Metals and Nonmetals Objectives. [Extra]

01.

Find Odd one out:
Gold
Silver
Aluminium
Sodium
Mercury

02.
Name the following: Soft Metals

03.
Fill in the Blank: Gold is most ________. 1 gram can be drawn into wire of 2km length

04.
Name the following: The property of metals by virtue of which it can me made into
thin sheets

05.
Name the following: The property of metals by virtue of which it produce sound on
striking

06.
Name the following: A liquid non-metal

07.
Name the following: A hardest known non-metal

08.
Name the following: A non-metal with Lustre

09.
Fill in the Blank: Metals react with Oxygen to form _________ with different reactivity

10.
Metals react with water to evolve _________ gas
(a) Carbon dioxide
(b) Hydrogen
(c) Chlorine
(d) Sulphur Dioxide

11.
Fill in the Blank: Na, K has to be kept in kerosene oil because they are _________.

12.
True or False: Aluminium develops thin oxide layer when exposed to air

13.
Fill in the Blank: ________ does not react with oxygen at room temperature, but
burns in air on heating

14.
Name the following: The process of forming a thick oxide layer of Aluminium. Thick
oxide layer provides improved resistance to corrosion.

15.
Fill in the Blank: Metals react with Acid to give ______ and hydrogen gas

16.
______ can be achieved by putting suitable dyes in electrolyte bath, while anodising.
(a) Pigmentation
(b) