Pavan sorts some materials into two different groups and notes down their properties. They are listed in the following table: Group - I Group - II Cannot be beaten into thin sheets. Can be beaten into thin sheets. When one end is in contact with a hot object, the other end does not become hot quickly. When one end is in contact with a hot object, the other end becomes hot quickly. Cannot be turned into thin wires. Can be turned into thin wires. Which of the following statements could be incorrect?

Materials of group II can be used to make materials that are conductors of electricity

Materials of group II can be used to make bells

Materials of group I are generally not shiny and hard

Materials of group I are generally less dense than materials of group II

MCQ Questions for Class 10 Chemistry Metals And Non Metals Quiz 6

Non-metals are poor conductors of heat and tend to:

0%
Be brittle
0%
Conduct an electrical current
0%
Have a shiny luster
0%
Be malleable
0%
Be sonorous

When

F e_{2} O_{3}

$Fe_2O_3$ is heated with aluminium powder, the products obtained are _______ .

0%
$Fe$ , $Al_2O_3$ and heat.
0%
and $Al_2O_3$
0%
$FeO$ , $Al_2O_3$ and heat.
0%
$FeO$ and $Al_2O_3$

Explanation

When

F e_{2} O_{3}

$Fe_2O_3$ is heated with aluminium powder, the products obtained are

F e

$Fe$ ,

A l_{2} O_{3}

$Al_2O_3$ and

h e a t

$heat$ .

F e_{2} O_{3} + 2 A l \to 2 F e + A l_{2} O_{3} +

$\displaystyle Fe_2O_3 + 2Al \rightarrow 2 Fe +Al_2O_3 +$

h e a t

$heat$

Which of the following elements are present at the top of the reactivity series?

0%
Sodium
0%
Potassium
0%
Calcium
0%
Zinc

Explanation

The metals sodium, potassium, calcium, aluminium etc. are present at the top of the reactivity series.

Hence, the correct option is

D

$D$

1433126_553186_ans_867b8eb9988e4d978a71b0f75e625177.png

Cinnabar is _______ .

0%
$HgS$
0%
$HgO$
0%
$HgCl$
0%
$HgO.HgCl$

Explanation

Cinnabar is the most common ore of mercury. It has a chemical formula

H g S

$HgS$ , mercuric sulphide.

Metals found in a combined state in the earth's crust are known as:

0%
Native metal
0%
Minerals
0%
Substance
0%
Element

Explanation

The elements or compounds, which occur naturally in the earth’s crust, are known as minerals. Thus, Option

B

$B$ is correct.

Thermit reaction involves the reaction __________.

0%
of $Fe_2O_3$ with $Al$ to form $Fe$ and $Al_2O_3$
0%
of $Fe$ with $Al_2O_3$ to form $Fe_2O_3$ and $Al$
0%
$Cu_O$ with $Cu_2S$ to form $Cu$ and $SO_2$
0%
$ZnS$ with $O_2$ to form $ZnO$ and $SO_2$

Explanation

Thermit reaction involves the reaction of

F e_{2} O_{3}

$Fe_2O_3$ with

A l

$Al$ to form

F e

$Fe$ and

A l_{2} O_{3}

$Al_2O_3$ .

F e_{2} O_{3} + 2 A l \to 2 F e + A l_{2} O_{3} +

$\displaystyle Fe_2O_3 + 2Al \rightarrow 2 Fe +Al_2O_3 +$

h e a t

$heat$

Minerals that have a relatively high concentration of metal and can be extracted profitably from them are called:

0%
Substance
0%
Gold crust
0%
Ores
0%
Elements

Explanation

The elements or compounds, which occur naturally in the earth’s crust, are known as minerals. At some places, minerals contain a very high percentage of a particular metal and the metal can be profitably extracted from it. These minerals are called ores.

Thus, option

C

$C$ is correct.

When

C u_{2} S

$Cu_2S$ is heated in air, the products obtained are _______ .

0%
$Cu_2O$ , $SO_2$ and $Cu$
0%
$Cu_2O$ and $CuO$
0%
$Cu_2O$ , $SO_3$ and $Cu$
0%
$CuO$ , $SO_2$ , and $Cu$

Explanation

When

C u_{2} S

$Cu_2S$ is heated in air, the products obtained are

C u_{2} O

$Cu_2O$ ,

S O_{2}

$SO_2$ , and

C u

$Cu$ .

