Chemistry

If radius of second Bohr orbit of the He?ion is 105.8pm, what is the radius of third Bohr orbit of Li²⁺ ion?

A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume O₂ gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 LbarK^-1 mol^-1)

In the neutral or faintly alkaline medium, KMnO₄ oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from:

Compound X on reaction with O? followed by Zn/H?O gives formaldehyde and 2-methyl propanal as products. The compound X is:

Find the emf of the cell in which the following reaction takes place at 298 K
Ni(s) + 2Ag⁺(0.001M) → Ni²⁺(0.001M) + 2Ag(s)
(Given that E°cell = 1.05 V, 2.303RT/F = 0.059 at 298 K)

Given below are two statements:

Statement I: In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their respectively with conc. HCl + ZnCl₂, known as Lucas Reagent.
Statement II: Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent

In the light of the above statements, choose the most appropriate answer from the options given below:

Match List -I with List -II

List -I (Ores)
(a) Haematite
(b) Magnetite
(c) Calamine
(d) Kaolinite

List-II (Composition)
(i) Fe₃O₄
(ii) ZnCO₃
(iii) Fe₂O₃
(iv) [Al₂(OH)₄Si₂O₅]

Choose the correct answer from the options given below:

The product formed from the following reaction sequence is:

3O₂(g) ⇌ 2O₃(g)
For the above reaction at 298 K, Kc is found to be 3.0 * 10⁻⁵⁹. If the concentration of O₂ at equilibrium is 0.040M the then concentration of O₃ in M is:

For a first order reaction A → Products, initial concentration of A is 0.1M, which becomes 0.001 after 5 minutes. Rate constant for the reaction min^-1 is: