In an ecosystem, 10% of energy available for transfer from the trophic level to the next is in the form of:

The laws of reflection hold true for:

A. plane mirrors only B. concave mirrors only

C. convex mirrors only D. all reflecting surfaces

OR

When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. this image is:

A. real B. inverted

C. virtual and inverted D. virtual and erect

At the time of short circuit, the electric current in the circuit:

A. vary continuously B. does not change

C. reduces substantially D. increase heavily

OR

Two bulbs of 100 W and 40 W are connected in series. The current through the 100 W bulb is 1 A. The current through the 40 W bulb will be:

A. 0.4 A B. 0.6 A

C. 0.8 A D. 1 A

Soil fertility is determined by its ability to:

Assertion (A): In a homologous series of alcohols, the formula for the second member is C₂H₅OH and the third member is C₃H₇OH.

Reason (R): The difference between the molecular masses of the two consecutive members of a homologous series is 144.