A full-length NEET mock in the real pattern: 90 Biology, 45 Physics and 45 Chemistry questions, +4 for a correct answer and −1 for a wrong one. Mock 5 is the same paper for every student, so your rank is among everyone who sat it. Difficulty: 32% easy, 58% medium, 10% hard.
Sample questions from Mock 5 with answers
10 of the 180 questions, with answers and explanations. The rest are in the app.
Question 1
Biology · Biotechnology: Principles and ProcessesRestriction endonucleases are enzymes that:
- A join DNA fragments together
- B cut DNA at specific recognition sequences
- C synthesize new DNA strands
- D degrade RNA only
Answer: B. cut DNA at specific recognition sequences
Why: Restriction endonucleases recognize specific DNA sequences and cut the DNA at or near those sites — a key tool in recombinant DNA technology.
Question 2
Biology · Transport in PlantsThe Casparian strips present in the endodermis of the roots are made of:
- A lignin only
- B suberin, which is impervious to water
- C cellulose
- D pectin
Answer: B. suberin, which is impervious to water
Why: Water has to pass through the cell membrane of the endodermal cells.
Question 3
Biology · Respiration in PlantsThe RQ when the fats are respired is:
- A 0.9
- B about 0.7
- C 1
- D 1.5
Answer: B. about 0.7
Why: Fats need more oxygen for their oxidation.
Question 4
Biology · EvolutionThe theory of spontaneous generation was disproved by the experiments of:
- A Miller
- B Darwin
- C Oparin
- D Louis Pasteur
Answer: D. Louis Pasteur
Why: He showed that life comes from pre-existing life in sterile flasks.
Question 5
Biology · The Living WorldThe classes of the animals with the similar characters are grouped under the:
- A genus
- B family
- C phylum
- D order
Answer: C. phylum
Why: In plants, it is called a division.
Question 6
Physics · AtomsThe shortest wavelength of the Balmer series (the series limit) is about (R = 1.097 × 10⁷ m⁻¹):
- A 820 nm
- B 656 nm
- C 91 nm
- D 365 nm
Answer: D. 365 nm
Why: 1/λ = R/2² for n = ∞, so λ = 4/R = 364.6 nm.
Question 7
Physics · Ray Optics and Optical InstrumentsTwo plane mirrors are inclined at 90° to each other. The number of images of an object placed between them is:
- A 3
- B 4
- C 5
- D 2
Answer: A. 3
Why: n = 360°/θ − 1 = 4 − 1 = 3.
Question 8
Chemistry · HydrocarbonsBenzene reacts with chlorine in the presence of anhydrous FeCl₃ to give:
- A hexachlorobenzene only
- B phenol
- C chlorobenzene (electrophilic substitution)
- D benzene hexachloride
Answer: C. chlorobenzene (electrophilic substitution)
Why: The Lewis acid generates the electrophile Cl⁺.
Question 9
Chemistry · HydrocarbonsAccording to Markovnikov's rule, when HBr adds to an unsymmetrical alkene, the hydrogen atom attaches to the carbon:
- A with fewer hydrogen atoms already attached
- B with more hydrogen atoms already attached
- C at the end of the chain always
- D that is part of a ring only
Answer: B. with more hydrogen atoms already attached
Why: Markovnikov's rule: in HX addition to an unsymmetrical alkene, H adds to the carbon already bearing more hydrogen atoms, forming the more stable carbocation intermediate.
Question 10
Chemistry · States of MatterThe surface tension of a liquid generally:
- A does not depend on temperature
- B increases as the temperature rises
- C decreases as the temperature rises
- D is zero at room temperature
Answer: C. decreases as the temperature rises
Why: Increased thermal motion weakens intermolecular attractions, which lowers the surface tension.