Q:

Besides CO2, the other green house gas is

A) CH4	B) N2
C) Ar	D) O2

Answer & Explanation Answer: A) CH4

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Q:

‘Plum Pudding Model’ for an atom was proposed by

A) Antoine Lavoisier	B) Robert Boyle
C) Ernest Rutherford	D) J. J. Thomson

Answer & Explanation Answer: D) J. J. Thomson

Explanation:

The first model of atom was proposed by J. J. Thomson in 1898.According to this model, the positive charge of the atom is uniformly distributed throughout the volume of the atom and the negatively charged electrons are embedded in it like seeds in a watermelon. This model was picturesquely called plum pudding model of the atom

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Q:

Atomic number of which of the following elements is greater than that of Copper?

A) Iron	B) Chromium
C) Zinc	D) Manganese

Answer & Explanation Answer: C) Zinc

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Q:

Metals react with sodium hydroxide to produce ___________.

A) oxygen gas	B) sodium
C) water	D) hydrogen gas

Answer & Explanation Answer: D) hydrogen gas

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Q:

Earth's crust mainly contains ______.

A) bauxite	B) manganese
C) silica	D) iron

Answer & Explanation Answer: C) silica

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Q:

Madhubani artwork started in which state of India?

A) Bihar	B) Uttar Pradesh
C) Rajasthan	D) Gujrat

Answer & Explanation Answer: A) Bihar

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Q:

In the following question, four words are given out of which one word is incorrectly spelt. Select the incorrectly spelt word.

A) Alluminium	B) Cemetery
C) Recommend	D) Satellite

Answer & Explanation Answer: A) Alluminium

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Q:

In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?

A) 2:2	B) 1:3
C) 3:1	D) 4:0

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