CBSE Class 10 Science Metals and Non Metals MCQs Set G

Question. Which of the following can undergo a chemical reaction?
(a) MgSO₄ + Fe
(b) ZnSO₄ + Fe
(c) MgSO₄ + Pb
(d) CuSO₄ + Fe

Answer: D

Question. A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called a/an ________ reaction.
(a) combination
(b) displacement
(c) double displacement
(d) addition

Answer: B

Question. Which of the following metal will not give H₂(g) with H₂O?
(a) Na
(b) Mg
(c) Zn
(d) Cu

Answer: D

Question. In each test tubes A,B,C and D, 2mL of solution of Al2(SO4)3 in water was filled. Clean pieces of zinc was placed in test tube A, clean iron nail was put in test tube B, silver (Ag) was placed in test tube C and a clean copper wire was placed in test tube D. Which of the following option is correct about above experiment?
(a) Zinc is more reactive than aluminium
(b) Copper is more reactive than aluminium
(c) Zinc is less reactive than copper
(d) Zinc, iron, silver and copper are less reactive than aluminium

Answer: D

Question. Name the metal which can be cut with a knife.
(a) Calcium
(b) Iron
(c) Sodium
(d) Aluminium

Answer: C

Question. Zinc and copper metal used in the laboratory is available respectively in the form of
(a) Zn filings ,Cu turnings
(b) Zn strips, Cu pellets
(c) Zn granules, Cu turnings
(d) Zn pellets, Cu strips

Answer: C

Question. Name the metal which is abundant in nature
(a) Aluminium
(b) Iron
(c) Zinc
(d) Carbon

Answer: A

Question. Give an example of a metal which is a liquid at room temperature.
(a) Mercury
(b) Magnesium
(c) lead
(d) tin

Answer: A

Question. Metals like zinc and aluminium react with sodium hydroxide to produce ____ gas.
(a) hydrogen
(b) hydrogen sulphide
(c) oxygen
(d) sulphur dioxide

Answer: A

Question. The property of metal by which it can be drawn into wires is called ____________.
(a) sonority
(b) malleability
(c) ductility
(d) lusture

Answer: C

Question. To show experimentally that zinc is more reactive than copper ,the correct procedure is
(a) prepare copper sulphate solution and dip zinc strip in it
(b) prepare zinc sulphate solution and dip copper strip in it
(c) heat zinc and copper strips.
(d) add dilute nitric acid on both the strips

Answer: A

Question. The blue colour of copper sulphate solution can be changed to pale green by immersing which of the following rod in it.
(a) Iron
(b) Zinc
(c) Aluminium
(d) Silver

Answer: A

Question. The elements and compounds present in the earth‘s crust is called___________
(a) Ore
(b) Gangue
(c) anode mud
(d) minerals

Answer: D

Question. ___________ is found in the free state
(a) Gold
(b) Sodium
(c) Potassium
(d) Calcium

Answer: A

Question. Which of the following is a non-metal but is lustrous?
(a) Carbon
(b) Mercury
(c) Iodine
(d) Fluorine

Answer: C

Question. An incomplete chemical equation of the reaction between iron and oxygen is given below: 4Fe (s) + 3O₂(g) →
Which option shows the products formed during the reaction?
(a) 3Fe₄O₂(s)
(b) 12FeO(s)
(c) 4FeO₃(s)
(d) 2Fe₂O₃(s)

Answer: D

Question. An iron nail was kept immersed in aluminium sulphate solution, after about an hour it was observed that
(a) The colourless solution changes to light green
(b) the solution becomes warm
(c) grey metal is deposited on the iron nail
(d) the solution remains colourless and no deposition is seen on the iron nail

Answer: D

Question. Some crystals of copper sulphate were dissolved in water. The colour of the solution would be
(a) Green
(b) Red
(c) Blue
(d) Brown

Answer: C

Question. Metals, except Al and Zn, react with oxygen to form _______ oxides.
(a) acidic
(b) neutral
(c) amphoteric
(d) basic

Answer: D

Question. When sulphur reacts with oxygen, the oxide formed is _______ in nature.
(a) alkaline
(b) neutral
(c) basic
(d) acidic

Answer: D

Question. A student writes two incomplete chemical reactions.
X – P₄(s) + 5O₂(g) →
Y – 2Mg(s) + O₂(g) →
Which option completes the reactions to form a balanced chemical equation?
(a) X - P5O₄(s); Y-(MgO)₂(s)
(b) X - 4PO₁₀(s); Y- 4MgO(s)
(c) X - P₄O10(s); Y - 2MgO(s)
(d) X - 5P₄O₂(s); Y- Mg₂O₂(s)

