List of practice Questions

How many $ 1\,\mu F $ capacitors must be connected in parallel to store a charge of $1\, C$ with a potential of $110\, V$ across the capacitors?
Most stable carbocation is
In Kjeldahl's method, the nitrogen present is estimated as
Most stable carbocation is
: Methyl cyanide has higher boiling point than methyl isocyanide. : Dipole moment of methyl cyanide is higher than that of methyl isocyanide.
Which one of the following is not made of soft iron?
A bar magnet of magnetic moment $10^{4}\, J / T$ is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of $4 \times 10^{-5}\, T$ to a direction of $60^{\circ}$ from the field will be
Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance. The magnetic forces between two poles do not follow inverse square law of distance.
Which of the following substances magnetic susceptibility $\chi_{m}$ is negative?
Solubility product of ${PbCl_2}$ at ${298\, K}$ is ${1 \times 10^{-6}}$. At this temperature, solubility of ${PbCl_2\, (in\, mol/L)}$ is
If the salts $ M_2X $ , $ QY_2 $ and $ PZ_3 $ have the same solubilities, their $ K_{sp} $ values are related as
Le-Chatelier?s principle is not applicable to
Given a gas phase reaction, $\hspace10mm 2A(g)+B(g) \rightleftharpoons C(g)+D(g)$ Which one of the following changes will affect the value of $K_c$?
The equilibrium constant for mutarotation $\alpha-D \rightleftharpoons \beta-D$ Glucose is $1.8$. What percentage of $\alpha$ form remains at equilibrium?
An acid HA ionises as $HA {\rightleftharpoons} H^{+} + A^{-}$ The pH of 1.0 M solution is 5. Its dissociation constant would be:
A vessel at 1000 K contains $CO_2$ with a pressure of 0.5 atm. Some of the $CO_2$ is converted into CO on the addition of graphite. It the total pressure at equilibrium is 0.8 atm, the value of K is
$K_{sp}$ of $CaSO_4\cdot5H_2O$ is 9 x $10^{-6}$, find the volume for 1 g of $CaSO_4$ (M.wt. = 136).
What is the $pH$ of a $0.5\, M$ aqueous solution of $NH_4Cl$ with $0.2\, M \,NH_3$? $ (pK_a = 9.25)$
A water fountain on the ground sprinkles water all around it. If the speed of water coming out of the fountain is $v$, the total area around the fountain that gets wet is
A particle of mass $m$ is projected with a velocity $\upsilon$ making an angle of 30$^{\circ}$ with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height $h$ is :
A ball rolls of the top of a stair way with a horizontal velocity $ u\,m{{s}^{-1}}. $ If the steps are $ h $ metre high and b metre wide, the ball will hit the edge of the nth step, where $ n $ is
The equation of projectile is $y = ax - bx^2$ where $a$ and $b$ are the constants. Its horizontal range is
Mark the correct option. If a ball is projected with velocity $ {{v}_{o}} $ at an angle of elevation 30?, then
The height $y$ and the distance $x$ along the horizontal plane of a projectile on a certain planet (with no surrounding atmosphere) are given by $y\, = \,(8t - 5t^2 )$ metre and $x = 6t$ metre, where $t$ is in second. The velocity of projection is
Identify the incorrect statement from the following: