Metals and Non-metals Test

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Metals and Non-metals Test - 34

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Weekly Quiz Competition

Question 1
1 / -0

At room temperature an example of a liquid metal is ______and that of a liquid non-metal is______ .

A
gallium, mercury

B
mercury, chlorine

C
mercury, bromine

D
bromine, mercury

Solution

Mercury is the only liquid metal and Bromine is the only liquid non-metal at the room temperature.
option $$C$$ is correct.
Question 2
1 / -0

Sodium is a:

A
silvery white and very soft metal.

B
colourless and hard metal.

C
silvery white and very hard metal.

D
colourless and very soft metal.

Solution

Sodium is a silvery-white metal that is a very soft and highly reactive metal that can be freshly cut with a knife.
Question 3
1 / -0

The negative and positive ions are held by _________ of attraction.

A
negative force

B
positive force

C
electrostatic force

D
none of the above

Solution

The electrostatic force is an attractive and repulsive force between particles is caused due to their electric charges so negative and positive ions are held by the electrostatic force of attraction. This results in the formation of an ionic bond or electrovalent bond.
Question 4
1 / -0

The electronic configuration of two elements $$X$$ and $$Y$$ are given below:
$$X = 2, 8 ,2$$
$$Y = 2, 8, 7$$
The formula of a compound that can be formed between these two elements is:

A
$$X Y$$

B
$$X { Y }_{ 2 }$$

C
$$ { X }_{ 2 }Y$$

D
$$X { Y }_{ 3 }$$

Solution

$$X=2,8,2\longrightarrow $$ valance $$e^-=2$$

$$Y=2,8,7 \longrightarrow$$ Valancy is = 1 electron

So, the compound will be $$XY_2$$

Example $$MgCl_2$$
Question 5
1 / -0

Find the odd one out from the following set of metals.

(1) Copper
(2) Mercury
(3) Iron
(4) Zinc

A
Copper

B
Mercury

C
Iron

D
Zinc

Solution

Mercury is a liquid metal whereas all the other three are solid metals. So mercury is the odd one out.

Option B is correct.
Question 6
1 / -0

Which of the following statement is incorrect?

A
Metals like $$Cu, Ag, Au$$ cannot displace $$H$$ from acids

B
In reactivity series metals are arranged in order of increasing reactivity

C
Silver cannot displace $$Cu$$ from $$CuSO_4$$

D
Zinc displaces $$Cu$$ from $$CuSO_4$$

Solution

In activity series metals are arranged in decreasing order of reactivity. The metals present at top of the series are highly reactive while metals and can displace the metals present at the bottom.
The reactivity series follows the order:
$$K>Na>Ca>Mg>Al>Zn>Fe>Pb>H>Cu>Hg>Ag>Au$$
Thus, option $$B$$ is incorrect.
Question 7
1 / -0

Why are non-metals poor conductors of electricity?

A
They have high melting point

B
They are brittle

C
They do not have free electrons

D
All of above

Solution

Non-metals do not have enough free electrons to pass electricity efficiently. Electrons in non-metals are held tightly, they are no allowed to move freely.
Question 8
1 / -0

Copper occurs as a/an _________.
(a) oxide ore (b) halide ore (c) carbonate ore (d) sulphide ore

A
a, b

B
a, c

C
b, c

D
a, d

Solution

Copper occurs both in the free state as well as in the combined state as sulfide or oxide ores.
Question 9
1 / -0

Which of the following when stretched would break into pieces?

A
Aluminium

B
Phosphorus

C
Iron

D
Calcium

Solution

Non-metals are non-malleable and non-ductile. So, phosphorous which is a non-metal, would break into pieces if stretched.
Question 10
1 / -0

Iodine cannot be transformed into a wire because:

A
It is lustrous

B
It is brittle

C
Both A and B

D
None of above

Solution

Iodine is a non-metal which is brittle, it breaks and shatters easily when hammered. Hence, it cannot be used to make thin wires and is non-ductile.

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Re-Attempt Weekly Quiz Competition

Metals and Non-metals Test - 34

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Metals and Non-metals Test - 34

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SHARING IS CARING

Question 1

gallium, mercury

mercury, chlorine

mercury, bromine

bromine, mercury

Solution

Question 2

silvery white and very soft metal.

colourless and hard metal.

silvery white and very hard metal.

colourless and very soft metal.

Solution

Question 3

negative force

positive force

electrostatic force

none of the above

Solution

Question 4

$$X Y$$

$$X { Y }_{ 2 }$$

$$ { X }_{ 2 }Y$$

$$X { Y }_{ 3 }$$

Solution

Question 5

Copper

Mercury

Iron

Zinc

Solution

Question 6

Metals like $$Cu, Ag, Au$$ cannot displace $$H$$ from acids

In reactivity series metals are arranged in order of increasing reactivity

Silver cannot displace $$Cu$$ from $$CuSO_4$$

Zinc displaces $$Cu$$ from $$CuSO_4$$

Solution

Question 7

They have high melting point

They are brittle

They do not have free electrons

All of above

Solution

Question 8

a, b

a, c

b, c

a, d

Solution

Question 9

Aluminium

Phosphorus

Iron

Calcium

Solution

Question 10

It is lustrous

It is brittle

Both A and B

None of above

Solution

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