List of practice Questions

The vapour pressure of a solvent decreased by 10 mm o f mercury when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent if the decrease in the vapour pressure is to be 20 mm o f mercury?
IUPAC name of $\left[ Pt \left( NH _{3}\right)_{3}( Br )\left( NO _{2}\right) Cl \right] Cl$ is
The velocity of an electron in the innermost orbit of an atom is :
A heavy ball is thrown on a rough horizontal surface in such a way that it slides with a speed ($v_o$) initially without rolling. It will roll without sliding when its speed falls to:
When 2 equal resistances are connected in parallel to the poles of a cell of negligible internal resistance, the power developed is P. When the same resistances are connected in series across the same cell, the power developed is
Acetic acid reacts with $PCl_5$ to form
A transverse wave is represented by the equation $y=y_0 \sin\frac{2\pi}{\lambda}(vt-x)$ For what value of $\lambda$, is the maximum particle velocity equal to two times the wave velocity?
Which of the following has highest first ionization potential ?
Susceptibility of a magnetic substance is found to depend on temperature and the strength of the magnetising field. The material is a
An n-digit number is a positive number with exactly n digits. Nine hundred distinct n-digit numbers are to be formed using only the three digits 2,5 and 7. The smallest value of n for which this is possible, is
Restriction endonucleases
The angular velocity of a body changes, from $ {{\omega }_{1}} $ to $ {{\omega }_{2}} $ without applying torque but by changing moment of inertia. The ratio of initial radius of gyration to the final radius of gyration is :
Aspirin is an acetylation product of
A device, in which electrical energy is converted into chemical energy, is called:
Device used to measure very high temperature is
A bullet is fired from a gun. The force on the bullet is given by $F=600-(2\times10^5)t$ where, F is in newton and t in seconds. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet?
In the reaction, $4NH_3 (g) + 5O_2 \rightarrow 4NO(g) + 6H_2O (I)$ When 1 mole of ammonia and 1 mole of $O_2$ are made to react to completion, then
The hormone that stimulates the stomach to secrete gastric juice is
The second order Bragg diffraction of X-rays with $\lambda = 1.0 \mathring{A}$ from a set of parallel planes in a metal occurs at an angle $60^\circ$. The distance between the scattering planes in the crystals is
A shell, in flight, explodes into four unequal parts. Which of the following is conserved?
Three equal resistors connected in series across a source of e.m.f. together dissipate 10 watt of power. What will be the power dissipated in watt if the same resistors are connected in parallel across the same source of e.m.f. ?
The Activation energy of a chemical reaction can be determined by
A 5% solution of cane sugar (MW = 342) isisotonic with 1% solution of substance X. The molecular weight of X is
Which one is not paramagnetic among the following? [at. no. of $Be = 4, N e = 10$ , $A s= 33,Cl= 17$]
Two bodies of masses m and 4m are moving with equal kinetic energies. The ratio of their linear momenta is