List of practice Questions

Role of bone marrow in mammals is

In a triode valve, grid is used to control the plate current, because:

In a uniform magnetic field of induction B a wire in the form of semicircle of radius r rotates about the diameter of the circle with angular frequency $?$. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R the mean power generated per period of rotation is

In a flowering plant, megaspore develops into an embryo sac, which contains:

In a cell that utilises the reaction $ {Zn(s) + 2H+ (aq) -> Zn2+(aq) + H2(g)}$ addition of $H_2SO_4$ to cathode compartment, will

If on heating liquid through $80^{\circ} C$, the mass expelled is $(1/100)\,th$ of mass still remaining, the coefficient of apparent expansion of liquid is :

If in a diode valve, the plate potential becomes double, then plate current will be:

If $(1 - p)$ is a root of quadratic equation $x^2 + px + (1- p) = 0$, then its roots are

Identify the correct statements regarding enzymes

How much energy is released when 6 moles of octane is burnt in air ? Given $\Delta H_{f}{ }^{\circ}$ for $CO _{2}(g), H _{2} O (g)$ and $C _{8} H _{18}(l)$ respectively are $-490,-240$ and $+160\, J / mol :$

How many $\sigma$ and $\pi$-bonds are in $SO _{4}^{2-}$ ?

$H_2S_2O_7$ has a commercial name as

Flippers of seal are modified :

Fever in malaria is due to

Exotoxins are related with:

Excess of KI reacts with $CuSO_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction?

Double fertilization means

Cosmozoic theory was proposed by:

Codon is present in

The chance of elimination of genes from a small population is an example of

Two organs which are similar in structure and origin, but notnecessarilyin function are called

Tetanus disease is caused by

Green house effect refers to

Capitulum inflorescence is found in

Tongue is under control of