Q:

In which part of the cell are proteins made?

A) reticulum	B) Golgi apparatus
C) ribosomes	D) lysosome

Answer & Explanation Answer: C) ribosomes

Explanation:

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Q:

The element with the highest electron affinity among halogens is

A) F	B) I
C) Cl	D) Br

Answer & Explanation Answer: C) Cl

Explanation:

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Q:

The chemical formula of Sodium Carbonate is

A) Na3CO2	B) Na2CO
C) NaCO3	D) Na2CO3

Answer & Explanation Answer: D) Na2CO3

Explanation:

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Q:

A drainage pattern where a river is joined by its tributaries approximately at right angles is ____________

A) Dendritic	B) Trellis
C) Rectangular	D) Radial

Answer & Explanation Answer: B) Trellis

Explanation:

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Q:

In the equation of motion $2 as = v^{2} - u^{2}$ , s represents _________________.

A) speed	B) displacement
C) velocity	D) acceleration

Answer & Explanation Answer: B) displacement

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Q:

If the power of a corrective lens is +2.0 D, then it is a

A) convex lens	B) concave lens
C) convex mirror	D) concave mirror

Answer & Explanation Answer: A) convex lens

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Q:

Which one of the following statements is not correct?

A) The response of the ear to sound of increasing intensity is approximately logarithmic.	B) The sensitivity of the human ear does not vary with the frequency of the sound.
C) When two or more waves traverse the same medium, the displacement of any element of the medium is the algebraic sum of the displacements due to each wave.	D) Longitudinal waves can travel in all media-solids, liquids and gases.

Answer & Explanation Answer: B) The sensitivity of the human ear does not vary with the frequency of the sound.

Explanation:

The human ear can respond to minute pressure variations inthe air if they are in the audible frequency range, roughly 20 Hz -20 kHz. In fact, tests conducted show an increased sensitivity in the 3000 Hz range which is the optimal amplification frequency in the human ear. So, the sensitivity of the human ear varies with the frequency of the sound.

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Q:

Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

A) -4.33 diopters	B) 12.33 diopters
C) -12.33 diopters	D) 4.33 diopters

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