List of top Questions asked in KEAM- 2020

The electric potential \(V\) at any point \((x,y,z)\) in space is given by \(V=4xz^2\) volt, where \(x,y,z\) are all in metre. The electric field at that point \((1\text{ m},0,2\text{ m})\) in \(\text{V m}^{-1}\) is

Which one of the following is an antifertility drug?

Which one of the following sets forms the biodegradable polymer?

Which one of the following statements is not correct?

The antimicrobial drug that contains arsenic is

Which one of the following is a greenhouse gas?

The reagent that is used to distinguish between a secondary amine and a tertiary amine is

Which one of the following compounds would undergo Cannizzaro reaction?

Choose the correct statement of the following.

Among the following which one is a non-reducing sugar?

Which one of the following polymer is a copolymer formed by condensation polymerisation?

Which one of the following can be prepared by Gabriel phthalimide synthesis?

The compound that does not undergo hydrolysis by \(S_N1\) mechanism is

Which one of the following is a secondary alcohol?

An organic compound \(A\) with molecular formula \(C_7H_6O\) forms 2,4-DNP derivative and reduces Tollens' reagent. When \(A\) is heated with conc. KOH, it gives sodium benzoate and compound \(B\). The compound \(B\) is

The products obtained by the ozonolysis of 2-methylbut-1-ene are

Which one of the following is not an isomer of 3-methylbut-1-yne?

Which one of the following is a benzenoid aromatic compound?

Which one of the following is an ambidentate ligand?

Which one is not correctly matched?

Which one of the following actinoid has no electron in 6d orbital?

Choose the correct statements about diborane. I. It is prepared by the oxidation of sodium borohydride with iodine. II. It undergoes cleavage reactions with Lewis bases to give borane adducts. III. It is produced on an industrial scale by the reaction of \(BF_3\) with \(LiAlH_4\). IV. It is readily hydrolysed by water to give borazine. V. It burns in oxygen and gives boron trioxide.

The correct formula of dichlorobis(triphenylphosphine) nickel(II) is

The catalyst used in the Wacker process of oxidation of ethyne to ethanal is

An endothermic reaction \(A\rightarrow B\) has an activation energy of 13 kJ mol\(^{-1}\) and the enthalpy change for the reaction is 2 kJ mol\(^{-1}\). The activation energy of the reaction \(B\rightarrow A\) is