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Physical Properties Of Metals -2 - Class 10 MCQ


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20 Questions MCQ Test Extra Documents, Videos & Tests for Class 10 - Physical Properties Of Metals -2

Physical Properties Of Metals -2 for Class 10 2024 is part of Extra Documents, Videos & Tests for Class 10 preparation. The Physical Properties Of Metals -2 questions and answers have been prepared according to the Class 10 exam syllabus.The Physical Properties Of Metals -2 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Physical Properties Of Metals -2 below.
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Physical Properties Of Metals -2 - Question 1
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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.

Detailed Solution for Physical Properties Of Metals -2 - Question 1

Calcium reacts comparatively less violently with water and floats on the surface due to hydrogen gas sticking to the surface of the metal.

Physical Properties Of Metals -2 - Question 2
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Which one of the following figures correctly describes the process of electrolytic refining ?

Detailed Solution for Physical Properties Of Metals -2 - Question 2

Correct Answer :- c

Explanation:-

Electrolytic refining is the process of refining impure metals by using electricity. In this process, impure metal is made the anode and a strip of pure metal is made the cathode. A solution of a soluble salt of the same metal is taken as the electrolyte. When an electric current is passed, metal ions from the electrolyte are deposited at the cathode as pure metal and the impure metal from the anode dissolves into the electrolyte in the form of ions. The impurities present in the impure metal gets collected below the anode. This is known as anode mud.

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Physical Properties Of Metals -2 - Question 3
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The ability of the metals to be drawn into thin wires is known as 

Detailed Solution for Physical Properties Of Metals -2 - Question 3

The ability of a metal to be drawn into wires is called ductility.

Physical Properties Of Metals -2 - Question 4
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Which of the following can undergo a chemical reaction ?
Detailed Solution for Physical Properties Of Metals -2 - Question 4
Explanation:
To determine which of the given options can undergo a chemical reaction, we need to identify the substances that can react with each other and form new compounds. Let's analyze each option:
Option A:
- MgSO4 is magnesium sulfate, a compound consisting of magnesium ions (Mg2+) and sulfate ions (SO42-).
- Fe is iron, a metal.
This option does not include a reactive pair, so it is unlikely to undergo a chemical reaction.
Option B:
- ZnSO4 is zinc sulfate, a compound consisting of zinc ions (Zn2+) and sulfate ions (SO42-).
- Fe is iron, a metal.
This option also does not include a reactive pair, so it is unlikely to undergo a chemical reaction.
Option C:
- MgSO4 is magnesium sulfate, a compound consisting of magnesium ions (Mg2+) and sulfate ions (SO42-).
- Pb is lead, a metal.
This option does not include a reactive pair, so it is unlikely to undergo a chemical reaction.
Option D:
- CuSO4 is copper sulfate, a compound consisting of copper ions (Cu2+) and sulfate ions (SO42-).
- Fe is iron, a metal.
This option includes a reactive pair: copper sulfate (CuSO4) and iron (Fe). Copper sulfate can react with iron to form iron sulfate (FeSO4) and copper (Cu). Therefore, option D can undergo a chemical reaction.
Conclusion:
Based on the analysis, the correct answer is option D: CuSO4 + Fe. This pair can undergo a chemical reaction.
Physical Properties Of Metals -2 - Question 5
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Which of the following metals exist in their native state in nature ?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag  
Detailed Solution for Physical Properties Of Metals -2 - Question 5

Au and Ag are unreactive metals and therefore exist in their native state.

Physical Properties Of Metals -2 - Question 6
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Although metals form basic oxides, which of the following metals form an amphoteric oxide ?
Detailed Solution for Physical Properties Of Metals -2 - Question 6

To determine which metal forms an amphoteric oxide, we need to understand the concept of amphoteric oxides and the properties of the given metals.
Amphoteric Oxides:
Amphoteric oxides are oxides that can act as both acids and bases, meaning they can react with both acids and bases. They have the ability to donate or accept protons.
Properties of the Given Metals:
Let's analyze the properties of each metal to determine which one forms an amphoteric oxide:
A. Sodium (Na):
- Sodium is an alkali metal.
- Alkali metals tend to form basic oxides, not amphoteric oxides.
- Therefore, Na does not form an amphoteric oxide.
B. Calcium (Ca):
- Calcium is an alkaline earth metal.
- Alkaline earth metals also tend to form basic oxides.
- Therefore, Ca does not form an amphoteric oxide.
C. Aluminum (Al):
- Aluminum is a metalloid.
- Metalloids have properties between metals and nonmetals.
- Aluminum oxide (Al2O3), also known as alumina, is an amphoteric oxide.
- It can react with both acids and bases, exhibiting acidic or basic properties depending on the conditions.
- Therefore, Al forms an amphoteric oxide.
D. Copper (Cu):
- Copper is a transition metal.
- Transition metals generally form basic oxides, not amphoteric oxides.
- Therefore, Cu does not form an amphoteric oxide.
Conclusion:
Based on the properties of the given metals, the metal that forms an amphoteric oxide is Aluminum (Al).
Physical Properties Of Metals -2 - Question 7
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Galvanisation is a method of protecting iron from rusting by coating with a thin layer of 
Detailed Solution for Physical Properties Of Metals -2 - Question 7

Coating a metal with zinc is called galvanisation.

