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Q:

What is the gram formula mass of K2CO3?

A) 147 B) 138
C) 129 D) 116
 
Answer & Explanation Answer: B) 138

Explanation:

The gram formula mass of a compound is nothing but the molar mass.

The molar mass of K2CO3 (Potassium Carbonate) is given by

Atomic weights of individual elements are

 

K (Potassium) = 39 g

C (Carbon) = 12 g

O (Oxygen) = 16 g

 

Hence, that of K2CO3 = 39(2) + 12 + 16(3)

= 78 + 12 + 48

= 138.

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Filed Under: Chemistry
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Q:

Which one of the following is not true for minerals?

A) they can be a liquid, solid, or glass B) they can be identified by characteristic physical properties
C) they have a specific, internal, crystalline structure D) they have a specific, predictable chemical composition
 
Answer & Explanation Answer: A) they can be a liquid, solid, or glass

Explanation:

A mineral is a naturally occurring, inorganic solid, with a definite chemical composition. They cannot be in liquid or gas state. They exists only in solid state.

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Filed Under: Chemistry
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Q:

Cloud computing is not suited for situations

A) where complex legacy systems have to be ported B) characterized by limited-time tasks
C) involving offloading of expensive computing tasks D) with no existing regulatory compliance issues
 
Answer & Explanation Answer: A) where complex legacy systems have to be ported

Explanation:

Cloud computing is not suited for situations where complex legacy systems have to be ported.

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Filed Under: Database
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Q:

Which of the following metal is generally used for making filaments of bulb?

A) W B) Ag
C) Fe D) Rh
 
Answer & Explanation Answer: A) W

Explanation:

W is the symbol for chemical element Tungsten or Wolfram.

It is used in making filaments of bulbs.

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Q:

Which of the following is definitelyy a major indication of the state of the economy of the country

A) rate of GDP growth B) rate of inflation
C) number of banks in a country D) stock of food grains in a country
 
Answer & Explanation Answer: A) rate of GDP growth

Explanation:
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Filed Under: Indian Economy

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Q:

When more than 20% of the body weight is due to fat, the person is suffering from

A) Marasmus B) Kwashiorkor
C) Scurvy D) Obesity
 
Answer & Explanation Answer: D) Obesity

Explanation:
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Filed Under: Biology

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Q:

Pressure, pain, and temperature receptors in the skin are

A) Exteroceptors B) Proprioceptors
C) Interoceptors D) Mechanoreceptors
 
Answer & Explanation Answer: A) Exteroceptors

Explanation:
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Filed Under: Biology
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Q:

During Mughal period there was continuous emigration of the .........to places ruled by Hindu Rajas

A) Nobles B) Poor
C) Middle Class D) Foreign residents
 
Answer & Explanation Answer: B) Poor

Explanation:
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Filed Under: Indian History

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