Other Chemistry · JEE Main previous year questions

650 questions asked across 20 exam years, newest first

Other Chemistry has appeared 650 times in JEE Main papers between 2002 and 2026, about 4.7 questions per paper, from 25 per paper in 2002 to 2.6 per paper in 2026. Every question is listed below with its answer and the paper it came from. Use Practise this topic to attempt them as a timed set.

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2023 96 questions

Q702023 · 8 Apr 2023 · Shift 2
1. A.
2. B.
3. C.
4. D.
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Answer: A
Q742023 · 8 Apr 2023 · Shift 2
Which of the following have same number of significant figures? A. 0.00253 B. 1.0003 C. 15.0 D. 163 Choose the correct answer from the options given below
1. A.A, C and D only
2. B.B and C only
3. C.A, B and C only
4. D.C and D only
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Answer: A
Q782023 · 8 Apr 2023 · Shift 2
In Hall - Heroult process, the following is used for reducing $A l_{2} O_{3}$ :-
1. A.Magnesium
2. B. $Ca F_{2}$
3. C.Graphite
4. D. $N a_{3} Al F_{6}$
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Answer: C
Q802023 · 8 Apr 2023 · Shift 2
Which of the following can reduce decomposition of $H_{2} O_{2}$ on exposure to light :
1. A.Urea
2. B.Glass containers
3. C.Alkali
4. D.Dust
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Answer: A
Q902023 · 8 Apr 2023 · Shift 2· Numerical answer
Coagulating value of the electrolytes $AlC l_{3}$ and $NaCl$ for $A s_{2} S_{3}$ are $0.09$ and $50.04$ respectively. The coagulating power of $AlC l_{3}$ is $x$ times the coagulating power of $NaCl$ . The value of $\underline{x}$ is ____.
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Answer: 556
Q672023 · 6 Apr 2023 · Shift 1
Match List I with List II | LIST I (Oxide) | LIST II (Type of bond) | | :--- | :--- | | A. $N_{2} O_{4}$ | I. $1 N = O bond$ | | B. $NO_{2}$ | II. $1 N - O - N bond$ | | C. $N_{2} O_{5}$ | III. $1 N - N bond$ | | D. $N_{2} O$ | IV. $1 N = N / N \equiv N bond$ | Choose the correct answer from the options given below:
1. A.A-II, B-I, C-III, D-IV
2. B.A-III, B-I, C-II, D-IV
3. C.A-III, B-I, C-IV, D-II
4. D.A-II, B-IV, C-III, D-I
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Answer: B
Q682023 · 6 Apr 2023 · Shift 1
The difference between electron gain enthalpies will be maximum between :
1. A.Ar and Cl
2. B.Ne and Cl
3. C.Ne and F
4. D.Ar and F
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Answer: B
Q772023 · 6 Apr 2023 · Shift 1
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 $\sim 1.5 \times 1 0^{- 3} pm$ 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. A.Both A and R are correct and R is the correct explanation of A
2. B.A is correct but R is not correct
3. C.A is not correct but R is correct
4. D.Both A and R are correct but R is NOT the correct explanation of A
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Answer: D
Q812023 · 6 Apr 2023 · Shift 1· Numerical answer
Number of bromo derivatives obtained on treating ethane with excess of $Br_{2}$ in diffused sunlight is ________
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Answer: 9
Q822023 · 6 Apr 2023 · Shift 1· Numerical answer
The wavelength of an electron of kinetic energy $4.50 \times 1 0^{- 29} J$ is ________ $\times 1 0^{- 5} m$ . (Nearest integer) Given : mass of electron is $9 \times 1 0^{- 31} kg$ , $h = 6.6 \times 1 0^{- 34} J s$
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Answer: 7
Q832023 · 6 Apr 2023 · Shift 1· Numerical answer
