Materials Metals And Non-Metals Test

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Materials Metals And Non-Metals Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

On burning, metals react with oxygen to produce

A
acidic oxides

B
carbon dioxide

C
Basic oxides

D
nitric oxide

E
SO₂

Solution

Metallic oxides are basic and dissolve in water to form a base.
The solution formed turns red litmus blue.
Question 2
1 / -0

The constituents of which of the following alloys are lead and tin?

A
Steel

B
Stainless steel

C
Bronze

D
Solder

E
Brass

Solution

Its constituents are lead and tin.
Question 3
1 / -0

Which of the following metals does not react with water or even with steam?

A
Sodium

B
Magnesium

C
Copper

D
Zinc

E
Iron

Solution

Copper is less electropositive than hydrogen and cannot displace it from its compounds like water to liberate hydrogen gas.
It reacts neither with water nor with steam.
Question 4
1 / -0

Which of the following metals have low densities?

a. Sodium
b. Iron
c. Potassium
d. Copper

A
Only a and b

B
Only a and c

C
Only b and c

D
Only a and d

E
Only b and d

Solution

This is the correct option. Sodium and potassium have low densities.
Question 5
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

E
Only b and c

Solution

This is the correct option as this statement is false. Non-metals do not react with dilute acids.
Question 6
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

E
Only a and d

Solution

Metal oxides are generally basic in nature. Both magnesium oxide and sodium oxide are basic oxides and their solutions in water will turn red litmus blue.
Question 7
1 / -0

Which of the following elements is/are present in 22K gold?

A
Copper and silver

B
Copper or silver

C
Copper or zinc

D
Brass or zinc

Solution

22K gold contains either copper or silver. It is 22 parts of pure gold alloyed with 2 parts of either copper or silver. Pure gold is very soft with a low yield point. Thus, it is mixed with either copper or silver to increase its strength.
Question 8
1 / -0

An apparatus was set up to determine the conditions essential for rusting of iron as shown below:

Observe the image shown above and analyse which of the following statements is true:

A) Rusting will take place only in test tube B.
B) Rusting will take place both in test tubes A and B.
C) Rusting will take place both in test tubes B and C.
D) Rusting will take place only in test tube A.

A
A

B
C

C
B

D
D

Solution

Rusting takes place only when both air and water are available and these conditions are available in test tube A only.
Hence, the experiment will show the rusting of the nails placed in test tube A.
In test tube B, there is no air dissolved in the water and in test tube C, the air is dry.
Question 9
1 / -0

Riya's class teacher explained the physical properties of non-metals. According to her teacher, the non-metal that is in solid state and has lustre is

A
bromine

B
iodine

C
carbon

D
silicon

Solution

Iodine is the non-metal which is in solid state and has lustre.
Question 10
1 / -0

Raju is a student of class VIII and is curious to know the chemical nature of metals. While testing the chemical nature of metals, he noticed that a metal oxide reacts with dilute solutions of both acids and bases to produce hydrogen gas. This metal oxide is

A
magnesium

B
copper

C
aluminium

D
sodium

Solution

Aluminium forms amphoteric oxid, which reacts with both acids and bases to produce hydrogen gas, as shown below.
Question 11
1 / -0

While performing an experiment in chemistry lab, Ram prepares four solutions in test tubes 'A', 'B', 'C' and 'D', respectively. In test tube 'A', he adds copper sulphate solution. In test tube 'B', he adds zinc sulphate solution. In test tube 'C', he adds magnesium sulphate solution and in test tube 'D', he adds solution of calcium sulphate. After that, he adds iron nails in all test tubes. After some time, he notices that there is change in colour of solution in one of the test tubes. He observes the change in colour in which of the following test tubes and what is the changed colour?

A
Test tube 'D', brown colour

B
Test tube B', blue colour

C
Test tube 'C', blue colour

D
Test tube 'A, green colour

Solution

Iron (Fe) is more reactive than copper. It will displace copper from its solution and give green coloured solution of FeSO₄.
Question 12
1 / -0

According to Sweta's class teacher, metals are good conductors of electricity and heat. She tells Sweta about a liquid metal that is used in thermometers to test body temperature. The name of that liquid metal is

A
sodium

B
mercury

C
potassium

D
calcium

Solution

Mercury is the liquid metal that is used in thermometers.
Question 13
1 / -0

Which of the following properties of aluminium makes it useful to make parts of airplanes?

A
Hard and high density

B
Hard and low density

C
Ductile and high density

D
Malleable and soft

Solution

Aluminium, when mixed with other metals, gives hard alloy with low density, which makes it suitable for making parts of airplanes.
Question 14
1 / -0

Read the following statements and choose the correct answer.

Statement I: Sulphur on reaction with oxygen forms sulphur dioxide, which dissolves in water to form sulphuric acid.
Statement II: Sulphur is a non-metal that forms an acidic oxide, which turns blue litmus red.

A
Statement I is correct and Statement II is incorrect.

B
Statement I is incorrect and Statement II is correct.

C
Both the statements are correct.

D
Both the statements are incorrect.

Solution

Statement I is incorrect because sulphur dioxide on treatment with water gives sulphurous acid and not sulphuric acid.
Sulphur dioxide (SO₂) + water (H₂O) sulphurous acid (H₂SO₃)
Statement II is correct. Sulphur is a non-metal and forms acidic oxide, which turns blue litmus red.
Question 15
1 / -0

What are the constituents of stainless steel?

A
Iron and carbon

B
Iron, nickel and chromium

C
Iron and nickel

D
Iron and chromium

Solution

Stainless steel is an alloy of iron, nickel and chromium. Stainless steel is a durable and affordable metal that is used for a wide variety of purposes. It's strong, making it perfect for construction purposes, and it's corrosion resistant, so it can last a long time without being replaced or breaking.