Metals and Non-Metals: Class 10 Science Q&A · Page 4

114 free answers on Metals and Non-Metals (Science) for Class 10 students, across CBSE, ICSE and State boards.

Question & Answer

Questions

114 TOTAL

ScienceClass 10CBSE
Alloys are homogeneous mixtures of a metal with a metal or Which among the following alloys contain non-metal as one of its constituents?Brass Bronze Amalgam Steel
Soln: Answer is (d) Steel Explanation: Steel is an alloy made up of carbon and iron where carbon is a non-metal.
ScienceClass 10CBSE
An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following (a) Mg (b) Na (c) P (d) Ca
Soln: Answer is (b) Na Explanation: Sodium is soft which can be cut with a knife. Sodium reacts with water and air vigorously hence it is kept in kerosene.
ScienceClass 10CBSE
During electrolytic refining of zinc, it gets (a) deposited on cathode (b) deposited on anode (c) deposited on cathode as well as anode remains in the solution
Soln: Answer is (a) deposited on cathode Explanation: Zinc is positively charged hence it moves towards negatively charged cathode.
ScienceClass 10CBSE
An electrolytic cell consists of (i) positively charged cathode (ii) negatively charged anode (iii) positively charged anode (iv) negatively charged cathode (a) (i) and (ii) (b) (iii) and (iv) (c) (i) and (iii) (ii) ad (iv)
Soln: Answer is (b) (iii) and (iv)
ScienceClass 10CBSE
An alloy is (a) an element (b) a compound (c) a homogeneous mixture a heterogeneous mixture
Soln: Answer is (c) a homogeneous mixture Explanation: An Alloy is a homogeneous mixture because its composition is uniform.
ScienceClass 10CBSE
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be (a) Al (b) Au (c) Cu (d) Pt
Soln: Answer is (b) Au Explanation: Answer is gold because solution C is mixture of Concentrated HCL and Concentrated HNO3 which is called aqua rezia. Aqua Rezia dissolves gold.
ScienceClass 10CBSE
Generally, non-metals are not lustrous. Which of the following nonmetal is lustrous? (a) Sulphur (b) Oxygen (c) Nitrogen Iodine
Soln: Answer is (d) Iodine
ScienceClass 10CBSE
Which of the following metals are obtained by electrolysis of their chlorides in molten state ? (i) Na (ii) Ca (iii) Fe (iv) Cu (a) (i) and (iv) (b) (iii) and (iv) (c) (i) and (iii) (i) and (ii)
Soln: Answer is (d) (i) and (ii) Explanation: Sodium and Calcium are in the top in reactivity series
ScienceClass 10CBSE
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature? (a) Na (b) Fe (c) Cr (d) Hg
Soln: Answer is (d) Hg
ScienceClass 10CBSE
If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of (a) CuSO4 (b) CuCO3 (c) Cu(NO3 ) 2 CuO
Soln: Answer is (d) CuO Explanation: On exposure to air copper reacts to atmospheric oxygen to form copper oxide layer which is green in color.
ScienceClass 10CBSE
Stainless steel is very useful material for our life. In stainless steel, iron is mixed with (a) Ni and Cr (b) Cu and Cr (c) Ni and Cu Cu and Au
Soln: Answer is (a) Ni and Cr Explanation : Stainless steel is an alloy of Iron, Nicker and chromium. This alloy makes the metal strong, durable and corrosion resistant.
ScienceClass 10CBSE
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of (a) Gallium (b) Aluminium (c) Zinc Silver
Soln: Answer is(c) Zinc Explanation: Galvanization is a process of applying a layer of Zinc on iron by using electrolysis.
ScienceClass 10CBSE
Silver articles become black on prolonged exposure to air. This is due to the formation of (a) Ag3N (b) Ag2O (c) Ag2 S Ag2S and Ag3N
Soln: Answer is (c) Ag2S Explanation: Silver metal reacts with sulphur present in the atmosphere to form Ag2S. Ag2S is responsibkle foer black coloration of silver articles.
ScienceClass 10CBSE
Which of the following metals exist in their native state in nature? (i) Cu (ii) Au (iii) Zn (iv) Ag (a) (i) and (ii) (b) (ii) and (iii) (c) (ii) and (iv) (iii) and (iv)
Soln: Answer is (d) (iii) and (iv) Explanation: Sodium and potassium are at the top in reactivity series hence they can be refined by electrolytic refining.
ScienceClass 10CBSE
Which one of the following properties is not generally exhibited by ionic compounds? (a) Solubility in water (b) Electrical conductivity in solid state (c) High melting and boiling points Electrical conductivity in molten state
Soln: Answer is (b) Electrical conductivity in solid state Explanation: In ionic compound free ions are not available in solid state hence solid ionic compounds cannot conduct electricity.
ScienceClass 10CBSE
Which of the following are not ionic compounds? (i) KCl (ii) HCl (iii) CCl4 (iv) NaCl (a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (i) and (iii)
Soln: Answer is (b) (ii) and (iii) Explanation: HCl and CCl4 are covalent compound hence they cannot be ionic.
ScienceClass 10CBSE
The composition of aqua-regia is (a) Dil.HCl : Conc. HNO3 3 : 1 (b) Conc.HCl : Dil. HNO3 3 : 1 (c) Conc.HCl : Conc.HNO3 3 : 1 (d) Dil.HCl : Dil.HNO3 3 : 1
Soln: Answer is (c) Conc.HCl : Conc.HNO3 3 : 1
ScienceClass 10CBSE
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)? (a) H2 SO4 (b) HCl (c) HNO3 All of these
Soln: Answer is (c) HNO3 Explanation: Nitric acid is a powerful oxidizing agent. It reacts with metal to form water.
ScienceClass 10CBSE
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 (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (ii) (d) (iii) and (iv)
Soln: Answer is (d) (iii) and (iv) Explanation: Calcium reacts vigorously with water and forms hydrogen which will make calcium to float.
ScienceClass 10CBSE
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam? (a) FeO (b) Fe2O3 (c) Fe3O4 Fe2O3 and Fe3O4
Soln: Answer is (c) Fe3O4 Explanation: 3Fe+4H2O Fe3O4+4H2

