Q:

What is the principal focus of a spherical mirror?

A) It is a point from which the rays of light appear to be coming from on the principal axis of a convex mirror	B) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection or appear to be arising from this point on the principal axis
C) It is the centre of a hollow sphere of which the spherical mirror is a part	D) It is the midpoint of a spherical mirror

Answer & Explanation Answer: B) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection or appear to be arising from this point on the principal axis

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Filed Under: Physics
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Q:

What does the symbol R in electricity stand for ?

A) Resistance	B) Resonance
C) Refraction	D) Rarefaction

Answer & Explanation Answer: A) Resistance

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Q:

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.
I am coming directly(A)/to my office(B)/from the station.(C)/No error(D)

A) B	B) A
C) D	D) C

Answer & Explanation Answer: A) B

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Q:

Which of the following meals is NOT obtained by reduction using carbon?

A) Copper	B) Sodium
C) Iron	D) Zinc

Answer & Explanation Answer: B) Sodium

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Filed Under: Chemistry
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Q:

___, present in the centre of a flower, forms the female reproductive part.

A) Sepals	B) Petals
C) Carpels	D) Stamens

Answer & Explanation Answer: C) Carpels

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Filed Under: Biology
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Q:

Which of the following statements is wrong with regard to strong acids?

A) Strong acids react very rapidly with other substances (such as metal carbonates and metal hydrogen carbonates)	B) Hydrochloric acid, Sulphuric acid and Nitric acid are strong acids
C) Acids are those chemical substances that have a salty taste	D) All minerals acids are strong acids

Answer & Explanation Answer: C) Acids are those chemical substances that have a salty taste

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Q:

In the following question, a sentence has been given in Active/Passive voice. Out of the four alternatives suggested, select the one which best
expresses the same sentence in Passive/Active voice.
The theatre was keeping a seat for you.

A) A seat was being kept for you by the theatre.	B) Keeping of a seat for you has been done by the theatre.
C) The theatre has kept a seat for you.	D) A seat would be kept for you by the theatre.

Answer & Explanation Answer: A) A seat was being kept for you by the theatre.

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Filed Under: English

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Q:

Which of the following is not a voluntary action?

A) Taking an object	B) Beating of heart
C) Moving a chair	D) Closing a fist

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