List of practice Questions

Which of the following options represents the correct bond order ?
How does the electron gain enthalpies vary across a period and down a group?
A rocket is launched vertically upward from the surface of the earth with an initial velocity of $ 10 \,km/s $ . If the radius of the earth is $ 6400 \,km $ and atmospheric resistance is negligible. Find the distance above the surface of the earth that the rocket will go.
A solid sphere is rolling down an inclined plane. Then, the ratio of its translational kinetic energy to its rotational kinetic energy is
The species which cannot serve as an initiator for the free radical polymerisation, is
Among $P, S, Cl, F$, the elements with most negative and least negative electron gain enthalpy respectively, are
If getting a number greater than $4$ is a success in a throw of a fair die, then the probability of at least $2$ successes in six throws of a fair die is
If the solubility of a sparingly soluble salt $AX _{2}$ is $s\, mol / L$, the solubility product is
The number of $Na$ atom in $46\, g \,Na$ (atomic weight of $Na= 23$) is
Consider boiling water converting into steam. Under this condition, the specific heat of water is
In a cyclic process, the change in the internal energy of a system over one complete cycle
In an $n-p-n$ transistor, $p$ is
Nylon is a
Among second period elements/the correct order for first ionisation enthalpy is
$H A$ is a weak acid. At $25^{\circ} C$, the molar conductivity of $0.02\, M\, H A$ is $150\, \Omega^{-1} cm ^{2} mol ^{-1}$. If its $\Lambda_{ m }^{ o }$ is $300\, \Omega^{-1} cm ^{2} mol ^{-1}$, then equilibrium constant of $H A$ dissociation is
The number of integer value(s) of $k$ for which the expression $ {{x}^{2}}-2(4k-1)x+15{{k}^{2}} $ $ -2k-7>0 $ for every real number $x$ is/are
$K_{p} / K_{c}$ for the reaction $A(g)+2 B_{2}(g) \rightleftharpoons A B_{2}(g)$ is
A satellite revolves around the earth of radius $R$ in a circular orbit of radius $3R.$ The percentage increase in energy required to lift it to an orbit of radius $5R$ is
n-hexane on heating to $773 \,K$ at $10-20$ atmospheric pressure in the presence of oxides of vanadium supported over alumina, yields
Which of the following is incorrect about sky waves?
Which of the following is correct statement about the magnitude of the acceleration $a$ of the particle executing simple harmonic motion?
A gas at high temperature is cooled. The highest temperature at which liquefaction of gas first occurs is called
Two capillary tubes A and B of diameter $1\, mm$ and $2\, mm$ respectively are dipped vertically in a liquid. If the capillary rise in A is 6 cm, then the capillary rise in B is
The compound formed upon combustion of potassium metal in excess air is
Let $A$ and $B$ be points $ (8,\,\,10) $ and $ (18,\,20), $ respectively. If the point $Q$ divides AB externally in the ratio $ 2:3 $ and $M$ is the $S$ mid-point of $AB$, then the length $MQ $ is equal to