Assertion : `Zn(s)+Cu^(2+)(aq)rarrZn^(2+)(aq)+Cu(s)` can be split into following two half reactions `underset(("oxidation half reaction"))(Zn(s)rarrZn^(2+)+2e^(-))` Reason : Every redox reaction can be split into two reactions, one representing loss of electrons and the other representing gain of electrons. `Cu^(2+)(aq)+2e^(-)rarrunderset(("reduction half reaction"))(Cu(s))`A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation AC. A is true but R is falseD. A is false but R is true

Assertion : `Zn(s)+Cu^(2+)(aq)rarrZn^(2+)(aq)+Cu(s)` can be split into

1.	Assertion : `Zn(s)+Cu^(2+)(aq)rarrZn^(2+)(aq)+Cu(s)` can be split into following two half reactions `underset(("oxidation half reaction"))(Zn(s)rarrZn^(2+)+2e^(-))` Reason : Every redox reaction can be split into two reactions, one representing loss of electrons and the other representing gain of electrons. `Cu^(2+)(aq)+2e^(-)rarrunderset(("reduction half reaction"))(Cu(s))`A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation AC. A is true but R is falseD. A is false but R is true
Answer» Correct Answer - A

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`0.80 g` of sample of impure potassium dichromate was dissolved in water and made up to `500 mL` solution. `25 mL` of this solution treated with excess of `KI` in acidic medium and `I_(2)` liberated required `24 mL` of a sodium thiosulphate solution. `30 mL` of this sodium thiosulphate solution required `15 mL` of `N//20` solution of pure potassium dichromate. What was the percentage of `K_(2)Cr_(2)O_(7)` in given sample?A. `73.5%`B. `75.3%`C. `36.75%`D. none of these
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The unbalanced equation for the reaction of `P_(4)S_(3)` with nitrate in aqueous acidic medium is given below : `P_(4)S_(3)+NO_(3)^(-)rarrH_(3)PO_(4)+SO_(4)^(2-)+NO` the number of moles of water reuired per mole of `P_(4)S_(3)` is :A. 18B. `(8)/(3)`C. 8D. 28
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