List of top Chemistry Questions asked in NEET (UG)

Artificial sweetener which is stable under cold conditions only is

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

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

Calculate the energy in joule corresponding to light of wavelength 45 nm (Planck's constant, $h=6.63\times10^{-34}$ Js; speed of light, $c=3\times 10^{8}$.

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

When 22.4 litres of H₂(g) is mixed with 11.2 litres of Cl₂ (g), each at S.T.P., the moles of HCl (g) formed is equal to :

Equal masses of $H_2, O_2$ and methane have been taken in a container of volume V at temperature $27^\circ$C in identical conditions. The ratio of the volumes of gases ${H_2 : O_2 :CH_4}$ would be

(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 -

Among the following complexes, the one which shows zero crystal field stabilisation energy (CFSE) is

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 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

Reason of lanthanoid contraction is

The pair of compounds that can exist together is

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

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 ($R=8.314JK^{−1}mol^{−1}$)

When 22.4 L of $H_{2(g)}$ is mixed with 11.2 L of $Cl_{2(g)}$, each at STP, the moles of $HCl_{(g)}$ formed is equal to

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

Which one of the following species has plane triangular shape?

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

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

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

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

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

Among the following sets of reactants which one produces anisole?

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 :