silvery white and very soft metal.

silvery white and very hard metal.

colourless and very soft metal.

MCQ Questions for Class 10 Chemistry Metals And Non Metals Quiz 4

The non-metal which is hard is :

0%
sulphur
0%
chlorine
0%
graphite
0%
diamond

Explanation

Carbon is a non-metal that can exist in different forms. These forms only differ in structure and each form is called an allotrope.

Diamond, an allotrope of carbon, is the hardest natural substance known and has a very high melting and boiling point.

So, the answer is option

D

$D$ .

Corrosion of metals can be prevented when contact between metal and .......... is cut off.

0%
Nitrogen
0%
Hydrogen
0%
Oxygen
0%
Carbon

Which metals react with cold water?

0%
Sodium, calcium, potassium
0%
Iron, calcium, magnesium
0%
Iron, sodium, magnesium
0%
Silver, sodium, magnesium

Metal which does not react even with steam is :

0%
potassium
0%
iron
0%
aluminium
0%
silver

Explanation

Potassium metal reacts violently with cold water to produce potassium hydroxide and hydrogen gas. This is an exothermic reaction because evolved hydrogen gas immediately catches fire.

Iron and aluminum metal do not react with cold or warm water easily but they react with steam to produce metal oxides and hydrogen gas.

Silver metal does not react with cold water as well as steam because silver metal is very stable.

Hence, option

D

$D$ is correct.

Which does not react with dilute hydrochloric acid?

0%
Copper
0%
Zinc
0%
Iron
0%
Mercury

Which among the following is a non-metal?

0%
Bromine
0%
Zinc
0%
Sodium
0%
Iron

To protect iron from corrosion and rust, it is coated by:

0%
Tin
0%
Copper
0%
Zinc
0%
Mercury

Explanation

The iron is coated with zinc. This stops the corrosion and rust of iron. This process is called galvanization. This zinc stops oxygen and water from reaching the metal underneath. Hence, option

C

$C$ is correct.

When dilute hydrochloric acid is added to granulated zinc placed in a test tube, the observation made is _____________.

0%
the surface of the metal turns hining
0%
the reaction mixture turns milky
0%
odour of chlorine is observed
0%
a colourless and odourless gas evolves with bubbles

Explanation

When dilute hydrochloric acid is added to granulated zinc placed in a test tube, a colourless and odourless gas is evolved with bubbles.

The chemical reaction can be written as:

Zn + 2HCl

\to

$\rightarrow$ ZnCl

_{2}

$_{2}$ + H

_{2}

$_{2}$

Hence, correct option is

D

$\text{D}$ .

A small piece of silver is placed in a solution containing both magnesium nitrate and copper (II) nitrate. Which one of the following occurs?

0%
No reaction takes place
0%
The silver dissolves and only copper is seen
0%
The silver dissolves and only magnesium is seen
0%
A mixture of magnesium and copper forms on the silver

Explanation

Silver is the metal that is present at the bottom of the reactivity series, below

M g

$Mg$ and

C u

$Cu$ metals. So, it cannot displace these metals from its solution. As a result, no reaction takes place with the piece of silver.

Different techniques are used for obtaining the metals falling in each category. The metals high up in the reactivity series are obtained by:

0%
reduction with carbon
0%
electrolytic reduction
0%
reduction by heating
0%
displacement reaction

Which of the following methods is suitable for preventing an iron vessel from rusting ?

0%
Applying grease
0%
Applying paint
0%
Applying a coat of zinc
0%
All of the above.

Explanation

The rusting of iron can be prevented by painting, greasing or galvanising which is a process of applying a coat of zinc.

Hence, the correct option is

D

$\text{D}$ .

When sodium reacts with cold water, then the product formed will be:

0%
$Na_2O$
0%
$NaOH$
0%
$Na_2CO_3$
0%
all of these

Explanation

Sodium is very reactive and it reacts with water to form sodium hydroxide which is a very strong base.

Reaction

N a + H_{2} O \to N a O H + \frac{1}{2} H_{2}

$Na + H_2O \rightarrow NaOH + \dfrac12H_2$

The electronic configuration of two elements

X

$X$ and

Y

$Y$ are given below:

X = 2, 8, 2

$X = 2, 8 ,2$

Y = 2, 8, 7

$Y = 2, 8, 7$
The formula of a compound that can be formed between these two elements is:

0%
$X Y$
0%
$X { Y }_{ 2 }$
0%
${ X }_{ 2 }Y$
0%
$X { Y }_{ 3 }$

Explanation

X = 2, 8, 2 ⟶

$X=2,8,2\longrightarrow$ valance

e^{-} = 2

$e^-=2$

Y = 2, 8, 7 ⟶

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

So, the compound will be

X Y_{2}

$XY_2$

Example

M g C l_{2}

$MgCl_2$

Calcium is stored in kerosene.

0%
True
0%
False

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

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

0%
Copper
0%
Mercury
0%
Iron
0%
Zinc

Which one of the following configurations represents metallic character?

