Q:

In the gamma decay of a nucleus

A) the mass number of the nucleus changes whereas its atomic number does not change	B) the mass number of the nucleus does not change whereas its atomic number changes
C) both the mass number and the atomic number of the nucleus change	D) neither the mass number nor the atomic number of the nucleus changes

Answer & Explanation Answer: D) neither the mass number nor the atomic number of the nucleus changes

Explanation:

The emission of gamma rays does not alter the number of protons or neutrons in the nucleus but instead has the effect of moving the nucleus from a higher to a lower energy state (unstable to stable)

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Q:

Instrument for measuring low temperatures is called

A) Diagometer	B) Cryometer
C) Chromatoptometer	D) Cymometer

Answer & Explanation Answer: D) Cymometer

Explanation:

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Q:

If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is half as that of earth is _________________.

A) 2g	B) g/4
C) g/2	D) 4g

Answer & Explanation Answer: D) 4g

Explanation:

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Q:

The instrument used for measuring air pressure is called .....

A) Anemometer	B) Barometer
C) Hygrometer	D) Thermometer

Answer & Explanation Answer: B) Barometer

Explanation:

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Q:

The pitch of a sound depends on its ____.

A) frequency	B) wavelength
C) amplitude	D) timbre

Answer & Explanation Answer: A) frequency

Explanation:

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Q:

When a number of resistance are connected in ___, their combined resistance is less than the smallest individual resistance.

A) parallel	B) horizontal
C) series	D) box

Answer & Explanation Answer: A) parallel

Explanation:

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Q:

Assuming that the charge of an electron is $1.6 x 10^{- 19} C$ , the number of electrons passing through a section of wire per second when the wire carries a current of 1 A is

A) 6.25 x 1018 C	B) 1.6 x 10-19 C
C) 1.6 x 1019 C	D) 0.625 x 1017 C

Answer & Explanation Answer: A) 6.25 x 1018 C

Explanation:

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Q:

According to Census 2011, which one of the following is the correct sequence of States in decreasing order of their total size of population?

A) Kerala, Jharkhand, Assam, Punjab	B) Jharkhand, Kerala, Assam, Punjab
C) Kerala, Jharkhand, Punjab, Assam	D) Jharkhand, Kerala, Punjab, Assam

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