List of practice Questions

A bullet of mass $m$ moving with velocity $v$ strikes a block of mass $M$ at rest and gets embedded into it. The kinetic energy of the composite block will be

The force constants of two springs are $ k_{1} $ and $ k_{2} $ respectively. Both are stretched till their potential energies are equal. The forces $ f_{1} $ and $ f_{2} $ applied on them are in the ratio

Lomasomes are found in:

Calculate $\Delta G^{o}$ for conversion of oxygen? To ozone $3 / 2 O _{2}(g) \rightarrow O _{3}(g)$ at $298 \,K$, if $K_{p}$ for this conversion is $2.47 \times 10^{-29}$ :

Lattice energy is calculated by :

Which of the following is correct?

The enthalpy change for the reaction of $50.00\, mL$ of ethylene with $50.00\, mL$ of $H_2 $ at $1.5\, atm$ pressure is $\Delta H=-0.31\, kJ$. The value of $\Delta E$ will be:

The structural formula of indigo dye is :

In which of the following kingdom diatoms are placed?

In the case of horse pulling a cart, the force that causes the horse to move forward is the force that :

Which of these contains vocal cords?

Which of the following glands is present in frog's skin and not in rabbit's skin?

How many kinds of cells are found in islets of Langerhans?

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