Q:

When an object is thrown vertically upwards, at its maximum height its _____________.

A) potential energy is zero	B) momentum is maximum
C) kinetic energy is zero	D) gravitational force is maximum

Answer & Explanation Answer: C) kinetic energy is zero

Explanation:

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2 14265

Q:

Which of the following pairs is INCORRECT?

I. Haematite : Iron

II. Pitchblende : Copper

III. Monazite : Thorium

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

Answer & Explanation Answer: B) Only II

Explanation:

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Filed Under: Chemistry
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Q:

The nitrogen atom has 7 protons and 7 electrons,The nitride ion will have

A) 10 protons and 7 electrons	B) 7 protons and 10 electrons
C) 4 protons and 7 electrons	D) 4 protons and 10 electrons

Answer & Explanation Answer: B) 7 protons and 10 electrons

Explanation:

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42 14246

Q:

Select the synonym of

confuse

A) explicate	B) perplex
C) mix	D) divert

Answer & Explanation Answer: B) perplex

Explanation:

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Filed Under: English
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4 14236

Q:

Who said, " I therefore, want freedom immediately, this very night, before dawn, if it can be had

A) Mahatma Gandhi	B) Edwina Mounbatten
C) Jawaharlal Nehru	D) Ms. Taslima Nasreen

Answer & Explanation Answer: A) Mahatma Gandhi

Explanation:

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43 14229

Q:

A periscope works by the principle of

A) Total internal reflection	B) Refraction
C) Diffraction	D) Reflection & Refraction

Answer & Explanation Answer: A) Total internal reflection

Explanation:

A periscope is an optical instrument that uses a system of prisms, lenses, or mirrors to reflect images through a tube.

per11526634345.jpg image

Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube. At the bottom of the periscope, the light strikes another mirror and is then reflected into the viewer’s eye.

Hence, A periscope works by the principle of Total internal reflection.

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37 14220

Q:

Which one of the following places of India experiences highest atmospheric pressure during winter?

A) Jaisalmer	B) Leh
C) Chennai	D) Guwahati

Answer & Explanation Answer: B) Leh

Explanation:

As temperature of Leh will be lowest during winters from the given options, the highest pressure will be at Leh.

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Filed Under: Indian Geography
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Q:

Select the antonym of

veteran

A) youthful	B) pliable
C) expert	D) amateur

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