JEE Main 2023 · 6 Apr 2023 Shift 1

A compound is formed by two elements X and Y. The element Y forms cubic close packed arrangement and those of element X occupy one third of the tetrahedral voids. What is the formula of the compound ?

1. AXY₃
2. BX₃Y
3. CX₂Y₃
4. DX₃Y₂

For a concentrated solution of a weak electrolyte (Kₑq = equilibrium constant) A₂B₃ of concentration ‘c’, the degree of dissociation ‘α’ is

1. A(Kₑq/(6c⁵))¹⁄⁵
2. B(Kₑq/(108c⁴))¹⁄⁵
3. C(Kₑq/(5c⁴))¹⁄⁵
4. D(Kₑq/(25c²))¹⁄⁵

The difference between electron gain enthalpies will be maximum between:

1. ANe and F
2. BNe and Cl
3. CAr and F
4. DAr and Cl

Which of the following options are correct for the reaction 2 [Au (CN)₂]⁻(aq) + Zn (s) → 2 Au (s) + [Zn (CN)₄]²⁻(aq)

1. ARedox reaction
2. BDisplacement reaction
3. CDecomposition reaction
4. DCombination reaction Choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Loss of electron from hydrogen atom results in nucleus of ~1.5 × 10⁻³ pm size. Reason R : Proton (H⁺) always exists in combined form. In the light of the above statements, choose the most appropriate answer from the options given below:

1. ABoth A and R are correct and R is the correct explanation of A
2. BBoth A and R are correct but R is NOT the correct explanation of A
3. CA is correct but R is not correct
4. DA is not correct but R is correct

The standard electrode potential of M⁺/ M in aqueous solution does not depend on

1. ASublimation of a solid metal
2. BIonisation of a gaseous metal atom
3. CIonisation of a solid metal atom
4. DHydration of a gaseous metal ion

The setting time of Cement is increased by adding

1. ALimestone
2. BClay
3. CGypsum
4. DSilica

Strong reducing and oxidizing agents among the following, respectively, are

1. ACe⁴⁺ and Eu²⁺
2. BEu²⁺ and Ce⁴⁺
3. CCe³⁺ and Ce⁴⁺
4. DCe⁴⁺ and Tb⁴⁺