JEE Main entrance exam Question Bank Solutions for Chemistry (JEE Main)

These are physical properties of an elements.

1. Sublimation enthalpy
2. Ionisation enthalpy
3. Hydration enthalpy
4. Electron gain enthalpy

The total number of above properties that affect the reduction potential is ______. (Integer answer)

What would be the product when neopentyl chloride reacts with sodium ethoxide?

The relative order of reactivity of acyl derivatives is:

The process with negative entropy change is ______.

A reaction at 1 bar is non-spontaneous at low temperatures but becomes spontaneous at high temperatures. Identify the correct statement about the reaction among the following.

Using the rules for significant figures, the correct answer for the expression `(0.02858 xx 0.112)/(0.5702)` will be ______.

Functional groups Y, –CH = CH₂ and X respectively are ______ and ______ directing.

For the cell process:

\[\ce{Sn(s) + Pb^{+2}(aq) -> Pb(s) + Sn^{+2}(aq)}\]

The ratio of Pb⁺² to Sn⁺² ion concentration for spontaneity is ______.

Given: `"E"_("Sn"^(2+)//"Sn")^0` = − 0.136 V, `"E"_("Pb"^(2+)//"Pb")^0` = − 0.126 V

The major aromatic product C in the following reaction sequence will be:

For the reaction \[\ce{A(g) -> B(g)}\], the value of equilibrium constant at 300 K and 1 atm is equal to 100.0. The value of Δ_rG for the reaction at 300 K and 1 atm in J mol⁻¹ is −xR, where x is ______. (Rounded-off to the nearest integer)

[R = 8.31 J mol⁻¹ K⁻¹ and ln 10 = 2.3]

Assertion A: Sharp glass edge becomes smooth on heating it upto its melting point.

Reason R: The viscosity of glass decreases on melting.

Choose the most appropriate answer from the options given below.

An ionic solid AB₂ isomorphous to the rutile structure (a tetragonal system with the effective number of formula units = 2) has edge lengths of the unit cell of 4Å, 4Å and 7Å. The density of the substance is ______ mg/cc. (if its formula weight is 80. The N_A = 6 × 10²³ and express your answer in mg/cc using four significant digits.)

Ozone on reacting with KI in a neutral medium produces ______.

To produce 1,4-dicyanobutane following reduction is carried out:

\[\ce{2CH2 = CH - CN + 2H+ + 2e- -> NC - (CH2)4) - CN}\]

The current ______ (in Ampere) must be used to produce 162 g of 1, 4-dicyanobutane per hour.

The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by ΔG⁰ = A − BT where A and Bare non-zero constants. Which of the following is true about this reaction?

A diluted solution of sulphuric acid is electrolyzed using a current of 0.10 A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced at STP is ______ cm³. (Nearest integer)

[Given: Faraday constant F = 96500 C mol^–1 at STP, molar volume of an ideal gas is 22.7 L mol^–1]

The end product Y in the sequence of reaction:

\[\ce{RX ->[CN^-] X ->[NaOH] Y}\] is:

A reddish-pink substance on heating gives off a vapour which condenses on the sides of the test tube and the substance turns blue. If on cooling water is added to the residue it turns to original colour. The substance is ______.

Y is:

Alkaline hydrolysis of C₄H₈Cl₂ gives a compound (A) which on heating with NaOH and I₂ produces a yellow precipitate of CHI₃. The compound (A) should be ______.