NEET UG 2026 Daily Practice Set To Score 650+ (DAY 25)

NEET UG 2026 Daily Practice Set: Consistency is the real game-changer in NEET UG preparation, and daily practice is what separates top scorers from the rest. Welcome to Day 25 of our “Daily Practice Questions to Score 650+” series, designed to sharpen your concepts, improve accuracy, and build the speed needed for the actual exam. Today’s carefully selected MCQs from Physics, Chemistry, and Biology will help you identify weak areas, strengthen fundamentals, and move one step closer to your dream medical college.

PHYSICS

Q.1. A body is projected horizontally with speed u from the top of a tower of height h. Neglecting air resistance, which of the following graphs best represents the variation of its vertical velocity component $v_y$ with time t ?

A. A curve increasing and then decreasing with time

B. A horizontal straight line above time axis

C. A straight line with negative slope cutting vertical axis at u

D. A straight line through origin with positive slope

Q.2. Two resistors of resistances R and 2R are connected in parallel across a potential difference $V$. What is the ratio of power dissipated in R to that in $2R$?

A. 1:4

B. 4:1

C. 1:2

D. 2:1

Q.3. An object is placed between the principal focus $F$ and optical center $O$ of a thin convex lens. What is the nature of the image formed?

A. Real, inverted and diminished

B. Virtual, erect and diminished

C. Real, inverted and enlarged

D. Virtual, erect and enlarged

Q.4. A particle of mass m is constrained to move in a smooth vertical circular track of radius R. It is released from rest at a point making an angle ${60}^{\circ }$ with the lowest point. The minimum value of R so that the particle completes the vertical circle is

A. $R={\displaystyle \frac{5v_0^2}{4g}}$

B. $R={\displaystyle \frac{5g}{2}}$

C. $R={\displaystyle \frac{5R}{2}}$

D. $R={\displaystyle \frac{5g}{4}}$

Q.5. A parallel-plate capacitor with plate area $A$ and separation $d$ is filled completely with a dielectric of constant K. It is charged to potential V and then disconnected from the battery. The dielectric is now slowly withdrawn completely. The work done in this process is

A. ${\displaystyle \frac{1}{2}}C{V}^2$

B. $C{V}^2$

C. ${\displaystyle \frac{1}{2}}C{V}^2$

D. Zero

Read Also: NEET UG 2026 Daily Practice Questions To Score 650+ (DAY 24)

CHEMISTRY

Q.6. A first-order reaction has a rate constant $k$ at temperature $T$. If the temperature is increased by ${10}^{\circ }\text{C}$ and the rate of reaction doubles, the ratio of rate constants ${\displaystyle \frac{k_{T+20}}{k_T}}$ is approximately

A. 2

B. 5

C. 4

D. 3

Q.7. Which of the following complexes shows geometrical isomerism?

A. $[{\text{Fe(CN)}}_6{]}^{3-}$

B. $[{\text{Pt(NH}}_3{)}_4{]}^{2+}$

C. $[{\text{Pt(NH}}_3{)}_2{\text{Cl}}_2]$

D. $[{\text{Ni(CN)}}_4{]}^{2-}$

Q.8. Which of the following statements about aromaticity is correct?

A. Naphthalene is non-aromatic because it contains two fused rings

B. Benzene is aromatic because it has 6 $\pi$ electrons satisfying Hückel’s rule

C. Cyclooctatetraene is aromatic because it has 8 $\pi$ electrons

D. Cyclobutadiene is aromatic because it is cyclic and planar

Q.9. Which of the following pairs of compounds will form an ideal solution at all compositions according to Raoult’s law?

A. Ethanol and water

B. Acetone and chloroform

C. Nitric acid and water

D. Benzene and toluene

Q.10. A 1.0 $\text{M}$ solution of a weak acid $HA$ is 1% ionized. The ionization constant $K_a$ of the acid is approximately

A. $1\times {10}^{-2}$

B. $1\times {10}^{-1}$

C. $1\times {10}^{-4}$

D. $1\times {10}^{-3}$

BIOLOGY

Q.11. Which of the following structures is common to both mitochondria and chloroplasts?

A. Thylakoids

B. Double membrane envelope

C. Grana

D. Cristae

Q.12. During translation in prokaryotes, the Shine-Dalgarno sequence is important because it

A. Serves as the start codon for translation

B. Signals termination of translation

C. Aligns the ribosome with the start codon on mRNA

D. Binds to the 3′ end of tRNA

Q.13. In a food chain of a grassland ecosystem: Grass → Grasshopper → Frog → Snake → Hawk, the trophic level of the frog is

A. Primary consumer

B. Secondary consumer

C. Tertiary consumer

D. Producer

Read Also: Most Important Biology Diagram For NEET UG 2026 (Day 10)

Q.14. In a typical eukaryotic cell cycle, the checkpoint that ensures all chromosomes are properly attached to the spindle apparatus before anaphase is

A. M (spindle) checkpoint

B. S phase checkpoint

C. G$1$ checkpoint

D. G$2$ checkpoint

Q.15. n humans, ABO blood group is controlled by multiple alleles and shows codominance. A man with blood group $AB$ marries a woman with blood group $O$. What are the possible blood groups of their children?

