Download App

Science M.C.Q-[Che-1M]

Metals and Non-Metals · CBSE STD 10 (CBSE - English Medium). 36 questions.

Questions

M.C.Q-[Che-1M]

🎯

Test yourself on this topic

36 questions · timed · auto-graded

Question 11 Mark
Which one of the following properties is not generally exhibited by ionic compounds?
  1. Solubility in water.
  2. Electrical conductivity in solid state.
  3. High melting and boiling points.
  4. Electrical conductivity in molten state.
Answer
  1. Electrical conductivity in solid state.

Explanation: Ionic compounds can conduct electricity in molten or aqueous state due to presence of free ions. In solid state, no free or mobile ions are available for conducting electricity.

View full question & answer→
Question 21 Mark
Which one of the following metals do not react with cold as well as hot water?
  1. Na.
  2. Ca.
  3. Mg.
  4. Fe.
Answer
  1. Fe.

Explanation: Na, Ca and Mg are reactive metals and quickly react with water. At room temperature, the reaction of Fe is very slow but red hot iron reacts with steam to form Fe3O4 with hydrogen gas.

3Fe + 4H2O → Fe3O4 + 4H2​​​​​​​

View full question & answer→
Question 31 Mark
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
  1. Mg
  2. Ag
  3. Zn
  4. Cu
Answer
  1. Ag

Explanation: Least reactive metal can be displaced from its solution by other three metals. Silver is least reactive out of given four metals.

View full question & answer→
Question 41 Mark
Which one of the following figures correctly describes the process of electrolytic refining?

 

Answer
 

Explanation: Cu2+ ions are released from anode by the oxidation of copper (Cu). These migrate towards cathode and are reduced to copper (Cu).

View full question & answer→
Question 51 Mark
Which of the following property is generally not shown by metals?
  1. Electrical conduction.
  2. Sonorous in nature.
  3. Dullness.
  4. Ductility.
Answer
  1. Dullness.

Explanation: Metals have shining lustre and they mostly do not show any dullness.

View full question & answer→
Question 61 Mark
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
  1. FeO
  2. Fe2O3
  3. Fe3O4
  4. Fe2O3 and Fe3O4
Answer
  1. Fe3O4

Explanation: Following equation shows the reaction between iron and steam.

3Fe + 4H2O → Fe3O4 + 4H2

View full question & answer→
Question 71 Mark
Which of the following non-metals is a liquid?
  1. Carbon.
  2. Bromine.
  3. Phosphorus.
  4. Sulphur.
Answer
  1. Bromine.

Explanation: Non-metal bromine is a liquid but in the molecular form (Br2).

View full question & answer→
Question 81 Mark
Which of the following metals exist in their native state in nature?
  1. Cu
  2. Au
  3. Zn
  4. Ag
  1. 1 and 2
  2. 2 and 3
  3. 2 and 4
  4. 3 and 4
Answer
  1. 2 and 4

Explanation: Gold and silver (Au and Ag) are also known as Noble metals as they are less reactive and exist in their native state in nature.

View full question & answer→
Question 91 Mark
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
  1. Na
  2. Ca
  3. Fe
  4. Cu
  1. 1 and 4
  2. 3 and 4
  3. 1 and 3
  4. 1 and 2
Answer
  1. 1 and 2

Explanation: Usually alkali and alkaline earth metals can be extracted by electrolysis of their salts in molten state.

View full question & answer→
Question 101 Mark
Which of the following can undergo a chemical reaction?
  1. MgSO4 + Fe.
  2. ZnSO4 + Fe.
  3. MgSO4 + Pb.
  4. CuSO4 + Fe.
Answer
  1. CuSO4 + Fe.

Explanation: Iron is more reactive than copper. Hence, iron displaces copper from copper sulphate solution.

View full question & answer→
Question 111 Mark
Which of the following are not ionic compounds?
  1. KCl
  2. HCl
  3. CCl4
  4. NaCl
  1. 1 and 2
  2. 2 and 3
  3. 3 and 4
  4. 1 and 3
Answer
  1. 2 and 3

Explanation: Both HCl and CCl4 are covalent compounds in nature.

View full question & answer→
Question 121 Mark
Which among the following statements is incorrect for magnesium metal?
  1. It burns in oxygen with a dazzling white flame.
  2. It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
  3. It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.
  4. It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.
Answer
  1. It reacts with cold water to form magnesium oxide and evolves hydrogen gas.

