Bank PO Questions


Q:

What occurs when an atom loses an electron?

A) The atom's radius decreases and the atom becomes a positive ion. B) The atom's radius increases and the atom becomes a negative ion.
C) The atom's radius decreases and the atom becomes a negative ion. D) The atom's radius increases and the atom becomes a positive ion.
 
Answer & Explanation Answer: A) The atom's radius decreases and the atom becomes a positive ion.

Explanation:

When an atom loses an electron it becomes a positive ion by acquiring negatively charged. When it loses electron, the atom's radius also decreased.

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Filed Under: Chemistry
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Q:

I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide. What am I?

Answer

The Sunglasses. 


It protects us from the sunlight and it sits on the bridge means hangs on our ears and nose. Only who keeps that can see through it and others wonder what he is watching.

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Q:

How many Covalent Bonds can Nitrogen form

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

Explanation:

Nitrogen (N2) forms Three Covalent Bonds to become stable.

 

Here the Atmomic Number of Nitrogen is 7. Because there are 2 electrons in the first orbital and 5 in the second and you still have space for 3 more. So it shares, 3 to get the stable octet. Therefore, there are 3 covalent bonds in N2.

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Filed Under: Chemistry
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Q:

Phage typing is based on the fact that

A) viruses cause disease B) bacteria and viruses are related
C) bacteria are destroyed by viruses D) bacterial viruses attack specific cells
 
Answer & Explanation Answer: D) bacterial viruses attack specific cells

Explanation:

Phage typing is based on the fact that bacterial viruses attack specific cells. Phage typing is a method used for detecting single strains of bacteria. It is used to trace the source of outbreaks of infections. 

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Filed Under: Biology
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Q:

A lion eating a zebra is an example of

A) predation B) a keystone species
C) herbivory D) habitat destruction
 
Answer & Explanation Answer: A) predation

Explanation:
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Filed Under: Animals and Birds
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Q:

Clarence Pine Top Smith played what style of piano?

A) Mozart B) Boogie - Woogie
C) Beethoven D) Liszt
 
Answer & Explanation Answer: B) Boogie - Woogie

Explanation:

Pine Top Smith (1899-1929) Considered to be the originator of the Boogie -Woogie style of piano playing.

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Filed Under: Famous Personalities
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Q:

The capacity of a water heater is measured in

A) Gallons B) Liters
C) Meters D) Both A & B
 
Answer & Explanation Answer: D) Both A & B

Explanation:

The capacity of a water heater is measured in Gallons or Liters. In the USA, it is measured in Gallons and in India, we measure it in Liters.

Hence, if the capacity of the water heater is 15 gallons or 15 liters, then it says that it can hold 15 gallons or 15 liters of water.

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Filed Under: Physics
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Q:

Which part of the flame is the hottest?

A) Blue Zone B) Luminous Zone
C) Dark Zone D) Non - Luminous Zone
 
Answer & Explanation Answer: A) Blue Zone

Explanation:

Blue Zone is the hottest part of the flame that is where the flame has the most Oxygen and you are getting complete combustion. It is about 1400 degrees Centigrades. The Reddish part (Non - Luminous Zone) is the coolest part, about 800 deg C.

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Filed Under: Physics
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