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cbse Class 8 Science Metals and Non-Metals mcq. We covered all the cbse Class 8 Science Metals and Non-Metals mcq in this post for free so that you can practice well for the exam.
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cbse Class 8 Science Metals and Non-Metals mcq for Students
Which of the following elements is a metalloid?
a) Silicon
b) Sodium
c) Oxygen
d) Iron
Option a – Silicon
The black coating that forms on silver jewellery is
a) AgNO₃
b) Ag₂CO₃
c) Ag₂S
d) AgCl
Option c – Ag₂S
Which two properties of Metals are used to make very thin silver sheets for decorating sweets?
a) Ductility and lustre
b) Malleability and sonority
c) Malleability and lustre
d) Lustre and sonority
Option c – Malleability and lustre
Which substance is added to tap water to kill harmful microorganisms and make it safe to drink?
a) Fluoride
b) Iron
c) Chlorine
d) Calcium
Option c – Chlorine
Which of the following are metalloids?
a) Boron, Oxygen, Aluminium
b) Boron, Mercury, Iron
c) Boron, Silicon, Antimony
d) Aluminium, Mercury, Copper
Option c – Boron, Silicon, Antimony
Which alloy is a combination of gold and silver?
a) Constantan
b) Bronze
c) Electrum
d) Solder
Option c – Electrum
Which metal is always a component of an amalgam?
a) Mercury
b) Strontium
c) Aluminium
d) Zinc
Option a – Mercury
Which alloy is made of copper and zinc?
a) Magnalium
b) Monel metal
c) Dutch metal
d) Rolled gold
Option c – Dutch metal
Which of the following statements is correct?
a) Metals react with Acids to produce metal Salts and hydrogen gas.
b) Non-Metals react with oxygen to produce non-metallic oxides that are basic.
c) On burning, Metals react with oxygen to form acidic oxides.
d) Less reactive metals displace more reactive metals in aqueous solutions.
Which of the following statements is/are NOT correct? I. The property of metals that allows them to be beaten into thin sheets is called malleability. II. The property of metals that allows them to be drawn into wires is called ductility.
a) Only II
b) Both I and II
c) Neither I nor II
d) Only I
Option b – Both I and II
Which liquid can dissolve noble metals like gold and platinum?
a) Aqua regia
b) Formic Acid
c) Chloroform
d) Acetic Acid
Option a – Aqua regia
Which of the following statements is incorrect?
a) Metals are used in making cookware.
b) Metals are used in manufacturing automobiles.
c) Living beings inhale metals during Respiration.
d) Metals are used in making jewellery.
Option c – Living beings inhale metals during Respiration.
Choose the most reactive metal from the options given.
a) Zinc
b) Copper
c) Iron
d) Sodium
Option d – Sodium
Which of the following statements is incorrect?
a) Metals react with oxygen to form basic oxides.
b) Non-metals are malleable.
c) Non-metals do not produce sound.
d) Metals have low ionisation enthalpy.
Option b – Non-metals are malleable.
Which metal reacts violently with cold water?
a) Aluminium
b) Magnesium
c) Potassium
d) Zinc
Option c – Potassium
Identify the alloy that contains lead as a component.
a) Solder
b) Alnico
c) Constantan
d) Nickel
Option a – Solder
Which one of the following features is NOT shown by metals?
a) Can be pounded into shape
b) Looks dull
c) Conducts Heat
d) Can be drawn into a wire
Option b – Looks dull
Name the only metal that is antibacterial.
a) Sodium
b) Copper
c) Aluminium
d) Iron
Option b – Copper
Constantan is an alloy of copper and
a) Tin
b) Aluminium
c) Nickel
d) Iron
Option c – Nickel
Which statement correctly describes anodizing?
a) It provides aluminium with protection against corrosion.
b) Metals such as aluminium, titanium, and magnesium can undergo anodizing.
c) During the process, clean aluminium acts as the anode and oxygen gas is released at the cathode.
d) It is widely applied in the aircraft industry.
Option c – During the process, clean aluminium acts as the anode and oxygen gas is released at the cathode.
