Q:

Which of the following statements are CORRECT?

I. Esters are sweet smelling substance.
II Esters are used in making perfumes.
III. Functional group of ester is R-O-RꞋ.

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

Answer & Explanation Answer: A) Only I and II

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Filed Under: Chemistry
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0 45411

Q:

Match the correct Memory units.

A) a-r, b-p, c-s, d-q	B) a-p,b-s, c-q, d-r
C) a-r, b-s, c-q, d-p	D) a-r, b-q, c-s, d-p

Answer & Explanation Answer: A) a-r, b-p, c-s, d-q

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Filed Under: Computer
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11 45354

Q:

The relative humidity of a region is low when :

A) The wet and dry bulb thermometers read the same	B) The difference between the readings of the wet and dry bulb thermometers is large
C) The temperature are high	D) The temperatures are low

Answer & Explanation Answer: B) The difference between the readings of the wet and dry bulb thermometers is large

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Filed Under: World Geography

7 45319

Q:

Who first discovered the every eighth element had properties similar to that of the first?

A) Newlands	B) Moseley
C) Dobereiner	D) Mendeleev

Answer & Explanation Answer: A) Newlands

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Filed Under: Chemistry
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1 45276

Q:

Plants of which group are predominantly aquatic?

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

Answer & Explanation Answer: A) Thallophyta

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Filed Under: Biology
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2 45240

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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Filed Under: Physics
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1 45210

Q:

What is formed when helium atom loses one electron?

A) Proton	B) Positive helium ion
C) Negative helium ion	D) Alpha particle

Answer & Explanation Answer: B) Positive helium ion

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1 45176

Q:

Elements having same atomic numbers but different mass number are called ______.

A) isotones	B) Isotopes
C) isomopes	D) isobar

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