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 two ends of a conductor to the current flowing through at uniform temperature is called resistance of that conductor.
The unit of resistance is ohm (╬й).
At a fixed temperature amount of resistance offered in the flow of current by a conductor having unit length and unit cross section is called its specific resistance.
The unit of specific resistance is ohm-meter (╬й-m).
Q 6 draw the labeled diagram of flower?
Q 7 write about various parts of the chromosome?
Centromere or primary constriction or kinetochore, chromatids, chromatin, secondary constriction, telomere, chromomere, chromonema, and matrix.Q 8 explain the structure of chloroplast by the diagram?
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