List of practice Questions

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:
Oxyntic cell produces
Taxonomic hierarchy refers to
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
Family is placed between
Which of the following is not an example of perfectly inelastic collision?
Scientific study of diversity of organisms and their evolutionary relationships is
Water is flowing continuously from a tap having an internal diameter $8 \times 10^{-3} m$. The water velocity as it leaves the tap is $0.4 ms ^{-1}$. The diameter of the water stream at a distance $2 \times 10^{-1} m$ below the tap is close to
The end of fragments of DNA molecules are sticky due to
$bcc$ and $hcp$ has same packing efficiency. Both have same number of atoms per unit cell and same arrangement.
The aggregate fruit is formed from
Asthma is characterised by