NEET 2019 (question paper code R3) had 180 questions in NEET720's bank: Physics 45, Chemistry 45, Botany 45 and Zoology 45. The 12 questions below are a fixed free sample with NEET720's explanations; the complete paper is in the app, where it can be sat as a timed mock with the real marking scheme.
Physics — NEET 2019 sample questions
NEET 2019 · Question 1
A particle executes SHM according to y=A₀+A sinωt+B cosωt. What is the amplitude of oscillation?
- A.A+B
- B.A−B
- C.√(A²+B²)
- D.A₀+√(A²+B²)
Show answer and explanation
Answer: C. √(A²+B²)
The constant A₀ only shifts the mean position.
The constant A₀ only shifts the mean position. Combining A sinωt+B cosωt into a single sinusoid gives amplitude √(A²+B²). This leads to the answer “√(A²+B²)”.
NEET 2019 · Question 2
Eddy currents are useful in all of the following except:
- A.Electric heater
- B.Electromagnetic braking
- C.Induction furnace
- D.Damping in galvanometers
Show answer and explanation
Answer: A. Electric heater
Eddy currents are deliberately used for induction heating, magnetic braking and electromagnetic damping.
Eddy currents are deliberately used for induction heating, magnetic braking and electromagnetic damping. An ordinary resistance electric heater does not rely on eddy currents. NTA accepted both option 1 and option 4 for this item; the JSON stores option 1 because the schema permits one index. Because the requested schema supports only one correctIndex, the first accepted answer is stored.
NEET 2019 · Question 3
What is the average velocity of a particle over one complete cycle of simple harmonic motion?
- A.Zero
- B.Aω
- C.Aω/2
- D.2Aω
Show answer and explanation
Answer: A. Zero
After one complete period the particle returns to its starting position, so total displacement is zero.
After one complete period the particle returns to its starting position, so total displacement is zero. Average velocity equals displacement divided by elapsed time and is therefore zero. This leads to the answer “Zero”.
Chemistry — NEET 2019 sample questions
NEET 2019 · Question 46
For the redox reaction 2Fe³⁺+2I⁻→2Fe²⁺+I₂, which species is oxidised?
- A.Fe³⁺
- B.I⁻
- C.Fe²⁺
- D.I₂
Show answer and explanation
Answer: B. I⁻
Iodide changes oxidation state from -1 to 0 in I₂ and therefore loses electrons.
Iodide changes oxidation state from -1 to 0 in I₂ and therefore loses electrons. It is oxidised, while Fe³⁺ is reduced to Fe²⁺. This leads to the answer “I⁻”.
NEET 2019 · Question 47
Which quantum number determines the shape of an atomic orbital?
- A.Azimuthal quantum number l
- B.Principal quantum number n
- C.Magnetic quantum number m
- D.Spin quantum number s
Show answer and explanation
Answer: A. Azimuthal quantum number l
The azimuthal quantum number l identifies the subshell and orbital shape: s, p, d, f.
The azimuthal quantum number l identifies the subshell and orbital shape: s, p, d, f. n mainly determines shell/size and m orientation. This leads to the answer “Azimuthal quantum number l”.
NEET 2019 · Question 48
Which of the following has the highest bond order?
- A.O₂
- B.N₂
- C.F₂
- D.O₂⁻
Show answer and explanation
Answer: B. N₂
N₂ has a triple bond and molecular-orbital bond order 3.
N₂ has a triple bond and molecular-orbital bond order 3. O₂ has 2, O₂⁻ has 1.5 and F₂ has 1. This leads to the answer “N₂”.
Botany — NEET 2019 sample questions
NEET 2019 · Question 91
Grass leaves curl inward during dry weather because of:
- A.Turgidity of guard cells
- B.Turgidity of bulliform cells
- C.Flaccidity of bulliform cells
- D.Flaccidity of epidermal cells only
Show answer and explanation
Answer: C. Flaccidity of bulliform cells
Bulliform cells on monocot leaves lose water and become flaccid during water stress.
Bulliform cells on monocot leaves lose water and become flaccid during water stress. This causes the leaf to roll/curl, reducing exposed surface and transpiration. This leads to the answer “Flaccidity of bulliform cells”.
