Chapter 3rd Metal And Non Metals For MP Super 100

Q1) Which of the following oxides of iron would be obtained on the prolonged reaction of iron with steam?

a) FeO

b) Fe₂O₃

c) Fe₃O₄

d) Fe₂O₃ and Fe₃O₄

Correct Answer: Option (c)

Q2) A non-metal used to preserve food material is:

a) Carbon

b) Phosphorus

c) Sulphur

d) Nitrogen

Correct Answer: Option (d)

Q3) The arrangement for Copper, Tin, Lead and Mercury, according to the reactivity series, is:

a) Tin> Lead> Copper> Mercury

b) Lead> Copper> Mercury> Tin

c) Copper> Mercury> Tin> Lead

d) Mercury> Tin> Lead> Copper

Correct Answer: Option (a)

Q4) The metals that float when treated with water are:

a) Manganese and sodium

b) Sodium and calcium

c) Magnesium and sodium

d) Magnesium and calcium

Correct Answer: Option (d)

Q5) Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

(i) Good thermal conductivity

(ii) Good electrical conductivity

(iii) Ductility

(iv) High melting point

a) (i) and (ii)

b) (i) and (iii)

c) (ii) and (iii)

d) (i) and (iv)

Correct Answer: Option (d)

Q6) When hydrochloric acid is added to barium hydroxide, a white-coloured compound is formed. Which of the following option gives the complete chemical reaction?

a) HCl + Ba(OH)₂ → BaCl₂ + 2HOH

b) 2HCl + Ba(OH)₂ → BaCl₂ + 2HOH

c) 2HCl + Ba(OH)₂ → BaH₂ + 2HCl + O₂

d) HCl + 2Ba(OH) → 2BaCl₂ + 2HOH + O₂

Correct Answer: Option (b)

Q7) What happens when a pellet of sodium is dropped in water?

(a) It catches fire and forms oxide

(b) It absorbs heat and forms oxide

(c) It catches fire and forms hydroxide

(d) It absorbs heat and forms hydroxide

Correct Answer: Option (c)

Q8) The chemical reaction between a piece of copper and nitric acid is given by the chemical equations,

Cu + HNO₃ → Cu(NO₃)₂ + H₂

H₂ + HNO₃ → H₂O + NO₂

What can be inferred from the chemical equation?

a) Copper causes the oxidation of HNO₃ to form NO₂

b) Hydrogen gas gets oxidised by HNO₃ to form water

c) Gas reacts with oxygen in the air to form water

d) Nitrate reacts with hydrogen to form NO₂ and H₂O

Correct Answer: Option (b)

Q9) Which of the following options gives the process of extraction of mercury from its ore cinnabar?

(a) Cooling cinnabar in the presence of excess air

(b) Cooling cinnabar to convert it into mercuric oxide and then heating it

(c) Cinnabar to convert it into mercuric oxide and then heating it again

(d) Cinnabar in the presence of limited air, and then adding a small amount of water

Correct Answer: Option (c)

Q10) The image shows the electrolytic refining of copper.

Which of the following options explains the process of obtaining pure copper?

(a) When current is passed, pure copper from the anode deposits to the cathode.

(b) When current is passed, pure copper from the anode deposits in the electrolytic solution.

(c) When current is passed, pure copper from the electrolytic solution deposits at the anode.

(d) When current is passed, pure copper from the electrolytic solution deposits at the cathode.

Correct Answer: Option (d)

Q11) 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 H₂

(b) Ca and H₂O₂

(c) Ca(OH)₂

(d) CaH₂

Correct Answer: Option (c)

Q12) A student studying the chemical properties of metals finds incomplete chemical reactions in his book, as shown below:

MgO + HNO₃ →

Which option completes the reaction?

(a) MgO + HNO₃ → Mg₃N₂ + 4H₂O

(b) MgO + HNO₃ → Mg + NO₂ + O₂

(c) MgO + HNO₃ → Mg(OH)₂ + 2NO₂

(d) MgO + HNO₃ → Mg(NO₃)₂ + H₂O

Correct Answer: Option (d)

Q13) Which of the following can undergo a chemical reaction?

a) MgSO₄ + Fe

b) ZnSO₄ + Fe

c) MgSO₄ + Pb

d) CuSO₄ + Fe

Correct Answer: Option (d)

Q14) Pick the statement which is correct about the non-metal.

a) Br is an example of a liquid non-metal.

b) Graphite is a good conductor of electricity

c) Most of the non-metal oxides are acidic

d) All of these

Correct Answer: Option (d)

Q15) A student wrote two incomplete chemical reactions:

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)

Correct Answer: Option (c)

Q16) When a non-metal is allowed to react with water:

a) CO₂ gas is formed

b) H2 gas is formed

c) Product formed depends on the temperature

d) No products are formed

Correct Answer: Option (d)

Q17) Aqua regia is a freshly prepared mixture of concentrated HNO3 and concentrated HCl in the ratio of:

a) 1:3, respectively

b) 2:3, respectively

c) 3:1, respectively

d) 3:2, respectively

Correct Answer: Option (a)