Metals and Non-metals Test

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Metals and Non-metals Test - 44

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Weekly Quiz Competition

Question 1
1 / -0

The figure shows a car bumper coated with chromium.

Why are car bumpers often coated with chromium?

A
(i) and (ii) only

B
(ii) and (iii) only

C
(iii) and (i) only

D
(i),(ii) and (iii) only

Solution

Car bumpers are coated with chromium because chromium forms an oxide layer and helps in the prevention of rust formation and corrosion.
Hence, option A is correct.
Question 2
1 / -0

The metal which does not displace hydrogen from dil. HCl is:

A
Ag

B
Mg

C
Al

D
Fe

Solution

Metals such as copper, silver, gold and platinum are less reactive than hydrogen. Hence, they cannot displace hydrogen from dil. HCl.
Question 3
1 / -0

The order of reactivity of four metals and hydrogen is given below.
Which of the following does not give hydrogen as a product?

A
The adding of Rubidium to water.

B
The adding of tin to dilute Hydrochloric acid.

C
The electrolysis of aqueous gold chloride.

D
The electrolysis of aqueous rubidium chloride.
Question 4
1 / -0

Identify the non-metal which is a good conductor of electricity.

A
Chlorine

B
Sulphur

C
Graphite

D
Phosphorus

Solution

Non-metals, in general, are bad conductors of electricity. But graphite, an allotrope of carbon, and a non-metal is an exception. It is a good conductor of electricity.
Question 5
1 / -0

The gas given off when a metal reacts with an acid is

A
hydrogen

B
oxygen

C
carbon dioxide

D
water vapour

Solution

When a metal reacts with an acid, the gas produced is hydrogen.

$$Metal + Acid \rightarrow Salt + Hydrogen$$
Question 6
1 / -0

The acid solution is taken in two test tubes. Zinc is introduced in the first test tube and magnesium in the second. Gas is evolved in the second test tube which burns with a pop sound while no gas is evolved from the first test tube. Identify the acid solution taken in the two test tubes.

A
$$HCl$$

B
$$HNO_{3}$$

C
$$H_{2}SO_{4}$$

D
$$H_{3}PO_{4}$$
Question 7
1 / -0

Elements and compounds that occur naturally in the earth's crust are called:

A
materials

B
metals

C
gases

D
minerals

Solution

Minerals are elements and compounds found naturally in the earth's crust. They can be metals as well as non-metals.
Question 8
1 / -0

Carbon cannot reduce the oxides of sodium to sodium because

A
$$Na$$ has less affinity for oxygen

B
$$Na$$ has more affinity for carbon than oxygen

C
$$Na$$ is non-reactive

D
$$Na$$ has more affinity for oxygen than carbon

Solution

The metals high up in the activity series are very reactive. They cannot obtain by reduction of their oxides by carbon. Since, sodium is high up in the acitivity series, carbon cannot reduce the oxides of sodium because it has more affinity for oxygen than carbon.
Question 9
1 / -0

Fill in the blanks by selecting the option with the correct words.
The process of removing impurities from the impure metal to obtain pure metal is known as _____of metal. The most widely used method for refining is _________. In this method, the impure metal is taken as ________ and the pure metal is taken as _____.

A
refining, electrolytic refining, anode, cathode

B
calcination, electrolysis, cathode, anode

C
refining, smelting, cathode, anode

D
smelting, calcination, anode, cathode

Solution

The process of removing impurities from impure metal is called refining.
Electrolytic refining is a widely used method of refining as it is a cost-effective and efficient method.
During the process, the impure metals are taken as anode and, pure metals are taken as the cathode. As electrolysis proceeds, the pure metal keeps depositing on the cathode and, the impurities settle at the bottom.
Hence the correct option is A.
Question 10
1 / -0

Mark the correct statements:

(i) mercury can be refined by the process of distillation.

(ii) In poling, the molten impure metal is stirred with green poles of wood.

(iii) In electrolyte refining of metals, impure metal is made as cathode and a thin strip of pure metal is made as anode.

A
(i) and (ii)

B
(i) and (iii)

C
(ii) and (iii)

D
(i), (ii) and (iii)

Solution

Low boiling point metals like Mercury are purified with distillation.
Hence, statement (i) is correct.

The heat of copper makes the pole emit wood gas that reduces the cuprous oxide to copper.
In poling, the molten impure metal is stirred with green poles of wood.
Hence,option (ii) is correct.

In electrolyte refining of metals, impure metal is made as Anode and a thin strip of pure metal is made as cathode.
Hence, option (iii) is incorrect.

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Metals and Non-metals Test - 44

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Metals and Non-metals Test - 44

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Question 1

(i) and (ii) only

(ii) and (iii) only

(iii) and (i) only

(i),(ii) and (iii) only

Solution

Question 2

Ag

Mg

Al

Fe

Solution

Question 3

The adding of Rubidium to water.

The adding of tin to dilute Hydrochloric acid.

The electrolysis of aqueous gold chloride.

The electrolysis of aqueous rubidium chloride.

Question 4

Chlorine

Sulphur

Graphite

Phosphorus

Solution

Question 5

hydrogen

oxygen

carbon dioxide

water vapour

Solution

Question 6

$$HCl$$

$$HNO_{3}$$

$$H_{2}SO_{4}$$

$$H_{3}PO_{4}$$

Question 7

materials

metals

gases

minerals

Solution

Question 8

$$Na$$ has less affinity for oxygen

$$Na$$ has more affinity for carbon than oxygen

$$Na$$ is non-reactive

$$Na$$ has more affinity for oxygen than carbon

Solution

Question 9

refining, electrolytic refining, anode, cathode

calcination, electrolysis, cathode, anode

refining, smelting, cathode, anode

smelting, calcination, anode, cathode

Solution

Question 10

(i) and (ii)

(i) and (iii)

(ii) and (iii)

(i), (ii) and (iii)

Solution

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