List of practice Questions

The correct order of increasing stabilities for the following carbocations is (1) allyl carbocation (2) neopentyl carbocation (3) benzyl carbocation (4) isobutyl carbocation
The optically inactive compound among the following is
Which of the following oxyacids of sulphur has $ S-O-S $ linkage in its structure?
The equilibrium constant for the following reactions $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g), N_2(g) +O_2(g) \rightleftharpoons 2NO(g)$ and$ H_2(g) + \frac{1}{2} O_2(g) \rightleftharpoons H_2O(1g)$ are K1, K2 and K3 respectively. The equilibrium constant (K) for the reaction
The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
If a and ??are the roots of 4x2 + 2x + 1 = 0, then ??=
A given sample of an ideal gas occupies a volume $V$ at a pressure $P$ and absolute temperature $T$. The mass of each molecule of the gas is $m$. Which of the following gives the density of the gas ?
The slope of the straight line$\frac{ x}{10 }$-$\frac{y }{4 }$ = 3 is
The hybridized state of $Al^{3+}$ in the complex ion formed when $AlCl_3$ is treated with aqueous acid is
Which among the following polymers is non - biodegradable?
In a moving coil galvanometer, the coil having $ 500 $ turns and an average area of $ 4 \,cm^{2} $ carries a current of $ 0.1 \,A $ and is set parallel to a magnetic field with a torque of $ 0.15\, N \,m $ . The strength of the magnetic field is
The kinetic energy of a particle executing simple harmonic motion is $ 1/6^{th} $ of its maximum value at a distance of $ 5 \,cm $ from its equilibrium position. The amplitude of its motion is
An organ pipe open at both ends has fundamental frequency $ f $ in air. If the pipe is dipped vertically in water such that $ 1/4^{th} $ of its length is inside water, then the fundamental frequency of the air column in it is
If $ 25^{th} $ term of an $ A.P. $ is $ 15 $ and if its $ 15^{th} $ term is $ 25 $ , then the $ 40^{th} $ term of the $ A.P. $ is
The density and edge length values for a crystalline element with $ fcc $ lattice are $ 10 \,g \,cm^{-3} $ and $ 400\, pm $ , respectively. The number of unit cells in $ 32 \,g $ of this crystal is
The increasing order of basic strength for the following amines in aqueous phase is (1) aniline (2) triethylamine (3) ammonia (4) triphenylamine
The pair of rigid bodies with mass M and radius R, having the moment of inertia $\frac{MR^{2}}{2}$ can be
The correct increasing order of bond order values for the concerned species is
The operating point of transistor amplifier should be in
A pair of unbiased dice is thrown once. Let $ X $ be the random variable denoting the product of numbers that appear on the two dice. Then $ P\left(X \ge21\right)= $
For a thin lens with radii of curvatures and $ R_{1} $ and $ R_{2} $ , refractive index $ n $ and focal length $ f $ , the factor $ \left(\frac{1}{R_{1}}-\frac{1}{R_{2}}\right) $ is equal to
The electric flux passing through $a$ cube of side $ a $ , which holds a charge $ q $ at one of its corners is
A homogeneous catalytic process among the following is
In the plot of log $ \frac{x}{m} $ $ vs \, log \, p $ for an adsorption, a straight line inclined at an angle of $ \theta=14.04^{\circ} $ to the $ x $-axis was obtained. The $'n'$ value for this adsorption process is $ ( tan \, 14.04^{\circ}=0.25) $
The tuber of potato is a stem structure because it