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Chemistry (NEET 2024)Question 1
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Biology (NEET 2023)NEET 2023 / Cell Biology & MeiosisWhich of the following stages of meiosis involves the division of centromere?Telophase IIAnaphase IIMetaphase IAnaphase IDuring Anaphase II of Meiosis, the centromere divides and sister chromatids separate toward opposite poles. Centromere does NOT split in Anaphase I.
Physics (NEET 2022)NEET 2022 / Electrostatics & TorqueAn electric dipole is placed at an angle of 30° with an electric field of intensity 2 × 10⁵ N/C. It experiences a torque equal to 4 N·m. If dipole length is 2 cm, find the charge on dipole:8 mC2 mC5 mC7 mCTorque τ = p E sin(θ) = (q · 2a) · E · sin(30°). Substituting values gives 4 = q · (0.02) · (2 × 10⁵) · 0.5, leading directly to q = 2 mC.
Chemistry (NEET 2024)NEET 2024 / Coordination CompoundsWhich of the following complex ions has the highest magnetic moment (spin-only value)?[Fe(CN)₆]³⁻[CoF₆]³⁻[Fe(H₂O)₆]²⁺[Ni(CO)₄][CoF₆]³⁻ has Co³⁺ with d⁶ configuration. Fluoride is a weak field ligand, resulting in 4 unpaired electrons (spin-only moment = √24 ≈ 4.90 BM).
Biology (NEET 2021)NEET 2021 / Molecular Basis of InheritanceIf the distance between two consecutive base pairs is 0.34 nm and total base pairs in double helix DNA is 6.6 × 10⁹ bp, what is total DNA length?2.2 meters1.1 meters2.5 meters3.4 metersTotal Length = 6.6 × 10⁹ × 0.34 × 10⁻⁹ m = 2.244 meters ≈ 2.2 meters (human diploid genome standard length).
Physics (AIPMT 2015)AIPMT 2015 / Photoelectric EffectWhen radiation of intensity I falls on a metal surface, photoelectrons count is N and max kinetic energy is T. If intensity is doubled to 2I, then:N is halved and T is doubledN is doubled and T remains unchangedBoth N and T are doubledN remains unchanged and T is doubledPhotoelectric current (electron count N) is directly proportional to intensity, while maximum kinetic energy T depends solely on radiation frequency.
Chemistry (AIPMT 2012)AIPMT 2012 / ThermodynamicsIn which of the following reactions is the standard entropy change positive (ΔS° > 0)?2H₂(g) + O₂(g) → 2H₂O(l)N₂(g) + 3H₂(g) → 2NH₃(g)CaCO₃(s) → CaO(s) + CO₂(g)C(graphite) + O₂(g) → CO₂(g)Thermal decomposition of solid CaCO₃ produces gaseous CO₂ alongside solid CaO, introducing significant molecular randomness (ΔS° > 0).
Biology (NEET 2020)NEET 2020 / Human RespirationIdentify the incorrect statement with reference to the transport of oxygen in humans:Partial pressure of CO₂ can interfere with O₂ binding with haemoglobinHigher H⁺ concentration in alveoli favours formation of oxyhaemoglobinLow pCO₂ in alveoli favours formation of oxyhaemoglobinBinding of oxygen with haemoglobin is mainly related to partial pressure of O₂In the alveoli, LOW H⁺ concentration (alkaline pH), low pCO₂, lower temperature and high pO₂ favour oxyhaemoglobin formation. Higher H⁺ promotes dissociation.
Physics (AIPMT 1998)AIPMT 1998 / GravitationThe escape velocity of a body from Earth's surface is 11.2 km/s. If Earth's mass doubles and radius halves, what will the new escape velocity be?11.2 km/s22.4 km/s5.6 km/s44.8 km/sEscape velocity formula is √(2GM/R). When M becomes 2M and R becomes R/2, escape velocity scales by √(4) = 2, yielding 2 × 11.2 km/s = 22.4 km/s.
Chemistry (AIPMT 1994)AIPMT 1994 / EquilibriumFor the reversible reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + Heat, the production of ammonia is maximized by:High temperature and high pressureLow temperature and low pressureLow temperature and high pressureHigh temperature and low pressureBy Le Chatelier principle, an exothermic reaction with a decrease in gas moles is promoted by low temperature and high pressure.
Biology (AIPMT 1991)AIPMT 1991 / Plant PhysiologyWater potential of pure water at standard temperature and atmospheric pressure is defined as:Zero100 barsLess than zeroMore than zero but less than oneBy international thermodynamic convention, the water potential of pure water at standard temperature and normal atmospheric pressure is defined as zero.
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NEET 2024 / Coordination Compounds
Which of the following complex ions has the highest magnetic moment (spin-only value)?
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