Q:

Which of the following is not true about Pteridophyta?

A) Dominant phase is saprophytes	B) Main plant body is diploid
C) Seeds are present	D) Flowers are absent

Answer & Explanation Answer: C) Seeds are present

Explanation:

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Q:

Crystallisation is an example of?

A) Physical Change	B) Chemical Change
C) Chemical Reaction	D) Galvanisation

Answer & Explanation Answer: A) Physical Change

Explanation:

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Q:

Binomial Nomenclature was founded by

A) Charles Darwin	B) Robert Nucleus
C) Carl Linnaeus	D) Lamarck

Answer & Explanation Answer: C) Carl Linnaeus

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Q:

How many atoms are present in one molecule of Ozone?

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

Answer & Explanation Answer: D) 3

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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:

Chemical properties of isotopes .............

A) must be same	B) must be different
C) need not be same	D) need not be different

Answer & Explanation Answer: A) must be same

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Q:

Which of the following gases are responsible for the greenhouse gas effect on Earth?

A) Water Vapour and Carbon dioxide	B) Carbon dioxide and Nitrogen
C) Oxygen and Methane	D) Ozone and Methane

Answer & Explanation Answer: A) Water Vapour and Carbon dioxide

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Q:

The Headquarters of the Southern Naval Command of the Indian Navy is located at which one of the following places?

A) Karwar	B) Kochi
C) Thiruvananthapuram	D) Chennai

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