NEET 2019 · Question 92
The inactive Bt protoxin ingested by a bollworm becomes active because of:
- A.Acidic pH of stomach
- B.Host proteases only at neutral pH
- C.Low temperature
- D.Alkaline pH of the insect gut
Show answer and explanation
Answer: D. Alkaline pH of the insect gut
Bt Cry protein is produced as an inactive protoxin.
Bt Cry protein is produced as an inactive protoxin. The alkaline insect midgut solubilises/activates it, after which it damages epithelial cells. This leads to the answer “Alkaline pH of the insect gut”.
NEET 2019 · Question 94
Which plant hormone is associated strongly with stomatal closure during water stress?
- A.Auxin
- B.Gibberellin
- C.Cytokinin
- D.Abscisic acid
Show answer and explanation
Answer: D. Abscisic acid
Water stress raises ABA levels.
Water stress raises ABA levels. ABA promotes guard-cell ion loss and stomatal closure, reducing transpirational water loss. This leads to the answer “Abscisic acid”.
Zoology — NEET 2019 sample questions
NEET 2019 · Question 93
Which statement about xylem is correct?
- A.It transports only sugars
- B.Its vessels are living at maturity
- C.It conducts water/minerals mainly upward
- D.It is absent in vascular plants
Show answer and explanation
Answer: C. It conducts water/minerals mainly upward
Xylem is the principal vascular tissue for transport of water and mineral salts from roots to aerial parts.
Xylem is the principal vascular tissue for transport of water and mineral salts from roots to aerial parts. Most conducting elements are dead at maturity. This leads to the answer “It conducts water/minerals mainly upward”.
NEET 2019 · Question 96
Which contraceptive methods involve hormonal regulation? A. lactational amenorrhoea, B. oral pills, C. emergency contraceptive pills, D. condoms.
- A.A and D
- B.A, B and C
- C.B and D
- D.D only
Show answer and explanation
Answer: B. A, B and C
Lactational amenorrhoea depends on hormonal suppression of ovulation, while oral and emergency pills use hormones/hormone-like compounds.
Lactational amenorrhoea depends on hormonal suppression of ovulation, while oral and emergency pills use hormones/hormone-like compounds. Condoms are physical barriers. This leads to the answer “A, B and C”.
NEET 2019 · Question 100
Which combination includes animals with organ-system level organisation, bilateral symmetry, true coelom and segmentation?
- A.Porifera, Cnidaria, Platyhelminthes
- B.Annelida, Arthropoda and Chordata
- C.Ctenophora, Mollusca and Porifera
- D.Platyhelminthes, Aschelminthes and Cnidaria
Show answer and explanation
Answer: B. Annelida, Arthropoda and Chordata
Annelids, arthropods and chordates are bilaterally symmetrical, coelomate animals with organ-system organisation; annelids and arthropods are clearly segmented and chordates show segmentation in major structures.
Annelids, arthropods and chordates are bilaterally symmetrical, coelomate animals with organ-system organisation; annelids and arthropods are clearly segmented and chordates show segmentation in major structures. This leads to the answer “Annelida, Arthropoda and Chordata”. The other choices describe a different biological structure or process.
Sit the full NEET 2019 paper as a timed mock
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Questions about NEET 2019
How many questions were there in NEET 2019?＋
The NEET 2019 paper in NEET720's bank (code R3) has 180 questions: Physics 45, Chemistry 45, Botany 45 and Zoology 45.
Where can I solve the full NEET 2019 paper?＋
Sign in to NEET720, open Previous Year Questions and choose 2019. You can practise question by question with instant explanations, or sit the whole paper as a timed mock with the real +4/−1 marking and a full analysis afterwards.
Are these the official NEET 2019 questions?＋
The questions and options reproduce the official NTA paper as published. Every explanation is NEET720's own; none is copied from any publisher or coaching institute. Questions that NTA declared bonus or withdrew are not shown as practice items.
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Questions and options reproduce the official NTA NEET 2019 paper. Explanations are written by NEET720. NEET720 is not affiliated with the National Testing Agency.