Q:

Which one of the following is lyophilic colloid?

A) Gold sol	B) Smoke
C) Cloud	D) Starch aqueous solution

Answer & Explanation Answer: D) Starch aqueous solution

Explanation:

Starch aqueous solution is a lyophilic colloidal solution.

Lyophilic colloids are liquid loving colloids. When these colloids are mixed with suitable liquid high force of attraction exists between colloidal particles and liquid.

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Q:

Goods for which demand move in the opposite direction of the income of the consumer are called?

A) Inferior goods	B) Normal goods
C) Complementary goods	D) Substitute goods

Answer & Explanation Answer: A) Inferior goods

Explanation:

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Q:

If price of an article decreases from Rs 80 to Rs 60, quantity demanded increases from 600 units to 750 units. Find point elasticity of demand?

A) -1	B) 1
C) -1.25	D) 1.25

Answer & Explanation Answer: A) -1

Explanation:

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Q:

Who propounded the homeopathic principle of 'like cures like'?

A) Hippocrates	B) Samuel Hahnemann
C) Samuel Cockburn	D) George Vithoulkas

Answer & Explanation Answer: B) Samuel Hahnemann

Explanation:

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Q:

Sensitivity of potentiometer can be increased by

A) increasing the length of the potentiometer wire	B) increasing the e.m.f of the cell
C) decreasing the length of the potentiometer wire	D) none of these

Answer & Explanation Answer: A) increasing the length of the potentiometer wire

Explanation:

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Q:

The speed of the light is maximum in

A) Air	B) Vacuum
C) Water	D) Glass

Answer & Explanation Answer: B) Vacuum

Explanation:

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Q:

Two particles with charges q1 and q2 are kept at a certain distance to exert force F on each other. If the distance is reduced to one-fifth, then the force between them is

A) F/25	B) 5F
C) F/5	D) 25F

Answer & Explanation Answer: D) 25F

Explanation:

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Q:

A conductor having some appreciable resistance is called a

A) Resistor	B) Insulator
C) Conductor	D) Semi-conductor

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