Chemistry Past Questions and Answers

zn + 2HCl → ZnCl<sub style='font-size: smaller;'>2</sub> + H<sub style='font-size: smaller;'>2</sub><br/>The rate of the above reaction will be greatly increased if

Zn + H<sub style='font-size: smaller;'>2</sub> SO<sub style='font-size: smaller;'>4</sub> → ZnSO<sub style='font-size: smaller;'>4</sub> + H<sub style='font-size: smaller;'>2</sub><br/>in the above reaction how much zinc will be left of 1.0 M of H<sub style='font-size: smaller;'>2</sub>SO?<br/>[Zn =65, s = 32, O = 16, H = 1]

30 cm<sup style='font-size: smaller;'>3</sup> of 0.1 M Al (NO<sub style='font-size: smaller;'>3</sub>)<sub style='font-size: smaller;'>3</sub> SOLUTION IS RECTED WITH 100cm<sup style='font-size: smaller;'>3</sup> of 0.15M of NaOH solution. Which reactant is in excess, and by now much ?

In the above experiment, the litmus paper will initially

Sodium chloride may be obtained from brine by