Official Class 10 Science Worksheets: Chapter 03 Metals and Nonmetals
Explore structured practice materials through the CBSE Class 10 Science Metals and Non-metals Worksheet Set 21. Tailored for Class 10 learners, utilizing these Science worksheets ensures thorough preparation and strengthens problem-solving accuracy before final school evaluations.
Solved Practice Worksheets for Science
View or download the dedicated CBSE Class 10 Science Metals and Non-metals Worksheet Set 21 resource below. Engaging with these practice papers under focused study conditions ensures continuous academic progress and mastery of the 2026-27 curriculum for Chapter 03 Metals and Nonmetals.
Questions
Q1. Reaction between X and Y forms compound Z. X loses electrons and Y gains electrons. Which property is NOT shown by Z? [1 mark]
(a) High melting point
(b) Low melting point
(c) Occurs as a solid
(d) Conducts electricity in molten state
View Answer & Explanation
Answer: (b) Low melting point. Z is an ionic compound, which has a high melting point.
Teacher's Note:
1. Ionic compounds have strong electrostatic forces between ions.
2. They conduct electricity when molten or dissolved.
Q2. Metals generally react with dilute acids to give a salt and hydrogen. Which acid does not give hydrogen with metals (except Mg and Mn)? [1 mark]
(a) H₂SO₄
(b) HCl
(c) HNO₃
(d) All of these
View Answer & Explanation
Answer: (c) HNO₃. Nitric acid is a strong oxidising agent and oxidises the hydrogen formed to water.
Teacher's Note:
1. Nitrogen oxides are released instead of hydrogen.
2. Mg and Mn do release hydrogen with very dilute HNO₃.
Q3. Silver articles turn black on prolonged exposure to air. This is due to the formation of [1 mark]
(a) Ag₂S
(b) Ag₂O
(c) Ag₃N
(d) Ag₂S and Ag₃N
View Answer & Explanation
Answer: (a) Ag₂S. Silver reacts with traces of hydrogen sulphide in air to form black silver sulphide.
Teacher's Note:
1. This is a case of corrosion of silver.
2. The black layer can be removed with a suitable cleaner.
Q4. Which of the following alloys contains a non-metal as one of its constituents? [1 mark]
(a) Brass
(b) Bronze
(c) Amalgam
(d) Steel
View Answer & Explanation
Answer: (d) Steel. Steel is iron with a small amount of carbon.
Teacher's Note:
1. Brass is Cu + Zn, bronze is Cu + Sn and amalgam contains mercury.
2. Only steel has carbon, which is a non-metal.
Q5. Three unknown metals A, B and C: C displaces B from its oxide, while with the oxide of A there is no reaction. Give the order of reactivity. [2 marks]
View Answer & Explanation
Answer: A > C > B. C can displace B from its oxide so C is more reactive than B, but C cannot displace A so A is more reactive than C.
Teacher's Note:
1. A more reactive metal displaces a less reactive one from its compounds.
2. No reaction means the added metal is the less reactive one.
Q6. A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black compound. Identify M and the compound. [2 marks]
View Answer & Explanation
Answer: M is copper and the black compound is copper(II) oxide: 2Cu + O₂ → 2CuO.
Teacher's Note:
1. Copper lies below hydrogen in the reactivity series.
2. Copper oxide is a basic oxide.
Q7. Aqua regia is prepared by mixing two acids A and B. It dissolves gold and platinum. Identify A and B and the ratio in which they are mixed. [2 marks]
View Answer & Explanation
Answer: A is concentrated hydrochloric acid and B is concentrated nitric acid, mixed in the ratio 3 : 1 by volume.
Teacher's Note:
1. Aqua regia means royal water in Latin.
2. It dissolves noble metals that single acids cannot.
Q8. A non-metal X exists in two forms Y and Z. Y is the hardest natural substance and Z is a good conductor of electricity. Identify X, Y and Z. [2 marks]
View Answer & Explanation
Answer: X is carbon, Y is diamond and Z is graphite.
Teacher's Note:
1. Forms of the same element with different structures are allotropes.
2. Graphite conducts because each carbon has one free electron.
Q9. A metal X reacts with cold water to give a base XOH of molecular mass 40 and a gas Z that readily catches fire. Identify X, the base Y and Z. [3 marks]
View Answer & Explanation
Answer: Mass of OH is 17, so atomic mass of X is 40 − 17 = 23; X is sodium. Y is sodium hydroxide, NaOH, and Z is hydrogen: 2Na + 2H₂O → 2NaOH + H₂.
Teacher's Note:
1. Sodium is stored under kerosene because it reacts so vigorously.
2. Hydrogen burns with a pop sound.
Q10. Suggest the method of reduction for (a) a metal A in the lower-middle to low part of the reactivity series, (b) a metal B that reacts vigorously with water and air, (c) a metal C in the middle of the series. [3 marks]
View Answer & Explanation
Answer: (a) A can be obtained by heating its oxide or ore (for example mercury, silver or copper).
