General Knowledge Questions

Q:

Molar mass of HNO3?

A) 63 g/mol B) 53 g/mol
C) 48 g/mol D) 52 g/mol
 
Answer & Explanation Answer: A) 63 g/mol

Explanation:

Calculation of molar mass of HNO3:

Atomic masses of H, N, O are 1, 14, 16 respectively

Now the molar mass of HNO3 is

HNO3 = 1X1 + 1X14 + 3X16

= 1 + 14 + 48

= 63 g/mol or amu.

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Q:

Delonix regia Rafin is the scientific name of

A) Banyan B) Gulmohar
C) Tamarind D) Chiku
 
Answer & Explanation Answer: B) Gulmohar

Explanation:
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Q:

Bone strength in later life depends on

A) the formation of dense bones during youth B) the increased calcium absorption in the elderly
C) the increased production of estrogen after menopause D) reducing physical activity to protect bones
 
Answer & Explanation Answer: A) the formation of dense bones during youth

Explanation:
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Q:

The average weight of a blue whale is

Answer

1,20,000 kg.

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Q:

______ is a particular area from which all the voters living there choose their representatives.

A) Constituency B) Voting Area
C) Election Area D) Legislative Area
 
Answer & Explanation Answer: A) Constituency

Explanation:
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Q:

Electrostatic precipitator is used to control

A) Water pollution B) Noise pollution
C) Air pollution D) Solid waste
 
Answer & Explanation Answer: C) Air pollution

Explanation:

Electrostatic precipitator is used to control Air pollution. An electrostatic precipitator is a filtration device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit.

                         Electrostatic_precipitator_is_used_to_control1564054124.png image

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Q:

A body given with an initial velocity moved under the effect of gravity is called?

Answer

Projectile

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Subject: Physics

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Q:

"The Law of Kepler" is related with which among the following ?

A) Planetary Motion B) Law of Conservation of energy
C) Law of Gravitation D) None
 
Answer & Explanation Answer: A) Planetary Motion

Explanation:

Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun.

  • Kepler’s three laws of planetary motion can be stated as follows:

(1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci.

(2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.

(3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.

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