According to Faraday's first law of electrolysis, the mass of substance deposited is directly proportional to:
A. Electrode area
B. Time of electrolysis
C. Current passed
D. Quantity of electricity passed
Answer: Option D
Solution (By JKExamLibrary)
Faraday's first law: m ∝ Q, where m = mass deposited, Q = charge passed (current × time). So mass deposited is directly proportional to the quantity of electricity (coulombs). While m ∝ I and m ∝ t individually are true for constant parameters, the exact law states m = ZIt = ZQ, where Z is electrochemical equivalent. The law directly links mass to Q. Faraday's second law deals with equivalent masses.
Explanation:
N₂ has a triple bond (N≡N), consisting of one sigma and two pi bonds. This is the strongest type of covalent bond, giving N₂ high stability and low reactivity. Bond order is 3. The molecule is diatomic and nonpolar.
Explanation:
Potassium (K) is at the top of the reactivity series, meaning it is the most reactive among the given metals. The order of reactivity (decreasing): K > Na > Ca > Mg > Al > Zn > Fe > Pb > Cu > Ag > Au. Potassium reacts violently with water and oxygen. Copper (Cu) is relatively unreactive and is found native in nature. Exam trick: Remember 'Please Stop Calling Me A Cute Zebra...' mnemonic.
Explanation:
PVC (polyvinyl chloride) is a polymer of vinyl chloride (CH₂=CHCl). It is used in pipes, electrical insulation, and flooring. It can be rigid (uPVC) or flexible with plasticizers. It is a thermoplastic. Chlorate/carbon/carbide are not correct expansions.
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