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 Thermodynamics

Heat does not spontaneously flow from a colder body to a hotter one. Which of the following thermodynamics law states this?(a) Zeroth law of thermodynamics(b) First law of thermodynamics(c) Second law…

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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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Atomic Structure

The probability of finding the electron in the nucleus is?(a) 100% due to forces of attraction(b) finite for all orbitals(c) Zero for all orbitals(d) Zero for some orbitals and finite for…

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Atomic Structure

1. The probability of finding the electron in the nucleus is? 100% due to forces of attraction finite for all orbitals Zero for all orbitals Zero for some orbitals and finite…

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Aromatic compounds

1.Arenes do not show?(a) Delocalization of pi-Electrons(b) Greater Stability(c) Resonance(d) Electrophilic AdditionsAnswer: (d)Video Explanation Find the most stable carbonium ion here?(a) CH3CH2+(b) C6H5CH2+(c) C6H5CH2CH2+(d) (C6H5)2+Answer: (a)Video Explanation 3- Which of the…

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Test 8-10

Chromatography is a physical method that is used to separate and analyse __a) Simple mixturesb) Complex mixturesc) Viscous mixturesd)none of theseAnswer: bExplanationChromatography is a physical method that is used to separate…

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First Grand Test Section 01 to 07 Part 2

Gluconeogenesis involves the______. (PPSC 2021)?(a) synthesis of glycogen from glucose(b) breakdown of glycogen to form glucose(c) breakdown of glucose to produce pyruvate(d) None of the theseAnswer: dExplanationGluconeogenesis is the pathway by…

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