List of top Chemistry Questions asked in JEE Advanced

The correct statement(s) about the compound given below is/are

Extraction of zinc from zinc blende is achieved by

Consider a titration of potassium dichromate with acidified Mohr?s salt solution using diphenylamine as indicator. The number of moles of Mohr?s salt required per mole of dichromate is :

In the following reaction, The produce X is

The compound(s) formed upon combustion of sodium metal in excess air is (are)

Among the following metal carbonyls, the $C-O$ bond order is lowest in

Among the following, the least stable resonance structure is

A solution of a metal ion when treated with $KI$ gives a red precipitate which dissolves in excess $KI$ to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

The percentage of $p$-character in the orbitals forming $P-P$ bonds in $P_4$ is

The reaction ${B(OH)_3 + NaOH <=> Na[B(OH)_4]}$ $ { B(OH)_3 + NaOH <=> NaBO_2 + 2 \, H_2O}$ can be made to proceed to forward direction by the addition of

$ CH_3 - CH = CH_2+NOCl \longrightarrow P; $ Identify the adduct.

$ Ag^+ \, + NH_3 \rightleftharpoons [ Ag ( NH_3 ) ]^+ ; K_1 = 3.5 \times 10^{ - 3 } $ $ [ Ag ( NH_3 )]^+ \, + NH_3 \rightleftharpoons [ Ag (NH_3 )_2 ]^+ ; K_2 = 1.7 \times 10^{ - 3 } $ then the formation constant of $ [ Ag (NH_3)_2]^+ $ is...

If the bond length of CO bond in carbon monoxide is $1.128 \mathring{A}, $ then what is the value of CO bond length in $Fe(CO)_5? $

The smallest ketone and its next homologue are reacted with $NH_2OH$ to form oxime

(I) 1, 2-dihydroxy benzene (II) 1, 3-dihydroxy benzene (III) 1, 4-dihydroxy benzene (IV) Hydroxy benzene The increasing order of boiling points of above mentioned alcohols is

$\xrightarrow{Cl_2,hv\, \, }N(isomeric\, products) C_5 H_{11} Cl$ $\xrightarrow{\, \, Fractional\, distillation \, }M(isomeric\, products)$ What are N and M?

$CuSO_4$decolourises on addition of KCN, the product is

A solution when diluted with $H_2 0$ and boiled, it gives a white precipitate. On addition of excess $NH_4 CI / NH_4 0H$, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in $NH_4 OH / NH_4 CI.$

$ MgSO_4 $ on reaction with $ NH_4OH $ and $ Na_2HPO_4 $ forms a white crystalline precipitate. What is its formula?

$MgSO_4$ on reaction with $NH_4 OH $ and $ Na_2 HPO_4$ forms a white crystalline precipitate. What is its formula?

Which of the following pair is expected to exhibit same colour in solution?

Name the structure of silicates in which three oxygen atoms of $[SiO_4]^{4-}$ are shared is

Two forms of D-glucopyranose, are called

Which one of the following statements) is incorrect about order of reaction?

One mole of monoatomic ideal gas expands adiabatieally at initial temperature T against a constant external pressure of I atm from 1 L to 2 L. Find out the final temperature $(R = 0.0821\: atm \: K^{-1}m oI^{-1})$