RBSE Class 10 Science Chemistry Chapter 3 Metals and Non-Metals MCQs (Objectives) are very important for students preparing for Board Exams. These MCQS have been prepared on the basis of important topics of Metals and Non-Metals
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In this post, you will find high- quality, exam oriented MCQs with answers prepared according to the latest RBSE Class 10 Science syllabus. You can solve these MCQs after reading Quick Revision Notes and also solve the questions of the chapter Metals and Non-Metals.Whether you are a student looking for quick revision or a teacher searching for readymade study material, this post is for you.
Metals and Non-Metals Objectives with Answers
Multiple Choice Questions
Choose
correct answers of following questions
1The most ductile metal is
(a)Aluminium
(b)Silver
(c) Gold
(d)Lead
Correct answer– (b)
Explanation – The ability of metals to be drawn into thin wire is known as ductility. Very thin wires can be drawn from gold.
2The best conductor of heat and electricity is
(a) Aluminium
(b)Gold
(c) Silver
(d)Lead
Correct answer– (c)
3The poorest conductor of heat is
(a) Aluminium
(b)Silver
(c) Gold
(d)Lead
Correct answer– (d)
4 The best malleable metal is
(a) Aluminium
(b)Silver
(c) Gold
(d)Lead
Correct answer– (c)
Explanation – the ability of metals to be beaten into thin sheets is known as malleability. Very thin sheets can be made from gold.
5The most abundant metal in the earth’s crust is
(a) Iron
(b)Copper
(c) Aluminium
(d)Mercury
Correct answer– (c)
6 The metal which we can cut with a knife is
(a) Sodium
(b)Silver
(c) Gold
(d)Platinum
Correct answer– (a)
Explanation – Sodium by nature is very soft metal so it can be cut with knife.
7 The metal that reacts with cold water is
(a) Mercury
(b)Sodium
(c) Zinc
(d)Tungsten
Correct answer– (b)
8The only metal that is liquid at room temperature is
(a) Mercury
(b)Sodium
(c) Zinc
(d)Tungsten
Correct answer– (a)
9 Which is the correct reactivity series
(a) Na > AI > Ca > K
(b)K > Ba > Ca > Fe > Na
(c) K > Ca > Ba > Fe > Na
(d)K > Ba > Ca > Na > Mg
Correct answer– (d)
10 The process of extraction metal from its ores is known as
(a) Concentration
(b)Calcination
(c) Purification
(d)Metallurgy
Correct answer– (d)
11 Which is not found in free state
(a) Sodium
(b)Silver
(c) Gold
(d)Platinum
Correct answer– (a)
Explanation – Sodium is highly reactive metal so it reacts with other element and forms compound , that’s why it is not found in free state.
12 Naturally occurring metal containing material is called
(a)Slag
(b)Gangue
(c)Ore
(d)Mineral
Correct answer– (d)
13The compound from which metal is extracted economically is
(a)Slag
(b)Gangue
(c) Ore
(d)Mineral
Correct answer– (c)
14 The unwanted substances present with ore are called
(a)Slag
(b)Gangue
(c) Ore
(d)Mineral
Correct answer– (b)
15 Sulphide ore are generally concentrated by
(a)Forth floatation process
(b)Electromagnetic process
(c) Gravity-process
(d)All the above
Correct answer– (a)
16 The process to heat the ore in the presence of limited supply of air below its melting point is called
(a) Roasting
(b)Calcination
(c) Smelting
(d)Liquation
Correct answer– (b)
17 The process of heat the ore in the presence of excess supply of air below its melting point is called
(a) Roasting
(b)Calcination
(c) Smelting
(d)Liquation
Correct answer– (a)
18 Brass is a mixture of
(a) Copper and zinc
(b)Copper and tin
(c) Copper, nickel and zinc
(d)Aluminium, copper and traces of Mg & Mn.
Correct answer– (a)
19 Which metal does not displace hydrogen with dilute sulphuric acid
(a) Zn
(b)Mg
(c) Cu
(d)Fe
Correct answer– (c)
20 Bronze is a mixture of
(a) Copper and zinc
(b)Copper and tin
(c) Copper, nickel and zinc
(d)Aluminium, copper and traces of Mg & Mn.
Correct answer– (b)
21 The number of non-metal known is
(a)32
(b)18
(c) 22
(d)80
Correct answer– (c)
22 The non-metal which is a liquid at room temperature is
(a)Boron
(b)Phosphorus
(c) Sulphur
(d)Bromine
Correct answer– (d)
23The non-metal which is a good conductor of electricity is
(a) Boron
(b)Graphite
(c) Sulphur
(d)Arsenic
Correct answer– (b)
Explanation – Graphite is an allotrope of Carbon and in graphite each carbon has free electron that’s why it is good conductor of electricity.
24 Ferrous ores are separated by
(a) Forth floatation process
(b)Electromagnetic process
(c)Gravity-process
(d)All the above
Correct answer– (b)
25 The process to remove unwanted impurities from the ore is called
(a) Purification
(b)Calcination
(c) Bessemerisation
(d)Concentration
Correct answer– (d)
26 Which is not a property of non-metals
(a) They are usually brittle
(b)They cannot be polished
(c) They donate electrons
(d)They are not good conductors of heat and electricity
Correct answer– (c)
Explanation – Non- metals have tendency to accept electrons and form anions.
