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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:

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 ______________ monsoon winds carry lots of water from the Indian Ocean

A) northwest B) southwest
C) southeast D) northeast
 
Answer & Explanation Answer: B) southwest

Explanation:
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Q:

Which wood is used to make a cricket bat?

A) Teak B) Willow
C) Bamboo D) Rosewood
 
Answer & Explanation Answer: B) Willow

Explanation:
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Q:

Which of the following is NOT an effect of Noise Pollution?

A) Death of Animals B) Tinnitus
C) Hypertension D) Ozone Depletion
 
Answer & Explanation Answer: D) Ozone Depletion

Explanation:
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Q:

What will be the value of xy, if x2+y2 = 45 and x-y=5 ?

A) 10 B) 15
C) 20 D) 25
 
Answer & Explanation Answer: A) 10

Explanation:
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Q:

If a chord of a circle subtends an angle of 30° at the circumference of the circle, then what is the ratio of the radius of the circle and the length of the chord respectively?

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

Explanation:
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Q:

Who is the author of Manimekalai?

A) Kovalan B) Sathanar
C) Ilango Adigal D) Timtakkatevar
 
Answer & Explanation Answer: B) Sathanar

Explanation:

One of the finest jewels of Tamil poetry, the epic poem Manimekalai was written by Sathanar in 2nd century A.D. It is unique for the deep spirituality and mysticism it unfolds against the historical and geographical background of South India and of adjacent Jaffna.

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