Physical Properties Of Metals -2 - Question 8
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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 ?
Detailed Solution for Physical Properties Of Metals -2 - Question 8

X = 2,8 = 10 : it is the electronic configuration of neon. 
Y = 2,8,7 = 17 : it is the configuration of the halogen  family of chlorine atom which is not metal. 
Z = 2,8,2 = 12 : it is the configuration of alkaline earth metals of magnesium atom which is metal. 
Therefore, X is a noble gas, Y is a non Metal and Z is a metal. 

Physical Properties Of Metals -2 - Question 9
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Stainless steel is very useful material for our life. In stainless steel, iron is mixed with 
Detailed Solution for Physical Properties Of Metals -2 - Question 9

Nickel and chromium are added to iron to make stainless steel.

Physical Properties Of Metals -2 - Question 10
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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 ? 
Detailed Solution for Physical Properties Of Metals -2 - Question 10

To determine which property is not shown by compound Z, let's analyze the given options:
A: Has high melting point
- This property refers to the temperature at which a solid substance changes to a liquid state.
- It is possible for compound Z to have a high melting point, as some compounds formed by the reaction between X and Y can have strong intermolecular forces, leading to high melting points.
B: Has low melting point
- This property refers to the temperature at which a solid substance changes to a liquid state.
- Compound Z cannot have a low melting point since it is mentioned that X loses an electron and Y gains an electron during the reaction. This suggests that the compound formed is likely to have strong bonding, which typically results in higher melting points.
C: Conducts electricity in molten state
- This property refers to the ability of a substance to conduct electricity when it is in a molten (liquid) state.
- It is possible for compound Z to conduct electricity in the molten state if it contains ions that are free to move and carry charge.
D: Occurs as solid
- This property refers to the physical state of the compound at room temperature and pressure.
- Compound Z is mentioned to occur as a solid, so this property is shown by it.
Therefore, the property not shown by compound Z is low melting point (option B).
Physical Properties Of Metals -2 - Question 11
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Generally, non-metals are not lustrous. Which of the following non-metal is lustrous ?
Detailed Solution for Physical Properties Of Metals -2 - Question 11

 Iodine is a lustrous substance.

Physical Properties Of Metals -2 - Question 12
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Which among the following alloys contain mercury as one of its constituents ?
Detailed Solution for Physical Properties Of Metals -2 - Question 12
Answer:
The alloy that contains mercury as one of its constituents is Zinc amalgam. Let's break down the options and explain them in detail:
1. Stainless steel: Stainless steel is an alloy composed mainly of iron, carbon, and chromium. It does not contain mercury as one of its constituents.
2. Alnico: Alnico is an alloy composed of aluminum, nickel, and cobalt. It does not contain mercury as one of its constituents.
3. Solder: Solder is an alloy used for joining metals together. It typically consists of tin and lead, but it does not contain mercury as one of its constituents.
4. Zinc amalgam: Zinc amalgam is an alloy composed of zinc and mercury. It is used in dentistry for dental fillings. This is the correct answer to the question.
In conclusion, out of the given options, only Zinc amalgam contains mercury as one of its constituents.
Physical Properties Of Metals -2 - Question 13
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Which one of the following four metals would be displaced from the solution of its salts by other three metals ?
Detailed Solution for Physical Properties Of Metals -2 - Question 13

Silver metal would be displaced from the solution of its salts by other three  metals because Ag is less reactive than Mg, Zn and Cu.

Physical Properties Of Metals -2 - Question 14
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Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
Detailed Solution for Physical Properties Of Metals -2 - Question 14
Alloys containing non-metal as one of its constituents:
- Steel: Steel is an alloy of iron and carbon, where carbon is a non-metal. It is widely used in construction, machinery, and various industries.
Alloys that do not contain non-metals as constituents:
- Brass: Brass is an alloy of copper and zinc, where both copper and zinc are metals.
- Bronze: Bronze is an alloy of copper and tin, where both copper and tin are metals.
- Amalgam: Amalgam is an alloy of mercury with one or more other metals, where all the constituents are metals.
Therefore, among the given options, the alloy that contains a non-metal as one of its constituents is steel.
Physical Properties Of Metals -2 - Question 15
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Which of the following are not ionic compounds ?
(i) KCl
(ii) HCl 
(iii) CCl4
(iv) NaCl
Detailed Solution for Physical Properties Of Metals -2 - Question 15

CCl4 is non-ionic, HCl becomes ionic only in water.