All Class 10 Science Q&A Browse all Q&A

Metals and Non-Metals: Class 10 Science Q&A · Page 4

Questions

Alloys are homogeneous mixtures of a metal with a metal or Which among the following alloys contain non-metal as one of its constituents?Brass Bronze Amalgam Steel

An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following (a) Mg (b) Na (c) P (d) Ca

During electrolytic refining of zinc, it gets (a) deposited on cathode (b) deposited on anode (c) deposited on cathode as well as anode remains in the solution

An electrolytic cell consists of (i) positively charged cathode (ii) negatively charged anode (iii) positively charged anode (iv) negatively charged cathode (a) (i) and (ii) (b) (iii) and (iv) (c) (i) and (iii) (ii) ad (iv)

An alloy is (a) an element (b) a compound (c) a homogeneous mixture a heterogeneous mixture

Generally, non-metals are not lustrous. Which of the following nonmetal is lustrous? (a) Sulphur (b) Oxygen (c) Nitrogen Iodine

Which of the following metals are obtained by electrolysis of their chlorides in molten state ? (i) Na (ii) Ca (iii) Fe (iv) Cu (a) (i) and (iv) (b) (iii) and (iv) (c) (i) and (iii) (i) and (ii)

Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature? (a) Na (b) Fe (c) Cr (d) Hg

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of (a) CuSO4 (b) CuCO3 (c) Cu(NO3 ) 2 CuO

Stainless steel is very useful material for our life. In stainless steel, iron is mixed with (a) Ni and Cr (b) Cu and Cr (c) Ni and Cu Cu and Au

Galvanisation is a method of protecting iron from rusting by coating with a thin layer of (a) Gallium (b) Aluminium (c) Zinc Silver

Silver articles become black on prolonged exposure to air. This is due to the formation of (a) Ag3N (b) Ag2O (c) Ag2 S Ag2S and Ag3N

Which of the following metals exist in their native state in nature? (i) Cu (ii) Au (iii) Zn (iv) Ag (a) (i) and (ii) (b) (ii) and (iii) (c) (ii) and (iv) (iii) and (iv)

Which one of the following properties is not generally exhibited by ionic compounds? (a) Solubility in water (b) Electrical conductivity in solid state (c) High melting and boiling points Electrical conductivity in molten state

Which of the following are not ionic compounds? (i) KCl (ii) HCl (iii) CCl4 (iv) NaCl (a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (i) and (iii)

The composition of aqua-regia is (a) Dil.HCl : Conc. HNO3 3 : 1 (b) Conc.HCl : Dil. HNO3 3 : 1 (c) Conc.HCl : Conc.HNO3 3 : 1 (d) Dil.HCl : Dil.HNO3 3 : 1

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)? (a) H2 SO4 (b) HCl (c) HNO3 All of these

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 (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (ii) (d) (iii) and (iv)

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam? (a) FeO (b) Fe2O3 (c) Fe3O4 Fe2O3 and Fe3O4