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

Sulphonamides act as ______.

The number of chiral alcohol (s) with molecular formula C₄H₁₀O is ______.

Orlon fibres are made up of ______.

Gaseous cyclobutene isomerizes to butadiene in a first order process which has a 'k' value of 3.3 × 10⁻⁴ s⁻¹ at 153°C. The time in minutes it takes for the isomerization to proceed 40% to completion at this temperature is ______. (Rounded-off to the nearest integer)

A s-block element (M) reacts with oxygen to form an oxide of the formula MO₂. The oxide is pale yellow in colour and paramagnetic. The element (M) is ______.

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:

Assertion A: Size of Bk³⁺ ion is less than Np³⁺ ion.

Reason R: The above is a consequence of the lanthanoid contraction.

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

The major product formed in the following reaction is:

The decomposition of formic acid on gold surface follows first-order kinetics. If the rate constant at 300 K is 1.0 × 10⁻³ s⁻¹ and the activation energy E_a = 11.488 kJ mol⁻¹, the rate constant at 200 K is ______ × 10⁻⁵ s⁻¹. (Round off to the Nearest Integer)

(Given R = 8.314 J mol⁻¹ K⁻¹)

Among the following compounds I - IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. HNO₃ (iii) AgNO₃?

I	II	III	IV

An open beaker of water in equilibrium with water vapour is in sealed container. When a few grams of glucose are added to the beaker of water, the rate at which water molecules ______.

Which of the following compounds will show retention in configuration on nucleophile substitution by OH⁻ ion?

Maltose on treatment with dilute HC?

The number of chiral carbons present in the molecule given below is ______.

\[\ce{X + C + Cl2 ->[High temperature][of about 1000 K] Y + CO}\];

\[\ce{Y + 2H2O -> Z + 2HCl}\]

Compound Y is found in polymeric chain structure and is an electron-deficient Molecule. Y must be:

Gold is extracted by making soluble cyanide complex. The cyanide complex is ______.

A definite volume of H₂O₂ undergoing spontaneous decomposition required 22.8 c.c. of standard permanganate solution for titration. After 10 and 20 minutes respectively the volumes of permanganate required were 13.8 and 8.25 c.c. The time required for the decomposition to be half completed is ______ min.

The reaction \[\ce{SO2Cl2(g) -> SO2(g) + Cl2(g)}\] is a first-order gas reaction with k = 2.2 × 10⁻⁵ sec⁻¹ at 320°C. The percentage of SO₂Cl₂ is decomposed on heating this gas for 90 min, is ______%.

For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for 50% completion is ______. (Integer answer)

Which of the reaction is suitable for concentrating ore by leaching process?

The vapour pressure of solution obtained by mixing 0.2 mol of NaCl in 72g of water at 25°C will be ______ torr.

[Given: vapour pressure of water at 25°C is 24.2 torr]