Full fledge assessment videos for metals-and-non-metals

Full fledge assessment (Please watch the above videos before attempting this assessment)

Question 1 of 20
Q1. Which of the following metals can force hydrogen to form hydride? 
  • Sodium
  • Potassium
  • Calcium
  • All of these

Solution :

Sodium, potassium and calcium can force hydrogen to form hydride. 
Still have doubt? Watch Video
Q2. Which metal does not react with steam? 
  • Lead
  • Copper
  • Silver
  • All of the above

Solution :

Lead, copper and silver are metals which do not react with steam. 
Still have doubt? Watch Video
Q3. Which of the following metals does not burn on heating? 
  • Sodium
  • Magnesium
  • Iron
  • Calcium

Solution :

Iron does not burn on heating.
Still have doubt? Watch Video
Q4. Which metal does not show the property of hardness? 
  • Aluminium
  • Iron
  • Sodium
  • Zinc

Solution :

Sodium is a soft metal; it can be cut with a knife. 
Still have doubt? Watch Video
Q5. Oxides of zinc are ……….. 
  • Acidic
  • Basic
  • Neutral
  • Amphoteric

Solution :

Oxides of zinc are amphoteric in nature; their oxides show both acidic and basic properties. 
Still have doubt? Watch Video
Q6. Corrosion invoives
  • Physical change
  • Chemical change
  • Both
  • None

Solution :

The process of corrosion involves both physical and chemical change.
Still have doubt? Watch Video
Q7. Which of the following is the first step in the extraction of metals? 
  • Enrichment of ore
  • Reduction of ore
  • Roasting of ore
  • Refining of ore

Solution :

Enrichment of ore is the first step in the extraction of metals. 
Still have doubt? Watch Video
Q8. The atom of an element differs from its ion in 
  • Nuclear charge
  • Mass number
  • Number of electrons
  • Number of protons

Solution :

The atom of an element differs from its ion in the number of electrons. 
Still have doubt? Watch Video
Q9. Which of the following alloys is used for dental cleaning? 
  • Magnalium
  • Amalgam
  • Duralumin
  • German silver

Solution :

Amalgam is used for dental cleaning. 
Still have doubt? Watch Video
Q10. Which allotrope of carbon is the hardest substance known? 
  • Diamond
  • Graphite
  • Coke
  • Fullerene

Solution :

Diamond is the hardest substance known. 
Still have doubt? Watch Video
Q11. The alloy of iron is called stainless steel because of which one property? 
  • High strength
  • Brittleness
  • High malleability
  • High corrosion resistance

Solution :

The alloy of iron is called stainless steel because of its high corrosion resistance. 
Still have doubt? Watch Video
Q12. K  Potassium Na  Sodium Ca Calcium Mg  Magnesium Al  Aluminium Zn  Zinc Fe  Iron Pb  Lead H  Hydrogen Cu  Copper Hg  Mercury Ag  Silver Au  Gold In the given activity series of metals, metals placed at the top are
  • Most reactive
  • Least reactive
  • Moderately reactive
  • Unreactive

Solution :

In the given activity series of metals, metals placed at the top are most reactive. 
Still have doubt? Watch Video
Q13. Magnesium ion is 
  • Monovalent
  • Divalent
  • Trivalent
  • Tetravalent

Solution :

Magnesium ion is divalent. 
Still have doubt? Watch Video
Q14. Rusting of iron is catalysed by which one of the following? 
  • Iron
  • Zinc
  • H+
  • O2

Solution :

Rusting of iron is catalysed by the presence of H+ ions. 
Still have doubt? Watch Video
Q15. Which one of these metals exists in its free state in nature? 
  • Gold
  • Magnesium
  • Lead
  • Copper

Solution :

Gold exists in its free state in nature. 
Still have doubt? Watch Video
Q16. Which metal will react with acid by heating only? 
  • Sodium
  • Copper
  • Magnesium
  • Zinc

Solution :

Only copper will react with acid by heating. 
Still have doubt? Watch Video
Q17. Which of the following species is not formed by the transfer of electrons? 
  • H(Hydride)
  • H+ (Hydrogen ion)
  • H· (Hydrogen radical)
  • H2 (Hydrogen molecule)

Solution :

H2. Hydrogen molecule is a covalent compound formed by the sharing of electrons. 
Still have doubt? Watch Video
Q18. Which metal possesses the highest melting point? 
  • Aluminium
  • Iron
  • Tungsten
  • Zinc

Solution :

Tungsten has the highest melting point. 
Still have doubt? Watch Video
Q19. Non-metallic oxides present in the atmosphere are dissolved in rainwater and cause 
  • Global warming
  • Acid rain
  • Air pollution
  • All of these

Solution :

Non-metallic oxides present in the atmosphere are dissolved in rainwater and cause acid rain. 
Still have doubt? Watch Video
Q20. Which of the following is used to extract metal which is economically profitable? 
  • Minerals
  • Flux
  • Ore
  • Slag

Solution :

Ore is used to extract metal which is economically profitable. 
Still have doubt? Watch Video