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. What happens when silicon reacts with oxygen? Silicon dioxide Silicon phosphate Silicon nitrate None of these None 2. 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)? HCl H2SO4 HNO3 All of these None 3. An electrolytic cell consists of (i) Positively charged cathode (ii) Negatively charged anode (iii) Positively charged anode (iv) Negatively charged cathode (ii) ad (iv) (iii) and (iv) (i) and (ii) (i) and (iii) None 4. 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 5. Which statement is false? Non metals are good conductors of heat and electricity Metals are Solid at room temperature except mercury Non metals are Occur as solid or gas Non metals have low melting point None 6. Which one of the following properties is not generally exhibited by ionic compounds? Solubility in water Electrical conductivity in molten state High melting and boiling points Electrical conductivity in solid state None 7. Which one of the following metals do not react with cold as well as hot water? Magnesium (Mg) Iron (Fe) Sodium (Na) Calcium (Ca) None 8. What happens when dilute sulphuric acid is poured on a copper plate? Zinc sulphate formed Copper chloride formed Copper does not react sulphuric acid None 9. Which of the following is true? All the above Aluminum is more reactive than Copper Color of basic copper carbonate is green Malachite is an ore of Copper None 10. The following metals exist in their native state: Fe, Ag, Au Pt, Au, Ag All of these Ne, He, Ar None 11. The property of metals by which they can be beaten in to thin sheets is called- Ductility Conduction Malleability Expansion None 12. Which of the following metals cannot be extracted using smelting Zn Fe Pb Al None 13. 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) - f, (iii) - c, (iv) - a, (v) - b, (vi) - e (i) - d, (ii) - e, (iii) - c, (iv) - f, (v) - b, (vi) - a (i) - c, (ii) - e, (iii) - a, (iv) - f, (v) - d, (vi) - b None 14. What are the main impurities present with bauxite ore? Silica, Calcium carbonate Silica, Iron oxide Sulphur, Iron oxide All of the above 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) (i) and (iv) (ii) and (iii) None 16. Which of the following property is generally not shown by metals? Ductility Dullness Sonorous in nature Electrical conduction None 17. The ability of metals to be drawn into thin wire is known as Sonorousity Conductivity Malleability Ductility None 18. Which of the following property is generally not shown by metals (except some metals)? Electrical conduction Ductility Sonorous in nature Dullness None 19. 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 20. 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 (iv) (i) and (ii) (ii) and (iii) (i) and (iii) 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.
