JEE Main entrance exam Question Bank Solutions for Chemistry (JEE Main)

Among the following which is the best description of water in the solid phase?

A compound 'X' with molecular formula C₃H₈O can be oxidised to a compound 'Y' with the molecular formula C₃H₆O₂ 'X' is most likely to be ______.

Hex-4-ene-2-ol on treatment with PCC gives 'A'. 'A' on reaction with sodium hypoiodite gives 'B', which on further heating with soda lime gives 'C. The compound 'C' is ______.

How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g? [Atomic masses: Na = 23, Cl = 35.5]

Two statements are given below:

Statement I: The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with an odd number of carbon atoms acid immediately below and above it in the series.

Statement II: The solubility of monocarboxylic acids in water decreases with increased molar mass.

Choose the most appropriate option:

Which one of the following acids does not exhibit optical isomerism?

\[\ce{CH3CH2COOH ->[Cl2][red P] A ->[alc. KOH] B}\]. What is B?

Orthorhombic crystal has the following unit cell dimensions ______.

Assertion A: Enol form of acetone [CH₃COCH₃] exists in < 0.1% quantity. However, the enol form the acetyl acetone [CH₃COCH₂OCCH₃] exists in approximately 15% quantity.

Reason R: Enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone.

Choose the correct answer:

A certain element crystallises in a bcc lattice of unit cell edge length 27 A°. If the same element under the same conditions crystallises in the fcc lattice, the edge length of the unit cell in A° will be ______. (Round off to the Nearest Integer).

[Assume each lattice point has a single atom]

When propionamide reacts with Br₂ in the presence of alkali the product is ______.

Na₂CO₃ cannot be used in place of (NH₄)₂CO₃ for the precipitation of the V group because ______.

Gold crystallizes in a face-centered cubic lattice. If the length of the edge of the unit cell is 407 pm. The density of gold assuming it to be spherical is ______ g/cm³. Atomic mass of gold = 197 amu.

The metallic luster exhibited by sodium is explained by ______.

Formic acid and formaldehyde can be distinguished by treating with ______.

Which primitive unit cell has unequal edge lengths (a ≠ b ≠ c) and all axial angles different from 90°?

Hydrogen ion concentration in mol/L in a solution of pH = 5.4 will be ______.

Assuming that the degree of hydrolysis is small, the pH of 0.1 M solution of sodium acetate (K_a = 1.0 × 10⁻⁵) will be ______.

The pH of a 0.02 M NH₄Cl solution will be ______.

[Given: K_b(NH₄OH] = 10⁻⁵ and log 2 = 0.301)

Given below are two statements:

Statement I: The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.

Statement II: Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reactions.

Choose the most appropriate options.