Extraction of Metals

Q. Which among the following metals are available in free state in nature?

1. Iron
2. Sodium
3. Gold
4. Zinc

Q.

Silver is found in nature as a free element as well as compounds because:

1. Silver is present in the middle of the activity series.

2. Silver is highly reactive metal

3. Silver is present at the top of the activity series.

4. Silver is present at the bottom of the activity series.

Q.

Van Arkel method is used for refining copper metal.

1. True

2. False

Q.

Reactive metals do not occur in nature in free state.

1. True

2. False

Q. The metals that are found in free state are generally present _______ of the activity series.

1. at the top
2. in the middle
3. above hydrogen
4. at the bottom

Q.

Froth floatation process is used to concentrate magnetic ores.

1. True

2. False

Q. Which one of the following metals can be extracted only by the process of electrolysis?

1. Cu
2. Au
3. Al
4. Fe

Q.

Gold is found in the free state because:

1. It is present at the top of activity series

2. It is present at the bottom of activity series

3. It is present in the middle of activity series

4. Gold is highly reactive metal

Q.

The most abundant metal in the earth crust is

1. Al

2. Oxygen

3. Cu

4. Fe

Q. Statement 1: It is easier to extract the metals that are present at the top of the reactivity series.
Statement 2: Metals at the top of the reactivity series are highly reactive in comparison with the metals at the bottom.

1. Both statements are true.
2. Both statements are false.
3. Only statement 1 is true.
4. Only statement 2 is true.