Q:

The chemical properties of an element depend upon

A) the number of isotopes of the element	B) the mass number of the element
C) the total number of neutrons in the element	D) the number of electrons in the outermost shell of the element

Answer & Explanation Answer: D) the number of electrons in the outermost shell of the element

Explanation:

Chemical properties of an element depend on the number and the configuration of their (valence) electrons.

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Q:

In each of the questions, four alternatives are given for the Idiom/Phrase. Choose the alternative which best expresses the meaning of the Idiom/Phrase and click the button corresponding to it.

Fair - weather friend

A) Honest only when easy and convenient	B) Truthful only when easy and convenient
C) Supports only when easy and convenient	D) Temporary only when easy and convenient

Answer & Explanation Answer: C) Supports only when easy and convenient

Explanation:

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Q:

Dudhwa Tiger Reserve is in which state?

A) Karnataka	B) Uttar Pradesh
C) Chhattisgarh	D) West Bengal

Answer & Explanation Answer: B) Uttar Pradesh

Explanation:

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Q:

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.

Fourteen kilometres ______ not a short distance, to reach to my office daily.

A) are	B) has
C) have	D) is

Answer & Explanation Answer: D) is

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 gases is produced due to incomplete combustion of fuel?

A) Carbon Dioxide	B) Carbon Monoxide
C) Methane	D) Ethane

Answer & Explanation Answer: B) Carbon Monoxide

Explanation:

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Q:

Which of the following allotropes of Carbon is used as a reducing agent in metallurgy?

A) Carbon Black	B) Graphite
C) Charcoal	D) Coke

Answer & Explanation Answer: D) Coke

Explanation:

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Q:

The yellow colour of human urine is due to

A) Bile Salts	B) Cholesterol
C) Lymph	D) Urochrome

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