Which of the following was first to be discovered in the chromospheres of the sun...? Mcqs

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Which of the following was first to be discovered in the chromospheres of the sun...?

(A) Krypton
(B) Xenon

(C) Neon
(D) Helium

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A radioactive nuclide emits a β-particle. The atomic number (proton number) of the nucleus number of ______...?

(A) Stays the same
(B) Decreases by 2

(C) Increases by 1
(D) Decreases by 4

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According to which law gas is directly proportional to temperature...?

(A) Charles Law
(B) Boyles Law

(C) Grams Law
(D) Dalton’s Law

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Techniques for manipulation of gene to achieve desirable characters are called...?

(A) Biotechnology
(B) Biochemistry

(C) Genomics
(D) Gene Therapy

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The S. I. unit of refractive index is _______...?

(A) meter
(B) cm

(C) watt
(D) no unit

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The total energy of revolving electron in an atom_____________...?

(A) Will always be positive
(B) Can never be positive

(C) Can have any value above zero
(D) Cannot be negative

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Which is the biggest star in the Universe...?

(A) UY Scuti
(B) Rigel

(C) Canopus
(D) Arcturus

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Which statement is incorrect about chemical reactions...?

(A) States of matter does not change during chemical reactions
(B) Chemical reactions produce new substances

(C) Chemical reactions occur with the absorption or emission of energy
(D) Chemical reactions may be fast, moderate or slow

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What is produced when fuel is burned...?

(A) Carbon monoxide gas
(B) Methane gas

(C) Carbon dioxide gas
(D) Helium gas

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Among the planets of the Solar system the position of the Earth from the Sun is:_________...?

(A) Second
(B) Third

(C) Fourth
(D) Sixth

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