Question Set C

cbse 10th Standard Science Metals and Non-Metals Important Questions And Answers Study Material - QB365

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Questions:

Multiple Choice Question

72 x 1 = 72

Shown below is a container that is used in the transportation of goods over long distances.

These containers are made of steel. Which property of steel is mainly used to make these containers?

(a)

Its ductility

(b)

Its malleability

(c)

Its metallic lustre

(d)

Its electrical conductivity

Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it as shown in figure. The gas evolved is

(a)

O₂

(b)

SO₂

(c)

CO₂

(d)

H₂ and SO₂

Listed here is the reactivity of certain metals.

Metal	Reaction with air	Reaction with water	Reaction with dilute acids
Gold	Does not oxidise or burn	No reaction	No reaction
Sodium	Burns vigorously to form Oxide	Violent reaction	Violent reaction
Zinc	Burns to form oxides	Reacts on heating with water	Reacts to produce hydrogen
Platinum	Does not oxidise or burn	No reaction	No reaction

Which of the above metals are likely to be obtained in their pure states from the Earth's crust?

(a)

Only gold

(b)

Only sodium

(c)

Gold and platinum

(d)

Zinc and sodium

Bronze is an alloy of

(a)

copper and zinc

(b)

aluminum and tin

(c)

copper, tin and zinc

(d)

copper and tin

A piece of zinc (Zn)-a reactive metal-was dropped into a test tube containing a substance. A zinc salt was formed and hydrogen gas was liberated. This is shown in the equation below.
Zn⁺ \(\rightarrow\) Zinc salt + H₂ gas
Which of the following can be the substance that zinc was dropped into?
P. water
Q. hydrochloric acid
R. a solution of a zinc salt

(a)

Only P

(b)

Only Q

(c)

Only R

(d)

Either P or R

Which of the following metals, do not corrode in moist air?

(a)

Copper

(b)

Iron

(c)

Gold

(d)

Silver

The following diagram shows the electrolytic refining of copper:

Which of the following statements is Incorrect description of the process?

(a)

The impure metal from the anode dissolves into the electrolyte.

(b)

The pure metal from the electrolyte is deposited on the cathode.

(c)

Insoluble impurities settle down at the bottom of the anode.

(d)

On passing the current through the electrolyte, the pure metal from the anode dissolves into the electrolyte

In the given experimental set-up, if the experiment is carried out separately with each of the following solutions the cases in which the bulb will glow is

(a)

dilute hydrochloric acid

(b)

honey

(c)

glucose solution

(d)

alcohol

During the electrolytic refining of copper, what happens at the anode?

(a)

Copper ions gain electrons to become neutral copper atoms.

(b)

Neutral copper atoms gain electrons to becomes ions.

(c)

Copper ions lose electrons to become neutral atoms.

(d)

Neutral copper atoms lose electrons to become ions.

10.

The diagram shows the reaction between metal and dil. acid.

What is the reason for different behaviour of Mg in test tube B?

(a)

Mg is lighter element than dil HCI

(b)

Mg reacts with dil. HCl to produce H₂ gas which helps in floating

(c)

Mg reacts with dil HCl to produce N₂, gas which helps in floating

(d)

Mg reacts with dil HCl to produce CO₂ gas which helps in floating

11.

ldentify gas A in the following experiment.

(a)

Nitrogen

(b)

Hydrogen

(c)

Oxygen

(d)

Carbon dioxide

12.

An element 'X' reacts with O₂ to give a compound with a high melting point. This compound is also soluble in water. The element 'X' is likely to be

(a)

iron

(b)

calcium

(c)

carbon

(d)

silicon

13.

Sodium hydroxide is termed an alkali while ferric hydroxide is not because

(a)

sodium hydroxide is a strong base, while ferric hydroxide is a weak base.

(b)

sodium hydroxide is a base which is soluble in water while ferric hydroxide is also a base but it is not soluble in water.

(c)

sodium hydroxide is a strong base while ferric hydroxide is a strong acid.

(d)

sodium hydroxide and ferric hydroxide both are strong base but the solubility of sodium hydroxide in water is comparatively higher than that of ferric hydroxide.

14.

A reactive metal (M) is treated with H₂SO₄ (dil). The gas is evolved and is collected over the water as shown in the figure:

The correct conclusion drawn is

(a)

the gas is oxygen.

(b)

the gas is lighter than air.

(c)

the gas is SO₂ and is lighter than air.

(d)

the gas is H₂ and is heavier than air.

15.

Which of the following reaction shows that the given oxide is amphoteric in nature?