Physical Properties Of Metals -2 - Question 16
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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
Detailed Solution for Physical Properties Of Metals -2 - Question 16
Identification of the Element:


To identify the element, we need to analyze the given properties and compare them with the properties of the elements mentioned in the options.
Soft and can be cut with a knife:


This property suggests that the element is a metal, as non-metals are generally not soft and cannot be cut with a knife.
Very reactive to air and cannot be kept open in air:


This property indicates that the element reacts with oxygen in the air and forms a compound. Metals that are highly reactive with air include sodium (Na) and potassium (K).
Reacts vigorously with water:


This property suggests that the element is an alkali metal, as alkali metals are highly reactive with water. The alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Comparing the properties with the options:


- Option A: Magnesium (Mg) is a metal, but it is not highly reactive with air and does not react vigorously with water. Therefore, it is not the correct answer.
- Option B: Sodium (Na) is a metal, highly reactive with air, and reacts vigorously with water. This matches all the given properties, so it is the correct answer.
- Option C: Phosphorus (P) is a non-metal and not soft, so it does not match the given properties. Therefore, it is not the correct answer.
- Option D: Calcium (Ca) is a metal, but it is not highly reactive with air and does not react vigorously with water. Therefore, it is not the correct answer.
Conclusion:


Based on the given properties, the element that matches all the given criteria is Sodium (Na). Therefore, option B is the correct answer.
Physical Properties Of Metals -2 - Question 17
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Electrical wires have a coating of an insulating material. The material, generally used is
Detailed Solution for Physical Properties Of Metals -2 - Question 17

PVC is an abbreviated form of polyvinyl chloride. The electrical characteristics of PVC such as electrical insulating properties or dielectric constant are excellent and hence, are used as insulating materials.

Physical Properties Of Metals -2 - Question 18
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An electrolytic cell consists of
(i) positively charged cathode
(ii) negatively charged anode
(iii) positively charged anode
(iv) negatively charged cathode
Detailed Solution for Physical Properties Of Metals -2 - Question 18
Answer:
The correct answer is option B: (iii) and (iv) - negatively charged anode and positively charged cathode.
Explanation:
An electrolytic cell is a type of electrochemical cell where an electric current is used to drive a non-spontaneous chemical reaction. In this cell, electrical energy is converted into chemical energy.
In an electrolytic cell, the following conditions are true:
(i) The cathode is positively charged: The cathode is the electrode where reduction occurs. Reduction involves the gain of electrons, so the cathode is negatively charged.
(ii) The anode is negatively charged: The anode is the electrode where oxidation occurs. Oxidation involves the loss of electrons, so the anode is positively charged.
(iii) The anode is positively charged: This statement is incorrect. The anode is always negatively charged in an electrolytic cell.
(iv) The cathode is negatively charged: This statement is incorrect. The cathode is always positively charged in an electrolytic cell.
Hence, the correct answer is option B: (iii) and (iv) - negatively charged anode and positively charged cathode.
Physical Properties Of Metals -2 - Question 19
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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) ?
Detailed Solution for Physical Properties Of Metals -2 - Question 19

Metals (except Mn and Mg) do not give hydrogen gas with nitric acid.

Physical Properties Of Metals -2 - Question 20
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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 occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
Detailed Solution for Physical Properties Of Metals -2 - Question 20

The reaction between a metal and an acid can be used to determine the reactivity of the metal. In this case, we have three test tubes, each containing a different acid and a small piece of metal. Let's analyze the observations and determine the metal.
Observations:
- No change occurred in test tube A (concentrated HCl)
- No change occurred in test tube B (HNO3)
- The metal got dissolved in test tube C (mixture of concentrated HCl and concentrated HNO3 in the ratio of 3:1)
Reasoning:
- The lack of reaction in test tubes A and B indicates that the metal is not reactive enough to react with HCl or HNO3 alone.
- The metal getting dissolved in test tube C suggests that the mixture of HCl and HNO3 is able to react with the metal.
Analysis:
- Based on the given options, we need to determine which metal is not reactive enough to react with HCl or HNO3 alone but can react with a mixture of the two acids.
Let's analyze the reactivity of the metals in the given options:
A: Al (Aluminum)
- Aluminum is not reactive enough to react with HCl or HNO3 alone.
- Aluminum would not dissolve in the mixture of HCl and HNO3 as well.
- Therefore, the metal in test tube C cannot be Aluminum.
B: Au (Gold)
- Gold is not reactive enough to react with HCl or HNO3 alone.
- Gold would not dissolve in the mixture of HCl and HNO3 as well.
- Therefore, the metal in test tube C cannot be Gold.
C: Cu (Copper)
- Copper is not reactive enough to react with HCl alone.
- Copper is not reactive enough to react with HNO3 alone.
- However, Copper can react with a mixture of HCl and HNO3 to form Copper(II) chloride and Nitric oxide gas.
- Therefore, the metal in test tube C is most likely Copper.
D: Ag (Silver)
- Silver is not reactive enough to react with HCl alone.
- Silver is not reactive enough to react with HNO3 alone.
- Silver does not readily react with a mixture of HCl and HNO3.
- Therefore, the metal in test tube C cannot be Silver.
Conclusion:
Based on the observations and analysis, the metal in test tube C is most likely Copper (Cu). Therefore, the correct answer is option C.
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