List of top Chemistry Questions asked in KEAM

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

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

Benzoic acid when heated with soda ltme yields

Glucose on oxidation with bromine water gives

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

Match the following correctly

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: $Ba\, = 137, S = 32, 0 = 16)$

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

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

When chlorobenzene is reacted with acetyl chloride in the presence of anhydrous AICI$_3$, the major product formed is

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

For a zero order reaction, the plot of concentration of reactant $vs$ time is (intercept refers to concentration axis)

The major product of the reaction between tert-butyl chloride and sodium ethoxide is

Two vessels of volumes $16.4\, L$ and $5\,L$ contain two ideal gases of molecular existence at the respective temperature of $27^?C$ and $227^?C$ and exert $1.5$ and $4.1$ atmospheres respectively. The ratio of the number of molecules of the former to that of the latter is

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:

The donor atom in EDTA are

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

Half-lives of a first order and a zero order reactions are same. Then, the ratio of the initial rates of first order reaction to that of the zero order reaction is

When $SO_2$ gas is passed into aqueous $Na_2CO_3$ the product(s) formed is (are)

The hardest lanthanide element is

Identify the combination of compounds that undergo Aldol condensation followed by dehydration to produce but-$2$-enal

In a polysaccharide, the individual monosaccharides are linked by a:

When 200 mL of aqueous solution of $ HCl $ (pH = 2) is mixed with 300 mL of an aqueous solution of NaOH (pH = 12), the pH of the resulting mixture is