NEET Chemistry - MCQ Practice Questions
Chemistry is the section where NEET candidates can gain the most in the least time, provided the three branches are revised as three separate habits. This set covers physical chemistry calculations, organic reactions and mechanisms, and inorganic chemistry including periodic properties, chemical bonding and coordination compounds. Organic questions show the mechanism step by step so the logic carries over to unfamiliar reactions.
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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.