Chapter 4 - Materials: Metals and Non-Metals MCQs
Question 1: Out of the 92 naturally occurring elements ________ are metals and about ________ are non-metals.
a) 70, 22
b) 69, 23
c) 58, 34
d) All of these
Answer
Answer: a) 70, 22
Question 2:Find the odd one out on basis of Metals and Non-Metals.
a) Gold
b) Silver
c) Neon
d) Platinum
Answer
Answer: c) Neon
Question 3: Some elements show properties of both metals and non-metals. They are called ________________.
a) Non-Metal
b) Metals
c) Metallurgy
d) Metalloids
Answer
Answer: d) Metalloids
Question 4:Which of the following non-metal are found in free and combined states?
a) Sulphur
b) Phosphorus
c) Helium
d) Both a) and b)
Answer
Answer: d) Both a) and b)
Question 5: _________________ is science of extraction of metals from their ores and their purification.
a) Pedology
b) Petrology
c) Metallurgy
d) Anthropology
Answer
Answer: c) Metallurgy
Question 6: _______________ are naturally occurring substances containing one or more elements or their compounds.
a) Metals
b) Non-metals
c) Minerals
d) Petro-chemicals
Answer
Answer: c) Minerals
Question 7: ____________ is a mineral from which one or more metals can be extracted profitably.
a) Ore
b) Crude
c) Rocks
d) All of these
Answer
Answer: a) Ore
Question 8: Metallurgical processes consists of three main steps. Which of the following is not the metallurgical processes?
a) Concentration of the ore
b) Reduction
c) Refining
d) Pulverization
Answer
Answer: d) Pulverization
Question 9: Find the incorrect statement.
i) Non-metals do not have lustre, some have a dull lustre.
ii) Non-metals have low melting points.
iii) Metals are sonorous (produces sound).
iv) Metals are ductile (can be made into thin wires).
a) i), ii), iii)
b) i), iv)
c) iii), ii)
d) None of these
Answer
Answer: d) None of these
Question 10: Magnesium + Oxygen =
a) Magnesium Oxide
b) Magnesium Hydroxide
c) Magnesium phosphate
d) No reaction
Answer
Answer: a) Magnesium Oxide
Question 11: Which of the options in the given table are correct?
i) Orange - Oxalic acid
ii) Sour milk - Lactic acid
iii) Ant sting - Methanoic acid
iv) Tamarind - Acetic acid
a) i) and ii)
b) i) and iv)
c) ii) and iii)
d) ii) and iv)
Answer
Answer: c) ii) and iii)
Question 12: From the given options, choose the element which is not malleable.
a) Zinc
b) Phosphorus
c) Sulphur
d) Oxygen
Answer
Answer: a) Zinc
Question 13: Non-metals react with oxygen to form non-metallic oxides.
a) True
b) False
c) Maybe
d) None of these
Answer
Answer: a) True
Question 14: Sulphur burns in air to form _____________________.
a) sulphur dioxide
b) sulphurous acid
c) sulphur monoxide
d) All of the above
Answer
Answer: a) sulphur dioxide
Question 15: Metals react with water to form _________________ and ________________.
a) acids, hydrogen
b) bases, metal hydroxides
c) metal hydroxides, hydrogen
d) None of these
Answer
Answer: c) metal hydroxides, hydrogen
Question 16: The metal oxides that react with both acids and bases to produce the respective salts and water are known as
a) Metal hydroxide
b) Amphoteric hydroxide
c) Amphoteric oxide
d) All of these
Answer
Answer: c) Amphoteric oxide
Question 17: Which of the following is most metal?
a) Platinum
b) Tin
c) Lead
d) Hydrogen
Answer
Answer: b) Tin
Question 18: Find the odd one out on the basis of metals and non-metals.
a) Zinc
b) Aluminium
c) Tin
d) Rubber
Answer
Answer: d) Rubber
Question 19: Metals like gold, silver, platinum, etc. don't lose their lustre as they do not react with air, water, and acids. So they are non-metals.
a) True
b) False
c) Maybe
d) None of these
Answer
Answer: b) False
Question 20: Aqua regia is a mixture of _________________ and ___________________ in the ratio 1:3.
