Which of the following molecules does not have a dipole moment? (PPSC 2015)?(a) CCl4(b) CH2Cl2(c) CHCl3(d) CH3ClAnswer: aVideo Explanation Which of the following compounds has an ionic bond?(a) H2O(b) NH4Cl(c) CH3Li(d)…
Which of the following element act as an inert electrode a) Cu b) Agc) Ptd) None Answer: C Explanation usually platinum works as inert electrode. Inert electrode means the electrode which doesn't participate…
The maximum number of electrons which can be present in a subshell can be represented by(a) 2l + 1(b) 2n2(c) 4l + 2(d) 4l – 2Answer: (c)ExplanationMaximum number of electrons present…
Select the correct statement from the following option.(a) Conjugate effect is stronger than (-I) effect(b) Conjugate effect is weaker than (-I) effect(c) Conjugate effect is same as (-I) effect(d) None of…
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…
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.”…
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…
A white light when passed through prism isDeviatedDispersedNone of theseAnswer: Dispersed 40 dB + 44 dB = ?40 dB41 dB44 dB45 dBAnswer: 45 dB A string fixed at both ends forms…
Temperature of a gas increases from 10C to 20C, what happens to the viscosity of the gas?IncreasesDecreasesRemains sameNone of theseAnswer: Increases Terminal velocity does not depends uponFalling timeAreamassviscosityAnswer: Falling time [PPSC…
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…