List of top Chemistry Questions asked in JEE Main

Which one of the following elements will remain as liquid inside pure boiling water?
Ferric chloride is applied to stop bleeding because-
The major product P formed in the given reaction is:
The major product P formed
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The energy required to form \(Mg^{2+}\) from Mg is much higher than that required to produce \(Mg^+\)
Reason R: \(Mg^{2+}\) is small ion and carry more charge than \(Mg^{+}\).
In the light of the above statements, choose the correct answer from the options given below.
In the reaction given below :
The Product X is:
The Product ‘X’ is:
Incorrect method of preparation for alcohols from the following is:
The decreasing order of hydride affinity for following carbocations is:The decreasing order of hydride affinity
Choose the correct answer from the options given below:
The correct order of the number of unpaired electrons in the given complexes is
A. \([Fe(CN)_6]^{3–}\)
B. \([FeF_6]^{3–}\)
C. \([CoF_6]^{3–}\)
D. \([Cr(oxalate)_3]^{3–}\)
E. \([Ni(CO)_4]\)
Choose the correct answer from the options given below:
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Physical properties of isotopes of hydrogen are different.
Reason R: Mass difference between isotopes of hydrogen is very large.
In the light of the above statements, choose the correct answer from the options given below:
Buna-S can be represented as:
Gibbs energy vs T plot for the formation of oxides is given below.
Gibbs energy vs T plot for the formation of oxides

For the given diagram, the correct statement is -
Number of water molecules in washing soda and soda ash respectively are :
In Carius tube, an organic compound ‘X’ is treated with sodium peroxide to form a mineral acid ‘Y’. The solution of \(BaCl_2\), is added to ‘Y’ to form a precipitate ‘Z’. ‘Z’ is used for the quantitative estimation of an extra element. ‘X’ could be
Match List I with List II:

List I - Complex

List II - Crystal Field Splitting energy (△0)

A.[Ti(H2O)6]2+I.– 1.2
B.[V(H2O)6]2+II.– 0.6
C.[Mn(H2O)6]3+III.0
D.[Fe(H2O)6]3+IV.– 0.8
Choose the correct answer from the options given below:
The correct order for acidity of the following hydroxyl compound is:
The correct order for acidity of the following hydroxyl compound
Choose the correct answer from the options given below:
The correct order of metallic character is:
Match List I with List II:

List I

List II

A16 g of CH4 (g)IWeight 28g
B1 g of H2 (g)II60.2 × 1023 electrons
C1 mole of N2 (g)IIIWeighs 32 g
D0.5 mol of SO2 (g)IV Occupies 11.4 L volume at STP
Choose the correct answer from the options given below:
The reaction used for preparation of soap from fat is :
The correct relationships between unit cell edge length ‘a’ and radius of sphere ‘r’ for face-centred and body-centred cubic structures respectively are:

$A \rightarrow B$ The rate constants of the above reaction at $200 K$ and $300 K$ are $0.03 \min ^{-1}$ and $0.05 \min ^{-1}$ respectively The activation energy for the reaction is __$J$ (Nearest integer) (Given $: \ln 10=2.3$ 

$R =8.3 \,JK ^{-1} \,mol ^{-1}$ 

$\log 5=0.70$ 

$\log 3=0.48$ 

$\log 2=0.30)$

For reaction : $SO _2( g )+\frac{1}{2} O _2( g )= SO _3( g )$$K _{ p }=2 \times 10^{12}$ at $27^{\circ} C$ and 1 atm pressure The $K _{ c }$ for the same reaction is ____$\times 10^{13}$ (Nearest integer)(Given $R =0.082 \,L \,atm \,K ^{-1} \,mol ^{-1}$ )

Group-13 elements react with O2 in amorphous form to form oxides of type M2O3 (M = element). Which among the following is the most basic oxide?

The oxidation state of phosphorus in hypophosphoric acid is + _____

When $Cu ^{2+}$ ion is treated with $KI$, a white precipitate, $X$ appears in solution The solution is titrated with sodium thiosulphate, the compound $Y$ is formed $X$ and $Y$ respectively are

Match items of column I and II

Column I (Mixture of compounds)Column II (Separation Technique)
AH2​O/CH2​Cl2​iCrystallization
B
iiDifferential solvent extraction
CKerosene/NaphthaleneiiiColumn chromatography
DC6​H12​O6​/NaClivFractional Distillation