Daily Practice Questions For NEET UG 2026 to score 650+ (DAY 20)

Daily Practice Questions For NEET UG 2026: Welcome to Day 20 of Daily Practice MCQs for NEET UG 2026, where consistency meets smart preparation. By solving a focused set of concept-based questions every day, you strengthen accuracy, speed, and confidence, three pillars of a 650+ score. Today’s MCQs are carefully designed from high-weightage NCERT topics in Physics, Chemistry, and Biology to help you revise key ideas, identify weak areas, and build strong exam temperament step by step.

PHYSICS

Q.1. A body is thrown vertically upward with an initial speed of $u$. It reaches a maximum height $h$. If the same body is thrown with speed $2u$, neglecting air resistance, what will be the new maximum height reached?

A. 4h

B. h/2

C. 3h

D. 2h

Q.2. For a concave mirror, an object is placed beyond the center of curvature. What is the nature and position of the image formed?

A. Virtual, erect, and diminished, formed between pole and focus

B. Real, inverted, and magnified, formed between focus and center of curvature

C. Real, inverted, and diminished, formed between focus and center of curvature

D. Virtual, erect, and magnified, formed behind the mirror

Q.3. A projectile is fired at an angle θ with the horizontal and has a range R on level ground. What will be the range if the same projectile is fired with the same speed at an angle ${90}^{\circ }-\theta$?

A. R

B. Rcosθ

C. 2R

D. R/2

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Q.4. In electrostatics, two point charges +Q and −Q are separated by a small distance 2a. At a point far away such that r ≫ a, what does the electric field resemble?

A. That of an electric dipole with moment p=Q×2a

B. That of a single point charge +Q located at the origin

C. Zero electric field everywhere

D. That of a single point charge −Q located at the origin

Q.5. Which of the following graphs best represents the variation of current I with potential difference V for an ohmic conductor at constant temperature?

A. A curve decreasing as V increases

B. A horizontal line parallel to the V-axis

C. A straight line passing through the origin

D. A straight line not passing through the origin

CHEMISTRY

Q.6. Which of the following pairs of solutions will form a buffer solution when mixed in appropriate proportions?

A. Weak acid and its conjugate base (e.g., CH${}_3$COOH and CH${}_3$COONa)

B. Weak base and strong acid in stoichiometric amounts so that no weak base remains

C. Strong acid and its conjugate base

D. Strong acid and strong base (e.g., HCl and NaOH)

Q.7. Which of the following is an example of a displacement reaction in chemistry?

A. $Zn+CuS{O}_4\to ZnS{O}_4+Cu$

B. $H_2+C{l}_2\to 2HCl$

C. $CaC{O}_3\to CaO+C{O}_2$

D. $NaCl+AgN{O}_3\to AgCl+NaN{O}_3$

Q.8. Which of the following sets of quantum numbers $(n,l,m_l,m_s)$ is not allowed for an electron in an atom?

A. (3,2,+3,+1/2)

B. (2,1,0,+1/2)

C. (3,0,0,-1/2)

D. (4,3,-2,-1/2)

Q.9. Which of the following changes will increase the rate of a chemical reaction according to collision theory?

A. Adding an inert gas at constant volume to a gas-phase reaction

B. Decreasing the temperature while keeping everything else constant

C. Decreasing the concentration of reactants in solution

D. Increasing the surface area of a solid reactant

Q.10. Which statement best explains why water has a high boiling point compared to other hydrides in group 16, such as $H_{2}S$?

A. Water molecules are larger than $H_{2}S$ molecules

B. Water forms strong hydrogen bonds between its molecules

C. Water has a higher molar mass than $H_{2}S$

D. Water has stronger London dispersion forces than $H_{2}S$

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BIOLOGY

Q.11. In human respiration, which change directly triggers the respiratory center in the medulla oblongata to increase the rate of breathing under normal conditions?

A. Increase in blood $O_2$ concentration

B. Decrease in blood $O_2$ concentration

C. Increase in blood $C{O}_2$ concentration and $H^{+}$ ions

D. Decrease in blood temperature

Q.12. Which of the following best defines Mendel’s law of independent assortment?

A. Genes for different traits are inherited together because they are on the same chromosome

B. Genes for different traits separate independently during gamete formation if they are on different chromosomes

C. Alleles of a gene separate during gamete formation so that each gamete receives only one allele

D. Dominant alleles always mask recessive alleles in the phenotype

Q.13. A plant hormone promotes cell elongation in stems, breaks seed dormancy, and induces flowering in some plants. Which hormone is this most likely to be?

A. Auxin

B. Abscisic acid

C.. Cytokinin

D. Gibberellin

Q.14. Which of the following best describes linkage in genetics?

