Identify the most reactive and least reactive metal

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Reference no: EM133059232

Metals And Non-Metals

ASSIGNMENT-1

MULTIPLE CHOICE QUESTIONS:

Question 1. Which of the following properties is not a characteristic of metals?
(A) Metallic lusture (B) High density
(C) Hardness (D) Low melting and boiling point

Question 2. Which of the following metals generally occur in liquid sate ?
(A) Mercury (B) Bromine (C) Gallium (D) A & C both

Question 3. Reactivity of zinc is than hydrogen.
(A) less (B) more
(C) equal (D) sometimes more sometimes less

Question 4. Zn + xHCI → ZnCI₂ + Z,

In above equation A & x are
(A) H₂, 2 (B) CI₂, 1 (C) H₂, 3 (D) H₂, 4

Question 5. When sodium reacts with cold water, then the product formed will be-
(A) Na₂O (B) NaOH (C) Na₂CO₃ (D) All of these

Question 6. What is the decreasing order of reactivity of following metals ?
Na, Al, Cu, Ag, Fe
(A) Na > K > AI > Cu > Ag > Fe (B) K > Na > AI > Cu > Fe > Ag
(C) K > Na > AI > Fe > Cu > Ag (D) K > Na > AI > Fe > Ag > Cu

Question 7. When a metal is added to dilute HCI solution, there is no evolution of gas. Metals if -
(A) K (B) Na (C) Ag (D) Zn

Question 8. On addition of which metal, copper sulphate solution (Blue colour) will be changed to colourless solution >
(A) Fe (B) Ag (C) Zn (D) Hg

Question 9. Zn + H₂O (Steam) → A + B

In the above equation (A) and (B) are

(A) Zn & H₃ (B) ZnH₂ & O₂ (C) ZnO₂ & O₂ (D) ZnO & H₂

Question 10. Which of the following metals reacts vigorously with oxygen?
(A) Zinc (B) Magnesium (C) Sodium (D) Copper

SUBJECTVE QUESTIONS:

Question 1. Describe the physical properties of metals >

Question 2. Write the chemical equation of chemical reaction of zinc metal with the following -
(a) H₂SO₄ (b) H₂O (c) O₂

Question 3. What is an activity series of metals ? Arrange the metals Zn, Mg. AI, Cu and Fe in the decreasing order of reactivity.

Question 4. What would you observe when you put :
(i) some zinc pieces in the blue copper sulphate solution ?
(ii) some copper pieces in green ferrous sulphate solution ?

Question 5. Name two metals which occur in nature in the free state.

Question 6. Identify the most reactive and least reactive metal from the following - Hg, Na, Fe, Ag.

Question 7. Name a gas which is always produced when a reactive metal reacts with a dulute acid. Write a chemical equation supporting your answer.

Reference no: EM133059232

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