JEE Main 2025 · 3 Apr 2025 Shift 2

Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of Mg is 24 g mol⁻¹.

1. A0.24 mg
2. B236 mg
3. C235.7 g
4. D2.444 g

For electrons in ‘2s’ and ‘2p’ orbitals, the orbital angular momentum values, respectively are :

1. A0 and √2 h/2π
2. Bh/2π and √2 h/2π
3. C√2 h/2π and 0
4. D0 and √6 h/2π

Given below are two statements: Statement I : When a system containing ice in equilibrium with water (liquid) is heated, heat is absorbed by the system and there is no change in the temperature of the system until whole ice gets melted. Statement II : At melting point of ice, there is absorption of heat in order to overcome intermolecular forces of attraction within the molecules of water in ice and kinetic energy of molecules is not increased at melting point. In the light of the above statements, choose the correct answer from the options given below

1. ABoth Statement I and Statement II are true
2. BBoth Statement I and Statement II are false
3. CStatement I is true but Statement II is false
4. DStatement I is false but Statement II is true

10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a volumetric flask of 100 mL containing 2 moles of HCl and made the volume upto the mark with distilled water. The solution in this flask is :

1. A20 M HCl solution
2. B10 M HCl solution
3. CNeutral solution
4. D0.2 M NaCl solution

The standard cell potential (E°cell) of a fuel cell based on the oxidation of methanol in air that has been used to power television relay station is measured as 1.21 V. The standard half cell reduction potential for O₂ (E°O₂/H₂O) is 1.229 V. Choose the correct statement:

1. AOxygen is formed at the anode.
2. BReduction of methanol takes place at the cathode.
3. CThe standard half cell reduction potential for the reduction of CO₂ (E°CO₂/CH₃OH) is 19 mV
4. DReactants are fed at one go to each electrode.

Consider the following statements related to temperature dependence of rate constants. Identify the correct statements.

1. AThe Arrhenius equation holds true only for an elementary homogenous reaction.
2. BThe unit of A is same as that of k in Arrhenius equation.
3. CAt a given temperature, a low activation energy means a fast reaction.
4. DA and Ea as used in Arrhenius equation depend on temperature.
5. EWhen Ea ≫ RT, A and Ea become interdependent. Choose the correct answer from the options given below:

Given below are two statements: Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes. Statement II : Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes. In the light of above statements, choose the correct answer from the options given below

1. ABoth Statement I and Statement II are true
2. BBoth Statement I and Statement II are false
3. CStatement I is true but Statement II is false
4. DStatement I is false but Statement II is true

The correct orders among the following are Atomic radius : B < Al < Ga < In < Tl Electronegativity : Al < Ga < In < Tl < B Density : Tl < In < Ga < Al < B 1st Ionisation Energy : In < Al < Ga < Tl < B Choose the correct answer from the options given below:

1. AA and C Only
2. BB and D Only
3. CA and B Only
4. DC and D Only