A. A, B, and $AB$

B. Only $B$

C. A and $B$

D. Only $A$

Keep the momentum alive, because every single day of focused practice adds directly to your final NEET score. Review your mistakes, revise the related NCERT concepts, and track your progress to ensure steady improvement. Join us tomorrow for Day 26, where another fresh set of high-yield questions will continue guiding you toward the 650+ milestone and confident exam performance.

ANSWERS & EXPLANATIONS

Ans.1. D.  A straight line through origin with positive slope. Under uniform gravity, the vertical acceleration is constant and always in the same direction, so the vertical velocity changes at a constant rate. That leads to a linear graph $v_y=gt$, starting from zero and increasing steadily. 

Ans.2. D. 2:1. Because both resistors have the same potential difference V in parallel, the formula $P=V^2\mathrm{/}R$ shows that power decreases as resistance increases. Therefore, $P_1=V^2\mathrm{/}R$ for R and $P_2=V^2\mathrm{/}(2R)$ for $2R$, giving $P_1:P_2=2:1$. So the resistor with resistance R dissipates twice the power compared to the resistor with resistance 2R.

Ans.3. D. Virtual, erect and enlarged. For a convex lens with the object inside the focal length, refraction causes the rays to diverge as if they originated from a larger, upright image on the same side of the lens. This is the basis of visual magnification: the image appears bigger than the object, not smaller, so describing it as diminished is inconsistent with ray diagram analysis.

Ans.4. A. $R={\displaystyle \frac{5v_0^2}{4g}}$. This emerges from carefully combining the energy conservation principle with the centripetal force condition at the top of the circle. The speed at the top, required to maintain contact, is set by $mg={\displaystyle \frac{m{v}^2}{R}}$. Energy conservation between the release point and the top relates $v^2$ to the change in gravitational potential energy.

Ans.5. C. ${\displaystyle \frac{\mathrm{<br\; class="Apple-interchange-newline">1}}{2}}C{V}^2$, taking C as the initial capacitance with dielectric. This follows from computing initial and final energies based on the appropriate capacitances and using the fact that the capacitor is isolated, so charge remains fixed. 

Ans.6. C. 4. Because the rate doubles with each ${10}^{\circ }\text{C}$ increase, the rate constant for a first-order reaction does the same. Over a ${20}^{\circ }\text{C}$ increase, the rate constant doubles twice, giving $k_{T+20}\approx 4k_T$. This example demonstrates the cumulative effect of exponential temperature dependence: modest changes in temperature can produce large changes in rate, reflecting the strong sensitivity of molecular collision frequencies and activation energy barriers to thermal energy.

Ans.7. C. $[{\text{Pt(NH}}_3{)}_2{\text{Cl}}_2]$. As a square planar ${\text{MA}}_2{\text{B}}_2$ complex, it exhibits cis/trans isomerism, with different spatial arrangements of ${\text{NH}}_3$ and ${\text{Cl}}^{-}$ ligands around the central platinum ion.

Ans.8. B. Benzene is aromatic because it has 6 π electrons satisfying Hückel’s rule. Its planar, cyclic, fully conjugated structure and $4n+2$ π-electron count (with n=1) give it exceptional stability and classic aromatic behavior.

Ans.9. D. Benzene and toluene. Their similar molecular structures and intermolecular forces result in negligible enthalpy and volume changes upon mixing, making the solution nearly ideal and consistent with Raoult’s law over all compositions.

Ans.10. C. 1×10−4. For a 1.0 M solution with only 1% ionization, $K_a$ must be relatively small, and the calculation $K_a\approx c{\alpha }^2=1\times (0.01{)}^2=1\times {10}^{-4}$ gives a consistent estimate.

Ans.11. B. Double membrane envelope. Both mitochondria and chloroplasts possess an outer and inner membrane, creating a double-membrane-bound organelle, which supports the endosymbiotic theory of their evolutionary origin.

Ans.12. C. It aligns the ribosome with the start codon on mRNA. This function is crucial for precise initiation but is unrelated to termination signals.

Ans.13. B. Secondary consumer. Frogs occupy the trophic level above primary consumers and below tertiary consumers in this linear food chain, illustrating typical predator–prey relationships in a grassland ecosystem.

Ans.14. A. M (spindle) checkpoint. This checkpoint operates during metaphase of mitosis and ensures that all kinetochores are properly attached to spindle microtubules from opposite poles. Only when this condition is satisfied does the cell proceed to anaphase, allowing sister chromatids to separate safely. This mechanism prevents chromosome missegregation and aneuploidy.

Ans.15. C. A and $B$. Codominance of $I^A$ and $I^B$ in the father means both alleles are expressed in his phenotype (group $AB$), but the mother provides only i. Thus, each child receives either $I^A$ or $I^B$ from the father and $i$i from the mother, leading to phenotypes $A$ or $B$ but not $AB$ or $O$.

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