List of practice Questions

The work done on a particle of mass $m$ by a force $K \left[\frac{ x }{\left( x ^{2}+ y ^{2}\right)^{3 / 2}} \hat{ i }+\frac{ y }{\left( x ^{2}+ y ^{2}\right)^{3 / 2}} \hat{ j }\right]$ ( $K$ being a constant of appropriate dimensions, when the particle is taken from the point $( a , 0)$ to the point $(0, a )$ along a circular path of radius a about the origin in the $x$-y plane is

The volume occupied by $ 16\,g $ of oxygen gas at $ STP $ is

The ratio of the radii of the nuclei $ _{13}Al^{27} $ and $ _{52}Te^{125} $ is

The organ of corti is situated on the

The magnitude of the charge on the electron is $ 4.8 \times 10^{-10}\, esu $ . What is the magnitude of the charge on the proton on the nucleus of a helium atom ?

The initial rate of hydrolysis of methyl acetate $(1 M)$ by a weak acid $(HA, 1M) $ is 1/100th of that of a strong acid $(HX, 1M)$, at $ 25^{\circ} C.$ The $ K_a ( H A ) $ is

The electric field in a region is given by $ E=\frac{A}{x^{3}}\,\hat{i}+By\,\hat{j}+Cz^{2}\,\hat{k} $ The $ SI $ units of $ A $ , $ B $ and $ C $ are, respectively

The drug marijuana is obtained from

The degree of ionisation of $HF$ in $0.100\, M$ aqueous solution is (freezing point of the solution $ =-0.197^{\circ} C $ and $ K_{f} $ for water $ =186^{\circ}C) $

The correct sequence of seral stages in hydrosere is

The correct order of electron gain enthalpy with negative sign of $F, Cl, Br$, and $I$, having atomic number $9,17,35$ and $53$ respectively, is

The commonly found tissue in pulp of fruits like guava and in leaves of tea are

The anion $ O^- $ is isoelectronic with

Sucrose is made up of

Principle of paper chromatography is based on

Population growth curve is sigmoid, if the growth pattern is

Predict the correct shape of $ BH_{4}^{-} $ .

Nigrum is one of the species of genus

Kjeldahl method for estimation of nitrogen is not applicable to

Knock knee syndrome occurs due to the pollution of

In which of the following the hydration energy is higher than the lattice energy?

In TCA cycle substrate level phosphorylation takes place during the conversion of

In onion root tip during metaphase stages mitosis the number of kinetiochores will be

In cockroach the flow of haemolymph is

In a new system of units called star units, $ 1\,kg^* = 10 \,kg $ , $ 1 \,m^* =1 \,km $ and $ 1s^* = 1 $ minute, what will be the value of $ 1J $ in the new system ?