Q:

Ozone is represented as _____.

A) O3	B) H2O2
C) Cl2O	D) N2O

Answer & Explanation Answer: A) O3

Explanation:

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Filed Under: Chemistry
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Q:

Which of the following elements has the lowest melting point?

A) Iron	B) Nitrogen
C) Iodine	D) Lead

Answer & Explanation Answer: B) Nitrogen

Explanation:

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Filed Under: Chemistry
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Q:

Which one of the following statements is correct?

A) The oxidation number for hydrogen is always zero.	B) The oxidation number for hydrogen is always + 1.
C) The oxidation number for hydrogen is always -1.	D) Hydrogen can have more than one oxidation number.

Answer & Explanation Answer: D) Hydrogen can have more than one oxidation number.

Explanation:

Hydrogen has two possible oxidation numbers: +1 and -1.

-1 in case of hydrides.

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Filed Under: Chemistry
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Q:

Polio is caused by

A) Bacteria	B) Virus
C) Fungus	D) Protozoa

Answer & Explanation Answer: B) Virus

Explanation:

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Filed Under: Biology

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Q:

Algal bloom results from

A) Global warming	B) Salination
C) Eutrophication	D) Biomagnification

Answer & Explanation Answer: C) Eutrophication

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Filed Under: Biology
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Q:

__________ of an input is defined as the change in output per unit of change in the input when all other inputs are held constant.

A) Marginal product	B) Production function
C) Total product	D) Average product

Answer & Explanation Answer: A) Marginal product

Explanation:

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Filed Under: Indian Economy
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Q:

Which of the following is NOT based on principle of relationship between volume and pressure of air?

A) Fountain pen	B) Bicycle pump
C) Hand pump	D) Pulley

Answer & Explanation Answer: D) Pulley

Explanation:

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Filed Under: Physics
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Q:

In the following question, out of the given four alternatives, select the one which is opposite in meaning of the given word.

Abutting

A) Touching	B) Far
C) Bordering	D) Joining

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