2 C u_{2} S + 3 O_{2} Δ - \to 2 C u_{2} O + 2 S O_{2}

$2Cu_2S + 3O_2 \xrightarrow {\Delta} 2Cu_2O + 2SO_2$

2 C u_{2} O + C u_{2} S Δ - \to 6 C u + S O_{2}

$2Cu_2O + Cu_2S \xrightarrow {\Delta} 6Cu + SO_2$

When manganese dioxide is heated with aluminium powder, the products obtained are:

0%
Mn, $Al_2O_3$ and heat
0%
MnO and $Al_2O_3$
0%
MnO, $Al_2O_3$ and heat
0%
Mn, and $Al_2O_3$

Explanation

When manganese dioxide is heated with aluminium powder, the products obtained are

$Mn$ ,

$Al_2O_3$ and heat.

$\displaystyle 3MnO_2 + 4Al \rightarrow 3 Mn +2Al_2O_3 +$

$heat$

Which of the following metals exist in free state?

0%
Gold
0%
Silver
0%
Copper
0%
All of the above

During electrolysis of molten sodium chloride:

0%
sodium is obtained at the cathode and chlorine is obtained at the anode.
0%
hydrogen is obtained at the cathode and oxygen is obtained at the anode.
0%
sodium is obtained at the anode and chlorine is obtained at the cathode.
0%
hydrogen is obtained at the anode and oxygen is obtained at the cathode.

Explanation

During electrolysis of molten

$NaCl$ , sodium metal is deposited at the cathode, whereas, chlorine is liberated at the anode. The reactions are:

At cathode:

$Na^+ + e^- \rightarrow Na$
At anode:

$2Cl^- \rightarrow Cl_2 + 2e^-$ .

Cinnabar is the ore of:

0%
$Zn$
0%
$Cd$
0%
$Hg$
0%
$Ag$

Explanation

Cinnabar is the most common and is the chief ore of mercury with the formula

$HgS$ .

Which of the following are found as sulphide ores?

0%
$Al,\ Hg,\ Pb,\ F$
0%
$Fe,\ Zn,\ Pb$
0%
$Hg,\ Pb,\ Na$
0%
$F,\ Ca,\ Cu,\ Mg$

Explanation

The metals in the middle of the activity series (Zn, Fe, Pb, etc.) are moderately reactive. They are found in the earth’s crust mainly as oxides, sulphides or carbonates. Hence, option

$B$ is correct.

Which of the following are found in Earth's crust mainly as oxides, sulphides and carbonates?

0%
Metals above in the activity series
0%
Metals in the middle of the activity series
0%
Metals at the bottom of the activity series
0%
All of these

Explanation

The metals in the middle of the activity series are moderately reactive. They are found in the earth’s crust mainly as oxides, sulphides, or carbonates. Thus, option

$B$ is correct.

How do the atoms combine in

$CaCl_2$ or Calcium Chloride?

0%
By forming metallic bond
0%
By forming co-ordinate covalent bond
0%
By forming ionic bond
0%
By forming covalent bond

Explanation

An ionic bond is formed in a molecule when one atom in the molecule transfers one or more electrons from itself to its neighbouring atom in the molecule.
In this molecule, calcium transfers its two electrons to its two neighbouring chlorine atoms and hence

$CaCl_2$ is an ionic compound.

Which of the following is the most important use of alloying?

0%
Make it more beautiful
0%
Gives desirable characteristics to the element
0%
Provides resistance to corrosion
0%
Both $B$ and $C$

Explanation

Alloying is a very good method of improving the properties of a metal. It also helps in the prevention of corrosion. Thus, the correct answer is

$D$

Stainless steel is made from:

0%
Iron & copper
0%
Iron, nickel and chromium
0%
Iron & nickel
0%
Iron & chromium

Explanation

When iron is mixed with nickel and chromium, we get stainless steel, which is hard and does not rust.

Thus, option

$\text{B}$ is correct.

Which of the following are found as carbonate ore in nature?

