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

9 6137

Q:

The highest mountain peak of Chhotanagpur Plateau is ________.

A) Dhoopgarh	B) Pachmarhi
C) Parasnath	D) Parasnath

Answer & Explanation Answer: C) Parasnath

Explanation:

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Filed Under: Indian Geography
Exam Prep: Bank Exams

1 6132

Q:

A place where government records are kept

A) Coffer	B) Pantry
C) Archives	D) Scullery

Answer & Explanation Answer: C) Archives

Explanation:

A place where government records are kept are called Archives.

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Filed Under: English
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

9 6131

Q:

The dolphin is

A) Fish	B) Reptile
C) Mammal	D) Turtle

Answer & Explanation Answer: C) Mammal

Explanation:

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Filed Under: Animals and Birds

50 6131

Q:

On the Kelvin scale ,the melting point of ice is

A) 373K	B) 100K
C) 273K	D) 0 K

Answer & Explanation Answer: C) 273K

Explanation:

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12 6130

Q:

Rearrange the parts of the sentence in correct order.

We should learn our lesson
P-from this history and stay away
Q-of our neighbours
R-from interfering in the messy domestic politics

A) PRQ	B) PQR
C) QPR	D) RPQ

Answer & Explanation Answer: A) PRQ

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

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Q:

Fish and other aquatic creatures can live inside a deep frozen pond because

A) fish are cold-blooded animals	B) ice is a bad conductor of heat
C) there will always be water just beneath the ice level	D) they can adapt themselves to live in ice

Answer & Explanation Answer: C) there will always be water just beneath the ice level

Explanation:

Water has the maximum density at $4^{o} C$ . So at this temperature, it sinks down to bottom and stays here. If it cools further, it will become less dense and move up. So while the upper layers can cool enough to form ice, the bottom layers remain as water at $4^{o} C$ .

Therefore, (C) is correct.

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Filed Under: Physics
Exam Prep: CAT , AIEEE
Job Role: Analyst

20 6126

Q:

According to Rutherford the radius of the nucleus is about ______ than the radius of the atom.

A) 105 times greater	B) 105 times lesser
C) 109 times greater	D) 107 times greater

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