Ncert – class 10- science – Chapter 3 – Metals and Non-metals 2 Welcome to your Ncert - class 10- science - Chapter 3 – Metals and Non-metals 2 1. Which one of the following properties is not generally exhibited by ionic compounds? Electrical conductivity in molten state Solubility in water Electrical conductivity in solid state High melting and boiling points None 2. The following metals exist in their native state: Ne, He, Ar All of these Pt, Au, Ag Fe, Ag, Au None 3. Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)? H2SO4 HCl All of these HNO3 None 4. Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same? (i) Good thermal conductivity or good heat conduction (ii) Good conduction of electricity (iii) Ductility (iv) High melting point (i) and (ii) (i) and (iv) (i) and (iii) (ii) and (iii) None 5. What happens when dilute sulphuric acid is poured on a copper plate? Copper does not react sulphuric acid Zinc sulphate formed Copper chloride formed None 6. Which of the following property is generally not shown by metals (except some metals)? Dullness Sonorous in nature Ductility Electrical conduction None 7. What happens when silicon reacts with oxygen? Silicon phosphate Silicon nitrate None of these Silicon dioxide None 8. Which of the following property is generally not shown by metals? Sonorous in nature Electrical conduction Dullness Ductility None 9. Which one of the following properties is not generally exhibited by ionic compounds? High melting and boiling points Electrical conductivity in molten state Solubility in water Electrical conductivity in solid state None 10. The ability of metals to be drawn into thin wire is known as Conductivity Ductility Malleability Sonorousity None 11. Match the substances given in Column A with their uses given in Column B. Column AColumn B(i) Gold(a) Thermometers(ii) Iron (b) Electric wire(iii) Aluminium(c) Wrapping food(iv) Carbon(d) Jewellery(v) Copper(e) Machinery(vi) Mercury(f) Fuel (i) - b, (ii) - d, (iii) - c, (iv) - e, (v) - a, (vi) - f (i) - d, (ii) - e, (iii) - c, (iv) - f, (v) - b, (vi) - a (i) - d, (ii) - f, (iii) - c, (iv) - a, (v) - b, (vi) - e (i) - c, (ii) - e, (iii) - a, (iv) - f, (v) - d, (vi) - b None 12. Which statement is false? Metals are Solid at room temperature except mercury Non metals have low melting point Non metals are Occur as solid or gas Non metals are good conductors of heat and electricity None 13. What are the main impurities present with bauxite ore? Sulphur, Iron oxide All of the above Silica, Calcium carbonate Silica, Iron oxide None 14. Which of the following is true? Color of basic copper carbonate is green All the above Malachite is an ore of Copper Aluminum is more reactive than Copper None 15. What happens when calcium is treated with water? (i) It does not react with water (ii) It reacts violently with water (iii) It reacts less violently with water (iv) Bubbles of hydrogen gas formed stick to the surface of calcium (i) and (ii) (iii) and (iv) (ii) and (iii) (i) and (iv) None 16. The property of metals by which they can be beaten in to thin sheets is called- Expansion Ductility Conduction Malleability None 17. An electrolytic cell consists of (i) Positively charged cathode (ii) Negatively charged anode (iii) Positively charged anode (iv) Negatively charged cathode (iii) and (iv) (i) and (iii) (ii) ad (iv) (i) and (ii) None 18. Which element is stored in water and which element is stored in kerosene? Magnesium and sodium respectively Phosphorus and sodium respectively Calcium and phosphorus respectively Sodium and phosphorus respectively None 19. Which one of the following metals do not react with cold as well as hot water? Calcium (Ca) Sodium (Na) Iron (Fe) Magnesium (Mg) None 20. Which of the following metals cannot be extracted using smelting Al Zn Fe Pb None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