Answer: C

Question. A student studying the chemical properties of metals finds incomplete chemical reactions in his book, as shown: MgO + HNO₃ →
Which option completes the reaction?
(a) MgO + HNO₃ → Mg + NO₂ + O₂
(b) MgO + HNO₃ → Mg(NO₃)₂ + H₂O
(c) MgO + HNO₃ → Mg(OH)₂ + 2NO₂
(d) MgO + HNO₃ → Mg₃N2 + 4H₂O

Answer: B

Question. Which of the following can be beaten into thin sheets?
(a) Zinc
(b) Phosphorus
(c) Sulphur
(d) Oxygen

Answer: A

Question. When hydrochloric acid is added to barium hydroxide, a white-colored compound is formed. 
Which option gives the complete chemical reaction?
(a) 2HCl + Ba(OH)₂ → BaH₂ + 2HCl + O₂
(b) 2HCl + Ba(OH)₂ → BaCl₂ + 2HOH
(c) HCl + Ba(OH)₂ → BaCl₂ + 2HOH
(d) HCl + 2Ba(OH) → 2BaCl₂ + 2HOH + O₂

Answer: B

Question. When calcium oxide is added to water, it completely dissolves in water without forming bubbles. What products are formed in this reaction?
(a) Ca and H₂O₂
(b) CaH₂
(c) Ca(OH)₂
(d) Ca and H₂

Answer: C

Question. When you place an iron nail in copper sulphate solution ,the reddish brown coating formed on the nail is
(a) soft and dull
(b) hard and flaky
(c) smooth and shining
(d) rough and granular

Answer: B

Question. Fe₂O₃ +Al ----- Al₂O₃+Fe. The reaction is an example of _______________
(a) combination reaction
(b) decomposition reaction
(c) displacement reaction
(d) double displacement reaction

Answer: C

Question. A student puts one big iron nail each in four test tubes containing solutions of zinc sulphate, aluminium sulphate, copper sulphate and iron sulphate. A reddish brown coating was observed only on the surface of iron nail, which was put in the solution of
(a) zinc sulphate
(b) iron sulphate
(c) copper sulphate
(d) aluminium sulphate

Answer: C

In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
(a) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
(b) Assertion is correct statement but reason is wrong statement.
(c) Assertion is wrong statement but reason is correct statement.
(d) Assertion and reason both are correct statements but reason is not correct explanation for assertion.

Question. A: Aluminium is called a self-protecting metal.
R: Aluminium reacts with atmospheric oxygen to form a very thin layer of aluminium oxide which is sticky in nature.

Answer: B

Question. A: Copper reacts with silver nitrate solution.
R: Copper is placed higher in the reactivity series than silver. Thus it can displace silver from silver nitrate solution.

Answer: A

Question. A: Na, K, Ca react with cold water.
R: They produce their respective hydroxides and hydrogen gas.

Answer: A

Question.A: Sodium metal reacts violently with water.
R: It Floats on the surface of water and melts to form a silvery ball and disappears producing a colourless gas

Answer: A

Question. A: Sodium chloride has a high melting and boiling point.
R: Sodium and chloride ions held by weak inter ionic bond in its molecule.

Answer: B

Question. A: In electrolytic refining, impure copper is taken as cathode and pure copper as anode.
R: Molten chlorides are used as electrolytes in refining of metals.

Answer: B

Question. A: Fe₂O₃ +2Al --- Al₂O₃+2 Fe
R: Due to lot of heat molten iron is formed.

Answer: A

Case Study Based Questions

I. Ionic compound is a chemical compound in which ions are held together by ionic bonds. An ionic bond is the type of chemical bond in which two oppositely charged ions are held through electrostatic forces. We know that, metal atoms have loosely bound valence electrons in their valence shell and non-metal atoms need electrons in their valence shell to attain noble gas configuration. The metal atom loses the valence electrons while non-metal atom accepts these electrons. By losing electrons, metal atoms change to cations and by accepting electrons, non-metals form anions. Ionic compounds are generally solid and exist in the form of crystal. They have high melting and boiling points.

