List of top Chemistry Questions asked in NEET (UG)

Identity Z in the sequence of reactions, $CH_3 CH_2 CH=CH_2 \xrightarrow{HBr/H_2 O_2}Y \xrightarrow{C_2H_5 ON_a}Z$

For a given exothermic reaction, $K_p$ and $K_p'$ are the equilibrium constants at temperatures $T_1$ and $T_2$, respectively. Assuming that heat of reaction is constant in temperature range between $T_1$ and $T_2$, it is readily observed that :-

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from $0.75\, g$ of sample neutralized $10\, mL$ of ${1 \, M \, H_2SO_4}$. The percentage of nitrogen in the soil is :

$Be^{2+}$ is isoelectronic with which of the following ions?

The pair of compounds that can exist together is

Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings?

The reaction of aqueous $KMnO_4$ with $ H_2O_2 $ in acidic conditions gives

Artificial sweetener which is stable under cold conditions only is

Which property of colloids is not dependent on the charge on colloidal particles?

Which of the following will be most stable diazonium salt $(R\, N^{+}_{2}\,X^{-})$ ?

Which of the following will not be soluble in sodium hydrogen carbonate?

Which of the following organic compounds has same hybridisation as its combustion (CO$_2$) product?

Among the following sets of reactants which one produces anisole?

In acidic medium, $H_2O_2 $ changes $ Cr_2O_7^{2-} $ to $CrO_5 $ which has two (-O-O-) bonds. Oxidation state of Cr in $CrO_5 $ is

(a) ${H_2 O_2 + O_3 -> H_2O + 2O_2}$ (b) ${H_2 O_2 + Ag_2O -> 2Ag + H_2O + O_2}$ Role of hydrogen peroxide in the above reactions is respectively -

Using the Gibbs energy change, $\Delta G^\circ = +63.3kJ$ , for the following reaction, $Ag_2CO_3 \rightleftharpoons 2Ag^+_{(aq)}+CO^{2^−}_{3(aq)}$ the $K_{sp}$ of $Ag_2CO_3(s)$ in water at $25^∘$C is ($R=8.314JK^{−1}mol^{−1}$)

Which of the following salts will give highest $ pH $ in water?

Which of the following statements is correct for the spontaneous adsorption of a gas?

Which one of the following species has plane triangular shape?

Nitrobenzene on reaction with conc. $ {HNO_3/H_2SO_4 }$ at $ {80-100^{\circ} C}$ forms which one of the following products ?

The value of Planck's constant is 6.63 × 10^-34 Js. The speed of light is 3 x 10¹⁷ nm s^-1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 x 10¹⁵ s^-1?

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers ?
n = 3, l=1 and m = -1

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20°C to 35°C ? (R = 8.314 J mol^-1 K^-1)

A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be

A reaction having equal energies of activation for forward and reverse reactions has