List of top Chemistry Questions asked in NEET (UG)

Which of the following organic compoundspolymerizes to form the polyester Dacron?

Which of the following orders of ionic radii is correctly represented?

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

Which one of the following is not a commoncomponent of Photochemical Smog?

1.0 g of magnesium is burnt with 0.56 g O₂ in a closed vessel. Which reactant is left in excess and how much? (At. wt. Mg = 24 ; O = 16)

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

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

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

Reason of lanthanoid contraction is

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

Artificial sweetener which is stable under cold conditions only is

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

Which of the following will not be soluble in sodiumhydrogen carbonate?

For the reaction:
\(X_2O4(l) → 2XO_2(g)\)
△U = 2.1 k cal, △S = 20 cal K^–l at 300 K.
Hence △G is

Identify \(Z\) in the sequence of reactions:
\(CH_3CH_2CH=CH_2  \xrightarrow{HBr/H_2O_2}Y \xrightarrow{C_2H_5ONa}Z\)

In the following reaction, the product (A) is :

Using the Gibbs energy change, \(△G° = + 63.3\  kJ\), for the following reaction,
\(Ag_2CO_3 (g) ⇋ 2Ag+ (aq) + CO_3^{2–} (aq)\)
the \(K_{sp}\) of \(Ag_2CO_3 \)(s) in water at \(25°C\) is :
\((R = 8.314\ J K^{–1} mol^{–1})\)

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

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