Explanation: Magnesium metal does not react with cold water but reacts with both hot water and steam to form magnesium hydroxide and hydrogen gas.

View full question & answer→
Question 131 Mark
Which among the following alloys contain mercury as one of its constituents?
  1. Stainless steel.
  2. Alnico.
  3. Solder.
  4. Zinc amalgam.
Answer
  1. Zinc amalgam.

Explanation: Alloys of mercury are called amalgam.

View full question & answer→
Question 141 Mark
What happens when calcium is treated with water?
  1. It does not react with water.
  2. It reacts violently with water.
  3. It reacts less violently with water.
  4. Bubbles of hydrogen gas formed stick to the surface of calcium.
  1. 1 and 4
  2. 2 and 3
  3. 1 and 2
  4. 3 and 4
Answer
  1. 3 and 4

Explanation: Calcium reacts less violently with water producing the bubbles of hydrogen gas along with calcium hydroxide (Ca(OH)2).

$\text{Ca(s)}+2\text{H}_2\text{O(l)}\rightarrow\text{Ca(OH)}_2\text{(aq) + H}_2\text{(g)}\uparrow$​​​​​​​

View full question & answer→
Question 151 Mark
The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct?
  1. X is a metal.
  2. Y is a metal.
  3. Z is a non-metal.
  4. Y is a non-metal and Z is a metal.
Answer
  1. Y is a non-metal and Z is a metal.

Explanation: Y is sulphur (S) while Z is sodium (Na).

View full question & answer→
Question 161 Mark
The composition of aqua-regia is:

  1. Dil.HCl : Conc. HNO3

3 : 1

  1. Conc.HCl : Dil. HNO3

3 : 1

  1. Conc.HCl : Conc.HNO3

3 : 1

  1. Dil.HCl : Dil.HNO3

3 : 1

Answer
  1. Conc.HCl : Conc.HNO3

3 : 1

Explanation: Aqua-regia is a mixture of concentrated HCl and concentrated HNO3 in 3 : 1 ratio.

View full question & answer→
Question 171 Mark
The ability of metals to be drawn into thin wire is known as:
  1. Ductility.
  2. Malleability.
  3. Sonorousity.
  4. Conductivity.
Answer
  1. Ductility.

Explanation: Ductility can be defined as the property of metals to drawn in thin wires by application of force on them.

View full question & answer→
Question 181 Mark
Stainless steel is very useful material for our life. In stainless steel, iron is mixed with:
  1. Ni and Cr.
  2. Cu and Cr.
  3. Ni and Cu.
  4. Cu and Au.
Answer
  1. Ni and Cr.

Explanation: Stainless steels are formed with the addition of high proportion of chromium and nickel to iron.

View full question & answer→
Question 191 Mark
Silver articles become black on prolonged exposure to air. This is due to the formation of:
  1. Ag3N
  2. Ag2O
  3. Ag2S
  4. Ag2S and Ag3N
Answer
  1. Ag2S

Explanation: Air contains traces of hydrogen sulphide (H2S) gas which reacts with silver (Ag) to form Ag2S black in colour.

View full question & answer→
Question 201 Mark
Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
  1. Has high melting point.
  2. Has low melting point.
  3. Conducts electricity in molten state.
  4. Occurs as solid.
Answer
  1. Has low melting point.

Explanation: Z is an ionic compound. Therefore, it is not expected to have low melting point.

View full question & answer→
Question 211 Mark
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
  1. Au
  2. Cu
  3. Na
  4. K
  1. 1 and 2
  2. 1 and 3
  3. 2 and 3
  4. 2 and 4
Answer
  1. 1 and 2

Explanation: Alkali metals are very reactive so cannot refine with the help of electrolytic refining process.

Electrolytic refining is used for metals like Cu, Zn, Ag, Au etc. The method to be used for refining an impure metal depends on the nature of the metals well as on the nature of impurities present in it. So, metals Au (gold) and Cu (copper) are refined by electrolytic refining.

View full question & answer→
Question 221 Mark
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:
  1. CuSO4
  2. CuCO3
  3. Cu(NO3)2
  4. CuO
Answer
  1. CuCO3

Explanation: When kept in open air, Copper reacts with oxygen to form copper oxide which appears as greenish layer.

View full question & answer→
Question 231 Mark
Generally, non-metals are not lustrous. Which of the following nonmetal is lustrous?
  1. Sulphur.
  2. Oxygen.
  3. Nitrogen.
  4. Iodine.
Answer
  1. Iodine.

