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

Consider the following standard electrode potentials (E° in volts) in aqueous solution:

Based on these data, which of the following statements is correct?

In the ground state of atomic Fe (Z = 26), the spin-only magnetic moment is ______ × 10^-1 BM.
(Round off to the nearest integer).

[Given: `sqrt3 = 1.73, sqrt2 = 1.41`]

Which sodium salt will be heated with soda lime to obtain propane?

The disproportionation of \[\ce{MnO^{2-}_4}\] in acidic medium resulted in the formation of two manganese compounds A and B. If the oxidation state of Mn in B is smaller than that of A, then the spin-only magnetic moment (µ) value of B in BM is ______. (Nearest integer)

The IUPAC nomenclature of an element with electronic configuration [Rn] 5f¹⁴6d¹7s² is ______.

Photochemical smog does not generally contain ______.

Air pollution that occurs in sunlight is ______.

The relation between solubility of a gas in liquid at constant temperature and external pressure is stated by which law?

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

Two isomers (A) and (B) with molar mass 184 g/mol and elemental composition C 52.2%; H 4.9% and Br 42.9% gave benzoic acid and p-bromobenzoic acid, respectively on oxidation with KMnO₄. Isomer ‘A’ is optically active and gives a pale yellow precipitate when warmed with alcoholic AgNO3. Isomer ‘A’ and ‘B’ are, respectively:

2.2 g of nitrous oxide (N₂O) gas is cooled at a constant pressure of 1 atm from 310 K to 270 K causing the compression of the gas from 217.1 mL to 167.75 mL. The change in internal energy of the process, Δ U is '- x' J. The value of 'x' is ______.

(Nearest integer)

(Given: atomic mass of N = 14 g mol^-1 and of O = 16 g mol^-1, Molar heat capacity of N₂O is 100 JK^-1 mol^-1)

Identify products A and B.

Given below are two statements:

Statement I: Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.

Statement II: Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.

In the light of the above statements, choose the most appropriate answer from the options given below.

In the given reaction,

\[\ce{2-Bromo-3, 3-dimethyl butane ->[C2H5OH][\underset{(Major product)}{'A'}]}\] Product A is ______.

Which of the following is Lindlar's catalyst?

The number of nitrogen atoms in a semicarbazone molecule of acetone is ______.

The statement that is not true about ozone is:

Diborane (B₂H₆) reacts independently with O₂ and H₂O to produce, respectively:

Boric acid heated to red hot gives ______.

\[\ce{X + 3NH3 -> Y ->[H^+/H2O]}\]

H₂N–CH₂–COOH, compound X is: