List of top Questions asked in CBSE CLASS XII

If a population growing exponentially double in size in 3 years what is the intrinsic rate of increase (r) of the population?

Integrate the rational function: \(\frac {1}{(e^x-1) }\)

Integrate the rational function: \(\frac {1}{x(x^4-1)}\)

Integrate the rational function: \(\frac {2x}{(x^2+1)(x^2+3)}\)

Integrate the rational function: \(\frac {(x^2+1)(x^2+2)}{(x^2+3)(x^2+4)}\)

Most living organisms cannot survive at temperature above 45°C°. How are some microbes able to live in habitats with temperatures exceeding 100°C?

Integrate the rational function: \(\frac {cos \ x}{(1-sin\ x)(2-sin\ x)}\)

Define phenotypic adaptation. Give one example.

Integrate the rational function: \(\frac {1}{x(x^n+1)}\)

If a marine fish is placed in a fresh water aquarium will the fish be able to survive? Why or why not?

How is diapause different from hibernation?

Integrate the rational function: \(\frac {1}{x^4-1}\)

Integrate the rational function: \(\frac {3x-1}{(x+2)^2}\)

Integrate the rational function: \(\frac {2}{(1-x)(1+x^2)}\)

Integrate the rational function: \(\frac {x^3+x+1}{x^2-1}\)

How do biofertilisers enrich the fertility of the soil?

Integrate the rational function: \(\frac {5x}{(x+1)(x^2-4)}\)

Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer. Biogas, Citric acid, Penicillin and Curd

Integrate the rational function: \(\frac{2x-3}{(x^2-1)(2x+3)}\)

Integrate the rational function: \(\frac{3x+5}{x^3-x^2-x+1}\)

Integrate the rational function: \(\frac{x}{(x+1)(x+2)}\)

Integrate the rational function: \(\frac{x}{(x^2+1)(x-1)}\)

Integrate the rational function: \(\frac{1-x^2}{x(1-2x)}\)

Find out the name of the microbes from which Cyclosporin A (an immunosuppressive drug) and Statins (blood cholesterol lowering agents) are obtained.