Q:

What happens as we go down the group in the periodic table?

A) The number of shells decreases	B) Valence electrons decreases
C) The number of shells increases	D) Atomic size decreases

Answer & Explanation Answer: C) The number of shells increases

Explanation:

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Q:

Which of the following is an amphoteric oxide?

A) Aluminium oxide	B) Iron oxide
C) Magnesium oxide	D) Carbon dioxide

Answer & Explanation Answer: A) Aluminium oxide

Explanation:

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Q:

The most active ingredient in bleaching powder is

A) Iodine	B) Calcium hypochlorite
C) Nitric acid	D) Ammonium sulphate

Answer & Explanation Answer: B) Calcium hypochlorite

Explanation:

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Q:

Which kind of cell division is used to repair an injury by the body?

A) Mitosis only	B) Meiosis only
C) Both Mitosis and Meiosis	D) Neither Mitosis nor Meiosis

Answer & Explanation Answer: A) Mitosis only

Explanation:

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Q:

Involuntary actions in human beings such as blood pressure, salivation and vomiting are controlled by the

A) Spinal cord	B) Hypothalamus
C) Pons	D) Medulla

Answer & Explanation Answer: D) Medulla

Explanation:

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Q:

Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. If there is no error, theanswer is (E), ie ‘No error’. (Ignore the errors of punctuation, if any.)

The reason why he failed/ to attend the meeting/ with a complete presentation/ was because he was unwell./ No error

A) The reason why he failed	B) to attend the meeting
C) with a complete presentation	D) was because he was unwell.

Answer & Explanation Answer: D) was because he was unwell.

Explanation:

The group of words “the reason why" already indicates the reason. There is no need to use the word “because". The word connecting the two clauses should be “that".

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Filed Under: English
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Q:

Which of the following is Study of fossils ?

A) Ethology	B) Etiology
C) Anthropology	D) Palaeontology

Answer & Explanation Answer: D) Palaeontology

Explanation:

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Q:

The 'solid waste' is also known as

A) Sedge	B) Toxic waste
C) Sludge	D) Scrubber

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