0%
$Fe$
0%
$Mg$
0%
$Zn$
0%
$Pb$

Explanation

The metals in the middle of the activity series

$(Zn, Fe, Pb)$ are moderately reactive. They are found in the earth’s crust mainly as oxides, sulfides or carbonates. Hence, options

$A, C, D$ are correct.

Carbon, Phosphorus, Sulphur are non-metals. Which of the following are their characteristics.

0%
Poor conductor of heat and electricity
0%
Don't produce sound when beaten together
0%
Brittle in nature
0%
Can be gaseous, liquid and solid at room temperature

Metals found at the top of the reactivity series are never found in free-state because

0%
they are less reactive
0%
they are highly reactive
0%
they are moderately reactive
0%
they are not at all reactive

Which one of the following can't be drawn into wires?

0%
$Fe$
0%
$Al$
0%
$Cu$
0%
$Cl$

Explanation

$Fe, Al$ and

$Cu$ are metals. Metals show the property of being ductile. They can be drawn into wires. Also, they are malleable. They can be drawn to thin sheets.

$Cl$ is non-metal and non-metals are non-ductile.

Which of the following is not a typical property of an ionic compound?

0%
High melting point.
0%
Conduct electricity in the molten and in the aqueous solution state.
0%
They are insoluble in water.
0%
They exist as oppositely charged ions even in the solid state.

The properties that are NOT possessed by non-metals are:

0%
Brittleness
0%
Non-conductivity
0%
Malleability
0%
Low density

The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is:

0%
$Cu_2O$
0%
$Cu$
0%
$CuO$
0%
$CuS$

Explanation

According to reactivity series, iron is more reactive than copper. So it will displace copper from copper sulphate.

$Fe+CuSO_4\rightarrow FeSO_4+Cu$

Copper is reddish brown in colour.

Non-metals can't be used to make vessels but metals can. Why?

0%
Non-metals are not sonorous.
0%
Metals can be drawn into wires, i.e. they possess ductility.
0%
Metals are good conductors of heat whereas non-metals are not.
0%
Non-metals are not lustrous.

Which of the following cannot be beaten into thin sheets?

0%
$Al$
0%
$K$
0%
$Ar$
0%
$Zn$

Explanation

$Ar$ is a non-metal and also a noble gas so it can't be beaten into thin sheets.

All the other options are metal and they possess malleability i.e., can be flattened into thin sheets by hammering or rolling.

Which of the following can't be beaten into sheets?

0%
Zinc
0%
Iron
0%
Aluminium
0%
Sulphur

Explanation

Malleability is the property of beating metal into sheets. If a piece of any metal – iron, copper, zinc or aluminium is beaten with a hammer it becomes longer and larger and does not break. Thus metals can be obtained as thin sheets.

In the given options sulphur is a non-metal which can not be beaten into sheets.

Hence, the correct option is

$D$ .

Which of the following elements cannot be beaten into thin wires?

0%
$O$
0%
$P$
0%
$S$
0%
All of these

Pavan sorts some materials into two different groups and notes down their properties.
They are listed in the following table:

Group - I	Group - II
Cannot be beaten into thin sheets.	Can be beaten into thin sheets.
When one end is in contact with a hot object, the other end does not become hot quickly.	When one end is in contact with a hot object, the other end becomes hot quickly.
Cannot be turned into thin wires.	Can be turned into thin wires.

Which of the following statements could be incorrect?

0%
Materials of group II can be used to make bells
0%
Materials of group I are generally not shiny and hard
0%
Materials of group I are generally less dense than materials of group II
0%
Materials of group II can be used to make materials that are conductors of electricity

In the table, the properties of some specimens are given.

Specimen	Melting Point	Shining	Malleability	Electric conductivity
$P$	High	more	No	insulator
$Q$	High	less	No	conductor
$R$	High	more	Yes	conductor
$S$	Low	less	Yes	low conductor

Which of the specimen is a metal?

0%
$R$
0%
$Q$
0%
$P$
0%
$S$

Explanation

$R$ is precisely a metal because it has a high melting point. It is lustrous, highly malleable and a good conductor of electricity.

CBSE Questions for Class 10 Chemistry Metals And Non Metals Quiz 6 - 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 6 - MCQExams.com

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Practice Class 10 Chemistry Quiz Questions and Answers

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