NEET Chemistry - MCQ Practice Questions

For the reaction 2H₂ + O₂ → 2H₂O, ΔH = -572 kJ/mol. How much heat is released when 4 moles of H₂ react?

The osmotic pressure of a solution at 27°C containing 0.1 mol of solute in 1 L is approximately:

Which colligative property depends on the nature of solute as well as its concentration?

For a first-order reaction with half-life of 69.3 minutes, the rate constant k is:

In electrochemistry, the reduction potential of Cu²⁺/Cu is +0.34 V and Zn²⁺/Zn is -0.76 V at 25°C. What is E°cell for Zn-Cu cell?

The number of orbitals in a subshell with l = 2 is:

For a buffer solution containing equal molar amounts of acetic acid and sodium acetate, if Ka = 1.8 × 10⁻⁵, what is the pH?

An ideal gas undergoes isothermal compression from 10 L to 5 L at constant temperature. The work done ON the gas is:

The Born-Landé equation is used to calculate which property?

For the reaction: PCl₅(g) ⇌ PCl₃(g) + Cl₂(g), if initial pressure of PCl₅ is 1 atm and degree of dissociation is 0.4, what is Kp at constant total pressure?

The standard entropy change (ΔS°) for vaporization of water at 100°C and 1 atm is 108.8 J/(mol·K). What is ΔG° at 100°C?

For a weak acid HA with concentration 0.1 M and Ka = 4 × 10⁻⁶, the degree of ionization is:

The rate constant for a reaction increases by 50% when temperature is increased from 27°C to 37°C. What is the activation energy?

In a galvanic cell, if ΔG° = -95.5 kJ/mol and n = 2, what is E°cell? (F = 96500 C/mol)

A solution contains 342 g of sucrose (M = 342 g/mol) dissolved in 1000 mL of water. The molarity of the solution is:

For the reaction 2H₂ + O₂ → 2H₂O, ΔH° = -572 kJ/mol. The enthalpy change for forming 1 mole of water is:

At constant temperature and pressure, which thermodynamic quantity determines the spontaneity of a reaction?

The rate of reaction doubles when temperature increases from 300 K to 310 K. Calculate the activation energy (Ea) using Arrhenius equation.

What is the cell potential (E°cell) for a galvanic cell with E°cathode = +0.80 V and E°anode = -0.40 V?

A first-order reaction has a rate constant k = 0.693 s⁻¹. Calculate the half-life of this reaction.