoleon's escape from Elba and his abdication after the Battle of Waterloo

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Subject: World History

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Q:

Which one of the following elements is used as a timekeeper in atomic clocks?

A) Potassium B) Caesium
C) Calcium D) Magnesium
 
Answer & Explanation Answer: B) Caesium

Explanation:

When exposed to certain frequencies of radiation, such as radio waves, the subatomic particles called electrons that orbit an atom's nucleus will "jump" back and forth between energy states. Clocks based on this jumping within atoms can therefore provide an extremely precise way to count seconds.It is no surprise then that the international standard for the length of one second is based on atoms. Since 1967, the official definition of a second is 9,192,631,770 cycles of the radiation that gets an atom of the element called caesium to vibrate between two energy states.

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Filed Under: Chemistry
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Q:

Select the word with the correct spelling.

A) arobics B) chosers
C) batered D) eternity
 
Answer & Explanation Answer: D) eternity

Explanation:
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Filed Under: English
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