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

`"A"_0/2` atoms of X(g) are converted into X⁺(g) by absorbing energy E₁. `"A"_0/2` ions of X⁺(g) are converted into X⁻(g) with release of energy E₂. Hence ionization energy and electron affinity of X(g) are ______.

What happens when steam is passed over red-hot carbon?

The decreasing order of the second ionization potential of K, Ca and Ba is ______.

The presence of primary amines can be confirmed by ______.

\[\ce{(A) ->[Cl2/hv] (B) ->[aq. KOH] (C) ->[O] CH3CHO}\]

Identify A, B and C:

The vapour pressures of two volatile liquids A and B at 25°C are 50 Torr and 100 Torr, respectively. If the liquid mixture contains 0.3 mole fraction of A, then the mole fraction of liquid B in the vapour phase is `x/17`. The value of x is ______.

Galvanization is applying a coating of ______.

What are A and B in the following reaction?

Major product of the reaction is:

Which of the following atoms has the highest first ionization energy?

The complex that has highest crystal field splitting energy (Δ) is ______.

Which of the following is not a correct statement for primary aliphatic amines?

Match List I with List II.

Choose the correct answer from the options given below:

A compound 'X' on treatment with Br₂/NaOH, provided C₃H₉N, which gives positive carbylamine test. Compound 'X' is ______.

Water does not produce CO on reacting with ______.

The metal that gives hydrogen gas upon treatment with both acid as well as base is ______.

During halogen test, sodium fusion extract is boiled with concentrated HNO₃ to ______.

Elevation in boiling point for 1.5 molal solution of glucose in water is 4 K The depression in freezing point of 4.5 molal solution of glucose in water is 4 K. The ratio of molal elevation constant to molal depression constant (K_b/K_f) is ______.

The figure that is not a direct manifestation of the quantum nature of atom is:

If AB₄ molecule is a polar molecule, a possible geometry of AB₄ is ______.