Other Chemistry · JEE Main previous year questions

650 questions asked across 20 exam years, newest first

Year-wise papers Topic-wise questions

Practise this topic

2022 74 questions

Q732022 · 27 Jun 2022 · Shift 1
Addition of $H_{2} S O_{4}$ to $Ba O_{2}$ produces :
1. A. $BaO$ , $S O_{2}$ and $H_{2} O$
2. B. $BaHS O_{4}$ and $O_{2}$
3. C. $BaS O_{4}$ , $H_{2}$ and $O_{2}$
4. D. $BaS O_{4}$ and $H_{2} O_{2}$
Show answer
Answer: D
Q742022 · 27 Jun 2022 · Shift 1
$BeC l_{2}$ reacts with $LiAl H_{4}$ to give :
1. A. $Be + Li [AlC l_{4}] + H_{2}$
2. B. $Be + Al H_{3} + LiCl + HCl$
3. C. $Be H_{2} + LiCl + AlC l_{3}$
4. D. $Be H_{2} + Li [AlC l_{4}]$
Show answer
Answer: C
Q782022 · 27 Jun 2022 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: A
Q612022 · 27 Jun 2022 · Shift 2
Identify the incorrect statement for $PCl_{5}$ from the following.
1. A.In this molecule, orbitals of phosphorus are assumed to undergo $sp^{3} d$ hybridization.
2. B.The geometry of $PCl_{5}$ is trigonal bipyramidal.
3. C. $PCl_{5}$ has two axial bonds stronger than three equatorial bonds.
4. D.The three equatorial bonds of $PCl_{5}$ lie in a plane.
Show answer
Answer: C
Q682022 · 27 Jun 2022 · Shift 2
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: A
Q712022 · 27 Jun 2022 · Shift 2
1. A.A-IV, B-III, C-II, D-I
2. B.A-IV, B-III, C-I, D-II
3. C.A-II, B-III, C-I, D-IV
4. D.A-IV, B-II, C-III, D-I
Show answer
Answer: A
Q902022 · 27 Jun 2022 · Shift 2· Numerical answer
Show answer
Answer: 12
Q672022 · 26 Jun 2022 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: D
Q692022 · 26 Jun 2022 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: C
Q712022 · 26 Jun 2022 · Shift 1
Which statement is not true with respect to nitrate ion test?
1. A.A dark brown ring is formed at the junction of two solutions.
2. B.Ring is formed due to nitroferrous sulphate complex.
3. C.The brown complex is $[Fe (H_{2} O)_{5} (NO)] SO_{4}$ .
4. D.Heating the nitrate salt with conc. $H_{2} SO_{4}$ , light brown fumes are evolved.
Show answer
Answer: B
Q752022 · 26 Jun 2022 · Shift 1
The correct order of melting point is :
1. A.Be > Mg > Ca > Sr
2. B.Sr > Ca > Mg > Be
3. C.Be > Ca > Mg > Sr
4. D.Be > Ca > Sr > Mg
Show answer
Answer: D
Q782022 · 26 Jun 2022 · Shift 1
Polar stratospheric clouds facilitate the formation of :
1. A. $ClONO_{2}$
2. B. $HOCl$
3. C. $ClO$
4. D. $CH_{4}$
Show answer
Answer: B
Q802022 · 26 Jun 2022 · Shift 1
A chemical which stimulates the secretion of pepsin is :
1. A.Anti histamine
2. B.Cimetidine
3. C.Histamine
4. D.Zantac
Show answer
Answer: C
Q902022 · 26 Jun 2022 · Shift 1· Numerical answer
2.0 g of $H_{2}$ gas is adsorbed on 2.5 g of platinum powder at 300 K and 1 bar pressure. The volume of the gas adsorbed per gram of the adsorbent is ________ mL. (Given : $R = 0.083 L bar K^{- 1} mol^{- 1}$ )
Show answer
Answer: 9960
Q632022 · 26 Jun 2022 · Shift 2
Which of the following elements is considered as a metalloid?
1. A.Sc
2. B.Pb
3. C.Bi
4. D.Te
Show answer
Answer: D
Q672022 · 26 Jun 2022 · Shift 2
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: D
Q742022 · 26 Jun 2022 · Shift 2
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: C
Q612022 · 25 Jun 2022 · Shift 1
Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron? (A) $NO$ (B) $N_{2}$ (C) $O_{2}$ (D) $C_{2}$ (E) $B_{2}$ Choose the most appropriate answer from the options given below :
1. A.(A), (B), (C) only
2. B.(B), (C), (E) only
3. C.(A), (C) only
4. D.(D) only
Show answer
Answer: C
Q722022 · 25 Jun 2022 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: C
Q772022 · 25 Jun 2022 · Shift 1
Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?
1. A. $Be^{2 +}$
2. B. $Mg^{2 +}$
3. C. $Ca^{2 +}$
4. D. $Sr^{2 +}$
Show answer
Answer: D
Q802022 · 25 Jun 2022 · Shift 1
Which one of the following is an example of artificial sweetner?
1. A.Bithional
2. B.Alitame
3. C.Salvarsan
4. D.Lactose
Show answer
Answer: B
Q812022 · 25 Jun 2022 · Shift 1· Numerical answer
The number of $N$ atoms in $681 g$ of $C_{7} H_{5} N_{3} O_{6}$ is $x \times 1 0^{21}$ . The value of $x$ is ( $N_{A} = 6.02 \times 1 0^{23} mol^{- 1}$ ) (Nearest Integer)
Show answer
Answer: 5418
Q842022 · 25 Jun 2022 · Shift 1· Numerical answer
$1 L$ aqueous solution of $H_{2} SO_{4}$ contains $0.02 m mol H_{2} SO_{4}$ . $50%$ of this solution is diluted with deionized water to give $1 L$ solution (A). In solution (A), $0.01 m mol of H_{2} SO_{4}$ are added. Total $m mols of H_{2} SO_{4}$ in the final solution is $\times 1 0^{3} m mols$ .
Show answer
Answer: 0
Q902022 · 25 Jun 2022 · Shift 1· Numerical answer
The distance between $Na^{+}$ and $Cl^{-}$ ions in solid $NaCl$ of density $43.1 g cm^{- 3}$ is $\times 1 0^{- 10} m$ . (Nearest Integer) (Given : $N_{A} = 6.02 \times 1 0^{23} mol^{- 1}$ )
Show answer
Answer: 1
Q652022 · 25 Jun 2022 · Shift 2
The correct order of electron gain enthalpies of Cl, F, Te and Po is
1. A.F < Cl < Te < Po
2. B.Po < Te < F < Cl
3. C.Te < Po < Cl < F
4. D.Cl < F < Te < Po
Show answer
Answer: B