27 The electronic configuration of sulphur (atomic
number 16) is
(a) 2, 8, 3
(b)2, 8, 4
(c) 2, 8, 8, 4
(d)2, 8, 6
Correct answer– (d)
28 Most the metals produce sound, because they are
(a) Sonorous
(b) Malleability
(c) Conductivity
(d) Ductility
Correct answer– (a)
29 Amphoteric oxide is
(a) Na2O
(b)BaO
(c) ZnO
(d)K2O
Correct answer– (c)
30 The process of forming a thick layer of oxide on aluminium surface is called.
(a) Anoding
(b) Bessimerisation
(c) Catenation
(d) Galvanisation
Correct answer– (a)
31 Metal that reacts violently with cold water is
(a) Cu
(b)K
(c) Fe
(d)Mg
Correct answer– (b)
32 Metal that reacts with hot water is
(a)Cu
(b)K
(c)Mg
(d)Fe
Correct answer– (c)
33 Metal that react with steam is
(a)Cu
(b)Fe
(c)K
(d)Mg
Correct answer– (b)
34 Metal that does not react with water is
(a)Cu
(b)K
(c)Fe
(d)Mg
Correct answer– (a)
35 The ability of metal to change into thin sheet on hammering, is called
(a)Sonorous
(b)Malleability
(c) Conductivity
(d)Ductility
Correct answer– (b)
36 Metal are drawn into wires, due to the property of
(a) Sonorous
(b)Ductility
(c) Conductivity
(d) Malleability
Correct answer– (b)
37 Aqua regia is a mixture of concentrated
(a) Hydrochloric acid and sulphuric acid
(b)Nitric acid and sulphuric acid
(c) Hydrochloric acid and nitric acid
(d) Nitric acid and acetic acid
Correct answer– (c)
38 The number of electrons in the outermost shell of metals is
(a) 1
(b)2
(c) 2
(d) all the above
Correct answer– (d)
39 Mg (atomic number 12) will lose ………electrons to acquire stable configuration
(a)1
(b)2
(c) 3
(d)4
Correct answer– (b)
Explanation – Electronic configuration of Mg is 1s2,2s2, 2p6,3s2 . Mg loss 2 electrons from its outermost shell (3s) to acquire stable configuration.
40 Pure gold is known as
(a) 20 carat gold
(b)22 carat gold
(c) 24 carat gold
(d)26 carat gold
Correct answer– (c)
41 The property not shown by metals is
(a) Malleability
(b)Sonorous in nature
(c)Conductivity
(d)Dullness
Correct answer– (d)
Explanation – All metals are lustrous in nature. They shines and reflect light.
42 Mostly kitchen vessels are made of aluminium, due to its
(a) Good electrical conductivity
(b)Good thermal conductivity
(c)Malleability
(d)Ductility
Correct answer– (b)
43 The correct statement is, magnesium reacts with
(a) Cold water vigorously
(b)Hot water
(c) With steam
(d) It does not react with water
Correct answer– (b)
44 The correct statement is, iron reacts with
(a) Cold water and form FeO
(b)Hot water and forms Fe2O3
(c) Steam and forms Fe3O4
(d)Iron does not react with water
Correct answer– (c)
45 Metals do not form hydrogen gas reacting with
(a) Hydrochloric acid
(b)Nitric acid
(c) Sulphuric acid
(d)All the above
Correct answer– (b)
46 Which of the following is not an ionic compound? is
(a) NaCI
(b)KCI
(c) H2SO4
(d)CCI4
Correct answer– (d)
Explanation – CCl4 is an organic compound.
47 NaCI is an ionic compound, it is soluble in
(a) Alcohol
(b)Water
(c) Carbon tetrachloride
(d)Di methyl ether
Correct answer– (b)
Explanation –Ionic compound are soluble in Polar solvent like water.
48 Electrolytic reduction is used to obtain metals which are
(a) Low in activity series
(b)Middle of the activity series
(c) High up in the activity series
(d)All the above
Correct answer– (c)
49 The property not shown by ionic compounds, is
(a) High melting and boiling point
(b)Rigid structure and definite shape
(c) Conductivity in solid state
(d)Solubility in water
Correct answer– (c)
50 Which of the following metals are obtained by electrolysis of their chlorides in molten state
(i) Na
(ii)Mg
(iii) Ca
(iv)Cu
(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) (i), (ii) and (iv)
Correct answer– (b)
51 Metal refined by electrolytic process is
(a) Na
(b)Mg
(c) Ca
(d)Cu
Correct answer– (d)
52 Which one of the following four metals would be displaced by other three from its salt solution
(a) Ag
(b)Mg
(c) Hg
(d)Cu
Correct answer– (a)
Explanation – Silver is less reactive than the other three metals.
53 During electrolytic refining of metal, metal
(a) Deposits on cathode
(b) Deposits on anode
(c)Deposits on anode as
well as cathode
(d) Remains in the solution
Correct answer– (a)
Explanation – Metals are electro positive so they deposit on cathode (-ve).
54 In amalgam a metal is dissolved in
(a) Ag
(b)Mg
(c) Hg
(d)Cu
Correct answer– (c)
55 Generally, alloys are homogeneous mixture of a metal with a metal or nonmetal. Which among the following alloys contain non-metal?
(a) Amalgam
(b)Bronze
(c) Steel
(d)Brass
Correct answer– (c)
56 Mostly, non-metals are non-conductors of electricity. Which of the following non-metals is a good conductor of electricity?
(a)Fullerene
(b)Graphite
(c) Sulphur
(d)Diamond
Correct answer– (b)
57 Generally, non-metals are not lustrous. The non-metal having lustre is
(a Oxygen
(b)Bromine
(c) Sulphur
(d)Iodine
Correct answer– (d)
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