Reaction of Metals with Oxygen

Q.

Detailed solution of reaction of non metals with water

Q.

Why is iron pillar rust free?

Q.

What is the colour of the flame when magnesium burns in the presence of oxygen?

1. White

2. Blue

3. Green

4. Red

Q.

Why there is a black coating on silver?

Q.

How does magnesium react with hot water?

Q. Metal oxides are produced when metals burn in the presence of oxygen.

1. True
2. False

Q. Which of the following elements is preferred to be stored in kerosene oil?

1. Iron
2. Sodium
3. Silver
4. Carbon

Q. Statement 1: Magnesium burns in air with a dazzling white flame.
Statement 2: Metals on reaction with water produce metal oxide along with oxygen.

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

Q. Substance A reacts with oxygen to form an acidic oxide.
Substance B reacts with oxygen to form a basic oxide.
Oxides of A and B react with water to form X and Y respectively.
Which of the following statements are true?

1. A is a metal; B is a non-metal
2. A is a non-metal; B is a metal
3. X is a base; Y is an acid
4. X is an acid; Y is a base

Q.

The reddish brown layer of _________ on metal is called as rust.

1. sodium oxide

2. copper oxide

3. calcium oxide

4. ferric oxide

Q.

The statements given below are incorrect. Write the correct statements :

Calcium burns in oxygen with a golden-yellow flame.

Q.

Which of the following non-metals reacts and catches fire on exposure to air?

1. Phosphorus

2. Nitrogen

3. Sulphur

4. Hydrogen

Q.

When magnesium ribbon is burnt in the air it will form a compound X which is Y in colour. Identify X and Y.

1. X:- Magnesium hydroxide, Y:- Pink

2. X:- Magnesium oxide, Y:- White

3. X:- Magnesium oxide, Y:- Black

4. X:- Magnesium hydroxide, Y:- White

Q.

3. Write equations for reactions of potassium, magnesium, and phosphorus with oxygen.

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.

Write the names of three metals that do not corrode.

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

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

Q. Choose the correct option regarding the statements given below.

Statement 1: Magnesium burns in air with a dazzling white flame.

Statement 2: Metals on reaction with water produce metal oxide along with oxygen.

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

Q.

State whether the following statements are true or false and write the false statement correctly: Rusting is good for iron metal.

1. True
2. False

Q. Sodium reacts with cold water to form _____ and _____ gas.

1. sodium hydroxide, oxygen​
2. sodium oxide, hydrogen​
3. sodium hydroxide, hydrogen​
4. sodium chloride, chlorine​

Q.

In which of the following cases do iron rust?

1. when exposed to nitrogen and water.

2. When exposed to oxygen alone.

3. When exposed to water only.

4. When exposed to both water and oxygen.

Q. Substance A reacts with oxygen to form an acidic oxide.
Substance B reacts with oxygen to form a basic oxide.
Oxides of A and B react with water to form X and Y respectively.
Which of the following statements are true?

1. A is a metal; B is a non-metal
2. A is a non-metal; B is a metal
3. X is a base; Y is an acid
4. X is an acid; Y is a base

Q.

Magnesium ribbon on burning in air produces____________.

1. magnesium oxide, water, and light.

2. magnesium oxide and heat

3. magnesium oxide, heat, and light.

4. magnesium oxide, water, and heat.

Q. Substances A and B react with oxygen to form acidic oxide and basic oxide respectively. Oxides of A and B react with water to form X and Y respectively. Identify A, B, X, and Y.

Q. When magnesium ribbon is burnt in the air, it forms ________ which is _______ in colour. [0.5 marks]

(a) magnesium hydroxide, black
(b) magnesium oxide, white
(c) magnesium oxide, black
(d) magnesium hydroxide, white

Q.

_________ are formed when metals or non- metals react with oxygen in the air.

Q. Rusting of iron results in the formation of __________.

1. iron oxide
2. iron sulphate
3. sulphur dioxide
4. iron chloride

Q. Choose the correct option regarding the statements given below.

Statement 1: Magnesium burns in air with a dazzling white flame.

Statement 2: Metals on reaction with water produce metal oxide along with oxygen.

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

Q.

The chemical composition of rust is ____________.

Q. Which of the following statements are true regarding the reaction of metals with water?

1. All metals react with water.
2. Magnesium reacts with cold water.
3. Magnesium reacts with steam.
4. Potassium reacts with cold water.