Match the column
class8-science-chapter-4-mcq-2.png
  • p -> iii, q -> iv, r -> i , s ->ii
  • p -> i, q -> ii, r -> iv, s ->iii
  • p -> iv, q -> i, r -> ii , s ->iii
  • p -> iii, q -> iv, r -> ii , s ->i
The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is
  • copper
  • sodium
  • iron
  • aluminium
The carbon content is steel is
  • 0.1 to 5%
  • .1 to 1.5%
  • 2.0 to 2.5%
  • < .1 %
A  thick paste of Cement ,Sand and water is called
  • Concrete
  • Mortar
  • Slurry
  • Moderator
Which of the following statement is false?
  • Metals are good conductor of heat and electricity
  • Non-metals are non-sonorous.
  • Non-metals do not react with dilute acids
  • Copper reacts with dilute acids
Which of the following is an iron ore?
  • Haematite
  • Calamine
  • Cinnabar
  • Rock Salt
which of the following is not a metalloids?
  • antimony
  • germanium
  • boron
  • bromine
The substance that will be flattened on beating with a hammer is
  • crystal of iodine
  • lump of sulphur
  • piece of coal
  • zinc granule
which of the following metals will not react with a solution of $CuSO_4$ ?
  • Iron
  • Silver
  • Zinc
  • Magnesium
Match the column
class8-science-chapter-4-mcq-1.png
  • p -> iii, q -> iv, r -> i , s ->ii
  • p -> i, q -> ii, r -> iv, s ->iii
  • p -> iii, q -> i, r -> ii , s ->iv
  • p -> iii, q -> iv, r -> ii , s ->i
Match the column
class8-science-chapter-4-mcq-3.png
  • p -> ii, q -> i, r -> ii , s ->i
  • p -> i, q -> ii, r -> i , s ->ii
  • p -> i, q -> i, r -> ii , s ->ii
  • p -> ii, q -> ii, r -> i , s ->i
which is not the constituent of steel?
  • Iron
  • Zinc
  • Chromium
  • None of these
which is of these is a noble metal
  • Gold
  • Iron
  • Zinc
  • None of the above
Non-metals react with oxygen to form  _____ oxides
  • Basic
  • Acidic
  • Amphoteric
  • None of these
Which of these metals do not react with water or steam.
  • Tin
  • Magnesium
  • Sodium
  • Calcium
which gas is liberated when metal reacts with water
  • Oxygen
  • Hydrogen
  • Nitrogen
  • None of these
which of these is not there ib Duralumin Alloy
  • Al
  • Cu
  • Mn
  • Fe
which of the following reacts with water?
  • copper
  • silver
  • mercury
  • zinc
Which of the following non-metals reacts and catches fire on exposure to air?
  • phosphorus
  • sulphur
  • hydrogen
  • nitrogen
Which of these is false?
  • Metals are excellent conductors of electricity and heat.
  • Articles made of metals produce a ringing sound when struck hard.
  • Sodium is more reactive than magnesium
  • None of the above
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