0%
2, 8, 2
0%
2, 8, 4
0%
2, 8, 7
0%
2, 8, 8

Explanation

2, 8, 4 = 14 represents silicon and it is metalloid.
2, 8, 7 = 17 represents chlorine and it is a non-metal
2, 8, 8 = 18 is argon and it is a noble gas
2, 8, 2 = 12 is magnesium and it is an alkaline earth metal

So 2, 8, 2 represents metallic character.

Option

A

$A$ is correct.

Which of the following statement is incorrect?

0%
Metals like $Cu, Ag, Au$ cannot displace $H$ from acids
0%
In reactivity series metals are arranged in order of increasing reactivity
0%
Silver cannot displace $Cu$ from $CuSO_4$
0%
Zinc displaces $Cu$ from $CuSO_4$

Explanation

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 > N a > C a > M g > A l > Z n > F e > P b > H > C u > H g > A g > A u

$K>Na>Ca>Mg>Al>Zn>Fe>Pb>H>Cu>Hg>Ag>Au$

Thus, option

B

$B$ is incorrect.

Why are non-metals poor conductors of electricity?

0%
They have high melting point
0%
They are brittle
0%
They do not have free electrons
0%
All of above

Which of the following methods is employed to prevent rusting?

0%
Refining
0%
Alloying
0%
Greasing
0%
both (b) and (c)

Explanation

The rusting of iron can be prevented by greasing or alloying but refining is method to obtain pure metal from it's ore, thus, option

D

$D$ is correct.

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

0%
gallium, mercury
0%
mercury, chlorine
0%
mercury, bromine
0%
bromine, mercury

Explanation

Mercury is the only liquid metal and Bromine is the only liquid non-metal at the room temperature.

option $C$ is correct.

Magnesium displaces hydrogen from dilute sulphuric acid.

0%
True
0%
False

Explanation

The reactivity series follows the order:

K > N a > C a > M g > A l > Z n > F e > P b > H > C u > H g > A g > A u

$K>Na>Ca>Mg>Al>Zn>Fe>Pb>H>Cu>Hg>Ag>Au$

Thus,

M g

$Mg$ is above

H

$H$ and can displace hydrogen.

Sodium is a:

0%
silvery white and very soft metal.
0%
colourless and hard metal.
0%
silvery white and very hard metal.
0%
colourless and very soft metal.

Zinc

+

$+$ Hydrochloric acid

\to

$\rightarrow$

0%
Zinc chloride + Hydrogen
0%
Zinc + chlorine + Hydrogen
0%
Zinc + Hydrogen
0%
Zinc

Explanation

(A)

$(A)$ Zinc chloride + Hydrogen

R e a s o n

$Reason$ : The reaction between zinc and hydrochloric acid is ,

Z n + 2 H C l

$Zn + 2HCl$

\to

$\rightarrow$

Z n C l_{2}

$ZnCl_{2}$ +

H_{2}

$H_{2}$

This reaction is known as single replacement reaction, where zinc metal displaces the hydrogen to form hydrogen gas and zinc chloride, a salt.

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

0%
negative force
0%
positive force
0%
electrostatic force
0%
none of the above

State True or False.

Non-metals are good conductors of heat.

0%
True
0%
False

Which of the following is the only liquid metal which is a poor conductor of heat, but a fair conductor of electricity?

0%
Copper
0%
Calcium
0%
Mercury
0%
Rhodium

When zinc reacts with dilute hydrochloric acid, the gas evolved is:

0%
hydrogen
0%
chlorine
0%
hydrogen chloride
0%
none of these

Explanation

When

Z n

$Zn$ reacts with dilute

H C l,

$HCl,$

H_{2}

$H_2$ gas is evolved.

Reaction:

Z n + 2 H C l ⟶ Z n C l_{2} + H_{2}

$Zn+2HCl\longrightarrow ZnCl_2+H_2$

Which of the following when stretched would break into pieces?

0%
Aluminium
0%
Phosphorus
0%
Iron
0%
Calcium

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

0%
a, b
0%
a, c
0%
b, c
0%
a, d

Mark the correct option:
a) Pure metal from the electrolyte is deposited at the anode.
b) The soluble impurities go into the solution.
c) Insoluble impurities are known as anode mud.

0%
a, b
0%
b, c
0%
a, c
0%
All statements are correct

Explanation

On passing the current through the electrolyte, pure metal from the anode dissolves into the electrolyte. An equivalent amount of pure metal from the electrolyte is deposited on the cathode.
The soluble impurities get dissolved in the electrolytic solution and the insoluble impurities settle down below the anode and are known as Anode mud.

Thus, Option

B

$B$ is correct

CBSE Questions for Class 10 Chemistry Metals And Non Metals Quiz 4 - MCQExams.com

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Practice Class 10 Chemistry Quiz Questions and Answers

CBSE Questions for Class 10 Chemistry Metals And Non Metals Quiz 4 - MCQExams.com

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Practice Class 10 Chemistry Quiz Questions and Answers

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