Q:

An atom has 7 electrons in its M - shell and contains 18 neutrons in its nucleus. What is its mass number

A) 25	B) 27
C) 35	D) 43

Answer & Explanation Answer: C) 35

Explanation:

According to Bohr model, Each shell can occupy 2 $n^{2}$ electrons in their orbits where n=1,2,3.. for K,L,M,..

The atom has 2 electrons in k, 8 electrons in L and 7 electrons in M = 2 + 8 + 7 = 17

And given that its nucleus has 18 neutrons

=> its mass number = number of (electrons + neutrons ) = 17 + 18 = 35

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Filed Under: Chemistry

45 9596

Q:

The relative density of a substance is the ____.

A) ratio of its density to the density of water	B) ratio of the density of water to its density
C) product of the density of water to its density	D) ratio of the volume of water to its volume

Answer & Explanation Answer: A) ratio of its density to the density of water

Explanation:

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Filed Under: Physics
Exam Prep: Bank Exams

1 9593

Q:

Veto power is not possessed by

A) U.K	B) U.S.A
C) Rrussia	D) West Germany

Answer & Explanation Answer: D) West Germany

Explanation:

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Filed Under: World Organisations

22 9590

Q:

The bleeding of a wound is stopped by the application of ferric chloride because_____

A) Ferric chloride seals the blood vessels	B) Blood starts flowing in the opposite direction
C) Blood reacts and a solid is formed which seals the blood vessels	D) Blood is coagulated and the blood vessels are sealed

Answer & Explanation Answer: D) Blood is coagulated and the blood vessels are sealed

Explanation:

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Filed Under: Chemistry

36 9585

Q:

Fill in the blank with the most appropriate option.

An element attains stability when it achieves ________ state.

A) an only-duplet	B) an only-octet
C) a duplet or octet	D) a heptate

Answer & Explanation Answer: C) a duplet or octet

Explanation:

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Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

0 9581

Q:

Rearrange the parts of the sentence in correct order.

It is up to

P : consumers now to appreciate

Q : exercise this power with care

R : the threat of antibiotic resistance and

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

Answer & Explanation Answer: A) PRQ

Explanation:

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Filed Under: English
Exam Prep: Bank Exams , GRE , TOEFL

0 9580

Q:

Which is the only woman to have won the three Wimbledon titles in a row

A) Mari Pearey	B) Miton
C) Sang Chan	D) Steffi Graff

Answer & Explanation Answer: D) Steffi Graff

Explanation:

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Filed Under: Sports

9 9577

Q:

If a new device is attached to a computer, such as printer or scanner, its ______ must be installed before the device can be used

A) buffer	B) driver
C) pager	D) server

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