Chemistry - Online Test

In zero order reactions, increase in the concentration of reactant does not alter the rate. So statement (i) is wrong.

k = A e ^{– (Ea/RT)}

if Ea = 0  so, statement (ii) is correct, and statement (iii) is wrong

k = A e⁰

k = A

ln k = ln A – (E_a /R) (1/ T)

this equation is in the form of a straight line equatoion

y = c + m x

a plot of lnk vs 1/T is a straight line with negative slope

so statements (iv) and (v) are wrong.

HCOONa Basic in nature. + H ⋅OH ↔ NaOH strong base  + H-COOH weak acid

C₆H₅NH₃Cl^- + H ⋅ OH ↔ H₃O⁺Acidic +C₆H₅ -NH₂ + Cl^-

KCN basic + H− OH ↔ KOH strong base + HCN weak acid

basic, acidic, basic is correct.

m=ZIt

(mass of 1 mole of Cl₂ gas = 71)

t = m/ ZI  (∴mass of 0.1mole of Cl₂ gas = 7.1 g mol⁻¹ )

 = 7.1 / [71/(2 ×96500) × 3 ]

 (2 Cl- → Cl₂ +2e^- )

= (2 × 96500 × 7.1) / (71× 3)

 = 6433.33sec

 = 107.2 min