(b) B is obtained by electrolytic reduction of its molten chloride or oxide (for example Na, Ca, Al).
(c) C is reduced by carbon or by a reactive metal such as aluminium (for example Zn, Fe).
Teacher's Note:
1. The more reactive the metal, the stronger the method needed to extract it.
2. Reduction with Al is called a thermite-type reaction.
Q11. In the formation of a compound between atoms A and B, A loses two electrons and B gains one. (a) What is the nature of the bond? (b) Give the formula of the compound. (c) Show the formation of calcium chloride on similar lines. [3 marks]
View Answer & Explanation
Answer: (a) Ionic bond.
(b) AB₂ (A²⁺ and two B⁻ ions).
(c) Ca (2,8,8,2) → Ca²⁺ + 2e⁻; each Cl (2,8,7) + e⁻ → Cl⁻ (2,8,8); so Ca²⁺ combines with two Cl⁻ to give CaCl₂.
Teacher's Note:
1. Total charge in an ionic compound is zero.
2. Calcium gives its two valence electrons to two chlorine atoms.
Q12. A yellow powder X is soluble in carbon disulphide and burns with a blue flame to give a suffocating gas that turns moist blue litmus red. Identify X, give the reaction and say whether it is a metal or non-metal. [2 marks]
View Answer & Explanation
Answer: X is sulphur: S + O₂ → SO₂. It is a non-metal.
Teacher's Note:
1. SO₂ dissolves in moisture to form sulphurous acid, an acid.
2. Non-metallic oxides are acidic.
Q13. A metal A used in the thermite process gives an oxide B on heating in oxygen; B is amphoteric. Identify A and B and write the reactions of B with HCl and NaOH. [3 marks]
View Answer & Explanation
Answer: A is aluminium and B is aluminium oxide, Al₂O₃.
Al₂O₃ + 6HCl → 2AlCl₃ + 3H₂O
Al₂O₃ + 2NaOH → 2NaAlO₂ + H₂O
Teacher's Note:
1. An amphoteric oxide reacts with both acids and bases.
2. Sodium aluminate is the salt formed with NaOH.
Q14. An element is on the far left of the periodic table and reacts spontaneously with air and water at room temperature. (a) Name the element and write its symbol. (b) Give the formula of its oxide. (c) State the nature of the oxide. [3 marks]
View Answer & Explanation
Answer: (a) Sodium, Na (potassium is also acceptable).
(b) Na₂O.
(c) It is a basic oxide; it dissolves in water to give NaOH.
Teacher's Note:
1. Alkali metals are the most reactive metals.
2. They are stored under kerosene.
Q15. Riya put Zn, Al, Cu, Fe, Mg and Na separately in cold water, hot water and steam. (a) Which metal reacts with cold water? (b) Which metals react with steam? (c) Which metal reacts with hot water? (d) Arrange the six metals in order of increasing reactivity. [4 marks]
View Answer & Explanation
Answer: (a) Na.
(b) Al, Zn and Fe (Mg also reacts with steam).
(c) Mg.
(d) Cu < Fe < Zn < Al < Mg < Na.
Teacher's Note:
1. Copper does not react with water in any form.
2. Sodium is the most reactive and copper the least among these.
Q16. An element M burns in oxygen to form an electrovalent compound MO. What compounds do you expect when it combines with chlorine and with sulphur? [3 marks]
View Answer & Explanation
Answer: In MO oxygen takes two electrons, so M loses two and forms M²⁺. It gives MCl₂ with chlorine (M²⁺ + 2Cl⁻) and MS with sulphur (M²⁺ + S²⁻).
Teacher's Note:
1. The valency of M is 2.
2. Use criss-cross of charges to get the formulae.
Q17. A yellow malleable alloy is made of metals A and B. With dilute H₂SO₄, A dissolves to give a colourless solution and B remains undissolved with a reddish-brown colour. (a) Identify A and B. (b) Name the alloy. (c) Write the equation. [3 marks]
View Answer & Explanation
Answer: (a) A is zinc and B is copper.
(b) Brass.
(c) Zn + H₂SO₄ → ZnSO₄ + H₂ (copper does not react).
Teacher's Note:
1. Zinc is above hydrogen in the reactivity series; copper is below it.
2. Brass is about 70% copper and 30% zinc.
Q18. A copper coin is kept in silver nitrate solution for some time. What happens to the coin and to the colour of the solution? [3 marks]
View Answer & Explanation
Answer: Copper is more reactive than silver, so it displaces silver: Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag. The coin gets a shiny grey (silvery) deposit and the colourless solution turns blue.
Teacher's Note:
1. Blue colour is due to copper(II) nitrate.
2. This is a displacement reaction.
Free study material for Science
CBSE Class 10 Science Worksheets for Chapter 03 Metals and Nonmetals
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Access structured practice worksheets for Chapter 03 Metals and Nonmetals aligned with the 2026 CBSE curriculum. These downloadable exercises for Class 10 Science help students build accuracy and reinforce core concepts for upcoming school tests.
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