mcq questions for class 8 science chapter 4
MCQ Questions for Class 8 Science Chapter 4 Materials: Metals and Non-Metals with Answers
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Class 8 Science Chapter 4 Mcq Online Test
1. The most reactive metal is___________
(a) copper
(b) zinc
(c) potassium
(d) gold
Answer: (c)
2. Non-metals are_____________
(a) generally gases
(b) generally liquids
(c) generally solids
(d) generally solid and gases
Answer: (d)
3. Metals are___________
(a) shiny
(b) hard
(c) sonorous
(d) all of these
Answer: (d)
4. Non-metals are___________
(a) non-ductile
(b) non-sonorous
(c) non-malleable
(d) all of these
Answer: (d)
5. The non-metal which is liquid at room temperature is____________
(a) bromine
(b) chlorine
(c) iodine
(d) carbon
Answer: (a)
6. Which substance is used for making pencil lead?
(a) Sulphur
(b) Silicon
(c) Graphite
(d) Aluminium
Answer: (c)
7. Which of the following metals are soft enough to be even cut with a knife?
(a) Sodium
(b) Potassium
(c) Lithium
(d) All of these
Answer: (d)
8. Which one of the following metals is the most reactive and stored in kerosene?
(a) Iron
(b) Gold
(c) Copper
(d) Potassium
Answer: (d)
9. The metal which is not corroded by air, water and acid is____________
(a) copper
(b) zinc
(c) aluminium
(d) gold
Answer: (d)
10. Which metal reacts readily with cold water?
(a) Gold
(b) Silver
(c) Magnesium
(d) Calcium
Answer: (d)
11. Iron is galvanised by coating it with____________
(a) chromium
(b) sodium
(c) magnesium
(d) zinc
Answer: (d)
12. A mineral from which. a metal can be extracted on the commercial scale, economically is called_________
(a) ore
(b) metalloid
(e) corrosion
(d) metal
Answer: (a)
13. Which of the following metals does not react even with steam.?
(a) Silver
(b) Iron
(c) Calcium
(d) Sodium
Answer: (a)
14. Identify the non-metal which exists in a liquid state in room temperature 25∘C.
(a) Aluminium
(b) Mercury
(c) Iodine
(d) Bromine
Answer: (d)
15. A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called a/an ________ reaction.
(a) combination
(b) displacement
(c) double displacement
(d) addition
Answer: (b)
16. Metals, except Al and Zn, react with oxygen to form _______ oxides.
(a) acidic
(b) neutral
(c) amphoteric
(d) basic
Answer: (d)
17. When sulphur reacts with oxygen, the oxide formed is ___ in nature.
(a) alkaline
(b) neutral
(c) basic
(d) acidic
Answer: (d)
18. Metals like zinc and aluminium react with sodium hydroxide to produce ____ gas.
(a) hydrogen
(b) hydrogen sulphide
(c) Oxygen
(d) sulphur dioxide
Answer: (a)
19. Which is Following Statements are Correct One?
(a) Potassium is the most reactive metal as it placed top of the reactivity series.
(b) Gold is the least reactive metals as it placed bottom of the reactivity series.
(c) Sodium Hydroxide non-metal react with base but no hydrogen gas in produced.
(d) All the above.
Answer: (d)
20. Metals Generally React With Dilute Acids To Produce Hydrogen Gas. Which Of The Following Metals Does Not React With Dilute Hydrochloric Acid_______________
(a) Magnesium
(b) Aluminum
(c) Iron
(d) Copper
Answer: (d)
21. Phosphorus is stored in___________
(a) water
(b) Kept under open air
(c) alcohol
(d) Kerosene
Answer: (a)
22. A substance which cannot be broken down further by chemical reactions, by cooling, heating, or by electrolysis, is called ______
(a) Metal
(b) Non-metal
(c) Element
(d) Compound
Answer: (c)
23. Which of the following metals catch fire on reaction with air?
(a) Magnesium
(b) Manganese
(c) Potassium
(d) Calcium
Answer: (c)
24. The property by which metals can be beaten into sheets is known as _______
(a) ductility
(b) sonority
(c) lustre
(d) malleability
Answer: (d)
25. Pick the odd one from the following elements.
(a) Gold
(b) Potassium
(c) Carbon
(d) Platinum
Answer: (c)
26. What is the property that makes metals shine called?
(a) Malleability
(b) Ductility
(c) Sonorous
(d) Lustre
Answer: (d)