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NEET UG practice questions

Physics, Chemistry and Biology practice with answers and explanations. 1,164 questions in the bank.

1. 1For the following reaction sequence, choose the correct option. [IMAGE]Chemistry· Re-NEET 2026· Moderate· figure
2. 2Given below are two statements: **Statement-I** : $[Fe(ox)_3]^{3-}$ is chiral. **Statement-II** : *trans* – $[Cr(H_2O)_2(ox)_2]^-$ is…Chemistry· Re-NEET 2026· Moderate· figure
3. 3The following carbocation is stabilized by the interaction of the empty $p$ orbital with [IMAGE]Chemistry· Re-NEET 2026· Moderate· figure
4. 4In potash alum, the ratio of K$^+$ and SO$_4^{2-}$ ions isChemistry· Re-NEET 2026· Moderate
5. 5The correct statement about peptides and proteins isChemistry· Re-NEET 2026· Moderate
6. 6The numbers 17.0145 and 21.0235 were rounded to three figures after the decimal point. The resulting numbers, respectively, areChemistry· Re-NEET 2026· Moderate
7. 7The correct order of solubility of the given salts in water at 298 K is [IMAGE]Chemistry· Re-NEET 2026· Moderate· figure
8. 8Among the following options, the correct trend in the electron gain enthalpy isChemistry· Re-NEET 2026· Moderate· figure
9. 9Assertion A: For an ideal solution formed by mixing liquids P and Q, $\Delta_{mix} H = 0$ and $\Delta_{mix} V = 0$ Reason R: No…Chemistry· Re-NEET 2026· Moderate
10. 10The amino acid that gives a red-blood colour on treating its sodium fusion extract with sodium nitroprusside isChemistry· Re-NEET 2026· Moderate· figure
11. 11The standard electrode potential ($E^{\circ}$) for the half-cell reaction $Fe^{3+} + e^- \to Fe^{2+}$ at 298 K is (Given :…Chemistry· Re-NEET 2026· Moderate· figure
12. 12In an acidic medium, 10 mL of 0.25 M oxalic acid is titrated with $KMnO_4$ solution. If the volume of $KMnO_4$ solution required to reach…Chemistry· Re-NEET 2026· Moderate
13. 13According to crystal field theory, the correct order of ligands with respect to their decreasing order of field strength isChemistry· Re-NEET 2026· Moderate
14. 14Two moles of an ideal gas undergo free expansion from 10 L to 100 L at 300 K. The values of $\Delta S_{system}$ and $\Delta…Chemistry· Re-NEET 2026· Moderate
15. 15$2A \xrightarrow{k} B$ is a zero-order reaction, where $k = 1.0$ mol L⁻¹ min⁻¹. If the initial concentration of A is 2 M, then the time…Chemistry· Re-NEET 2026· Moderate
16. 16Given below are two statements: One is labelled as **Assertion A** and the other is labelled as **Reason R**. **Assertion A:** Generally,…Chemistry· Re-NEET 2026· Moderate
17. 17For a salt **XY**, which is a strong electrolyte, the plot of $\Lambda_m$ versus $\sqrt{c}$ has a slope of –90.0 S cm² mol⁻³/² L¹/² at 298…Chemistry· Re-NEET 2026· Moderate
18. 18The amount of carbon dioxide evolved upon complete combustion of 116 g of n-butane is (Given: atomic mass in amu H = 1, C = 12 and O = 16)Chemistry· Re-NEET 2026· Moderate
19. 19For an elementary chemical reaction, the Arrhenius plot is given below. [IMAGE] If the energy of activation is 6.64 kJ mol⁻¹ and R = 8.3 J…Chemistry· Re-NEET 2026· Moderate· figure
20. 20Given below are two statements : **Statement-I** : Heating NaCl with concentrated H$_2$SO$_4$ and MnO$_2$ results in oxidation of Mn.…Chemistry· Re-NEET 2026· Moderate
21. 21Among the species given below, the spin-only magnetic moment is highest for (Given: Atomic number of Ti = 22, Mn = 25, Fe = 26 and Co = 27)Chemistry· Re-NEET 2026· Moderate· figure
22. 22The lanthanide ion having four unpaired electrons is (Given : Atomic numbers of Ce = 58, Nd = 60, Tb = 65 and Ho = 67)Chemistry· Re-NEET 2026· Moderate· figure
23. 23The formula of tetraammineaquachloridocobalt(III) chloride isChemistry· Re-NEET 2026· Moderate
24. 24Consider the reversible processes for 1.0 mol of an ideal gas as shown in the figure. [IMAGE] Processes 2 and 4 are adiabaticChemistry· Re-NEET 2026· Moderate· figure