Metals

Q.

What is the definition of malleability?

Q.

Why is Sodium kept in Kerosene?

Q.

Name the metal which is kept in kerosene and why.

Q.

Which of the following metal is the main constituents of haemoglobin?

1. Na

2. Fe

3. Cu

4. Mg

Q.

A material in which electrons are tightly bound and cannot move freely at room temperature is called

Q.

The constituent of haemoglobin is _______.

1. Iron

2. Sodium

3. Copper

4. Magnesium

Q.

A man painted his main gate made up of iron, to i) prevent it from rusting. ii) protect it from the sun. iii) make it look beautiful. iv) make it dust-free. Which of the above statement(s) is/are correct?

1. (i) and (ii)

2. (ii) and (iii)

3. only (ii)

4. (i) and (iii)

Q.

Name the following:

A metal that is liquid at room temperature.

Q.

Pick the odd one out.

1. Silk

2. Cotton

3. Copper wire

4. Wool

Q.

Define rusting? What are the two necessary conditions for rusting of iron? Give the chemical name of the rust.

Q.

Which of the following is a metal?

1. Nitrogen

2. Oxygen

3. Sodium

4. Carbon

Q.

Metals are non-sonorous.

1. True
2. False

Q.

Give one word or a phrase for the following.

Reddish-brown coloured hydrated oxide of iron formed during rusting.

Q.

Explain the following term.

Oil painting

Q.

1 (A) Fill in the blanks

(i) At room temperature metal _________ is found in liquid state. (arsenic /mercury)

Q.

Write two uses for the following-

Platinum

Q.

Which metal exists as a liquid at room temperature.

1. Copper

2. Silver

3. Gold

4. Mercury

Q.

What makes a conductor a good conductor?

Q. When calcium burns in the presence of oxygen, it forms ‘X’, which when mixed with water forms ‘Y’.
Based on this, choose the correct statement.

Q.

Name the following

A metal that was expensive, very hundred years back but is cheap today

Q.

What are the conditions necessary required for rusting?

Q.

State two uses of the following metal

(g) aluminium

Q.

What is rusting? How is rusting prevented?

Q. Which of the following is not malleable?

1. Gold
2. Mercury
3. None of above
4. Silver

Q.

List any five properties of metals and non-metals

Q.

• How can you prevent iron from rusting?

Q. Metals are usually ________ in nature.

1. soft
2. hard
3. data insufficient
4. none of above

Q. Fill in the blanks :
To prevent rusting , the underside of the ships is coated with _______ .

1. nitric acid
2. phosphoric
3. oxygen
4. red lead oxide paint

Q. balance the following skeletalequation
.H2+N2=NH3

Q. Name two metals which react with dilute sulphuric acid or dilute hydrochloric acid to liberate hydrogen gas. Support your answer by writing fully balanced equations of any one of the named metal with (a) dilute sulphuric acid, (b) dilute hydrochloric acid. ( related to hydrogen)