Q:

Rectifiers convert _____.

A) high voltage to low voltage	B) low voltage to high voltage
C) AC to DC	D) DC to AC

Answer & Explanation Answer: C) AC to DC

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Q:

The radius of curvature of a concave mirror is 30 cm. Following Cartesian Sign Convention, its focal length is expressed as

A) -30 cm	B) -15 cm
C) +30 cm	D) +15 cm

Answer & Explanation Answer: B) -15 cm

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Q:

Which of the following authority is elected on the basis of proportional representation in India?

A) Prime Minister	B) President
C) Governor	D) Lok Sabha Speaker

Answer & Explanation Answer: B) President

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Q:

National Income refers to ___________

A) money value of goods and services produced in a country during a year	B) money value of stocks and shares of a country during a year
C) money value of capital goods produced by a country during a year	D) money value of consumer goods and services produced in a country during a year

Answer & Explanation Answer: A) money value of goods and services produced in a country during a year

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Q:

Which of the following is not a nitrogenous fertiliser?

A) Ammonium sulphate	B) Urea
C) Ammonium nitrate	D) Superphospohate

Answer & Explanation Answer: D) Superphospohate

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Q:

Atomic Number of Hydrogen is _______.

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

Answer & Explanation Answer: D) 1

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Q:

Which among the following has highest electron affinity?

A) Chlorine	B) Fluorine
C) Helium	D) Xenon

Answer & Explanation Answer: A) Chlorine

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Q:

Select the option that correctly matches the contents of the first column with the contents of the second column.

A. Elements combine in fixed ratios	I. Dalton's atomic theory
B. Atoms are indivisible	II. The same number of molecules
C. Sulphate and Oxalate ions are anions, whereas magnesium and	III. Law of constant proportions
D. Gram atomic mass of an element and the gram molecular mass of a compound contain	IV. Ammonium ions are cations

A) A-III, B-II, C-IV, D-I	B) A-III, B-I, C-IV, D-II
C) A-III, B-IV, C-I, D-II	D) A-I, B-III, C-IV, D-II

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