All elements found on Earth have been appropriately ordered in a periodic table based on their increasing atomic numbers. There are 118 known elements, 92 of which are derived naturally and the remaining 26 are created artificially in laboratories. These elements are classified into three groups based on their physical and chemical properties: metalloids, metals, and non-metals.
Metals are elements that are typically hard due to a strong metallic bond between the atoms. Nonmetals, on the other hand, are frequently brittle components. Metals are elements with one, two, or three electrons in the valence shell. Non-metals are elements containing 4, 5, 6, or 7 electrons in their outermost shell.
Download PDF of Class 10 Chemistry Worksheet Chapter 3 Metals and Non-metals – Set 1
CBSE Class 10 Chemistry Worksheet Chapter 3 Metals and Non-metals – Set 1
Q1. Which of the following metal will react with dilute nitric acid to produce hydrogen gas.
a.) Mg
b.) Zn
c.) Al
d.) Sn
Q2. Which of the following metal does not react with dilute HCl-
a.) Al
b.) Cu
c.) Zn
d.) Fe
Q3. The atomic number of an element X is 19. The number of electrons in its ion X+ will be:
a.) 18
b.) 19
c.) 20
d.) 21
Q4. Which of the following is an iron ore?
a.) Cinnabar
b.) Calamine
c.) Haematite
d.) Rock salt
Q5. Which of the following four metals would be displaced from the solution of its salt by the other three metals?
a.) Zn
b.) Ag
c.) Cu
d.) Mg
Q6. Name two elements that are stored in kerosene. Explain why?
Q7. Explain galvanisation.
Q8. Why copper is used to making hot water tanks but not steel?
Q9. Name two metals which occur in nature in free state as well as in combined state.
Q10. How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why the same process cannot be applied for them? Explain giving extraction of sodium.
Q11. A substance X which is an oxide of a metal is used intensively in the cement industry. This substance is present in bones also. On treatment with water, it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved.
Q12. Differentiate between roasting and calcination.
Q13. Show the formation of Na2O and MgO by the transfer of electrons.
Q14. a.) Carbon cannot be used as reducing agent to obtain Mg from MgO. Why?
b.) How is sodium obtained from molten sodium chloride? Give equation of the reactions.
c.) How is copper obtained from its sulphide ore? Give equations of the reactions.
Q15. Explain the following by giving examples.
a.) How do metal oxides react with acids?
b.) How do non-metal oxides react with the base?
Q16. Compound X and aluminium are used to join railway tracks.
a.) Identify the compound X.
b.) Name the reaction
c.) Write the equation of the reaction.
Q17. a.) Give a brief explanation of the electrolytic refining of impure copper with a labelled diagram.
b.) Name two alloys prepared from copper and write their uses.
Q18. Give reasons:
a.) White phosphorus is kept immersed in water.
b.) School bells are made up of metals.
c.) Electric wires are made up of copper.
d.) Calcium metal after reacting with water starts floating on its surface.
Q19. Define the following terms:
a.) Mineral
b.) Ores
c.) Gangue
d.) Refining of metals
Q20. Answer the following:
a.) Hydrogen is not a metal but still has been assigned a place in the reactivity series of metals. Why?
b.) Name the gas in the air that tarnishes silver articles slowly.
c.) Why do gold ornaments look new even after several years of use?
d.) How many carats are in pure gold? Why is pure gold not suitable for making ornaments.
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