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 18 is the same paper for every student, so your rank is among everyone who sat it. Difficulty: 32% easy, 60% medium, 8% hard.
Sample questions from Mock 18 with answers
10 of the 180 questions, with answers and explanations. The rest are in the app.
Question 1
Biology · Reproductive HealthArtificial insemination (AI) involves:
- A tying the oviducts
- B injecting hormones only
- C removing the ovary
- D introducing the semen of the husband or a donor into the vagina or the uterus (IUI)
Answer: D. introducing the semen of the husband or a donor into the vagina or the uterus (IUI)
Why: It helps where the male cannot inseminate the female.
Question 2
Biology · Human ReproductionOvulation, the release of a mature ovum from the ovary, typically occurs around which day of a standard 28-day menstrual cycle?
- A day 1
- B day 14
- C day 21
- D day 28
Answer: B. day 14
Why: Ovulation typically occurs around day 14 of a standard 28-day menstrual cycle, roughly midway through the cycle, triggered by a surge in LH.
Question 3
Biology · Animal KingdomThe Echinoderms have an endoskeleton of:
- A chitin
- B calcareous ossicles, with the spiny skin
- C the bone
- D cartilage
Answer: B. calcareous ossicles, with the spiny skin
Why: The adults are radially symmetrical, whereas the larvae are bilaterally symmetrical.
Question 4
Biology · Microbes in Human WelfareStreptokinase, a 'clot buster' used in patients with a myocardial infarction, is produced by:
- A the bacterium Lactobacillus
- B the fungus Trichoderma
- C the bacterium Streptococcus
- D the fungus Monascus purpureus
Answer: C. the bacterium Streptococcus
Why: It dissolves clots in blood vessels.
Question 5
Biology · Excretory Products and Their EliminationThe vasa recta is absent or reduced in:
- A none
- B all the nephrons
- C the juxtamedullary nephrons
- D the cortical nephrons
Answer: D. the cortical nephrons
Why: The vasa recta is well developed in the juxtamedullary nephrons.
Question 6
Physics · Electromagnetic InductionTwo coils have self-inductances of 4 H and 9 H, with perfect coupling. Their mutual inductance is:
- A 36 H
- B 13 H
- C 2.25 H
- D 6 H
Answer: D. 6 H
Why: M = k√(L₁L₂) = √36 = 6 H for k = 1.
Question 7
Physics · Work, Energy and PowerThe potential energy of a particle at a stable equilibrium position is:
- A a maximum
- B a minimum
- C constant along the path
- D zero always
Answer: B. a minimum
Why: The force F = −dU/dx is zero there, and any small displacement raises the energy.
Question 8
Chemistry · Structure of AtomThe maximum number of electrons that can be accommodated in the M shell (n=3) is:
- A 8
- B 18
- C 32
- D 2
Answer: B. 18
Why: The maximum number of electrons in a shell is given by 2n²; for n=3 (M shell), this is 2×9 = 18.
Question 9
Chemistry · Alcohols, Phenols and EthersAlcohols can be prepared from alkenes by acid-catalyzed hydration, which follows:
- A Markovnikov's rule
- B anti-Markovnikov's rule
- C Zaitsev's rule only
- D no particular regiochemical rule
Answer: A. Markovnikov's rule
Why: Acid-catalyzed hydration of alkenes proceeds via a carbocation intermediate, following Markovnikov's rule — the -OH group ends up on the more substituted carbon.
Question 10
Chemistry · Some Basic Concepts of ChemistryThe molality of a solution containing 18 g of glucose (molar mass 180 g/mol) dissolved in 500 g of water is:
- A 0.2 m
- B 0.1 m
- C 2 m
- D 0.036 m
Answer: A. 0.2 m
Why: 0.1 mol/0.5 kg.