List of practice Questions

Keto-enol tautomerism is not observed in
The molecule which has zero dipole moment is
The binding energy per nucleon, for nuclei with atomic mass number $A > 100$ decreases with $A$. The nuclear forces are weak for heavier nuclei.
Treatment of acetaldehyde with ethyl magnesium bromide and subsequent hydrolysis gives
With an increase in temperature, surface tension of liquid (except molten copper and cadmium)
Among the following, the formula of saturated fatty acid is
For an opaque body coefficient of transmission is
The correct order of dehydration of alcohols is
The increase in pressure required to decrease the $ 200 \,L $ volume of a liquid by $ 0.008\% $ in $ kPa $ is (Bulk modulus of the liquid $ = 2100 \,MPa $ is)
The units of rate constant for first order reaction are
Which is not an example of common ion effect?
A transformer cannot work on $DC$ supply. $DC$ changes neither in magnitude nor in direction.
Half-life of a radioactive substance is $20$ minute. The time between $20\%$ and $80\%$ decay will be :
The decimal equivalent of the binary number $(11010.101)_2$ is
A ball is projected horizontally with a velocity of $5 \,m/s$ from the top of a building $19.6\, m$ high. How long will the ball take of hit the ground ?
In Young�s double slit experiment, the fringe width is $\beta$. If the entire arrangement is placed in a liquid of refractive index $n$, the fringe width becomes :
Two solid spheres of same metal but of mass $M$ and $8\,M$ fall simultaneously on a viscous liquid and their terminal velocities are $v$ and $nv$, then value of $n$ is
Peroxide ion ___________ a) is diamagnetic b) has five completely filled antibonding molecular orbitals c) is isoelectronic with neon d) has bond order one. Which one of these is correct?
'Water-vascular' system is found in
The speed of a projectile at its maximum height is half of its initial speed. The angle of projection is
Radius of gyration of disc of mass 50 g and radius 2.5 cm about an axis passing through its center of gravity and perpendicular to the plane is
The term parthenogenesis was coined by
If $ 10^{10} $ electrons are acquired by a body every second, the time required for the body to get a total charge of $1 \,C$ will be
$ \int e^{xloga }e^{x} dx $ is equal to
A circuit contains a capacitor and inductance each with negligible resistance. The capacitor is initially charged and the charging battery is disconnected. At subsequent time, the charge on the capacitor will