Q:

Match the following with the correct response.

(1) W	(A) Nm
(2) kW	(B) $3.6 x 10^{6} J$
(3) 1 kW-h	(C) 1000 W
(4) 1 HP	(D) 746 W

A) 1-D, 2-B, 3-C, 4-A	B) 1-A, 2-B, 3-C, 4-D
C) 1-A, 2-C, 3-D, 4-B	D) 1-A, 2-C, 3-B, 4-D

Answer & Explanation Answer: D) 1-A, 2-C, 3-B, 4-D

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Q:

Which of the following plant group has hidden reproductive organs?

A) Bryophyta	B) Thallophyta
C) Pteridophyta	D) All option are correct

Answer & Explanation Answer: D) All option are correct

Explanation:

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Q:

Generally covalently bonded molecules ______.

I. have high boiling and melting point as compare to ionically bonded molecules

II. poor conductors of electricity

III. have weak intermolecular force

A) Only I and II	B) Only I and III
C) Only II and III	D) All I, II and III

Answer & Explanation Answer: C) Only II and III

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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

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Q:

According to Rutherford the radius of the nucleus is about ______ than the radius of the atom.

A) 105 times greater	B) 105 times lesser
C) 109 times greater	D) 107 times greater

Answer & Explanation Answer: B) 105 times lesser

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Q:

An object is placed at the centre of curvature of a concave mirror. Its image is formed at

A) a point beyond centre of curvature	B) a point between focus and centre of curvature
C) the centre of curvature	D) the focus

Answer & Explanation Answer: B) a point between focus and centre of curvature

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Q:

If V/I is a constant, it is called:

A) Potential difference	B) Current
C) Coulomb	D) Resistance

Answer & Explanation Answer: D) Resistance

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Q:

Plants of which group are predominantly aquatic?

A) Thallophyta	B) Bryophyta
C) Pteridophyta	D) No option is correct

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