In the following schematic diagram of the preparation of hydrogen gas as shown in figure 12, what would happen if following changes are made?

In place of zinc, copper turnings are taken

In the following schematic diagram of the preparation of hydrogen gas as shown in figure 12, what would happen if following changes are made? In place of zinc granules, same amount of zinc dust is taken in the test tube.

In the following schematic diagram of the preparation of hydrogen gas as shown in figure 12, what would happen if following changes are made? Instead of dilute sulphuric acid, dilute hydrochloric acid is taken.

In the following schematic diagram of the preparation of hydrogen gas as shown in figure 12, what would happen if following changes are made? Sodium hydroxide is taken in place of dilute sulphric acid and the tube is heated.

A man leaves his home early in the morning to have a walk. He arrives at a junction of roads A and B as shown in figure. He takes the following steps in later journies : (i) 1 km in North direction. (ii) Changes direction and moves in North-East direction for 2 sqrt(2) km. (iii) Changes direction and moves Southwards for distance of 2 km. (iv) Finally he changes the direction and moves in South-East direction to reach road A again. Now if roads A and B are taken as X-axis and y-axis ,then visible point representing the graph of y=f(x) Then the value of x at which function f(x) is discontinous

A man leaves his home early in the morning to have a walk. He arrives at a junction of roads A and B as shown in figure. He takes the following steps in later journies : (i) 1 km in North direction. (ii) Changes direction and moves in North-East direction for 2 sqrt(2) km. (iii) Changes direction and moves Southwards for distance of 2 km. (iv) Finally he changes the direction and moves in South-East direction to reach road A again. Now if roads A and B are taken as X-asix and Y-axis, then visible point representing the graph of y = f(x). Then the value of x at which function f(x) is discontionous

A man leaves his home early in the morning to have a walk. He arrives at a junction of roads A and B as shown in figure. He takes the following steps in later journies : (i) 1 km in North direction. (ii) Changes direction and moves in North-East direction for 2 sqrt(2) km. (iii) Changes direction and moves Southwards for distance of 2 km. (iv) Finally he changes the direction and moves in South-East direction to reach road A again. Now if roads A and B are taken as X-asix and Y-axis, then visible point representing the graph of y = f(x). Then the value of x at which function f(x) is discontionous