10-minute Quiz : Chapter 11 Reactivity of metals

Which of the following metals would burn when it is heated (very) strongly in air?

(1) Zinc

(2) Lead

(3) Copper

• A. (1) only

• B. (2) only

• C. (1) and (3) only

• D. (2) and (3) only

Some experiments are carried out to study the reactivity of four metals, W, X, Y and Z. The results are tabulated. Lead may be

• A. W.

• B. X.

• C. Y.

• D. Z.

Both rubidium (Rb) and potassium (K) belong to the same group in the Periodic Table. Which of the following statements about rubidium is INCORRECT?

• A. Rubidium atoms lose electrons readily to form Rb⁺ ions.
• B. Rubidium is more reactive than potassium.
• C. Both rubidium and potassium become dull quickly when exposed to air.
• D. Rubidium can be obtained from its oxide by carbon reduction.

What would be observed when a small piece of aluminium is added to a test tube of dilute sulphuric acid?

(1) Colourless gas bubbles evolve.

(2) The test tube becomes warm.

(3) The small piece of aluminium dissolves to form a colourless solution.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

In an experiment, some zinc powder is heated strongly with copper(II) oxide on a heat-resistant mat. Which of the following observations can be made?

(1) The mixture glows after it is heated.

(2) Some yellow solid remains in the resultant mixture after cooling.

(3) Some reddish brown solid remains in the resultant mixture after cooling.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

Consider the following reactions:

X + ZnCl₂ → no reaction

X + 2AgCl → XCl₂ + 2Ag

• A. This means that X is less reactive than Zn and more reactive than Ag.

• B. This means that X is more reactive than Zn and less reactive than Ag.

The table shows the reactions of three metals with some salt solutions respectively. Which of the following correctly shows the three metals in order of decreasing reactivity?

• A. P, Q, R

• B. P, R, Q

• C. Q, R, P

• D. R, Q, P

E, F, G are three metals. G can displace F from a solution of nitrate of F. Oxides of F and G can be reduced by carbon but not for the oxide of E. Which of the following correctly shows the metals in increasing order of reactivity?

• A. F, G, E

• B. G, F, E

• C. E, F, G

• D. E, G, F

Consider the following information concerning metal X:

(1) X reacts with dilute hydrochloric acid.

(2) X forms an oxide with chemical formula XO.

(3) An atom of X has three occupied electron shells.

X may be

• A. lithium.

• B. sodium.

• C. magnesium.

• D. calcium.

Consider the following chemical equation:

xFe(s) + yO₂(g) → zFe₂O₃(s)

Which combinations, as shown in the image, is correct?

• A

• B

• C

• D