List of top Chemistry Questions asked in VITEEE

Among the following molecules, those having the same number of lone pairs on Xe are: (i) \( XeO_3 \) (ii) \( XeOF_4 \) (iii) \( XeF_6 \)

Which compound can exist in a dipolar (zwitter) state?

In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to:

Glucose when heated with \( CH_3OH \) in presence of dry HCl gas gives \( \alpha \)- and \( \beta \)-methyl glucosides because it contains:

The uncertainty in position and velocity of a particle are \( 10^{-10} \, \text{m} \) and \( 5.27 \times 10^{-24} \, \text{ms}^{-1} \) respectively. Calculate the mass of the particle is (h = \( 6.625 \times 10^{-34} \, \text{Js} \)):

Phosphine is generally prepared in the laboratory:

In the reaction, \( C_6H_5OH + NaOH \rightarrow \) (B) \( \rightarrow (C) \), the compound (C) is:

Choose the complex which is paramagnetic:

Calculate the energy needed to convert three moles of sodium atoms in the gaseous state to sodium ions. The ionization energy of sodium is 495 kJ/mol:

The rate constant is doubled when temperature increases from 27°C to 37°C. Activation energy in kJ is:

An organic compound 'A' has the molecular formula \( C_3H_6O \), it undergoes iodoform test. When saturated with dil. HCl it gives 'B' of molecular formula \( C_9H_{14}O \). A and B respectively are:

Which element gives the maximum number of oxides?

The reaction \( 2NO(g) + O_2(g) \rightarrow 2NO_2(g) \) is of first order. If volume of the reaction vessel is reduced to \( \frac{1}{3} \) times, the rate of reaction would be:

Calculate the entropy change in melting 1 mole of ice at 273 K, \( \Delta H_f^o = 6.025 \, \text{kJ/mol} \):

Here Z is

Which are the starting materials for the preparation of the compound shown in the figure?

At low pressure, the van der Waals equation is reduced to:

Copper sulfate solution reacts with KCN to give:

For the reaction \[ \text{H}_2 \text{(g)} + \frac{1}{2} \text{O}_2 \text{(g)} \rightarrow \text{H}_2 \text{O}(\ell), \Delta H = -285.8 \, \text{kJ/mol}^{-1} \] \text{The value of free energy change at 27°C for the reaction is:}

In a closed insulated container, a liquid is stirred with a paddle to increase its temperature. In this process, which of the following is true?

Bragg's law is given by which of the following equation?

A reaction involving \( K_2 \text{Cr}_2 \text{O}_7 \) is treated with hydrogen sulfide. The oxidation number of chromium changes from +3 to +6, +2, or remains unchanged. Which of the following correctly reflects the change in oxidation number?

Deep sea divers use to respire a mixture of:

Tautomerism is net exhibited by:

What is X in the following change?