List of top Chemistry Questions

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

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?

The increasing order of basic strength for the following amines in aqueous phase is (1) aniline (2) triethylamine (3) ammonia (4) triphenylamine

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 correct increasing order of bond order values for the concerned species 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) $

A homogeneous catalytic process among the following is

If 25% of a radioactive element is left after 40 days, then its half life period is

The root means square velocity of hydrogen at $ STP $ is $ 1.83 \times 10^5 \,cm \, sec^{-1} $ and its means free path is $ 1.78 \times 10^{-5} \,cm $ . What will be the collision number at $ STP $ ?

Which one of the following elements has the highest negative value for its electron gain enthalpy?

Osmotic pressure can be increased by

Predict the correct order among the following:

In which of the following molecules, all atoms are coplanar ?

Which of the following biphenyls is optically active ?

During the electrolysis of molten sodium chloride, the time required to produce $0.10$ mol of chlorine gas using a current of $3$ amperes is

Which of the following statements is not correct?

The addition of a catalyst during a chemical reaction alters which of the following quantities ?

Which among the given molecules can exhibit tautomerism?

The reaction can be classified as:

Match items of Column I with the items of Column II and assign the correct code:

Consider the nitration of benzene using mixed conc. $ {H_2SO_4}$ and ${HNO_3}$. If a large amount of ${KHSO_4}$ is added to the mixture, the rate of nitration will be :

Which of the following is an analgesic ?

$ 44.8\, mL $ of a vapour under $ STP $ ( $ P = 1 $ atmosphere, $ T = 273\, K $ ) conditions has a mass of $ 320\, mg $ . This could be the vapour of (assume ideal behaviour for the vapour) (Atomic masses of $ H $ , $ Br $ , $ C $ and $ I $ are respecti- vely $ 1, 80, 12 $ and $ 127 \,g \, mol^{-1} $ )