Q:

For which one of the following does the centre of mass lie outside the body?

A) A fountain pen	B) A cricket ball
C) A ring	D) A book

Answer & Explanation Answer: C) A ring

Explanation:

For balancing the weight of ring, you need to put your finger or any solid object inside the ring so that you will be able to sustain their own weight because they are not able to sustain their own weight.so its centre of mass lies outside the body.

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Q:

The salt concentration (measured as salinity in parts per thousand), is greater than _______ % in hypersaline lagoons.

A) 50	B) 100
C) 150	D) 200

Answer & Explanation Answer: B) 100

Explanation:

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Filed Under: Chemistry
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Q:

Select the word with the correct spelling.

A) arobics	B) chosers
C) batered	D) eternity

Answer & Explanation Answer: D) eternity

Explanation:

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Filed Under: English
Exam Prep: AIEEE , Bank Exams , CAT , GRE , TOEFL

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Q:

Which of the following player have clinched 2018 WBL World Billiards Championship title?

A) Sourav Kothari	B) Anuja Chandra
C) Chitra Magimairaj	D) None of the above

Answer & Explanation Answer: A) Sourav Kothari

Explanation:

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Q:

Industrialization resulted in what changes to American society?

A) economic growth	B) increased urbanization
C) Both A & B	D) new business practices

Answer & Explanation Answer: C) Both A & B

Explanation:

Industrialization resulted in both economic growth and increased urbanization in American society.

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Q:

Which country plans to launch international lunar base?

A) Japan	B) India
C) Russia	D) China

Answer & Explanation Answer: D) China

Explanation:

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Q:

Centrifugal force increases with

A) Temperature	B) Pressure
C) Acceleration	D) Humidity

Answer & Explanation Answer: C) Acceleration

Explanation:

Centrifugal force is the fictitious force that pulls out from the center on the body we feel while moving in the circular path. It increases with the rate of rotation of the axis i.e, acceleration of the body.

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Q:

For a certain reaction,DGq = -45 kJ/mol and DHq= -90 kJ/mol at 0°C. What is the minimum temperature at which the reaction will become spontaneous, ifDHq and DSq are independent of temperature?

A) 273 K	B) 298 K
C) 546 K	D) 596 K

Answer & Explanation Answer: C) 546 K

Explanation:

T = 273 °K

Using the formula,

DGq = DHq –TDS

-45 = -90 –273 DS

DS = 0.164

Now since DHq and DSq are independent,T2= DH/DS = 45/0.164 = 273°K

Required Temp = 273 + 273 = 546°K

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