a) concentrated nitric acid, concentrated hydrochloric acid
b) concentrated hydrochloric acid, concentrated nitric acid
c) concentrated hydroiodic acid, concentrated nitric acid
d) concentrated hydrochloric acid, concentrated hydroiodic acid
Answer
Answer: a) concentrated nitric acid, concentrated hydrochloric acid
Question 21: Which of the following is not an alloy?
a) Duralumin
b) Brass
c) Nickel
d) Alnico
Answer
Answer: c) Nickel
Question 22: Which of the following methods can be used to prevent corrosion?
a) Applying grease
b) Electroplating
c) Galvanisation
d) All of these
Answer
Answer: d) All of these
Question 23: The _____________ is defined as the point at which materials changes from a solid to a liquid.
a) boiling point
b) heating point
c) melting point
d) None of these
Answer
Answer: c) melting point
Question 24: Why is sodium stored in kerosene?
a) It reacts with water only.
b) It reacts with oxygen only.
c) It reacts with water and oxygen only.
d) It reacts with mild acids.
Answer
Answer: c) It reacts with water and oxygen only.
Question 25: ___________ contain iron as base metal.
a) Non-Ferrous alloys
b) Ferrous alloys
c) Double displacement reaction
d) Displacement reaction
Answer
Answer: b) Ferrous alloys
Question 26: The substance that will be flattened on beating with a hammer is
a) crystal of iodine
b) lump of sulphur
c) piece of coal
d) zinc granule
Answer
Answer: d) zinc granule
Question 27: Arrange the following metals in arranging order of their reactivity series.
i) Calcium
ii) Gold
iii) Magnesium
iv) Potassium
a) i), iii), iv), ii)
b) iv), i), iii), ii)
c) iv), i), ii), iii)
d) ii), iii), iv), i)
Answer
Answer: b) iv), i), iii), ii)
Question 28: Non-metals are
a) generally gases
b) generally liquids
c) generally solids
d) generally solid, liquids and gases
Answer
Answer: d) generally solid, liquids and gases
Question 29: The metal which is liquid at room temperature is ___________________.
a) Sodium
b) Silver
c) Calcium
d) Mercury
Answer
Answer: d) Mercury
Question 30: Which of the following is not an alloy?
a) Duralumin
b) Stainless steel
c) Silver
d) Alnico
Answer
Answer: c) Silver
Question 31: Which is the hardest non-metal?
a) Gold
b) Diamond
c) Aluminium
d) None of these
Answer
Answer: b) Diamond
Question 32: Metals react with acids to produce respective salts with evolution of
a) hydrogen gas
b) oxygen gas
c) carbon dioxide gas
d) sulphur dioxide gas
Answer
Answer: a) hydrogen gas
Question 33: Which one of the following is a metal?
a) C
b) N
c) Na
d) O
Answer
Answer: c) Na
Question 34: What is the chemical formula of sulphurous acid?
a) H₂SO₄
b) SO₂
c) SO₃
d) H₂SO₃
Answer
Answer: d) H₂SO₃
Question 35: Which of the following order is correct for the reactivity of metals?
a) Na > Au > Fe > Mg
b) Na > Mg > Fe > Au
c) Mg > Fe > Na > Au
d) Mg > Na > Fe > Au
Answer
Answer: b) Na > Mg > Fe > Au
Question 36: Soluble bases are called
a) Alkalis
b) Metals
c) Non-metals
d) Amphoteric metals
Answer
Answer: a) Alkalis
Question 37:
Assertion (A): Platinum, gold and silver are used to make jewellery.
Reason (R): Platinum, silver and gold are least reactive metals.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Answer
Answer: b) Both A and R are true but R is not the correct explanation of A.
Question 38:
Assertion (A): Metals are sonorous.
Reason (R): They break into pieces when they are hammered.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Answer
Answer: c) A is true but R is false.
Question 39:
Assertion (A): Highly reactive metals don’t replace less reactive metals.
Reason (R): The most reactive metal is potassium.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Answer
Answer: d) A is false but R is true.
Question 40:
Assertion (A): Metals react with oxygen to form metallic oxides, which is basic in nature.
Reason (R): These oxides are basic in nature, because they react with water to form bases.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Answer
Answer: a) Both A and R are true and R is the correct explanation of A.
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