ICE CUBES ARE ADDED TO A GLASS OF WARM WATER. THE GLASS AND WATER ARE COOLED BY
A. conduction only B. convection only C. conduction and convection ✓ D. convection and radiation The answer to the question is: C. conduction and convection When ice cubes are added to a glass of warm water, the cooling process involves both conduction and convection.…
THREE DROPS OF A 1.0 MOL DM-3 SOLUTION OF NAOH ARE ADDED TO 20 CM3 OF A SOLUTION OF PH 8.4. THE PH OF THE RESULTING SOLUTION WILL
A. Close to that of pure water B. Unaltered C. Greater than 8.4 ✓ D. Less than 8.4 The answer to the question is: C. Greater than 8.4 When three drops of a 1.0 mol dm-3 solution of NaOH are added to…
WHEN SODIUM HYDROXIDE SOLUTION IS ADDED TO A SOLUTION OF ZINC SALT, THE WHITE PRECIPITATE FORMED RE-DISSOLVE IN EXCESS SODIUM HYDROXIDE BECAUSE
A. sodium hydroxide is a strong alkali B. sodium is more reactive than zinc C. zinc is more reactive than sodium D. zinc hydroxide is amphoteric ✓ E. zinc hydroxide is unstable The answer to the question is: D. zinc hydroxide is amphoteric When sodium…