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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2026 44 questions

Q622026 · 24 Jan 2026 · Shift 1
1. A.46
2. B.160
3. C.88
4. D.4
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Answer: A
Q662026 · 24 Jan 2026 · Shift 1
Consider three metal chlorides $x, y$ and $z$ , where $x$ is water soluble at room temperature, $y$ is sparingly soluble in water at room temperature and $z$ is soluble in hot water. $x, y$ and $z$ are respectively
1. A. $AgCl, H g_{2} C l_{2}$ and $PbC l_{2}$
2. B. $CuC l_{2}, AgCl$ and $PbC l_{2}$
3. C. $AlC l_{3}, PbC l_{2}$ and $BaC l_{2}$
4. D. $MgC l_{2}, AgCl$ and $AlC l_{3}$
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Answer: B
Q672026 · 24 Jan 2026 · Shift 1
1. A.A-III, B-IV, C-I, D-II
2. B.A-IV, B-I, C-III, D-II
3. C.A-III, B-IV, C-II, D-I
4. D.A-I, B-II, C-IV, D-III
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Answer: C
Q752026 · 24 Jan 2026 · Shift 1· Numerical answer
X and Y are the number of electrons involved, respectively during the oxidation of $I^{-}$ to $I_{2}$ and $S^{2 -}$ to $S$ by acidified $K_{2} C r_{2} O_{7}$ . The value of $X + Y$ is ____ .
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Answer: 12
Q562026 · 23 Jan 2026 · Shift 1
A cup of water at $5^{\circ} C$ (system) is placed in a microwave oven and the oven is turned on for one minute during which the water begins to boil. Which of the following options is true?
1. A. $q = + v e, w = - v e, Δ U = + v e$
2. B. $q = + v e, w = 0, Δ U = - v e$
3. C. $q = + v e, w = - v e, Δ U = - v e$
4. D. $q = - v e, w = - v e, Δ U = - v e$
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Answer: A
Q662026 · 23 Jan 2026 · Shift 1
1. A. $c < b < a$
2. B. $b < c < a$
3. C. $c < a < b$
4. D. $b < a < c$
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Answer: D
Q702026 · 23 Jan 2026 · Shift 1
Which of the following statements regarding the energy of the stationary state is true in the following one - electron systems ?
1. A. $+ 2.18 \times 1 0^{- 18} J$ for second orbit of $He^{+}$ ion
2. B. $+ 8.72 \times 1 0^{- 18} J$ for first orbit of $He^{+}$ ion
3. C. $- 1.09 \times 1 0^{- 18} J$ for second orbit of H atom.
4. D. $- 2.18 \times 1 0^{- 18} J$ for third orbit of $Li^{2 +}$ ion
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Answer: D
Q742026 · 23 Jan 2026 · Shift 1· Numerical answer
$x mg$ of pure HCl was used to make an aqueous solution. 25.0 mL of 0.1 M $Ba (OH)_{2}$ solution is used when the HCl solution was titrated against it. The numerical value of $x$ is ____ $\times 1 0^{- 1}$ . (Nearest integer) Given : Molar mass of HCl and $Ba (OH)_{2}$ are 36.5 and $171.0 g mol^{- 1}$ respectively.
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Answer: 1825
Q552026 · 23 Jan 2026 · Shift 2
1. A.2
2. B.5
3. C.4
4. D.3
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Answer: D
Q542026 · 22 Jan 2026 · Shift 1
In the reaction, $2Al (s) + 6HCl (aq) \to 2A l^{3 +} (aq) + 6C l^{-} (aq) + 3 H_{2} (g)$
