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 19 is the same paper for every student, so your rank is among everyone who sat it. Difficulty: 36% easy, 58% medium, 6% hard.
Sample questions from Mock 19 with answers
10 of the 180 questions, with answers and explanations. The rest are in the app.
Question 1
Biology · Biological ClassificationKingdom Protista includes organisms that are:
- A exclusively multicellular and photosynthetic
- B unicellular eukaryotes with diverse modes of nutrition
- C exclusively prokaryotic
- D exclusively parasitic
Answer: B. unicellular eukaryotes with diverse modes of nutrition
Why: Kingdom Protista is a diverse group of unicellular eukaryotic organisms with varied modes of nutrition (photosynthetic, heterotrophic, or both), acting as a boundary kingdom.
Question 2
Biology · Plant KingdomThe zygote in the bryophytes develops into a:
- A gametophyte
- B a protonema
- C sporophyte, which is differentiated into a foot, a seta and a capsule
- D the gemma
Answer: C. sporophyte, which is differentiated into a foot, a seta and a capsule
Why: The spores are produced in the capsule after meiosis.
Question 3
Biology · Structural Organisation in AnimalsTight junctions in epithelial tissue:
- A prevent leakage of substances across the tissue
- B make the cells contract
- C allow rapid exchange of ions between cells
- D hold cells in a sheet like a rivet
Answer: A. prevent leakage of substances across the tissue
Why: Gap junctions allow communication between neighbouring cells, and adhering junctions give mechanical attachment.
Question 4
Biology · Reproductive HealthThe use of amniocentesis for sex determination of the foetus is banned because it:
- A is very costly
- B may lead to female foeticide, and to a decline in the sex ratio
- C can harm the mother
- D is not accurate
Answer: B. may lead to female foeticide, and to a decline in the sex ratio
Why: A statutory ban was enforced in 2000.
Question 5
Biology · Anatomy of Flowering PlantsThe vascular bundles in the roots are:
- A scattered
- B collateral and open
- C radial, with the xylem and phloem on the different radii
- D conjoint
Answer: C. radial, with the xylem and phloem on the different radii
Why: There are usually 2–6 xylem bundles in the dicot roots (diarch to hexarch).
Question 6
Physics · Alternating CurrentThe period of the mains AC of frequency 50 Hz is:
- A 0.05 s
- B 0.5 s
- C 0.2 s
- D 0.02 s
Answer: D. 0.02 s
Why: T = 1/f = 1/50 = 0.02 s.
Question 7
Physics · Ray Optics and Optical InstrumentsStars appear to twinkle because of:
- A the actual change in the star's brightness
- B reflection from the Moon
- C absorption by the ozone layer
- D the changing refraction of starlight in the Earth's atmosphere
Answer: D. the changing refraction of starlight in the Earth's atmosphere
Why: The atmosphere's refractive index fluctuates, so the apparent position and brightness vary slightly.
Question 8
Chemistry · Environmental ChemistryDepletion of stratospheric ozone is caused mainly by:
- A carbon dioxide
- B chlorofluorocarbons releasing chlorine free radicals
- C sulphur dioxide
- D methane
Answer: B. chlorofluorocarbons releasing chlorine free radicals
Why: UV light splits CFCs to give chlorine radicals, each of which destroys many ozone molecules in a catalytic chain before being removed.
Question 9
Chemistry · Chemical BondingThe formal charge on the nitrogen atom in NH₄⁺ is:
- A −1
- B +3
- C +1
- D 0
Answer: C. +1
Why: Formal charge = 5 − 0 − (1/2)(8) = +1.
Question 10
Chemistry · p-Block ElementsOzone (O₃) is:
- A a reducing agent only
- B a bent molecule, and a strong oxidising agent
- C a linear molecule
- D a molecule of three double bonds
Answer: B. a bent molecule, and a strong oxidising agent
Why: It oxidises KI to iodine and is a diamagnetic allotrope of oxygen.