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NEET UG practice questions

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

1. 1The ratio of the wavelengths of the light absorbed by a Hydrogen atom when it undergoes n = 2 → n = 3 and n = 4 → n = 6 transitions,…Chemistry· NEET 2025· Moderate
2. 2Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling…Chemistry· NEET 2025· Moderate
3. 3Match List I with List II | | List-I (Ion) | | List-II (Group Number in Cation Analysis) | |---|---|---|---| | A. | $Co^{2+}$ | I. |…Chemistry· NEET 2025· Moderate
4. 4Predict the major product ‘P’ in the following sequence of reactions- [IMAGE]Chemistry· NEET 2025· Moderate· figure
5. 5Energy and radius of first Bohr orbit of He$^{+}$ and Li$^{2+}$ are [Given $R_H = 2.18 \times 10^{-18}$ J, a$_0 = 52.9$ pm]Chemistry· NEET 2025· Moderate
6. 6Which of the following are paramagnetic? A. $[\text{NiCl}_4]^{2-}$ B. $\text{Ni(CO)}_4$ C. $[\text{Ni(CN)}_4]^{2-}$ D.…Chemistry· NEET 2025· Moderate
7. 7Given below are two statements : **Statement I** : Like nitrogen that can form ammonia, arsenic can form arsine. **Statement II** :…Chemistry· NEET 2025· Moderate
8. 8Which among the following electronic configurations belong to main group elements? A. [Ne]3s¹ B. [Ar]3d³4s² C. [Kr]4d¹⁰ 5s²5p⁵ D.…Chemistry· NEET 2025· Moderate
9. 9Dalton's Atomic theory could not explain which of the following?Chemistry· NEET 2025· Moderate
10. 10Consider the following compounds : KO$_{2}$, H$_{2}$O$_{2}$ and H$_{2}$SO$_{4}$ The oxidation state of the underlined elements (K in…Chemistry· NEET 2025· Moderate· figure
11. 11If the half-life (t$_{1/2}$) for a first order reaction is 1 minute, then the time required for 99.9% completion of the reaction is closest…Chemistry· NEET 2025· Moderate
12. 12The correct order of the wavelength of light absorbed by the following complexes is, A. $[\text{Co}(\text{NH}_3)_6]^{3+}$ B.…Chemistry· NEET 2025· Moderate
13. 13Which one of the following compounds can exist as cis-trans isomers?Chemistry· NEET 2025· Moderate· figure
14. 14Phosphoric acid ionizes in three steps with their ionization constant values $K_{a_1}$ , $K_{a_2}$ and $K_{a_3}$ , respectively, while K is…Chemistry· NEET 2025· Moderate
15. 15Which one of the following reactions does **NOT** give benzene as the product?Chemistry· NEET 2025· Moderate· figure