Q:

In the following question, select the odd letter/ letters from the given alternatives

A) DHM	B) GKO
C) IMQ	D) LPT

Answer & Explanation Answer: A) DHM

Explanation:

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Q:

From the given answer figures, select the one in which the question figure is hidden/embedded.

A) 1	B) 2
C) 3	D) 4

Answer & Explanation Answer: A) 1

Explanation:

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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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Q:

Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?

A) B2H6	B) NF3
C) CCl3F	D) C6H6

Answer & Explanation Answer: C) CCl3F

Explanation:

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Q:

Number of Sigma and Pi bonds in benzene, respectively is

A) 12 and 3	B) 3 and 3
C) 6 and 3	D) 9 and 3

Answer & Explanation Answer: A) 12 and 3

Explanation:

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Q:

In the Modern Periodic Table, elements are arranged in

A) increasing atomic mass number	B) increasing atomic number
C) decreasing atomic mass number	D) decreasing atomic number

Answer & Explanation Answer: B) increasing atomic number

Explanation:

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Q:

The credit for classifying the elements on the basis of their atomic masses goes to

A) John Dalton	B) John Alexander Reina Newlands
C) Dmitri Mendeleev	D) Johann Wolfgang Dobereiner

Answer & Explanation Answer: C) Dmitri Mendeleev

Explanation:

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Q:

In the following question, out of the four alternatives, select the word opposite in meaning to the word given.
Opprobrium

A) Adulation	B) Ignominy
C) Mystical	D) Preclude

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