List of top Chemistry Questions asked in KEAM

The entropy of vaporization of a liquid is $58 \, JK^{-1} \,mol^{-1}$. If $100\, g$ of its vapour condenses at its boiling point of $123^{\circ}C$, the value of entropy change for the process is (Molar mass of the liquid = $58 \,g \,mol^{-1})$

Green chemistry deals with

According to MO theory,

The sugar moiety present in $RNA$ molecule is

Novlac, the linear polymer used in paints is

Which one of the following is not explained by adsorption?

The hybridization of central metal ion in $K_2[Ni(CN)_4]\, and\, K_2[NiCl_4]$ are respectively

Which one of the following data has only four significant figures?

Match the following and choose the correct combination from the options given.

The $t_{\frac{1}{2}}$ for a zero order reaction at the initial concentration of 6x 10M is one minute at $27^{\circ}C$. The rate constant at $27^{\circ}C$ in mol $dm^{-3}s^{-1}$ is

Which one of the following is an example for biodegradable polyester?

Williamson?? synthesis of preparing dimethyl ether is a/an

According to Freundlich adsorption isotherm, the amount of gas adsorbed at very high pressure

One mole of solid iron was vaporized in an oven at its boiling point of 3443 K and enthalpy of vaporization of iron is 344.3 kJ mol$^{-1}$. The value of entropy vaporization (in J mol$^{-1}$) of iron is

Pick out the wrong statement

The repeating unit present in Nylon $6$ is

Which one of the following is not a neurologically active drug?

Two fast moving particles X and Y are associated with de Broglie wavelengths 1 nm and 4 nm respectively. If mass of X is nine times the mass of Y, the ratio of kinetic energies of X and Y would be

Which one of the following is not an allylic halide?

The wavelength (in cm) of second line in the Lyman series of hydrogen atomic spectrum is (Rydberg constant = R cm$^{-1}$)

Which one of the following reaction provides a primary alcohol?

Which of the following compounds are optically active? (i) 3-hydroxypentane$\quad$$\quad$ (ii) 2-aminopropanoic acid (iii) 2-chlorobutane $\quad$$\quad$(iv) 2-methylbutane Choose your answer from the codes given below

The group 13 element that is liquid during summer and used for measuring high temperature is

The element with positive electron gain enthalpy is

One mole of propanone and one mole of formaldehyde are the products of ozonolysis of one mole of an alkene. The alkene may be