A 10 µF capacitor is charged by a battery of e.m.f 100 volts. The energy stored in the capacitor is

(1) 0.5 mJ
(2) 0.05 mJ
(3) 0.05 J
(4) 0.J

The chemical formula of chlorophyll-b is

 (1) C55 H70 O5 N5 Mg
 (2) C₅₅ H₇₀ O₆ N₄ Mg
 (3) C₅₅ H72 O₅ N₄ Mg
 (4) C₅₅ H72 O₅ N₅ Mg

 A ball of mass m attached to the end of a string revolves in a vertical circle of radius R. When the ball is at the top of the circle it is moving horizontally with a speed v. What is the tension in the string when the ball is at the top of the circle?

1) (mv² / R) -mg

2) mv²/ R

3) 0

4) mg

If a mixture containing 3 moles of hydrogen and 1 mole of nitrogen is converted completely into ammonia, the ratio of initial and final volumes at the same temperature and pressure would be : 

1) 1:2
2) 2:1
3) 1:3
4) 3:1

How many stereoisomers are therefor tartaric acid?

1) 2
2) 3
3) 4
4) 5

 In the coils and magnets lab, why did we zero the gaussmeter inside the iron pipe?

(1) To eliminate the systematic error of a zero offset.

(2) To measure the perpendicular component of the earth’s magnetic field.

(3) To offset the systematic error of the earth’s magnetic field.

(4) To estimate the error that arises with the uncertainty in distance.

Clitellium in Earth worm is situated in
1. 13, 14, and 15th segments
2. 14, 15, 16 th segments
3. 15, 16, 17 th segments
4. 19, 20, 21st segments

The food in onion is stored in the form of
1) sugar
2) cellulose
3) starch
4) protein

In a hydrocarbon, the mass of hydrogen to carbon is 1:3. The empirical formula of the hydrocarbon is

1) CH
2) CH₂
3) CH₄
4) C₂H

Bradycardia is caused when-

(1) Heart beats exceed to more than 1OO per minute

(2) Heart beats reduced to less than 6O per minute

(3) Heart beats exceed to more than 8O per minute

(4) None of these