section 1 word limit 30 words Q 1 what do you mean by chemical equilibrium? describe in brief. chemical equilibrium as a state in which the rate of the forward reaction is equal to the rate of the backward reaction. example H2(g) + I2(g) ⇌ 2HI(g) Q 2 differentiates between minerals and ore? Minerals are naturally occurring, homogeneous inorganic solid substances having a definite chemical composition and characteristic crystalline structure, color, and hardness. For example, copper pyrite (CuFeS2), A mineral from which metal can be economically extracted in a maximum amount is called an ore. example Fe2O3 Q 3 EXPLAIN OHM'S LAW? a law stating that electric current is proportional to voltage and inversely proportional to resistance. Q 4 write four applications of solar cell? Transportation, Solar cells in calculators, Solar cell panels, Solar cell advantages. Q 5 Difference between resistance and specific resistance? The ratio of the potential difference between the