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Advantage of soap over detergent : Soap are biodegradable whereas detergents are non-biodegradable. Difference in chemical behaviour of compound of hydrogen with elements of atomic number 17 and 20.

Answer» <html><body><p></p>Solution :a. <a href="https://interviewquestions.tuteehub.com/tag/atomic-2477" style="font-weight:bold;" target="_blank" title="Click to know more about ATOMIC">ATOMIC</a> number 17 = <a href="https://interviewquestions.tuteehub.com/tag/chlorine-915874" style="font-weight:bold;" target="_blank" title="Click to know more about CHLORINE">CHLORINE</a>, and atomic number 20 = calcium. <br/> b. `H_(2)+CI_(2)to2HCI` <br/> `CI_(2)` is <a href="https://interviewquestions.tuteehub.com/tag/oxidizing-2906555" style="font-weight:bold;" target="_blank" title="Click to know more about OXIDIZING">OXIDIZING</a> <a href="https://interviewquestions.tuteehub.com/tag/agent-369049" style="font-weight:bold;" target="_blank" title="Click to know more about AGENT">AGENT</a>, `H_(2)` is reducing agent. <br/> `Ca+H_(2)toCaH_(2)`</body></html>


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