A. The phenomenon where one gene affects multiple traits

B. The tendency of genes located close together on the same chromosome to be inherited together

C. The expression of both alleles of a gene in a heterozygote

D. The sudden appearance of a new trait due to change in DNA sequence

Q.15. Which of the following statements about the nephron in the human kidney is correct?

A. Most reabsorption of water occurs in the distal convoluted tubule

B. Glomerular filtration is an active process requiring ATP

C. The loop of Henle is primarily responsible for creating a concentration gradient in the medulla

D. Bowman’s capsule is the main site of tubular secretion

And that’s a wrap for Day 20, future doctor! If some questions felt tricky, don’t worry- that’s just to test your patience and consistency. Review the mistakes, revise NCERT like a pro, and come back stronger for Day 21. Stay consistent, stay curious, and keep the dream alive, because with daily practice and a positive vibe, that white coat in NEET UG 2026 is closer than you think.

Read Also: NEET UG 2026 Registration Begins: Check Dates & Instructions

ANSWERS AND EXPLANATIONS

Ans.1. A. The maximum height is given by $h={\displaystyle \frac{u^2}{2g}}$ . When the initial speed becomes 2u, the new height is $h^{\mathrm{\prime }}={\displaystyle \frac{(2u{)}^2}{2g}}=4h$. 

Ans.2. B. real, inverted, and magnified, formed between focus and center of curvature. In standard ray diagrams, when the object lies beyond the center of curvature, the image forms between center and focus, is real and inverted, and generally smaller.

Ans.3. A. $\mathrm{<br\; class="Apple-interchange-newline">R}$R. Since range is $R={\displaystyle \frac{u^2\sin (2\theta )}{g}}$ and $\sin (2\theta )$ is the same for θ and 90∘−θ, the range remains the same when using complementary angles. 

Ans.4. A. that of an electric dipole with moment p=Q×2a. Even though the net charge is zero, the separation of positive and negative charges creates a dipole, and this dipole produces a non-zero electric field that can be approximated by dipole formulas at large distances.

Ans.5. C. a straight line passing through the origin. The proportionality I∝V means that when voltage is zero, current must also be zero, so the line must start at the origin. The slope of the line reflects the conductance 1/R, with steeper slopes indicating lower resistance.

Ans.6. A. weak acid and its conjugate base (e.g., CH${}_3$COOH and CH${}_3$COONa). In such a mixture, the weak acid provides $H^{+}$ when base is added, and the conjugate base captures $H^{+}$ when acid is added, allowing the solution to resist pH changes over a certain range. This principle underlies many biological and industrial buffering systems.

Ans.7. A. $Zn+CuS{O}_4\to ZnS{O}_4+Cu$ In displacement reactions, a more reactive element replaces a less reactive element from its compound, typically seen with metals and their salt solutions or halogens and halide salts.

Ans.8. A. (3,2,+3,+1/2) because $m_l$ must satisfy −l≤ml≤+l. For l=2, $m_l$ can only be −2,−1,0,+1,+2, so +3 is not permitted. This rule arises from the quantization of angular momentum in atomic orbitals.

Ans.9. D. increasing the surface area of a solid reactant. Collision theory states that the rate of a reaction depends on the frequency of effective collisions, which are collisions with proper orientation and sufficient energy.

Ans.10. B. Water forms strong hydrogen bonds between its molecules. Hydrogen bonding provides an additional, strong type of intermolecular force on top of ordinary dipole-dipole and dispersion forces. Because each water molecule can participate in multiple hydrogen bonds, the liquid structure is highly cohesive. 

Ans.11. C. Increase in blood $C{O}_2$ concentration and $H^{+}$ ions. When $C{O}_2$ levels rise in the blood, $C{O}_2$ diffuses into the cerebrospinal fluid and forms carbonic acid, which dissociates into $H^{+}$ and $HC{O}_3^{-}$. The increased $H^{+}$ concentration lowers pH and stimulates the chemo sensitive area near the medulla oblongata.

Ans.12. B.  Genes for different traits separate independently during gamete formation if they are on different chromosomes. Mendel’s law of independent assortment states that alleles of different genes assort independently of one another during gamete formation, provided the genes are located on different chromosomes or are far apart on the same chromosome. 

Ans.13. D. Gibberellins are plant hormones that promote stem elongation by stimulating both cell division and cell elongation. They also play a key role in breaking seed dormancy, particularly in cereals, by stimulating the synthesis of hydrolytic enzymes that mobilize stored food during germination.

Ans.14. C. The tendency of genes located close together on the same chromosome to be inherited together. Linkage deals with how existing genes are transmitted from parents to offspring depending on their positions on chromosomes, and it modifies the expected Mendelian ratios when genes are close enough that crossing over between them is infrequent.

Ans.15. C.  The loop of Henle is primarily responsible for creating a concentration gradient in the medulla. This gradient underlies the kidney’s ability to produce urine more concentrated than blood plasma, which is essential for water conservation in terrestrial animals.

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