Q:

Which of the following is used for disinfecting drinking water?

A) Baking powder	B) Bleaching powder
C) Washing soda	D) Baking soda

Answer & Explanation Answer: B) Bleaching powder

Explanation:

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Q:

Acacia arabica is the scientific name of

A) Neem	B) Teak
C) Babhul	D) Pomegranate

Answer & Explanation Answer: C) Babhul

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Q:

Which one of the following statements is not correct?

A) When total utility is maximum, marginal utility is zero	B) When total utility is decreasing, marginal utility is negative
C) When total utility is increasing, marginal utility is positive	D) When total utility is maximum,marginal and average utility are equal to each other.

Answer & Explanation Answer: D) When total utility is maximum,marginal and average utility are equal to each other.

Explanation:

Total utility -It is total psychological satisfaction which a consumer derives from the consumption of a commodity is known as total utility

Marginal utility -It is anaddition made in total utility by consuming and additional unit of a commodity is known as marginal utility.

•When marginal utility is positive,total utility increases

•When marginal utility is zero,total utility is at maximum

•When marginal utility is negative,total utility decreases

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Q:

What is the atomicity of Phosphorous?

A) Di-atomic	B) Poly-atomic
C) Tetra-atomic	D) Mono-atomic

Answer & Explanation Answer: C) Tetra-atomic

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Q:

Chandrabhaga beach is located in which state?

A) Odisha	B) Kerala
C) Chennai	D) Gujarat

Answer & Explanation Answer: A) Odisha

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Q:

Which of the following scientists gave the law that governs the force of attraction/repulsion between two charged particles?

A) Charles Dufay	B) Michael Faraday
C) Archimedes	D) Charles Coulomb

Answer & Explanation Answer: D) Charles Coulomb

Explanation:

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Q:

The maximum number of electrons that can be accommodated in a shell is indicated by the formula

A) 2n-2	B) 2n3
C) 2n	D) 2n2

Answer & Explanation Answer: D) 2n2

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Q:

If a country devalues its currency, its _______________

A) Exports become cheaper and imports become costlier	B) Exports become costlier and imports become cheaper.
C) Exports value is equivalent to imports value	D) No effect on exports and imports

Answer & Explanation Answer: A) Exports become cheaper and imports become costlier

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