CBSE Questions for Class 8 Chemistry Materials Metals And Non Metals Quiz 3 - MCQExams.com

On strong heating, zinc metal burns in presence of air to form :
  • zinc chloride
  • zinc sulphide
  • zinc oxide
  • zinc hydroxide
Identify the amphoteric oxide.
  • Aluminium oxide
  • Iron oxide
  • Copper oxide
  • Magnesium oxide
Metal is 
  • Good conductor of electricity.
  • Bad conductor of electricity.
  • A & B both
  • None of these
What is the nature of the following reaction?
$$Cu + HCl \rightarrow$$
  • Reacts vigorously
  • No reaction
  • Reacts modestly
  • Reacts slowly
Acid reacts with metal to form:
  • salt + $$CO_2$$
  • salt + water
  • salt + $$O_2$$
  • salt + $$H_2$$
What type of oxides is formed when non-metals combine with oxygen?
  • Acidic oxides
  • Basic oxide
  • Neutral oxide
  • Both A and B
Curd and sour substances should not be kept in brass and copper vessels.
  • True
  • False
When Amrita was asked to pick up a few articles from a collection, she picked up the following:
Wooden scale, glass test tube and paper basket.
Which article is she most likely to pick up next?
  • Steel cup
  • Iron chain
  • Rubber gloves
  • Copper wire
Which of the following metal/non metal is stored in water?
  • Sodium
  • Mercury
  • Oxygen
  • Phosphorous
Which of the following is a property of non-metal?
  • Low densities
  • Low melting points
  • Poor conductor of electricity
  • All of the above
Non-metals + acids $$\rightarrow$$
  • slow reaction
  • violent reaction
  • moderate reaction
  • no reaction
The metal which does not react with air is:
  • sodium
  • calcium
  • gold
  • aluminum
Sodium metal can be stored under:
  • benzene
  • kerosene
  • alcohol
  • water
Most of the metals combine with acids: 
  • to produce carbon dioxide gas
  • to form a base
  • to liberate hydrogen gas by displacing hydrogen from the acids
  • to form acidic salt
The non-metal that has a metallic lustre and sublimes on heating is_______.
  • Iodine
  • Oxygen
  • Fluorine
  • Carbon
Which of the following non-metals is yellow in colour?
  • Sulphur
  • Iodine
  • Phosphorus
  • None of the above
Metal which gives out sound when struck are called ________.
  • ductile
  • sonorous
  • malleable
  • All of these
Which of the following reactions cannot occur?
  • $$Fe\, +\, CuSO_4\, \rightarrow FeSO_4\, +\, Cu$$
  • $$Zn\, +\, FeSO_4\, \rightarrow FeSO_4\, +\, Fe$$
  • $$Fe\, +\, ZnSO_4\, \rightarrow FeSO_4\, +\, Zn$$
  • Both (A) and (B)
Sulphur dioxide $$\displaystyle \left ( SO_{2} \right )$$ is a/an:
  • acidic oxide
  • basic oxide
  • neutral oxide
  • none of the above
When zinc reacts with dilute $$NaOH,$$ the products formed are:
  • $$H_2+Zn(OH)_2+Na$$
  • $$H_2+ZnO+Na$$
  • $$H_2+Na_2ZnO_2$$
  • $$NaOH+H_2+ZnO$$
The metal generally mixed with gold while making ornaments is:
  • zinc
  • iron
  • silver
  • copper
A very reactive non-metal which does not occur in nature in the free state and is present in the bones, teeth and nervous tissue of animals is:
  • nitrogen
  • chlorine
  • phosphorus
  • sulphur
Quick silver is now known as:
  • lead
  • mercury
  • tin
  • brass
Choose the reactions which are not feasible.
I. Iron + Zinc sulphate $$\rightarrow$$ Iron sulphate + Zinc
II. Magnesium + Silver nitrate $$\rightarrow$$ Magnesium nitrate + Silver
III. Copper + dil. sulphuric acid $$\rightarrow$$ Copper sulphate + $$H_2$$
IV. Zinc + Ferrous sulphate $$\rightarrow$$ Iron + Zinc sulphate
  • I, II and III
  • III and IV only
  • I and III only
  • All of these
Which of the following metals generally occur in liquid a state at room temperature?
  • Mercury
  • Iron
  • Gallium
  • Both A and C 
The non-metal which is liquid at room temperature is:
  • chlorine
  • fluorine
  • bromine
  • iodine
When a little sulphur in a spoon is heated, it burns with a blue flame which slowly disappears after some time and we can feel a pungent odour. This pungent odour is due to:
  • carbon dioxide
  • sulphur dioxide
  • sulphur gas
  • sulphuric acid
Which element is an important component of transistors?
  • sodium
  • copper
  • germanium
  • radium
The red or orange coating that forms on the surface of iron when exposed to air and moisture for some time is called:
  • Galvanisation
  • Electroplating
  • Rust
  • Reduction
Graphite is a ______ conductor of electricity whereas diamond is a ______ conductor of electricity.
  • bad, bad
  • good, bad
  • bad, good
  • good, good
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