List of top Chemistry Questions asked in JEE Main

In which one of the following metal carbonyls, CO forms a bridge between metal atoms?

What is the effect that occurs between lone pair and pi bond?

Which of the following is least iconic

Consider the above reactions, identify product B and product C.

Which one the following compounds will readily react with dilute NaOH?

Given below are two statements :
Statement I: In group 13, the stability of +1 oxidation state increases down the group.
Statement II: The atomic size of gallium is greater than that of aluminium. In the light of the above statements.
Choose the most appropriate answer from the options given below:

Identify the factor from the following that does not affect electrolytic conductance of a solution.

An octahedral complex with the formula \(\text{CoCl}_3n\text{NH}_3\) upon reaction with excess of \(\text{AgNO}_3\) solution gives 2 moles of \(\text{AgCl}\). Consider the oxidation state of Co in the complex is \(x\). The value of "x + n" is ______.

The following reaction occurs in the Blast furnace where iron ore is reduced to iron metal:
\(\text{Fe}_2\text{O}_3(s) + 3\text{CO}(g) \rightleftharpoons 2\text{Fe}(l) + 3\text{CO}_2(g)\)
Using Le Chatelier's principle, predict which one of the following will not disturb the equilibrium.

The molar conductivity for electrolytes A and B are plotted against C^1/2 as shown below. Electrolytes A and B respectively are :

Given below are two statements:
Statement I: On passing HCl$_{(g)}$ through a saturated solution of BaCl$_2$, at room temperature white turbidity appears.
Statement II: When HCl gas is passed through a saturated solution of NaCl, sodium chloride is precipitated due to common ion effect.
In the light of the above statements, choose the most appropriate answer from the options given below:

Methods used for purification of organic compounds are based on :

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Haloalkanes react with KCN to form alkyl cyanides as a main product while with AgCN form isocyanide as the main product.
Reason (R) : KCN and AgCN both are highly ionic compounds. In the light of the above statement
Choose the most appropriate answer from the options given below:

Match List-I with the List-II

List-I Tetrahedral Complex	List-II Electronic configuration
(A) TiCl4	(I) e2, t20
(B) [FeO4]2-	(II) e4, t23
(C) [FeCl4]-	(III) e0, t22
(D) [CoCl4]2-	(IV) e2, t23

Choose the correct answer from the options given below:

The product A formed in the following reaction is:

Compare the energies of following sets of quantum numbers for multielectron system.
(A) n = 4, 1 = 1
(B) n= 4, l = 2
(C) n = 3, l = 1
(D) n = 3, l = 2
(E) n = 4, 1 = 0
Choose the correct answer from the options given below :

The correct arrangement for decreasing order of electrophilic substitution for above compounds

Fuel cell, using hydrogen and oxygen as fuels,
A. has been used in spaceship
B. has as efficiency of 40% to produce electricity
C. uses aluminium as catalysts
D. is eco-friendly
E. is actually a type of Galvanic cell only

Arrange the bonds in order of increasing ionic character in the molecules. LiF, K\(_2\)O, N\(_2\), SO\(_2\), and ClF\(_3\).

The ratio $\frac{K_P}{K_C}$ for the reaction:

Choose the Incorrect Statement about Dalton's Atomic Theory

Find out the final product C

A gas ‘X’ is added to Nessler’s reagent then brown precipitate is formed, gas X is

A container contains 1g H₂ gas and 1g O₂ gas. What is the ratio of partial pressure of H₂ and O₂ (PH₂/PO₂)?

The density of 'x' M solution ('x' molar) of NaOH is \(1.12 \, \text{g/mL}\). While in molality, the concentration of the solution is \(3 \, \text{m}\) (3 molal). Then x is:
Given: Molar mass of NaOH is \(40 \, \text{g/mol}\)