List of top Questions asked in JEE Main

Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium?

Amongst SF₄, XeF₄, CF₄ and H₂O, the number of species with two lone pair of electrons is _____.

A white precipitate was formed when BaCl₂ was added to water extract of an inorganic salt. Further, a gas ‘X’ with characteristic odour was released when the formed white precipitate was dissolved in dilute HCl. The anion present in the inorganic salt is

The correct sequential order of the reagents for the given reaction is

Given below are two statements:
Statement I : The non bio-degradable fly ash and slag from steel industry used by cement industry.
Statement II : The fuel obtained from plastic waste is lead free.
In the light of the above statements, choose the most appropriate answer from the options given below:

The elevation in boiling point for 1 molal solution of non-volatile solute A is 3 K. The depression in freezing point for 2 molal solution of A in the same solvent is 6 K. The ratio of Kb and Kf i.e., \(\frac{K_b}{K_f}\) is 1 : X. The value of X is [nearest integer]

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?

White precipitate of \(AgCl\) dissolves in aqueous ammonia solution due to formation of:

The correct order of nucleophilicity is

Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents?

Manganese (VI) has ability to disproportionate in acidic solution. The difference in oxidation states of two ions it forms in acidic solution is _____.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Fluorine forms one oxoacid.
Reason R: Fluorine has smallest size amongst all halogens and is highly electronegative.
In the light of the above statements, choose the most appropriate answer from the option given below.

Low oxidation state of metals in their complexes are common when ligands :

Which of the following enhances the lathering property of soap?

\(∫^5_0\,cos(π(x-[\frac{x}{2}]))dx \), where [t] denotes greatest integer less than or equal to t, is equal to

The set of values of \(k\), for which the circle \(C : 4x^2 + 4y^2 – 12x + 8y + k = 0\) lies inside the fourth quadrant and the point \(\bigg(1, -\frac{1}{3}\bigg)\) lies on or inside the circle \(C\), is

An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm. The density of the element is 6.0 g cm^–3. The number of atoms present in 180 g of the element is ______× 10²³. (Nearest integer)

Let \(x * y\) = \(x^2 + y^3\) and \((x * 1) * 1\) = \(x * (1 * 1)\). Then a value of \(2 sin^{-1}\bigg(\frac{x^4+x^2-2}{x^4+x^2+2}\bigg)\) is

In the wave equation $y=05 \sin \frac{2 \pi}{\lambda}(400 t-x) m$ the velocity of the wave will be :

Given below are two statements: 
Statement I: The average momentum of a molecule in a sample of an ideal gas depends on temperature. 
Statement II: The rms speed of oxygen molecules in a gas is $v$ If the temperature is doubled and the oxygen molecules dissociate into oxygen atoms, the rms speed will become $2 v$ In the light of the above statements, choose the correct answer from the options given below:

If a point \(A(x, y)\) lies in the region bounded by the \(y\)-axis, straight lines  \(2y + x = 6\) and \(5x – 6y = 30\), then the probability that \(y < 1\) is

The probability that a relation R from {x, y} to {x, y} is both symmetric and transitive, is equal to

Let 

p : Ramesh listens to music. 

q : Ramesh is out of his village. 

r : It is Sunday. 

s : It is Saturday. 

Then the statement “Ramesh listens to music only if he is in his village and it is Sunday or Saturday” can be expressed as