Mock Part 2

Which of the following is not the application of gel filtration? (PPSC 2021)(a) Purification(b) Relative molecular mass determination(c) Protein concentration(d) None of theseAnswer: (d) Which solvent is usually used for SEC…

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Mock Part 1

Which of the following elements is the most electropositive??(a) B(b) C(c) Cl(d) NAnswer: (a)Explanation“Electropositivity can be defined as the tendency of an atom to donate electrons and form positively charged cations.”…

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Quantum Chemistry

Quantum Chemistry Total number of nodes for 3d orbital is __(a) 3(b) 2(c) 1(d) 0Answer: (b)ExplanationTotal number of nodes include angular and radial nodes. Angular nodes and radial nodes are given…

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Quiz Physics 1 Part 2

According to second condition of equilibrium, for a system to be in rotational equilibrium, the torques acting on it must balance. This is true only if the torques are taken about:the…

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Quiz Physics 1 Part 1

[PPSC 2017] Work done to stop the motion of car is equivalent to:Thermal EnergyK.E.P.E.None of theseAnswer K.E [PPSC 2017] Work done in circular motion after complete cycle? Radius is 5m with…

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S and p

1.The correct increasing order of splitting power of ligands according to spectrochemical series is(a) Cl– < OH– < CN–(b) Cl– < CN– < OH–(c) OH– < Cl– < CN–(d) none of…

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States of matter

When 1 litre of water is cooled from 4°C to 0°C, its volume _.?(a) First decreases and then increases(b) Remains the same(c) Increases(d) DecreasesAnswer: (c)ExplanationWhen 1 litre of water is cooled…

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Chemical bonding

1.Find the pair with sp2 hybridization of the central molecule (a) NH3 and NO2– (b) BF3 and NH2– (c) BF3 and NO2– (d) none of these Explanation To find the hybridization of central atoms: For…

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Chromatography

1. Chromatography is a physical method that is used to separate and analyse __________a) Simple mixturesb) Complex mixturesc) Viscous mixturesd)none of these Answer: b Explanation Chromatography is a physical method that…

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