List of top Questions asked in JEE Main- 2022

In the following brown complex, the oxidation state of iron is +_____________.

$ {[Fe{({H_2}O)_6}]^{2 + }} + NO \to \mathop {{{[Fe{{({H_2}O)}_5}(NO)]}^{2 + }}}\limits_{\text{Brown complex}} + {H_2}O $

Amongst the following, the number of molecule/(s) having net resultant dipole moment is ____________.

NF₃, BF₃, BeF₂, CHCl₃, H₂S, SiF₄, CCl₄, PF₅

The sugar produced after complete hydrolysis of DNA is

The reagent neutral ferric chloride is used to detect the presence of ______________

Consider the above reaction sequence. Identify the component A and component B :

Blister copper is produced by reaction of copper oxide with copper sulphide.

2Cu₂O + Cu₂S $ \to $ 6Cu + SO₂

When 2.86 $ \times $ 10³ g of Cu₂O and 4.77 $ \times $ 10³ g of Cu₂S are used for reaction, the mass of copper produced is _____________ g. (nearest integer)

(Atomic mass of Cu = 63.5 a.m. u, S = 32.0 a.m. u, O = 16.0 a.m. u)

Consider the given chemical reaction

Identify the product P.

Which among the following will be the major product of the given reaction?

Choose the reaction which is not possible:

Correct formula of the compound which gives a white precipitate with BaCl₂ solution, but not with AgNO₃ solution, is :

A $ \mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}^{573\,K}} $ Red phosphorus $ \mathrel{\mathop{\kern0pt\longrightarrow} \limits_{under\,pressure}^{heat\,;\,803\,K}} $ B

Red phosphorus is obtained by heating "A" at 573 K, and can be converted to "B" by heating at 803 K under pressure.

A and B, respectively, are

$ \Delta $G$ ^\circ $ vs T plot for the formation of MgO, involving reaction

2Mg + O₂ $ \to $ 2MgO, will look like :

The equilibrium constant for the reversible reaction

2A(g) $ \rightleftharpoons $ 2B(g) + C(g) is K₁

$ {3 \over 2} $A(g) $ \rightleftharpoons $ $ {3 \over 2} $B(g) + $ {3 \over 4} $C(g) is K₂.

K₁ and K₂ are related as :

In which of the following half cells, electrochemical reaction is pH dependent?

The correct order of electron gain enthalpy ($ - $ ve value) is :

For a solution of the gases A, B, C and D in water at 298 K, the values of Henry's law constant (K_H) are 30.40, 2.34, 1.56 $ \times $ 10^{$ - $5} and 0.513 k bar respectively. In the given graph, the lines marked as 'p' and 's' correspond respectively to :

The number of radial nodes and total number of nodes in 4p orbital respectively are :

The sum of all the elements of the set {α ∈ {1, 2, …, 100} : HCF(α, 24) = 1} is

The number of 5-digit natural numbers, such that the product of their digits is 36, is _____ .

If the equation of the parabola, whose vertex is at $(5, 4)$ and the directrix is $3x + y – 29 = 0$, is $x^2 + ay^2 + bxy + cx + dy + k = 0$, then $a + b + c + d + k$ is equal to

The reaction of H₂O₂ with potassium permanganate in acidic medium leads to the formation of mainly

As per the given figure, two blocks each of mass $250 \,g$ are connected to a spring of spring constant $2 \,Nm ^{-1}$ If both are given velocity $v$ in opposite directions, then maximum elongation of the spring is :

The electronic configuration of Pt(atomic number 78) is:

Let a line L pass through the point intersection of the lines $bx + 10y – 8 = 0$ and $2x - 3y = 0, \quad b \in \mathbb{R} - \left\{\frac{4}{3}\right\}$. If the line L also passes through the point $(1, 1)$ and touches the circle $17(x^2 + y^2) = 16$, then the eccentricity of the ellipse $\frac{x^2}{5} + \frac{y^2}{5} = 1$ is

The ratio of specific heats

$(\frac{c_p}{c_v}) $

in terms of degree of freedom (f) is given by: