Reactivity of Different Metals with Oxygen

Q. Arrange the metals: calcium, iron, magnesium and sodium in order of their activity with water placing the most reactive first.

Q. Question 6
What are amphoteric oxides? Give two examples of amphoteric oxides.

Q.

Which of the following options represent correct decreasing order by which the metals: Na, Au, Cu and Mg will lose their lustre when exposed to air?

1. Mg > Cu > Na > Au

2. Na > Mg > Cu > Au

3. Cu > Mg > Au > Na

4. Au > Cu > Mg > Na

Q.

A metal which gives amphoteric oxide on reaction with oxygen gas is

1. Na (Sodium)

2. Al (Aluminium)

3. K (Potassium)

4. C (Carbon)

Q.

Write the name of the following compound:

${\mathrm{Na}}_2\mathrm{O}$

Q. Aqueous solution of ammonia reacts with aqueous metal salts to produce their respective metal hydroxides.

1. False
2. True

Q. You are given samples of three metals -sodium, magnesium and copper .suggest any two activities to arrange them in order of their decreasing reacti

explainexplain reactivity of metals on the basis of the reaction with water or acid or salt solutions.

Q.

What is the nature of metalic oxide?

1. Basic oxide

2. Amphoteric oxide

3. Salt

4. Acidic oxide

Q. Question 2

What kind of metals do not corrode easily?

Q. Question 2
Name two metals which are found in nature in the free state.

Q.

Ferric oxide reacts with aluminium to produce aluminium oxide and iron. The balanced chemical equation for the given reaction is :

$F{e}_2{O}_3$ + $2Al$ $\to$ $A{l}_2{O}_3$ + $2Fe$

Which of the following substances is oxidized in the given reaction?

1. Al2O3
2. $F{e}_2{O}_3$
3. Al
4. Fe

Q. Which one of the following four metals would be displaced from the solution of its salts by other three metals?

1. Magnesium
2. Zinc
3. Silver
4. Copper

Q.

Which substance is formed when aluminium reacts with oxygen?

1. ${Al}_2{O}_3$

2. $AlO$

3. ${Al}_{2}O$

4. $Al{O}_3$

Q. A metal 'X' reacts readily with the oxygen in the air but does not react with cold or hot water. The metal 'X' can be:

1. sodium
2. magnesium
3. potassium
4. iron

Q.

Which among the following metals will get corroded at the fastest rate on exposure to air and water is?

1. Copper

2. Zinc

3. Iron

4. Gold

Q. Metals combine with oxygen to form metal-oxides.

1. True
2. False

Q. does not react with oxygen even at high temperatures.

1. Copper
2. Magnesium
3. Gold
4. Silicon

Q. An alkali metal M reacts with to form metal oxide. The metal oxide formed is in nature.

1. hydrogen
2. oxygen
3. basic
4. acidic
5. amphoteric

Q.

Which metal is stored in kerosene oil due to its reactive nature with water and air?

1. Transition Metals

2. Metalloids

3. Alkali Metals

4. Alkaline Earth Metals

Q.

What is the nature of metalic oxide?