List of top Chemistry Questions asked in VITEEE

A near $UV$ photon of $300 \,nm$ is absorbed by a gas and then re-emitted as two photons. One photon is red with wavelength of the second photon is

Ketones $[R- \underset{\overset{||}{O}}{C} - R']$ where, $R = R' = $ alkyl group can be obtained in one step by

In a Claisen condensation reaction (when an ester is treated with a strong base)

An organic compound $B$ is formed by the reaction of ethyl magnesium iodide with a substance $A$, followed by treatment with dilute aqueous acid, Compound $B$ does not react with $PCC$ or $PDC$ in dichloromethane. Which of the following is a possible compound for $A$?

Calculate $pH$ of a buffer prepared by adding $10 \,mL$ of $0.10 \,M$ acetic acid to $20\, mL$ of $0.1\, M$ sodium acetate [$pK_a (CH_3COOH) = 4.74]$

Which is more basic oxygen in an ester?

Which of these ions is expected to be coloured in aqueous solution? $I. Fe^{3+} $ $II. Ni^{2+} $ $ III. Al^{3+}$

When $1 \,$ mole of $CO_{2(g)}$ occupying volume $10\,L$ at $27^{\circ}C$ is expanded under adiabatic condition, temperature falls to $150\, K$. Hence, final volume is

The pressure on a square plate is measured by measuring the force on the plate. If the maximum error in the measurement of force and length are respectively $4\%$ and $2\%$, then the maximum error in the measurement of pressure is

What is the EAN of $[Al(C_4O_4)_3]^{3-}$ ?

The density of solid argon is $1.65\, g\, per\, cc$ at - $233^\circ C$. If the argon atom is assumed to be a sphere of radius $1.54 \times 10^{-8}\, cm$, what per cent of solid argon is apparently empty space? $(Ar = 40)$

For the cell reaction $2 Ce^{4+}+Co \rightarrow 2 Ce^{3+}+Co^{3+} ; E^{\circ}_{cell}$ cell is $1.89\, V$. If $E_{Co^{2+}/Co}$ is $- 0.28 \,V$, what is the value of $E^{\circ} _{Ce^{4+}/Ce ^{3+} }$?

Which has the maximum number of molecules among the following ?

What is the value of electron gain enthalpy of $Na^+$ if $IE_1$ of $Na = 5.1 \,eV$ ?

Match List I (Equations) with List II (Types of process) and select the correct option.

In the following reaction, $C_6H_5CH_2Br \ce{->[{(i) \text{Mg,Ether}}][{(ii) H_3O^+}] X }$ the product ' $X$ ' is

Following compounds are given (i) $CH _{3} CH _{2} OH$ (ii) $CH _{3} COCH _{3}$ (iii) $CH _{3}- \underset{\overset{|}{C}H_3}{C}HOH$ (iv) $CH _{3} OH$ Which of the above compound(s) on being warmed with iodine solution and $NaOH$, will give iodoform?

Which one of the following compounds will be most readily dehydrated ?

Which one of the following compounds will be most readily dehydrated ?

Which of the following compound is the most basic ?

The reaction, $2 A(g)+B(g) \rightleftharpoons 3 C(g)+D(g)$ is begun with the concentrations of $A$ and $B$ both at an initial value of $1.00\, M .$ When equilibrium is reached, the concentration of $D$ is measured and found to be $0.25\, M$. The value for the equilibrium constant for this reaction is given by the expression

The pressure exerted by $6.0 \,g$ of methane gas in a $0.03\, m ^{3}$ vessel at $129^{\circ} \,C$ is (Atomic masses: $C =12.01, \,H =1.01$ and $\left.R=8.314\, JK ^{-1} \,mol ^{-1}\right)$

The order of reactivity of phenyl magnesium bromide $(PhMgBr)$ with the following compounds

Some statements about heavy water are given below. (i) Heavy water is used as moderator in nuclear reactors (ii) Heavy water is more associated than ordinary water (iii) Heavy water is more effective solvent than ordinary water Which of the above statements are correct?

Some of the properties of the two species, $NO _{3}^{-}$and $H _{3} O ^{+}$are described below. Which one of them is correct?