In the reaction between Fe₂O₃ and aluminium, which points are accurate? 1. The reaction is known as the thermite process. 2. The Heat produced is used for welding. 3. Aluminium works as an oxidizing agent. 4. The final products include molten iron and aluminium.
a) 1 and 2
b) 1 and 3
c) 1 and 4
d) 2 and 4
Option a – 1 and 2
Identify the amphoteric oxide.
a) MgO
b) P₂O₁₀
c) Al₂O₃
d) Na₂O
Option c – Al₂O₃
Which of these metals is not stored under oil?
a) Sodium
b) Rubidium
c) Potassium
d) Lithium
Option d – Lithium
Which metal is added to gold to increase the durability of jewellery?
a) Manganese
b) Mica
c) Aluminium
d) Copper
Option d – Copper
Which statement about a metal reacting with nitric Acid is false?
a) Nitric Acid behaves as an oxidizing agent.
b) The hydrogen generated converts to water.
c) Nitrogen gas is always the end product.
d) Magnesium reacts with very dilute nitric Acid to release hydrogen gas.
Option c – Nitrogen gas is always the end product.
During electrolytic refining of copper, the electrolyte is a solution of
a) Acidified copper sulphate
b) Acidified copper chloride
c) Sodium sulphate
d) Potassium chloride
Option a – Acidified copper sulphate
Which pair remains liquid at room temperature and normal pressure?
a) Gallium and Bromine
b) Mercury and Bromine
c) Gallium and Caesium
d) Gallium and Mercury
Option b – Mercury and Bromine
To protect steel and iron from rust, a thin layer of which metal is applied?
a) Magnesium
b) Zinc
c) Lead
d) Aluminium
Option b – Zinc
Which metal can float on cold water?
a) Magnesium
b) Calcium
c) Potassium
d) Copper
Option b – Calcium
Silver artefacts tarnish in air because of the formation of
a) Silver oxide
b) Silver chloride
c) Silver sulphate
d) Silver sulphide
Option d – Silver sulphide
Bronze is composed of
a) Copper and Zinc
b) Copper and Tin
c) Iron and Copper
d) Zinc and Magnesium
Option b – Copper and Tin
Arrange these metals in descending order of reactivity.
a) Sodium, Iron, Copper, Silver
b) Silver, Copper, Iron, Sodium
c) Iron, Sodium, Silver, Copper
d) Sodium, Copper, Silver, Iron
Option a – Sodium, Iron, Copper, Silver
Which alloy contains a non-metal as a component?
a) Brass
b) Bronze
c) Amalgam
d) Steel
Option d – Steel
Which metal does not liberate hydrogen when reacting with cold water?
a) Potassium
b) Iron
c) Calcium
d) Sodium
Option b – Iron
Galvanization is a process of protecting iron by coating it with
a) Aluminium
b) Gallium
c) Zinc
d) Silver
Option c – Zinc
In the reaction 2Fe + Al₂O₃ → Fe₂O₃ + 2Al, which statement is incorrect?
a) It is an example of a displacement reaction.
b) It is a highly endothermic reaction.
c) Fe₂O₃ functions as an oxidizing agent.
d) The reaction is used for welding Railway tracks.
Option b – It is a highly endothermic reaction.
Which metal is not a necessary component of stainless steel?
a) Iron
b) Nickel
c) Chromium
d) Tin
Option d – Tin
Which metal can be obtained using carbon as the reducing agent?
a) Zinc
b) Silver
c) Aluminium
d) Gold
Option a – Zinc
Which statement about gold is inaccurate?
a) 24-karat gold is very soft.
b) 22-karat gold is commonly used for making ornaments.
c) 22-karat gold contains 22 parts pure gold and 2 parts iron for hardness.
d) 18-karat gold has 75% gold mixed with 25% copper or silver for strength.
Option c – 22-karat gold contains 22 parts pure gold and 2 parts iron for hardness.
Why does the reaction between calcium and sulphuric Acid stop after a short time?
a) The reaction is not feasible at room temperature.
b) An insoluble layer of calcium sulphate forms on the metal, preventing further reaction.
a) Calcium sulphate combines with two water molecules to form crystalline gypsum.
b) Calcium sulphate formed in the reaction is not stable.
Option b – An insoluble layer of calcium sulphate forms on the metal, preventing further reaction.
Which of these oxides possesses the greatest melting point?
a) Sodium oxide
b) Magnesium oxide
c) Ferric oxide
d) Copper(II) oxide
Option b – Magnesium oxide
Why is it safer to use a wooden spoon in a hot pan rather than a metal one?
a) Wood conducts Heat well and aids cooking.
b) Wood adds extra flavour to the Food.
c) Wood is a poor conductor of Heat and stays cool.
d) Wood speeds up the cooking process.
