Q:

Stars twinkle but planets do not twinkle because

A) they emit light of a constant intensity	B) their distance from the earth does not change with time
C) they are very far away from the earth resulting in decrease in intensity of light	D) they are nearer to the earth and hence we receive a greater amount of light and therefore minor variations in intensity are not noticeable

Answer & Explanation Answer: A) they emit light of a constant intensity

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Q:

The method of soil conservation in which stones, grass, soil are used to build barriers along contours and trenches are made in front of the barriers to collect water is called?

A) Mulching	B) Contour barriers
C) Rock dam	D) Terrace farming

Answer & Explanation Answer: B) Contour barriers

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Q:

Ozone hole is caused by chemicals like _____.

A) Nitrogen Oxide	B) Hydrogen Sulphide
C) Chloro Fluoro Carbon	D) Carbon Monoxide

Answer & Explanation Answer: C) Chloro Fluoro Carbon

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Q:

The Environment (Protection) Act of India was enacted in the year -

A) 1997	B) 1986
C) 2004	D) 2012

Answer & Explanation Answer: B) 1986

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Q:

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement isneeded, select "no improvement".

My daughter (comes running) as fast as her little feet can take her while her eyes sparkle vivaciously

A) comes run	B) come running
C) came run	D) no improvement

Answer & Explanation Answer: D) no improvement

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Q:

Which of the following is a CORRECT statement?

A) Only compounds are pure substance	B) Compounds are impure substance
C) Only elements are pure substance	D) Both compounds and elements are pure substance

Answer & Explanation Answer: D) Both compounds and elements are pure substance

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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

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Q:

The gas evolved when sodium carbonate reacts with hydrochloric acid is

A) Hydrogen	B) Chlorine
C) Hydrogen Chloride	D) Carbon dioxide

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