NEET 2025 question paper

Consider a water tank with one wall at x = L; it can be taken to be very wide in the z direction. When filled with a liquid of surface tension S and density ρ, the liquid surface curves upward and makes angle θ₀ (θ₀ ≪ 1) with the x-axis at x = L. If y(x) is the height of the surface, then the equation for y(x) is: (take θ(x) = sin θ(x) = tan θ(x) = dy/dx; g is the acceleration due to gravity)

Three identical heat conducting rods are connected in series. The rods on the sides have thermal conductivity 2K while that in the middle has thermal conductivity K. The left end of the combination is maintained at temperature 3T and the right end at T. The rods are thermally insulated from outside. In steady state, temperature at the left junction is T₁ and that at the right junction is T₂. The ratio T₁/T₂ is:

A constant voltage of 50 V is maintained between the points A and B of a circuit. Between A and B there are two paths: the upper path A–(1 Ω)–C–(2 Ω)–B and the lower path A–(3 Ω)–D–(4 Ω)–B. Points C and D are joined directly by a wire (branch CD). The current through the branch CD of the circuit is:

Which among the following electronic configurations belong to main group elements? A. [Ne]3s¹ B. [Ar]3d³4s² C. [Kr]4d¹⁰5s²5p⁵ D. [Ar]3d¹⁰4s¹ E. [Rn]5f⁰6d²7s² Choose the correct answer from the option given below:

Given below are two statements: Statement I: Ferromagnetism is considered as an extreme form of paramagnetism. Statement II: The number of unpaired electrons in a Cr²⁺ ion (Z = 24) is the same as that of a Nd³⁺ ion (Z = 60). In the light of the above statements, choose the correct answer from the options given below:

Higher yield of NO in N₂(g) + O₂(g) ⇌ 2NO(g) can be obtained at [ΔH of the reaction = +180.7 kJ mol⁻¹] A. Higher temperature B. Lower temperature C. Higher concentration of N₂ D. Higher concentration of O₂ Choose the correct answer from the options given below:

Streptokinase produced by bacterium Streptococcus is used for:

Match List I with List II. List-I: A. Chlorophyll a B. Chlorophyll b C. Xanthophylls D. Carotenoids List-II: I. Yellow-green II. Yellow III. Blue-green IV. Yellow to yellow-orange Choose the correct answer from the options given below:

Match List I with List II. List-I: A. Scutellum B. Non-albuminous seed C. Epiblast D. Perisperm List-II: I. Persistent nucellus II. Cotyledon of monocot seed III. Groundnut IV. Rudimentary cotyledon Choose the correct answer from the options given below:

Which one of the following is the characteristic feature of gymnosperms?