(a)

\(2 \mathrm{Zn}+\mathrm{O}_2 \xrightarrow{\Delta} 2 \mathrm{ZnO}\)

(b)

\(\mathrm{ZnO}+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \mathrm{ZnSO}_4+\mathrm{H}_2 \mathrm{O}(l)\)

(c)

\(\mathrm{ZnO}+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_2 \mathrm{ZnO}_2+\mathrm{H}_2 \mathrm{O}(l)\)

(d)

(b) and (c) together

16.

Arrange the following metals in the order of their decreasing reactivity: Fe, Cu, Mg, Ca, Zn,Ag

(a)

Ca > Zn > Mg > Cu > Ag > Fe

(b)

Ca > Zn > Cu > Mg > Ag > Fe

(c)

Ca > Mg > Zn > Fe > Cu > Ag

(d)

Ca > Mg > Fe > Zn > Cu > Ag

17.

Identify an ore containing sulphur in it

(a)

Siderite

(b)

Fluorspar

(c)

Iron pyrites

(d)

Calamine

18.

Magnesium dissolves in hot water to form

(a)

MgO

(b)

Mg(OH)₂

(c)

MgOH

(d)

MgO.Mg(OH)₂

19.

Which of the following oxides, on reduction with carbon gives metal?

(a)

Al₂O₃

(b)

ZnO

(c)

MgO

(d)

All of these

20.

Cu + 2Ag(NO₃)₂ \(\longrightarrow \) CU(NO₃)₂ + 2Ag
Pb + CU(NO₃)₂ \(\longrightarrow \) Pb(NO₃)₂ + Cu
Zn + Pb(NO₃)₂ \(\longrightarrow \) Zn(NO₃)₂ + Pb
The most reactive metal is

(a)

(b)

(c)

(d)

21.

The method used for reduction of mercuric oxide to mercury is

(a)

Heating

(b)

Chemical reduction

(c)

Calcination

(d)

Electrolytic reduction

22.

The process of coating of Zn over Fe is known as

(a)

Cathodic protection

(b)

Metallurgy

(c)

Tinning

(d)

Galvanization

23.

The electronic configuration of three element X, Y and Z are
X - 2,8
Y - 2, 8, 6
Z - 2, 8, 1
Which of the following is correct?

(a)

X is a metal

(b)

Z is a non-metal

(c)

Y is a metal

(d)

X and Yare non-metal and Z is a metal

24.

5 mL each of cone. HCI, HNO₃ and a mixture of cone. HCl (15 mL) and cone. HNO₃ (5 mL) were taken in test tubes labelled as A, Band C. A small piece of metal was put in each tube. No change occurred in test tube A and B but the metal got dissolved in test tube C. The metal could be

(a)

(b)

(c)

(d)

25.

Which of the following are not ionic compounds?

(a)

CaCl₂

(b)

MgCl₂

(c)

NaCl

(d)

CCl₄

26.

Which of the following will not evolve CO₂ upon heating?

(a)

CaCO₃

(b)

MgCO₃

(c)

ZnCO₃

(d)

Na₂CO₃

27.

An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that

(a)

Green solution slowly turns brown

(b)

Lower end of test tube become slightly warm

(c)

A colourless gas with the smell of burning sulphur is observed

(d)

Light green solution changes to blue.

28.

Which among the following alloys contain non-metal as one of its constituents

(a)

Brass

(b)

Amalgam

(c)

Gun metal

(d)

None of these

29.

A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail which is

(a)

soft and dull

(b)

hard and fading

(c)

smooth and shining

(d)

rough and granular

30.

During smelting, an additional substance is added which combines with impurities to form a fusible product known as

(a)

slag

(b)

mud

(c)

gangue

(d)

flux

31.

Rusting of iron takes place in

(a)

ordinary water

(b)

distilled water

(c)

both ordinary and' distilled water

(d)

none of the above

32.

A greenish coating develops on copper utensils due to formation of

(a)

CuCO₃

(b)

Cu(OH)₂

(c)

Cu(OH)₂.CuCO₃

(d)

CuO

33.

An alloy of Zn and Cu is dissolved in dil. HCl. Hydrogen gas is evolved. In this evolution of gas

(a)

only zinc reacts with dil. HCl

(b)

only copper reacts with dil. HCl

(c)

both zinc and copper react with dil. HCI

(d)

only copper reacts with water

34.

The second most abundant metal in the earth's crust is

(a)

oxygen

(b)

silicon

(c)

aluminium

(d)

iron

35.

When iron fillings are heated in a stream of dry hydrogen chloride the compound formed is FeCl_x where X is

(a)

(b)

(c)

(d)

36.

Which of the following metals is present in the anode mud during the electrolytic refining of copper?

