Materials Metals And Non-Metals Test

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Materials Metals And Non-Metals Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

The corrosion of iron can be avoided by

A
reacting it with dilute HCl

B
reacting it with oxygen and water

C
putting it in a solution of copper sulphate

D
coating iron with a layer of tin or chromium

Solution

Iron objects are often coated with a layer of metals like tin or chromium in order to improve the appearance and to prevent corrosion.
Question 2
1 / -0

When combined chemically with metal atoms, non-metal atoms tend to

A
gain electrons to become negative ions

B
lose electrons to become positive ions

C
remain electrically neutral

D
Any of the above, depending upon the circumstances

Solution

Non-metals are electronegative elements and tend to gain electrons to form negative ions.
Metals, on the other hand, are electropositive elements and have tendency to lose electrons to form cations.
Thus, metals and non-metals react by electron transfer to form ionic compounds
Question 3
1 / -0

Which of the following halogens is used as an antiseptic in an alcoholic solution?

A
Fluorine

B
Bromine

C
Chlorine

D
Iodine

Solution

An alcoholic solution of iodine, known as tincture of iodine, is used as an antiseptic.
Question 4
1 / -0

Which among the following is an example of an alloy?

A
Boron

B
Bronze

C
Gold

D
Cobalt

Solution

Boron, gold and cobalt are elements.
Bronze is an alloy of copper and tin.
Question 5
1 / -0

Which of the following compositions represents the German silver alloy?

A
15% Copper, 25% Zinc, 60% Nickel

B
25% Copper, 15% Zinc, 60% Nickel

C
60% Copper, 25% Zinc, 15% Nickel

D
30% Copper, 40% Zinc, 30% Nickel

Solution

German silver is an alloy of copper, nickel and zinc and the percentage composition is as follows:
60% Copper, 25% Zinc, 15% Nickel
Question 6
1 / -0

On burning, metals react with oxygen to produce

A
acidic oxides

B
carbon dioxide

C
Basic oxides

D
nitric oxide

Solution

Metallic oxides are basic and dissolve in water to form a base.
The solution formed turns red litmus blue.
Question 7
1 / -0

Which among the following is a noble metal?

A
Sodium

B
Gold

C
Calcium

D
Zinc

Solution

Less reactive metals like gold, silver and platinum are referred to as noble metals.
Question 8
1 / -0

Which of the following statements is/are false?

a. The acidic, non-metal oxides turn blue litmus red.
b. Sulphur and phosphorus are the non-metals that are used in fireworks.
c. Non-metals react with dilute acids.

A
Only a

B
Only a and b

C
Only b

D
Only c

Solution

This is the correct option as this statement is false. Non-metals do not react with dilute acids.
Question 9
1 / -0

Solution(s) of which of the following with water turn(s) red litmus blue?

a. Magnesium oxide
b. Sulphur dioxide
c. Sodium oxide
d. Carbon dioxide

A
Only a and b

B
Only b and c

C
Only a and c

D
Only b and d

Solution

This is the correct option. Solutions of magnesium oxide and sodium oxide with water turn red litmus blue. Both magnesium oxide and sodium oxide are basic oxides.

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Re-Attempt Weekly Quiz Competition

Materials Metals And Non-Metals Test - 2

Result

Materials Metals And Non-Metals Test - 2

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SHARING IS CARING

Question 1

reacting it with dilute HCl

reacting it with oxygen and water

putting it in a solution of copper sulphate

coating iron with a layer of tin or chromium

Solution

Question 2

gain electrons to become negative ions

lose electrons to become positive ions

remain electrically neutral

Any of the above, depending upon the circumstances

Solution

Question 3

Fluorine

Bromine

Chlorine

Iodine

Solution

Question 4

Boron

Bronze

Gold

Cobalt

Solution

Question 5

15% Copper, 25% Zinc, 60% Nickel

25% Copper, 15% Zinc, 60% Nickel

60% Copper, 25% Zinc, 15% Nickel

30% Copper, 40% Zinc, 30% Nickel

Solution

Question 6

acidic oxides

carbon dioxide

Basic oxides

nitric oxide

Solution

Question 7

Sodium

Gold

Calcium

Zinc

Solution

Question 8

Only a

Only a and b

Only b

Only c

Solution

Question 9

Only a and b

Only b and c

Only a and c

Only b and d

Solution

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