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.