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

4.0 moles of argon and 5.0 moles of PCl₅ are introduced into an evacuated flask of 100 litre capacity at 610 K. The system is allowed to equilibrate. At equilibrium, the total pressure of mixture was found to be 6.0 atm. The K_p for the reaction is ______. [Given: R = 0.082 L atm K^-1 mol^-1]

A 42.12% (w/v) solution of NaCl causes precipitation of a certain sol in 10 hours. The coagulating value of NaCl for the sol is ______.
[Given: Molar Mass : Na = 23.0 g mol^-1; Cl = 35.5 g mol^-1]

Match List-I with List-II.

Choose the most appropriate answer from the options given below:

Assertion (A): The first ionization enthalpy for oxygen is lower than that of nitrogen.

Reason (R): The four electrons in 2p orbitals of oxygen experience more electron-electron repulsion.
In light of the above statements, choose the correct answer from the options given below.

Match List-I with List-II.

Choose the most appropriate answer from the options given below:

A white precipitate was formed when BaCl₂ was added to extract of an inorganic salt. Farther, 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 ______.

Which is low spin complex?

The major components in "Gun Metal" are ______.

\[\ce{2SO2 (g) + O2 (g) <=> 2SO3 (g)}\]

In an equilibrium mixture, the partial pressures are

`"P"_("SO"_2)` = 43 kPa; `"P"_("O"_2)` = 530 Pa and

`"P"_("SO"_2)` = 45 kPA. The equilibrium constant K_p = _____ × 10^-2. (Nearest integer)

Two salts A₂X and MX have the same value of solubility product of 4.0 × 10⁻¹². The ratio of their molar solubilities i.e., `("S"("A"_2"X"))/("S"("MX")` = ______. (Round off to the Nearest Integer)

The metal mainly used in devising photoelectric cells is ______.

The correct order of hydration enthapies of alkali metal ions is ______.

The major product of the following reaction is:

The major product of the following reaction is:

\[\ce{CH ≡ CH ->[NH4Cl][Cu2Cl2] Product}\]

Product is:

Nitrogen combines with metals to form ______.

Which of the following is a double salt?

The major product of the following reaction is:

The arrangement of oxygen atoms around phosphorus atoms in P₄O₁₀ is ______.

The overall formation constant for the reaction of 6 mol of CN^- with Cobalt (II) is 1 × 10¹⁹. The formation constant for the reaction of 6 mol of CN^- with Cobalt (III) is ______ × 10⁶³. Given that,

\[\ce{CO(CN)^{- 3}_6 + e^-1 -> Co(CN)^{-4}_6}\]

\[\ce{E^{\circ}_{R_p}}\] = 0.83 V

\[\ce{Co^{+3} + e^{- 1} -> Co^{+2}}\]

\[\ce{E^{\circ}_{R_p}}\] = 1.82 V