JEE Main 2024 · 5 Apr 2024 Shift 1

Number of σ and π bonds present in ethylene molecule is respectively :

1. A3 and 1
2. B5 and 1
3. C4 and 1
4. D5 and 2

The following reaction occurs in the Blast furnace where iron ore is reduced to iron metal Fe₂O₃(s) + 3CO(g) ⇌ Fe(l) + 3CO₂(g) Using the Le-chatelier’s principle, predict which one of the following will not disturb the equilibrium.

1. ARemoval of CO
2. BRemoval of CO₂
3. CAddition of CO₂
4. DAddition of Fe₂O₃

The reaction at cathode in the cells commonly used in clocks involves.

1. Areduction of Mn from +7 to +2
2. Breduction of Mn from +4 to +3
3. Coxidation of Mn from +3 to +4
4. Doxidation of Mn from +2 to +7

Molar ionic conductivities of divalent cation and anion are 57 S cm² mol⁻¹ and 73 S cm² mol⁻¹ respectively. The molar conductivity of solution of an electrolyte with the above cation and anion will be :

1. A130 S cm² mol⁻¹
2. B65 S cm² mol⁻¹
3. C260 S cm² mol⁻¹
4. D187 S cm² mol⁻¹

The statement(s) that are correct about the species O²⁻, F⁻, Na⁺ and Mg²⁺.

1. AAll are isoelectronic
2. BAll have the same nuclear charge
3. CO²⁻ has the largest ionic radii
4. DMg²⁺ has the smallest ionic radii Choose the most appropriate answer from the options given below :

Given below are two statements : Statement I : In group 13, the stability of +1 oxidation state increases down the group. Statement II : The atomic size of gallium is greater than that of aluminium. In the light of the above statements, choose the most appropriate answer from the options given below :

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

The number of neutrons present in the more abundant isotope of boron is ‘x’. Amorphous boron upon heating with air forms a product, in which the oxidation state of boron is ‘y’. The value of x + y is ________.

1. A6
2. B3
3. C9
4. D4

The metal that shows highest and maximum number of oxidation state is :

1. AFe
2. BTi
3. CMn
4. DCo