List of practice Questions

Which one of the following is a characteristic feature of cropland ecosystem ?

Which one of the following is incorrect for ideal solution ?

Which one of the following is wrong for fungi ?

Which one of the following statements is wrong ?

You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots ?

Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because

Which of the following depicts the correct pathway of transport of sperms ?

Which of the following combinations should be selected for better tuning of an $L-C-R$ circuit used for communication ?

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins ?

Which is essential for the growth of root tip ?

When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K) :

When an $\alpha$-particle of mass 'm' moving with velocity 'v' bombards on a heavy nucleus of charge 'Ze', its distance of closest approach from the nucleus depends on m as :

Two non-mixing liquids of densities $\rho$ and $ n\rho (n > 1)$ are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length $ pL (p < 1)$ in the denser liquid. The density d is equal to :

Two identical glass $(\mu_g = 3/2)$ equiconvex lenses of focal length $f$ each are kept in contact. The space between the two lenses is filled with water $(\mu_w = 4/3)$. The focal length of the combination is

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at $100^{\circ} C$ , while the other one is at $0^{\circ} C$. If the two bodies are brought into contact, then, assuming no heat loss, the final common temperature is -

Two electrons in the same atomic orbital can be distinguished by their

The ratio of escape velocity at earth $v_e$ to the escape velocity at a planet $v_p$ whose radius and mean density are twice as that of earth is :

The product obtained as a result of a reaction of nitrogen with $CaC_2$ is

A process that makes important difference between $C_3$ and $C_4$ plants is

The principle of competitive exclusion was stated by

The primary producers of the deep-sea hydrothermal vent ecosystem are

The pressure of $H_2$ required to make the potential of $H_2$-electrode zero in pure water at 298 K is

The potential differences across the resistance, capacitance and inductance are $80\, V$, $40\, V$ and $100\, V$ respectively in an $L-C-R$ circuit . The power factor of this circuit is

The potential difference \((V_A - V_B)\) between the points \(A\) and \(B\) in the given figure is