Explanation: Iodine is lustrous.

View full question & answer→
Question 241 Mark
Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?
  1. Diamond.
  2. Graphite.
  3. Sulphur.
  4. Fullerene.
Answer
  1. Graphite.

Explanation: Graphite is one of the allotropes of carbon which shows layers arrangement of carbon atoms. The fourth valence electron of each carbon is free to move that makes it good conductor of electricity.

View full question & answer→
Question 251 Mark
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)?
  1. H2SO4
  2. HCl
  3. HNO3
  4. All of these.
Answer
  1. HNO3

Explanation: HNO3 is a strong oxidising agent. It oxidises metals to metal oxides and then to metal nitrates and itself is reduced to either nitric oxide (NO), nitruos oxide (N2O) or nitrogen dioxide (NO2). However, both Mg and Mn evolve hydrogen on reacting with the acid.

View full question & answer→
Question 261 Mark
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
  1. Na
  2. Fe
  3. Cr
  4. Hg
Answer
  1. Hg

Explanation: Mercury (Hg) is a liquid at room temperature.

View full question & answer→
Question 271 Mark
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of:
  1. Gallium.
  2. Aluminium.
  3. Zinc.
  4. Silver.
Answer
  1. Zinc.

Explanation: Applying a layer of zinc through electrolysis is called galvanization.

View full question & answer→
Question 281 Mark
Electrical wires have a coating of an insulting material. The material, generally used is:
  1. Sulphur.
  2. Graphite.
  3. PVC.
  4. All can be used.
Answer
  1. PVC.

Explanation: PVC (Poly Vinyl Chloride) coatings are generally used for insulating electrical wires.

View full question & answer→
Question 291 Mark
During electrolytic refining of zinc, it gets:
  1. Deposited on cathode.
  2. Deposited on anode.
  3. Deposited on cathode as well as anode.
  4. Remains in the solution.
Answer
  1. Deposited on cathode.

Explanation: Zinc is positively charged and hence is deposited at negatively charged cathode.

View full question & answer→
Question 301 Mark
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:
  1. Mg
  2. Na
  3. P
  4. Ca​​​​​​​
Answer
  1. Na

Explanation: Sodium (Na) gives all the characteristics of the element X.

View full question & answer→
Question 311 Mark
An electrolytic cell consists of:
  1. Positively charged cathode.
  2. Negatively charged anode.
  3. Positively charged anode.
  4. Negatively charged cathode.
  1. 1 and 2
  2. 3 and 4
  3. 1 and 3
  4. 2 and 4
Answer
  1. 3 and 4

Explanation: Negative charged particles (anions) move towards anode; which shows anode is positively charged.

View full question & answer→
Question 321 Mark
An alloy is:
  1. An element.
  2. A compound.
  3. A homogeneous mixture.
  4. A heterogeneous mixture.
Answer
  1. A homogeneous mixture.

Explanation: A homogeneous mixture of different metals or a metal and a non-metal is called as alloy.

View full question & answer→
Question 331 Mark
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
  1. Good thermal conductivity.
  2. Good electrical conductivity.
  3. Ductility.
  4. High melting point.
  1. 1 and 2
  2. 1 and 3
  3. 2 and 3
  4. 1 and 4
Answer
  1. 1 and 4

Explanation: Electrical conductivity and ductility have no relevance for a cooking utensil. These properties also do not enhance cooking.

View full question & answer→
Question 341 Mark
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
  1. Na
  2. Ca
  3. Al
  4. Cu
Answer
  1. Al

Explanation: Some of the metals like Aluminium (Al) metal forms amphoteric oxide (A12O3) which can behave like acid as well as base.

View full question & answer→
Question 351 Mark
Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?
  1. Brass.
  2. Bronze.
  3. Amalgam.
  4. Steel.
Answer
  1. Steel.

Explanation:

  1. Brass - Copper and zinc.
  2. Bronze - Copper and tin.
  3. Amalgam - Mercury with other metals.
  4. Steel - Iron with carbon.
View full question & answer→
Question 361 Mark
2mL 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:
  1. Al
  2. Au
  3. Cu
  4. Pt
Answer
  1. Au

Explanation: Gold (Au) dissolves in aqua regia.

View full question & answer→
Generate Paper FreeAll Metals and Non-Metals topics
M.C.Q-[Che-1M] - Science STD 10 Questions - Vidyadip