NEET problems

513 problems for NEET practice, in Physics, Chemistry and Biology, each with a worked solution. Try each one on paper first, then check your answer.

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1.

A refrigerator keeps its inside at 4 °C in a kitchen at 32 °C.

High School (11–12) · Heat Engines, the Second Law and EntropyJEE Main, NEET, BITSAT, WBJEE, Board ExamStemPy Lab

Medium

2.

For N₂O₄(g) ⇌ 2NO₂(g), Δ H° = +57.2 kJ/mol and Δ S° = +175.8 J/(K mol). New

High School (11–12) · Entropy, Gibbs Energy and SpontaneityJEE Main, NEET, BITSAT, WBJEE, Board Exam, AP, A-Level, IBStemPy Lab

Hard

3.

A pigeon and a garden lizard rest on the same roof. New

High School (11–12) · Chordates and VertebratesNEET, Board ExamStemPy Lab

Hard

4.

A Carnot engine works between 450 K and 306 K.

High School (11–12) · Heat Engines, the Second Law and EntropyJEE Main, NEET, BITSAT, WBJEE, Board Exam, IBStemPy Lab

Medium

5.

A reaction has K = 2.5 × 10⁻³ at 500 K. Find Δ G° at this temperature. New

High School (11–12) · Entropy, Gibbs Energy and SpontaneityNEET, Board Exam, AP, A-Level, IBStemPy Lab

Medium

6.

Place each animal in its class and say what makes it unusual for that class: Ornithorhynchus… New

High School (11–12) · Chordates and VertebratesNEET, Board ExamStemPy Lab

Medium

7.

A gas goes round a cycle of three steps.

High School (11–12) · Heat Engines, the Second Law and EntropyJEE Main, NEET, BITSAT, WBJEE, Board Exam, AP, IB, GaokaoStemPy Lab

Medium

8.

At 298 K a reaction has Δ G° = -17.1 kJ/mol. New

High School (11–12) · Entropy, Gibbs Energy and SpontaneityNEET, Board Exam, AP, A-Level, IBStemPy Lab

Medium

9.

A small zoo has 12 fishes in its aquarium, 5 frogs, 4 tortoises, 2 crocodiles, 7 pigeons and 3 deer. New

High School (11–12) · Chordates and VertebratesNEET, Board ExamStemPy Lab

Medium

10.

Say whether each process is nearly reversible or irreversible, and give a reason.

High School (11–12) · Heat Engines, the Second Law and EntropyNEET, Board ExamStemPy Lab

Medium

11.

Magnesium carbonate decomposes: MgCO₃(s) → MgO(s) + CO₂(g), with Δ H° = +117.6 kJ/mol and Δ S° =… New

High School (11–12) · Entropy, Gibbs Energy and SpontaneityNEET, Board Exam, AP, A-Level, IBStemPy Lab

Medium

12.

In the damp soil of a Kerala garden, Anu finds a long animal with no legs. New

High School (11–12) · Chordates and VertebratesNEET, Board ExamStemPy Lab

Hard

13.

A gas with γ = 1.40 at 5.5 × 10⁵ Pa fills 1.2 litres.

High School (11–12) · Thermodynamic Processes and Specific Heats of GasesJEE Main, NEET, BITSAT, WBJEE, Board ExamStemPy Lab

Hard

14.

For N₂(g) + 3H₂(g) → 2NH₃(g), Δ H° = -92.4 kJ/mol and Δ S° = -198.7 J/(K mol). New

High School (11–12) · Entropy, Gibbs Energy and SpontaneityJEE Main, NEET, BITSAT, WBJEE, Board Exam, AP, A-Level, IBStemPy Lab

Medium

15.

How many gill openings would you see on one side of the head of a lamprey with 7 pairs of gill… New

High School (11–12) · Chordates and VertebratesNEET, Board ExamStemPy Lab

Medium

16.

1.2 mol of a monatomic ideal gas at 450 K expands adiabatically until it has cooled to 310 K.

High School (11–12) · Thermodynamic Processes and Specific Heats of GasesNEET, Board Exam, AP, A-Level, IBStemPy Lab

Medium

17.

Supercooled water freezes at 263 K. Take Δ H = -6.01 kJ/mol and Δ Ssystem = -22.0 J/(K mol). New

High School (11–12) · Entropy, Gibbs Energy and SpontaneityJEE Main, NEET, BITSAT, WBJEE, Board ExamStemPy Lab

Hard

18.

A diver notices that the sharks near a reef keep swimming all the time, while the rohu in a nearby… New

High School (11–12) · Chordates and VertebratesNEET, Board ExamStemPy Lab

Medium

19.

Air (γ = 1.40) at 1.0 × 10⁵ Pa and 290 K is squeezed quickly to 1/12 of its volume.

High School (11–12) · Thermodynamic Processes and Specific Heats of GasesNEET, Board ExamStemPy Lab

Medium

20.

Sulphur trioxide is made by 2SO₂(g) + O₂(g) → 2SO₃(g). New

High School (11–12) · Entropy, Gibbs Energy and SpontaneityNEET, Board Exam, AP, A-Level, IBStemPy Lab

Medium

21.

A sea squirt larva is 2.5 mm long, and its tail, which holds the notochord, makes up 60 % of that… New

High School (11–12) · Chordates and VertebratesNEET, Board ExamStemPy Lab

Medium

22.

0.80 mol of a monatomic ideal gas goes from A to C in two steps.

High School (11–12) · Thermodynamic Processes and Specific Heats of GasesJEE Main, NEET, BITSAT, WBJEE, Board ExamStemPy Lab

Hard

23.

Breaking one mole of CH₄(g) into atoms takes 1665 kJ. New

High School (11–12) · Enthalpy and Hess's LawJEE Main, NEET, BITSAT, WBJEE, Board Exam, AP, A-Level, IB, GaokaoStemPy Lab

Hard

24.

A child finds a starfish ( Asterias ) in a rock pool and calls it a fish. New

High School (11–12) · Non-chordatesNEET, Board ExamStemPy Lab

Hard

25.

1.2 mol of an ideal gas at 310 K is squeezed slowly at a steady temperature from 24 to 6.0 litres.

High School (11–12) · Thermodynamic Processes and Specific Heats of GasesJEE Main, NEET, BITSAT, WBJEE, Board ExamStemPy Lab

Medium