(a)

Sodium

(b)

Aluminium

(c)

Gold

(d)

Iron

37.

Which one of the following figures correctly describes the process of electrolytic refining?

(a)

(b)

(c)

(d)

38.

Which of the following can undergo a chemical reaction?

(a)

MgSO₄ + Fe

(b)

ZnSO₄ + Fe

(c)

MgSO₄ + Pb

(d)

CuSO₄ + Fe

39.

Which of the following non-metals is a liquid?

(a)

Carbon

(b)

Bromine

(c)

Phosphorus

(d)

Sulphur

40.

Electrical wires have a coating of an insulating material. The material, generally used is

(a)

Sulphur

(b)

Graphite

(c)

PVC

(d)

All can be used

41.

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

(a)

Diamond

(b)

Graphite

(c)

Sulphur

(d)

Fullerene

42.

Although metals form basic oxides, which of the following metals form an amphoteric oxide?

(a)

(b)

(c)

(d)

43.

The electronic configurations of three elements X, Y and Z are X - 2, 8; Y - 2, 8, 7 and Z - 2, 8, 2. Which of the following is correct?

(a)

X is a metal

(b)

Y is a metal

(c)

Z is a non-metal

(d)

Y is a non-metal and Z is a metal

44.

Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?

(a)

Has high melting point

(b)

Has low melting point

(c)

Conducts electricity in molten state

(d)

Occurs as solid

45.

Which among the following alloys contain mercury as one of its constituents?

(a)

Stainless steel

(b)

Alnico

(c)

Solder

(d)

Zinc amalgam

46.

Which among the following statements is incorrect for magnesium metal?

(a)

It burns in oxygen with a dazzling white flame.

(b)

It reacts with cold water to form magnesium oxide and evolves hydrogen gas

(c)

It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.

(d)

It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.

47.

Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?

(a)

Brass

(b)

Bronze

(c)

Amalgam

(d)

Steel

48.

An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following

(a)

(b)

(c)

(d)

49.

During electrolytic refining of zinc, it gets

(a)

Deposited on cathode

(b)

Deposited on anode

(c)

Deposited on cathode as well as anode

(d)

Remains in the solution

50.

An electrolytic cell consists of
(i) Positively charged cathode
(ii) Negatively charged anode
(iii) Positively charged anode
(iv) Negatively charged cathode

(a)

(i) and (ii)

(b)

(iii) and (iv)

(c)

(i) and (iii)

(d)

(ii) and (iv)

51.

An alloy is

(a)

An element

(b)

A compound

(c)

A homogeneous mixture

(d)

A heterogeneous mixture

52.

2 ml each of concentrated HCl, HNO₃ and a mixture of concentrated HCl and concentrated HNO₃ in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occured in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be

(a)

(b)

(c)

(d)

53.

Which one of the following four metals would be displaced from the solution of its salts by other three metals?

(a)

(b)

(c)

(d)

54.

Generally, non-metals are not lustrous. Which of the following nonmetal is lustrous?

(a)

Sulphur

(b)

Oxygen

(c)

Nitrogen

(d)

Iodine

55.

Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i) Na (ii) Ca (iii) Fe (iv) Cu

(a)

(i) and (iv)

(b)

(iii) and (iv)

(c)

(i) and (iii)

(d)

(i) and (ii)

56.

Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?

(a)

(b)

(c)

(d)

57.

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of

(a)

CuSO₄

(b)

CuCO₃

(c)

Cu(NO₃)₂

(d)

CuO

58.

Stainless steel is very useful material for our life. In stainless steel, iron is mixed with

(a)

Ni and Cr

(b)

Cu and Cr

(c)

Ni and Cu

(d)

Cu and Au

59.

Galvanisation is a method of protecting iron from rusting by coating with a thin layer of

(a)

Gallium

(b)

Aluminium

(c)

Zinc

(d)

Silver

60.

Silver articles become black on prolonged exposure to air. This is due to the formation of

(a)

Ag₃N

(b)

Ag₂O

(c)

Ag₂S

(d)

Ag₂S and Ag₃N

61.

Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(i) Au (ii) Cu (iii) Na (iv) K

(a)

(i) and (ii)

(b)

(i) and (iii)

(c)

(ii) and (iii)

(d)

(iii) and (iv)

62.

Which of the following metals exist in their native state in nature?
(i) Cu (ii) Au (iii) Zn (iv) Ag

(a)

(i) and (ii)

(b)

(ii) and (iii)

(c)

(ii) and (iv)

(d)

(iii) and (iv)

63.

Which one of the following properties is not generally exhibited by ionic compounds?

