Amphoteric Oxides of Metals

Q.

Give the chemical reaction between Tin and Water.

Q.

Why is Aluminum oxide considered as amphoteric oxide?

Q.

What is the valency of platinum?

Q. Rust (iron oxide), when dissolved in water, turns red litmus blue indicating that the solution is in nature.

1. acidic
2. basic
3. neutral

Q.

Oxides of metals are basic while those of non-metals are acidic. Explain.

Q.

Which of the following oxides are acidic, basic, and amphoteric, respectively?

1. MgO, Cl₂O, Al₂O₃

2. N₂O₃, Li₂O, Al₂O₃

3. SO₃, Al₂O₃, Na₂O

4. P₄O₁₀, Cl₂O, CaO

Q. Aluminium oxide is an example of a/an oxide.

1. acidic
2. basic
3. amphoteric

Q.

Write the equation for each of the following reactions:

Zinc oxide is treated with sodium hydroxide solution.

Q. Generally, metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the color of blue litmus to red?​

1. sulphur dioxide
2. magnesium oxide
3. iron oxide
4. copper oxide

Q.

Zinc oxide reacts with $Ca{\left(OH\right)}_2$ and $H_{2}S{O}_4$, thus it is a/an ________.

1. Amphoteric oxide

2. Rust

3. Metal hydroxide

4. Metallic oxide

Q.

Amphoteric oxides react only with acids to form salt and water.

1. True
2. False

Q.

The valencies of aluminium and chlorine in the compound $AlC{l}_3$ are

1. 1, 3

2. 3, 1

3. 3, 3

4. 1, 1

Q.

Zinc metal forms oxides having both acidic and _________nature.

Q. Zinc sulphate forms a colourless solution in water. Will you
observe any colour on adding copper turnings to it?

Q. After watching videos in the Byjus App one question that is not answered is what are Oxides?

Q.

An element has a valency of +3 what will be the formulae of its nitride.

Q.

What is AMPHOTERIC and COLLISION?

Q. Identify the metallic oxide which is amphoteric in nature :

1. zinc oxide
2. copper (II) oxide
3. barium oxide
4. calcium oxide

Q.

identify the elements which will form basic oxide, from the given list-carbon, magnesium,

sulphur, aluminium,

nitrogen, potassium.

Q. A metal X reacts with oxygen gas to form an amphoteric oxide. Identify the metal. Recall that amphoteric oxides show both acidic and basic behaviour.
$X+O_2\to \text{Amphoteric Oxide}$

1. Na (Sodium)
2. C (Carbon)
3. K (Potassium)
4. Al (Aluminium)

Q. Metals combine with oxygen to form _________ oxides.

1. basic
2. neutral
3. acidic
4. both A and B

Q. Which of the following Oxides is amphoteric?

Q.

An example of an amphoteric oxide.

1. CuO

2. Fe₂O₃

3. Al₂O₃

4. NO₂

Q.

A popular metal X reacts with oxygen gas to give an amphoteric oxide. Identify the metal X. Recall that amphoteric oxides show both acidic and basic behaviour.
$X+O_2\to \text{Amphoteric Oxide}$

1. Na (Sodium)

2. Al (Aluminium)

3. C (Carbon)

4. K (Potassium)

Q. Zinc oxide was added to dilute HCl and zinc oxide was added to dilute NaOH.Explain the difference?

Q.

${Al}_2{O}_3$ + $6HCl$ $\to$ $2Al{Cl}_3$ + $3H_{2}O$

${Al}_2{O}_3$ + $2NaOH$ $\to$ $2NaAl{O}_2$ + $H_{2}O$

(Sodium aluminate)

From the above reactions, you can conclude that _______.

1. Aluminum oxide is amphoteric.

2. Acid will give water.

3. Base contains H⁺.

4. Water is in between acid and base.

Q.

Which one of the following metal oxides shows both acidic and basic characters?

1. ${\mathrm{SO}}_2$

2. ${\mathrm{K}}_2\mathrm{O}$

3. ${\mathrm{Cu}}_2\mathrm{O}$

4. ${\mathrm{Al}}_2{\mathrm{O}}_3$

Q.

Non metallic oxides are:

1. Acidic in nature

2. Basic in nature

3. Amphoteric in nature

4. Neutral in nature

Q. The element that combines with oxygen to give an amphoteric oxide is:

1. $N$
2. $P$
3. $Al$
4. $Na$

Q. The amphoteric metallic oxide is:

1. zinc oxide
2. calcium oxide
3. copper (II) oxide
4. barium oxide