JEE Main 2024 · 6 Apr 2024 Shift 2

Molality (m) of 3 M aqueous solution of NaCl is : (Given : Density of solution =1.25 g mL⁻¹, Molar mass in g mol⁻¹ : Na-23, Cl-35.5)

1. A2.79 m
2. B3.85 m
3. C2.90 m
4. D1.90 m

Given below are two statements : Statement I : PF₅ and BrF₅ both exhibit sp³d hybridisation. Statement II : Both SF₆ and [Co(NH₃)₆]³⁺ exhibit sp³d² hybridisation. 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

The ratio Kₚ/K꜀ for the reaction : CO₍g₎ + 1/2 O₂₍g₎ ⇌ CO₂₍g₎ is :

1. A1/√RT
2. B(RT)¹/²
3. CRT
4. D1

How can an electrochemical cell be converted into an electrolytic cell ?

1. AExchanging the electrodes at anode and cathode.
2. BReversing the flow of ions in salt bridge.
3. CApplying an external opposite potential lower than E⁰cell.
4. DApplying an external opposite potential greater than E⁰cell.

The number of ions from the following that are expected to behave as oxidising agent is : Sn⁴⁺, Sn²⁺, Pb²⁺, Tl³⁺, Pb⁴⁺, Tl⁺

1. A3
2. B2
3. C4
4. D1

Arrange the following elements in the increasing order of number of unpaired electrons in it.

1. ASc
2. BCr
3. CV
4. DTi
5. EMn Choose the correct answer from the options given below :

The correct IUPAC name of [PtBr₂(PMe₃)₂] is :

1. Adibromobis(trimethylphosphine)platinum(II)
2. Bbis(trimethylphosphine)dibromoplatinum(II)
3. Cdibromodi(trimethylphosphine)platinum(II)
4. Dbis[bromo(trimethylphosphine)]platinum(II)

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in NH₄OH solution when sodium carbonate extract was first acidified with dil. HNO₃ and then AgNO₃ solution was added. This indicates presence of :

1. ACl⁻
2. BBr⁻
3. CI⁻
4. DCO₃²⁻