Question. Which of the following can change to a cation?
A. Fluorine
B. Oxygen
C. Potassium
D. Neon

Answer: C

Question. Which of the following can change to an anion?
A. Iodine
B. Magnesium
C. Calcium
D. Xenon

Answer: A

Question. Ionic compounds are soluble in _____________.
A. Kerosene
B. Petrol
C. Water
D. None of these

Answer: C

Question. Which of the following statements is correct about ionic compounds?
I. They conduct electricity in solid state.
II. They conduct electricity in solutions.
III. They conduct electricity in molten state.
A. I only
B. II only
C. III only
D. II and III only

Answer: D

Question. Select the incorrect statement.
A. Ionic compounds are generally brittle
B. Ions are the fundamental units of ionic compounds
C. Formation of ionic bonds involve sharing of electrons
D. NaCl is an ionic compound.

Answer: C

II. The arrangement of metals in a vertical column in the decreasing order of their reactivities is called the reactivity series or activity series of metals. The most reactive metal is at the top position of the reactivity series. The least reactive metal is at the bottom of the reactivity series. Hydrogen, though a non-metal, has been included in the activity series of metals only for comparison. Apart from it, the hydrogen atom also has tendency to lose its valence electron and form cation which behaves like metal H→H+ + e−

Question. Which metal can be displaced by copper from its salt solution?
A. Zinc
B. Silver
C. Iron
D. Lead

Answer: B

Question. An element 'X after reacting with acids liberates hydrogen gas and can displace lead and mercury from their salt solutions. The metal 'X is
A. copper
B. gold
C. calcium
D. hydrogen.

Answer: C

Question. The most reactive metal is
A. potassium
B. barium
C. zinc
D. calcium

Answer: A

Question. The metal which does not liberate hydrogen gas after reacting with acid is
A. zinc
B. lead
C. iron
D. gold

Answer: D

Question. Which of the following metals does not react with water at all?
(I) Sodium (II) Copper (III) Aluminium (IV) Gold
A. I and III only
B. IV only
C. II and IV only
D. I, II, III and IV

Answer: C

III. Metals as we know, are very useful in all fields, industries in particular. Non-metals are no less in any way. Oxygen present in air is essential for breathing as well as for combustion. Non-metals form a large number of compounds which are extremely useful, e.g., ammonia, nitric acid, sulphuric acid, etc. Non-metals are found to exist in three states of matter. Only solid non-metals are expected to be hard however, they have low density and are brittle. They usually have low melting and boiling points and are poor conductors of electricity.

Question. ___________ is a non-metal but is lustrous
A. Phosphorus
B. Sulphur
C. Bromine
D. Iodine

Answer: D

Question. Which of the following is known as 'King of chemicals'?
A. Urea
B. Ammonia X
C. Sulphuric acid
D. Nitric acid

Answer: C

Question. Which of the following non-metals is a liquid?
A. Carbon
B. Bromine
C. Iodine
D. Sulphur

Answer: B

Question. Hydrogen is used
A. for the synthesis of ammonia
B. for the synthesis of methyl alcohol
C. nitrogenous fertilizers
D. all of the options

Answer: D

Question. Generally, non-metals are bad conductors of electricity but 'X' which is a form of carbon is a good conductor of electricity and is an exceptional non-metal. 'X 'is
A. diamond
B. graphite
C. coal
D. c o ke.

Answer: B

IV. When a silvery grey powder of a solid (A) is mixed with a powder of solid (B) no reaction occurs. But if the mixture is ignited and lighted using magnesium ribbon a reaction occurs with evolution of large amount of heat forming product (C) which settles down as liquid metal and the solid product(D) formed floats on the liquid (C). (C)in solid form reacts with moisture to form rust. The amount of heat generated during the reaction is so high that the reaction is used in welding of electric conductors, joints in railway tracks. Based on this information, answer the following questions.

Question. Identify A and C?
A. A- Al and C- Fe
B. A-Fe and C—Al
C. A-Mg and C -Al
D. A-Al and C -Cu

Answer: A

Question. Identify B and D which are oxides of
A. B- Fe , D- Al
B. B- Mg, D-Al
C. B- Al , D- Cu
D. B-Al , D -Fe

Answer: A

Question. Amphoteric oxides are
A. metal oxides which do not react with acids but react with bases
B. metal oxides which reacts with both acids as well as bases
C. metal oxides which reacts with acids but do not react with bases
D. metal oxides which shows no reaction with either acids or bases

Answer: B

Question. Which of the following is amphoteric in nature?
A. both aluminium oxide and zinc oxide
B. Only Zinc oxide
C. Only Aluminium oxide
D. Neither of them

Answer: A