Option c – Wood is a poor conductor of Heat and stays cool.
Choose the correct statement about metallic character. ( cbse Class 8 Science Metals and Non-metals mcq )
a) It decreases across a group and remains unchanged down a group.
b) It decreases across a period and increases down a group.
c) It increases across a period and decreases down a group.
d) It remains unchanged across both a period and a group.
Option b – It decreases across a period and increases down a group.
Who first developed the technique in 1835 of coating one side of glass with a thin silver layer to create mirrors? ( cbse Class 8 Science Metals and Non-metals mcq )
a) Justus von Liebig
b) C. V. Raman
c) Victor Francis Hess
d) C. H. Townes
Option a – Justus von Liebig
Which metal changes from liquid to gas at a boiling point of 357 °C? ( cbse Class 8 Science Metals and Non-metals mcq )
a) Mercury
b) Copper
c) Bronze
d) Gallium
Option a – Mercury
Which substance can replace mercury in thermometers? ( cbse Class 8 Science Metals and Non-metals mcq )
a) Selenium
b) Arsenic
c) Bromine
d) Galinstan
Option d – Galinstan
Which metal does not react with oxygen, water, or Acids? ( cbse Class 8 Science Metals and Non-metals mcq )
a) Sodium
b) Copper
c) Gold
d) Iron
Option c – Gold
Which metal releases hydrogen when it reacts with cold water? ( cbse Class 8 Science Metals and Non-metals mcq )
a) Silver
b) Sodium
c) Iron
d) Copper
Option b – Sodium
When manganese dioxide is heated with aluminium powder to extract manganese, which statement is correct? ( cbse Class 8 Science Metals and Non-metals mcq )
a) The reaction gives off Heat (exothermic).
b) The reaction absorbs Heat (endothermic).
c) Manganese is obtained as a Solid.
d) Manganese is more reactive than aluminium.
Option a – The reaction gives off Heat (exothermic).
Cinnabar is an ore of which element? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Mercury
b) Zinc
c) Copper
d) Lead
Option a – Mercury
White gold is an alloy composed of: ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Gold, Nickel, and Palladium
b) Gold, Cobalt, and Palladium
c) Gold, Titanium, and Platinum
d) Gold, Magnesium, and Palladium
Option a – Gold, Nickel, and Palladium
Which element is a lustrous non-metal? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Carbon
b) Silicon
c) Germanium
d) Iodine
Option d – Iodine
Silver items turn black after reacting with which substance? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Sulphur
b) Oxygen
c) Carbon dioxide
d) Phosphorus
Option a – Sulphur
Which metal is stored under kerosene to avoid accidental fire? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Calcium
b) Sodium
c) Vanadium
d) Magnesium
Option b – Sodium
Which metal shows both malleability and ductility? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Sodium
b) Gold
c) Cerium
d) Mercury
Option b – Gold
Exposure of copper to moist carbon dioxide in air forms a green layer of which compound? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Cupric carbonate
b) Cuprous oxide
c) Cupric oxide
d) Copper sulphate
Option a – Cupric carbonate
The process of heating sulphide ores strongly in excess air to form oxides is called: ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Calcination
b) Roasting
c) Smelting
d) Incineration
Option b – Roasting
Solder is an alloy made of: ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Lead and Zinc
b) Lead and Tin
c) Lead and Silicon
d) Lead and Cobalt
Option b – Lead and Tin
Which option shows the correct reactivity order with dilute HCl? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Mg > Al > Zn > Fe
b) Mg < Al < Zn < Fe
c) Mg > Zn > Fe > Al
d) Fe > Mg > Al > Zn
Option a – Mg > Al > Zn > Fe
When non-metals dissolve in water, which is true? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) They form acidic oxides.
b) They form basic oxides.
c) They form neutral oxides.
d) They form hydroxides.
Option a – They form acidic oxides.
Which pair of metals are excellent Heat conductors? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Silver and Copper
b) Silver and Lead
c) Copper and Mercury
d) Lead and Mercury
Option a – Silver and Copper
School bells are made of metals mainly because metals are: ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Malleable
b) Sonorous
c) Ductile
d) Lustrous
Option b – Sonorous
During Railway track joining, iron oxide is made to react with which metal? ( CBSE Class 8 Science Metals and Non-metals MCQ )
a) Aluminium
b) Zinc
c) Copper
d) Tin
Option a – Aluminium
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