List of top Chemistry Questions asked in VITEEE

For hydrogen-oxygen fuel cell, the cell reaction is \(2H_2(g)+O_2(g)\rightarrow2H_2O(I)\), If \(\triangle{G}\degree_{f}(H_2O)=-237.2KJmol^{-1}\) then emf ofthis cell is

One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. Then $ {\Delta S (cal \, deg^{-1} \, mol^{-1})}$ for this process is : $ { (R = 2 \, cal \, K^{-1} \, mol^{-1})}$

An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces of the cube. The empirical formula for this compound would be

The protein present in the hair is

Phenol undergoes electrophilic substitution more easily than benzene because

Esterification of acid chloride with ethanol is usually carried out in the presence of pyridine. The function of pyridine is

Group 15 elements have more electron gain enthalpy than group 16-elements. The correct reason for this is

$X Cl _{2}( excess )+Y Cl _{2} X Cl _{4}+Y \downarrow$ $Y O {->[{\Delta}][{>400^{\circ} C }]} \frac{1}{2} O _{2}+Y$ Ore of Y would be ,

The rate constant of the reaction \( A \rightarrow B \) at different times are given below: \[ \text{Concentration (M)} \quad \text{Time (Minutes)}
0.069 \quad 0 \quad 0.052 \quad 17 \quad 0.035 \quad 34 \quad 0.018 \quad 51 \] The rate constant of the reaction according to the correct order of reaction is

\( X' \) and \( Y' \) respectively are

A compound which gives a negative test with ninhydrin, it cannot be a protein or an amino acid. As, it gives a positive test with Benedict’s solution. The compound is

In the Cannizzaro reaction given below: \[ 2Ph - CHO \xrightarrow{\text{NaOH}} Ph - CH_2OH + Ph - CO_2 \] the slowest step is

Which of the following reactions is used to prepare isobutane?

The reaction of 1-bromo-3-chlorocyclobutane with metallic sodium in dioxane under reflux conditions gives

The compound used for making super glue or crazy glue is

Identify \( Z \) in the following reaction sequence \[ CH_3CH_2CH_2OH \xrightarrow{H_2SO_4, 160^\circ C} CH_3CH_2CH = CH_2 \xrightarrow{NaNH_2} Z \]

The dissolution of \( Al(OH)_3 \) by a solution of NaOH results in the formation of

With excess of water, both \( P_2O_5 \) and \( PCl_5 \) give

The ratio of slopes of \( K_{\text{max}} \) vs \( V \) and \( V_0 \) vs \( v \) curves in the photoelectric effect gives

The concentrations of the reactant A in the reaction \( A \rightarrow B \) at different times are given below Concentration (M) \quad Time (Minutes) \[ 0.069 \quad 0 \quad 0.052 \quad 17 \quad 0.035 \quad 34 \quad 0.018 \quad 51 \] The rate constant of the reaction according to the correct order of reaction is

Which of the following does not exist?

If the ionisation energy and electron affinity of an element are 275 and 86 kcal/mol respectively, then the electronegativity of the element on the Mulliken scale is

For the preparation of paracetamol

Which one of the following is a case of negative adsorption?

An organic compound having carbon, hydrogen and sulphur contains 4% of sulphur. The minimum molecular weight of the compound is