List of top Chemistry Questions asked in KEAM

In neutral or faintly alkaline medium, thiosulphate is quantitatively oxidized by $KMnO_4$ to

Arrange the following ions in the order of decreasing X-0 bond length, where X is the central atom in $SiO_4^{4-},ClO_4^- ,PO_4^{3-},SO_4^{2-}$

The crystal field splitting energy for octahedral $(\Delta_0)$ and tetrahedral $(\Delta_t) $complexes is related as

Which one of the following has a different crystal lattice from those of the rest?

Glucose on oxidation with bromine water gives

In the estimation of sulphur by Carius method, $0.480\, g$ of an organic compound gives $0.699 \,g$ of barium sulphate. The percentage of sulphur in this compound is (Atomic masses: $Ba\, = 137, S = 32, 0 = 16)$

The reaction of $ CHC{{l}_{3}} $ and alcoholic $ KOH $ with $ p $ -toluidine gives

Which one of the following amines forms a non-acidic and alkali insoluble product with p-toluenesulphonyl chloride?

Consider the following statements concerning $N_2H_4$ 1. It is an exothermic compound 2. It burns in air with the evolution of heat 3. It has kinetic stability 4. In reduces $Fe^{3+}$ to $Fe^{2+}$ in acidic medium Which of the following combination is correct?

When methane is heated with dioxygen in the presence of $Mo_2O_3$ catalyst, the organic product obtained is

The correct order of ease of cleavage of ether linkage by hydrogen halide follows

Which of the following pairs contain metalloid elements in the periodic table?

Dry air is passed through a solution containing $ 10\,g $ of a solute in $ 90\,g $ of water and then through pure water. The loss in weight of solution is $ 2.5\,g $ and that of pure solvent is $ 0.05 \,g $ . Calculate the molecular weight of the solute.

For a first order reaction, the time taken to reduce the initial concentration by a factor of 1/4 is 20 min. The time required to reduce initial concentration by a factor of 1/16 is

The expression for van der Waals equation for the gas law is

Benzoic acid when heated with soda ltme yields

Match the following correctly

The metal that produces red-violet colour in the non-luminous flame is

In the preparation of potassium permanganate, pyrolusite $ (Mn{{O}_{2}}) $ is first converted to potassium manganate $ ({{K}_{2}}Mn{{O}_{4}}) $ . In this conversion, the oxidation state of manganese changes from:

How many amino acids are present in insulin?

Lassaigne?s test (with silver nitrate) is commonly used to detect halogens such as chlorine, bromine and iodine but not useful to detect fluorin because the product $AgF$ formed is

The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration, K equilibrium is

Neopentyl bromide undergoes dehydrohalogenation to give alkenes even though it has no $\beta$- hydrogen. This is due to

How many molecules of $CO_2$ are formed when one milligram of $100\%$ pure $CaCO_3$ is treated with excess hydrochloric acid?

Which one of the following isomeric amines has the highest boiling point?