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JEE Exam  >  JEE Test  >  WB Sample Papers, Section Wise & Full Mock Tests 2026  >  WBJEE Chemistry Test - 3 - JEE MCQ

WBJEE Sample Papers, Section Wise & Full Chemistry Test - 3 Free Online


MCQ Practice Test & Solutions: WBJEE Chemistry Test - 3 (40 Questions)

You can prepare effectively for JEE WBJEE Sample Papers, Section Wise & Full Mock Tests 2026 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "WBJEE Chemistry Test - 3". These 40 questions have been designed by the experts with the latest curriculum of JEE 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 60 minutes
  • - Number of Questions: 40

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WBJEE Chemistry Test - 3 - Question 1
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Which one of the following is the weakest Lewis base ?

WBJEE Chemistry Test - 3 - Question 2
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R―CH₂―CH₂ ―OH can be converted into RCH₂CH₂COOH by the following sequence of steps

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WBJEE Chemistry Test - 3 - Question 3
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Schiff's reagent gives pink colour with

WBJEE Chemistry Test - 3 - Question 4
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Which of the nitrates on strong heating leaves the metal as the residue?

WBJEE Chemistry Test - 3 - Question 5
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Which of the following does not show electromeric effect?

WBJEE Chemistry Test - 3 - Question 6
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Which one of the following molecules has the smallest bond angle?

Detailed Solution: Question 6

Molecules      Bond angle
NH3        -       107.2º
PH3        -       93.2º
H2O        -       104.45º
H2Se       -       90.6º
H2S        -       92.1º

WBJEE Chemistry Test - 3 - Question 7
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Concentrated nitric acid is added before proceeding to test for group III members. This is to

WBJEE Chemistry Test - 3 - Question 8
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What is the maximum number of electrons that can be accommodated in an atom in which the highest principal quantum number value is 4?

Detailed Solution: Question 8

To determine the maximum number of electrons that can be accommodated in an atom where the highest principal quantum number (n) is 4, we use the following rules:

  • The principal quantum number (n) indicates the energy level or shell.

  • The maximum number of electrons in a shell is given by the formula: 2n².

  • We calculate the total electrons by summing electrons from all shells up to n = 4.

Step-by-Step Calculation:

  1. Electrons per shell:

    • For n = 1: 2 × (1)² = 2 electrons

    • For n = 2: 2 × (2)² = 8 electrons

    • For n = 3: 2 × (3)² = 18 electrons

    • For n = 4: 2 × (4)² = 32 electrons

  2. Total electrons up to n = 4:

    • 2 + 8 + 18 + 32 = 60 electrons

Verification by orbitals:

  • n = 1:

    • 1s → 2 electrons

  • n = 2:

    • 2s → 2 electrons

    • 2p → 6 electrons

    • Total = 8

  • n = 3:

    • 3s → 2

    • 3p → 6

    • 3d → 10

    • Total = 18

  • n = 4:

    • 4s → 2

    • 4p → 6

    • 4d → 10

    • 4f → 14

    • Total = 32

Add them all:
2 + 8 + 18 + 32 = 60 electrons

Final Answer:

The maximum number of electrons that can be accommodated is 60.

WBJEE Chemistry Test - 3 - Question 9
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In DNA the complementary beses are

WBJEE Chemistry Test - 3 - Question 10
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The heat of formation of the compound in the following reaction is
H₂(g) + Cl(g)→ 2HCl(g)+44 Kcal

WBJEE Chemistry Test - 3 - Question 11
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The equilibrium between water and its vapour, in an open-vessel

Detailed Solution: Question 11

In an open vessel, the water vapour diffuse into air and therefore, the concentration of water vapour above water surface is negligible.
The reverse process of condensation of vapour into liquid form is almost absent.
Therefore, evaporation process continues, till the entire water changes into vapour form.
Therefore, in an open vessel, the water vapour system is never in equilibrium.
Finally the whole water will diffuse into air as water vapour.

WBJEE Chemistry Test - 3 - Question 12
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Parathion is

WBJEE Chemistry Test - 3 - Question 13
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In a reaction 2A + B → A₂B, the reactant A will disappear at

WBJEE Chemistry Test - 3 - Question 14
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Which of the following is not chiral ?

WBJEE Chemistry Test - 3 - Question 15
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What is the entropy change (in J K-1 mol-1), when one mole of ice is converted into water at 0ºC? (The enthalpy change for the conversion of ice to liquid water is 6.0kJ mol-1 at 0ºC)

Detailed Solution: Question 15

WBJEE Chemistry Test - 3 - Question 16
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A metal M readily forms water soluble sulphate MSO₄. Water becomes inert on heating. The hydroxide is soluble in NaOH. Then M is

WBJEE Chemistry Test - 3 - Question 17
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The most stable complex among the following is

WBJEE Chemistry Test - 3 - Question 18
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Air at sea level is dense. This is a practical application of

WBJEE Chemistry Test - 3 - Question 19
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What is formed when boron is heated with concentrated H₂SO₄?

WBJEE Chemistry Test - 3 - Question 20
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Which of the following statement is correct with respect to the property of elements with increase in atomic number in the carbon family(group 14)?

WBJEE Chemistry Test - 3 - Question 21
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Among the following hydrides which is more stable

WBJEE Chemistry Test - 3 - Question 22
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Which one of the following metals reacts with water at room temperature ?

WBJEE Chemistry Test - 3 - Question 23
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The number of optical iosmers of the compound CH₃CHBrCHBrCOOH is

WBJEE Chemistry Test - 3 - Question 24
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The radiation which has highest penetrating power is

WBJEE Chemistry Test - 3 - Question 25
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Aniline reacts with phosgene and KOH to form

WBJEE Chemistry Test - 3 - Question 26
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The product of addition polymerization reaction is

WBJEE Chemistry Test - 3 - Question 27
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Which of the following is used for making horses, shoe heels and stoppers?

WBJEE Chemistry Test - 3 - Question 28
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The oxidation number of Mn in KMnO₄ is

WBJEE Chemistry Test - 3 - Question 29
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In crystal structure of sodium chloride, the arrangement of Cl⁻ ions is

WBJEE Chemistry Test - 3 - Question 30
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What is the number of asymmetric carbon atoms present in α-D-glucopyranose molecule ?

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About this JEE Practice Test

This test contains 40 MCQs on WBJEE Chemistry Test - 3 with detailed solutions for each question. It is part of the WBJEE Sample Papers, Section Wise & Full Mock Tests 2026 course on EduRev, designed to align with the current JEE syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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