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Q:

Permanent Hardness of water can be removed by adding

A) Bleaching powder B) Chlorine
C) Wasshing soda D) Potassium permanganate
 
Answer & Explanation Answer: C) Wasshing soda

Explanation:

Hardness can be removed by adding sodium carbonate (washing soda) or by passing the water through an ion-exchange column.

 

Hardness in water is caused by dissolved magnesium ions and calcium ions. These can get into the water when it comes into contact with limestone and other rocks that contain calcium compounds. This can happen, for example, when rainwater flows over these rocks on its way to a reservoir.

 

Hardness in water is of two types. They are :

1. Temporary hardness

2. Permanent hardness

 

1. Temporary hardness:: Temporary hardness is caused by dissolved calcium hydrogen carbonate.


2. Permanent hardness:: Permanent hardness is caused by dissolved calcium sulfate. Unlike temporary hardness, it is not removed by boiling the water.

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Filed Under: Chemistry
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Q:

Rearrange the parts of the sentence in correct order.

 

P: His story symbolizes a lifestyle struggle against apartheid in South Africa.
Q: 'Nelson Mandela' was born on July 18th, 1918 in the village of Mvezo in Umtata, then a part of South Africa's Cape Province.
R: It was a terrible form of institutionalized racism that held the South African society in it's grip for a long time.
S: It was not easy for Mandela to fight against it, as he too was among those who were oppressed by the system.

A) QPSR B) QRSP
C) QPRS D) PRSQ
 
Answer & Explanation Answer: C) QPRS

Explanation:
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Exam Prep: Bank Exams

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Q:

Which one of the following is not a true fish?

A) Silver fish B) Saw fish
C) Hammer fish D) Sucker fish
 
Answer & Explanation Answer: D) Sucker fish

Explanation:
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Q:

A person who speaks many languages

 

A) Polyglot B) Linguist
C) Bilingual D) Monolingual
 
Answer & Explanation Answer: A) Polyglot

Explanation:

Polyglot - A person who knows or speaks many languages.

Linguist - A person who speaks  foreign languages.

 

 

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Q:

Improve the bracketed part of the sentence.

It is revealing that the gender divide in cognition levels worsens with rise in age, as girls are often compelled to (drop in) of school for a variety of reasons.

A) drop at B) drop out
C) drop of D) No improvement
 
Answer & Explanation Answer: B) drop out

Explanation:
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Q:

Two Fathers and Two Sons Riddle

Two fathers and two sons sat down to eat eggs for breakfast. They ate exactly three eggs, each person had an egg. The riddle is for you to explain how

Answer

one of the 'fathers' is also a grandfather. Therefore the other father is both a son and a father to the grandson. In other words, the one father is both a son and a father.

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Subject: Math Puzzles

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Q:

B.C.Roy Award is given in the field of

A) Journalism B) Medicine
C) Music D) Environment
 
Answer & Explanation Answer: B) Medicine

Explanation:
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Filed Under: Honours and Awards

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Q:

Part IV of Constitution of India deals with

A) Fundamental Rights B) Citizenship
C) Directive Principles of state Policy D) Union Executive
 
Answer & Explanation Answer: C) Directive Principles of state Policy

Explanation:

Part_IV_of_Constitution_of_India_deals_with1556274385.jpg image

 

Part IV of Constitution of India deals with Directive Principles of state Policy.

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Filed Under: Indian Politics
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