(a)

Solubility in water

(b)

Electrical conductivity in solid state

(c)

High melting and boiling points

(d)

Electrical conductivity in molten state

64.

Which of the following are not ionic compounds?
(i) KCl (ii) HCl (iii) CCl₄ (iv) NaCl

(a)

(i) and (ii)

(b)

(ii) and (iii)

(c)

(iii) and (iv)

(d)

(i) and (iii)

65.

The composition of aqua-regia is

(a)

Dil.HCl : Conc.HNO₃ [3 : 1]

(b)

Conc.HCl : Dil.HNO₃ [3 : 1]

(c)

Conc.HCl : Conc.HNO₃ [3 : 1]

(d)

Dil.HCl : Dil.HNO₃ [3 : 1]

66.

Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?

(a)

H₂SO₄

(b)

HCl

(c)

HNO₃

(d)

All of these

67.

What happens when calcium is treated with water?

(i) It does not react with water.

(ii) It reacts violently with water.

(iii) It reacts less violently with water.

(iv) Bubbles of hydrogen gas formed stick to the surface of calcium.

(a)

(i) and (iv)

(b)

(ii) and (iii)

(c)

(i) and (ii)

(d)

(iii) and (iv)

68.

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

(a)

FeO

(b)

Fe₂O₃

(c)

Fe₃O₄

(d)

Fe₂O₃ and Fe₃O₄

69.

Which one of the following metals do not react with cold as well as hot water?

(a)

(b)

(c)

(d)

70.

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

(i) Good thermal conductivity

(ii) Good electrical conductivity

(iii) Ductility

(iv) High melting point

(a)

(i) and (ii)

(b)

(i) and (iii)

(c)

(ii) and (iii)

(d)

(i) and (iv)

71.

The ability of metals to be drawn into thin wire is known as

(a)

Ductility

(b)

malleability

(c)

Sonorousity

(d)

conductivity

72.

Which of the following properly is generally not shown by metals?

(a)

Electrical conduction

(b)

Sonorous in nature

(c)

Dullness

(d)

Ductility

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Answers Key:

Multiple Choice Question

72 x 1 = 72

(b)
Its malleability

(b)
SO₂

(d)
copper and tin

(b)
Only Q

(a)
The impure metal from the anode dissolves into the electrolyte.

(a)
dilute hydrochloric acid

(d)
Neutral copper atoms lose electrons to become ions.

10.

(b)
Mg reacts with dil. HCl to produce H₂ gas which helps in floating

11.

(b)
Hydrogen

12.

(b)
calcium

13.

(b)
sodium hydroxide is a base which is soluble in water while ferric hydroxide is also a base but it is not soluble in water.

14.

(b)
the gas is lighter than air.

15.

(d)
(b) and (c) together

16.

17.

18.

(b)
Mg(OH)₂

19.

(b)
ZnO

20.

(d)
Zn

21.

(a)
Heating

22.

(d)
Galvanization

23.

(d)
X and Yare non-metal and Z is a metal

24.

(b)
Au

25.

(d)
CCl₄

26.

(d)
Na₂CO₃

27.

(a)
Green solution slowly turns brown

28.

(d)
None of these

29.

(d)
rough and granular

30.

(a)
slag

31.

32.

(b)
Cu(OH)₂

33.

(a)
only zinc reacts with dil. HCl

34.

(d)
iron

35.

(b)
2

36.

(d)
Iron

37.

38.

(d)
CuSO₄ + Fe

39.

(b)
Bromine

40.

41.

(b)
Graphite

42.

43.

(d)
Y is a non-metal and Z is a metal

44.

(b)
Has low melting point

45.

(d)
Zinc amalgam

46.

(b)
It reacts with cold water to form magnesium oxide and evolves hydrogen gas

47.

(d)
Steel

48.

(b)
Na

49.

(a)
Deposited on cathode

50.

(b)
(iii) and (iv)

51.

52.

(b)
Au

53.

(d)
Cu

54.

(d)
Iodine

55.

(d)
(i) and (ii)

56.

(d)
Hg

57.

(b)
CuCO₃

58.

(a)
Ni and Cr

59.

60.

61.

(a)
(i) and (ii)

62.

63.

(b)
Electrical conductivity in solid state

64.

(b)
(ii) and (iii)

65.

66.

67.

(d)
(iii) and (iv)

68.

69.

(d)
Fe

70.

(d)
(i) and (iv)

71.

(a)
Ductility

72.

cbse 10th Standard Science Metals and Non-Metals Important Questions And Answers Study Material - QB365 Set C

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Std: 10th Standard CBSE - Science

chapter: Metals and Non-Metals - Important Questions And Answers

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