1. A. $12 L HCl (aq)$ is consumed for every $6 L H_{2} (g)$ produced.
2. B. $11.2 L H_{2} (g)$ at STP is produced for every mole of HCl consumed.
3. C. $33.6 L H_{2} (g)$ is produced regardless of temperature and pressure for every mole of Al that reacts.
4. D. $67.2 L H_{2} (g)$ at STP is produced for every mole of Al that reacts.
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Answer: B
Q702026 · 22 Jan 2026 · Shift 1
1. A. $0, 0, - 1, + 1$
2. B. $0, - 1, 0, + 1$
3. C. $0, + 1, 0, - 1$
4. D. $+ 1, 0, 0, - 1$
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Answer: C
Q542026 · 21 Jan 2026 · Shift 1
1. A.
2. B.
3. C.
4. D.
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Answer: D
Q672026 · 21 Jan 2026 · Shift 1
$Mn O_{4}^{2 -}$ , in acidic medium, disproportionates to :
1. A. $Mn O_{4}^{-}$ and MnO
2. B. $Mn O_{4}^{-}$ and $Mn O_{2}$
3. C. $M n_{2} O_{7}$ and $Mn O_{2}$
4. D. $M n_{2} O_{7}$ and MnO
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Answer: B
Q692026 · 21 Jan 2026 · Shift 1
Given below are two statements : Statement I : When an electric discharge is passed through gaseous hydrogen, the hydrogen molecules dissociate and the energetically excited hydrogen atoms produce electromagnetic radiation of discrete frequencies. Statement II : The frequency of second line of Balmer series obtained from $H e^{+}$ is equal to that of first line of Lyman series obtained from hydrogen atom. In the light of the above statements, choose the correct answer from the options given below :
1. A.Both Statement I and Statement II are true
2. B.Statement I is true but Statement II is false
3. C.Statement I is false but Statement II is true
4. D.Both Statement I and Statement II are false
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Answer: A
Q702026 · 21 Jan 2026 · Shift 1
Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and $P Q_{2}$ . When 1 g of $P Q$ is dissolved in 50 g of solvent ' $A^{'}$ , $Δ T_{b}$ was 1.176 K while when 1 g of $P Q_{2}$ is dissolved in 50 g of solvent ' $A^{'}$ , $Δ T_{b}$ was 0.689 K . ( $K_{b}$ of ' $A^{'} = 5 K kg mo l^{- 1}$ ). The molar masses of elements P and Q (in $g mo l^{- 1}$ ) respectively, are :
1. A.25, 60
2. B.60, 25
3. C.65, 145
4. D.70, 110
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Answer: A
Q602026 · 21 Jan 2026 · Shift 2
1. A.
2. B.
3. C.
4. D.
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Answer: D
Q692026 · 21 Jan 2026 · Shift 2
Consider the following spectral lines for atomic hydrogen : A. First line of Paschen series B. Second line of Balmer series C. Third line of Paschen series D. Fourth line of Brackett series The correct arrangement of the above lines in ascending order of energy is :
1. A.D < C < A < B
2. B.A < B < C < D
3. C.D < A < C < B
4. D.C < D < B < A
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Answer: C
Q702026 · 21 Jan 2026 · Shift 2
Aqueous HCl reacts with $Mn O_{2} (s)$ to form $MnC l_{2} (aq), C l_{2} (g)$ , and $H_{2} O (l)$ . What is the weight (in g) of $C l_{2}$ liberated when 8.7 g of $Mn O_{2} (s)$ is reacted with excess aqueous HCl solution? (Given Molar mass in g $mo l^{- 1}$ Mn = 55, Cl = 35.5, O = 16, H = 1)
1. A.14.2
2. B.21.3
3. C.7.1
4. D.71
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Answer: C
Q732026 · 21 Jan 2026 · Shift 2· Numerical answer
The first and second ionization constants of $H_{2} X$ are $2.5 \times 1 0^{- 8}$ and $1.0 \times 1 0^{- 13}$ respectively. The concentration of $X^{2 -}$ in $0.1 M$ $H_{2} X$ solution is ____ $\times 1 0^{- 15} M$ . (Nearest Integer)
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Answer: 100