The number of species from the following which have square pyramidal structure is ________ $PF_{5}, BrF_{4}^{-}, IF_{5}, BrF_{5}, XeOF_{4}, ICl_{4}^{-}$
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Answer: 3
Q862023 · 6 Apr 2023 · Shift 1· Numerical answer
The value of $lo g K$ for the reaction $A ⇌ B$ at $298 K$ is ________. (Nearest integer) Given: $Δ H^{\circ} = - 54.07 kJ mol^{- 1}$ $Δ S^{\circ} = 10 J K^{- 1} mol^{- 1}$ (Take $2.303 \times 8.314 \times 298 = 5705$ )
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Answer: 10
Q662023 · 6 Apr 2023 · Shift 2
Which one of the following elements will remain as liquid inside pure boiling water?
1. A.Li
2. B.Br
3. C.Cs
4. D.Ga
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Answer: D
Q682023 · 6 Apr 2023 · Shift 2
Group-13 elements react with $O_{2}$ in amorphous form to form oxides of type $M_{2} O_{3}$ ( $M = element$ ). Which among the following is the most basic oxide?
1. A. $A l_{2} O_{3}$
2. B. $T l_{2} O_{3}$
3. C. $B_{2} O_{3}$
4. D. $G a_{2} O_{3}$
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Answer: B
Q722023 · 6 Apr 2023 · Shift 2
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: B
Q752023 · 6 Apr 2023 · Shift 2
The volume of $0.02 M$ aqueous $HBr$ required to neutralize $10.0 mL$ of $0.01 M$ aqueous $Ba (OH)_{2}$ is (Assume complete neutralization)
1. A. $7.5 mL$
2. B. $5.0 mL$
3. C. $10.0 mL$
4. D. $2.5 mL$
Show answer
Answer: C
Q782023 · 6 Apr 2023 · Shift 2
Structures of $BeC l_{2}$ in solid state, vapour phase and at very high temperature respectively are :
1. A.Polymeric, Dimeric, Monomeric
2. B.Dimeric, Polymeric, Monomeric
3. C.Polymeric, Monomeric, Dimeric
4. D.Monomeric, Dimeric, Polymeric
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Answer: A
Q792023 · 6 Apr 2023 · Shift 2
The group of chemicals used as pesticide is :
1. A.Dieldrin, Sodium arsinite, Tetrachloroethene
2. B.Aldrin, Sodium chlorate, Sodium arsinite
3. C.DDT, Aldrin
4. D.Sodium chlorate, DDT, PAN
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Answer: C
Q642023 · 1 Feb 2023 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: D
Q702023 · 1 Feb 2023 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: C
Q642023 · 31 Jan 2023 · Shift 1
$Nd^{2 +} =$
1. A. $4 f^{4} 6 s^{2}$
2. B. $4 f^{3}$
3. C. $4 f^{4}$
4. D. $4 f^{2} 6 s^{2}$
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Answer: C
Q682023 · 31 Jan 2023 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: A
Q752023 · 31 Jan 2023 · Shift 1
Match List I with List II | List I | List II | | :--- | :--- | | A. $XeF_{4}$ | I. See-saw | | B. $SF_{4}$ | II. Square-planar | | C. $NH_{4}^{+}$ | III. Bent T-shaped | | D. $BrF_{3}$ | IV. Tetrahedral | Choose the correct answer from the options given below :
1. A.A - II, B - I, C - III, D - IV
2. B.A - II, B - I, C - IV, D - III
3. C.A - IV, B - I, C - II, D - III
4. D.A - IV, B - III, C - II, D - I
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Answer: B
Q632023 · 31 Jan 2023 · Shift 2
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: B
Q762023 · 31 Jan 2023 · Shift 2
Given below are two statements : Statement I : $H_{2} O_{2}$ is used in the synthesis of Cephalosporin Statement II : $H_{2} O_{2}$ is used for the restoration of aerobic conditions to sewage wastes. In the light of the above statements, choose the most appropriate answer from the options given below :
1. A.Statement I is incorrect but Statement II is correct
2. B.Statement I is correct but Statement II is incorrect
3. C.Both Statement I and Statement II are incorrect
4. D.Both Statement I and Statement II are correct
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Answer: D