Metals & Non-Metals - 1 Class 10 Worksheet Science Chapter 3

Q1:  Which one of the following metals does not react with cold as well as hot water?
(a) Na
(b) Ca
(c) Mg
(d) Fe
Q2:  Study the given table and answer the following questions: 
A student took the samples of four metals A, B, C and D and added the following solution one by one. The results obtained have been tabulated as follows:

(a) Which is the most reactive metal? (1 Marks)
(b) What would you observe if B is added to a solution of 
(i) Copper 
(ii) Sulphate? (1 Marks)
(c) Arrange the metals A, B, C and D in the order of decreasing reactivity? (1 Marks)
(d) Which gas is produced when dilute HCl is added to a reactive metal? (1 Marks)
Q3: What is meant by metallurgy? (1 Marks)
Q4:  (a) Write chemical equations for the following reactions :  (5 Marks)
(i) Calcium metal reacts with water.
(ii) Cinnabar is heated in the presence of air.
(iii) Manganese dioxide is heated with aluminium powder.
(b) What are alloys? List two properties of alloys.
Q5:  Describe electrolytic refining of copper with chemical equations. Draw a well-labelled diagram for it.  (3 Marks)
Q6:  Name a non-metal which is lustrous and a metal which is non-lustrous. (1 Marks)
Q7: Assertion and Reason :
Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as: 
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(c) Assertion ( A) is true but reason (R) is false.
(d) Assertion ( A) is false but reason (R) is true.
(i) Assertion (A): Zinc oxide is amphoteric in nature.
Reason (R): Zinc oxide reacts with both acids and bases. (1 Marks)

(ii) Assertion (A): Metals are sonorous.
Reason (R): They are generally brittle in the solid-state; they break into pieces when hammered.  (1 Marks)

(iii) Assertion (A): Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.
Reason (R): Carbon dioxide is given off in the reaction.  (1 Marks)
Q8:  What happens when zinc granules are treated with dilute solutions of H₂SO₄, HCl, HNO₃, NaCl and NaOH? Also, write the chemical equation. (5 Marks)
Q9:  Explain the following.  (3 Marks)
(a) Sodium chloride is an ionic compound which does not conduct electricity in solid state, whereas it conducts electricity in molten state as well as in its aqueous solution.
(b) Reactivity of aluminium decreases if it is dipped in nitric acid.
(c) Metals like calcium and magnesium are never found in their free state in nature.
Q10:  Define alloys. List the properties of alloys that make them useful over pure metals? Explain this fact with suitable examples.  (3 Marks)

You can access the solutions to this worksheet here.