List of top Chemistry Questions asked in VITEEE

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

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

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

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

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

For the preparation of paracetamol

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?

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

Consider the following changes: \[ M(s) \xrightarrow{} M(g) \quad (1)
M(g) \xrightarrow{} M^{2+}(g) + 2e^- \quad (2)
M(g) \xrightarrow{} M^+(g) + e^- \quad (3)
M^+(g) \xrightarrow{} M^{2+}(g) + e^- \quad (4) \] The second ionisation energy of \( M \) could be determined from the energy values associated with

In keto-enol tautomerism of dicarbonyl compounds, the enol-form is preferred in contrast to the keto-form, this is due to

In benzene, the triple bond consists of

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

Point out incorrect stability order

The false statements among the following are I. A primary carbocation is less stable than a tertiary carbocation.
II. A secondary propyl carbocation is less stable than allyl carbocation.
III. A tertiary free radical is more stable than a primary free radical.
IV. Isopropyl carbocation is more stable than ethyl carbocation.

Caffeine has a molecular weight of 194.1 g/l. It contains 28.9% by mass of nitrogen, number of atoms of nitrogen in one molecule of caffeine is

The IUPAC name of

A colourless water soluble solid \( A \) on heating gives equimolar quantities of \( B \) and \( C \). B gives dense white fumes with HCl and C does so with NH\(_3\). B gives brown precipitate with Nessler’s reagent and C gives white precipitate with nitrates of \( Ag^+ \), \( Pb^{2+} \) and Hg\(^{2+} \). A is

Which two sets of reactants best represent the amphoteric character of \( Zn(OH)_2 \)? Set I \( Zn(OH)_2(s) \) and \( OH^-(aq) \)
Set II \( Zn(OH)_2(s) \) and \( H_2O(l) \)
Set III \( Zn(OH)_2(s) \) and \( H^+(aq) \)
Set IV \( Zn(OH)_2(s) \) and \( NH_3(aq) \)

A compound \( X \) on heating gives a colourless gas. The residue is dissolved in water to obtain \( Y \). Excess \( CO_2 \) is passed through aqueous solution of \( Y \) when \( Z \) is formed. \( Z \) on gentle heating gives back \( X \). The compound \( X \) is

A and B respectively are

An alloy of copper, silver and gold is found to have copper atom constituting the ccp lattice. If silver atoms occupy the edge centres and gold atoms are present at body centres, the alloy has a formula

A and B respectively are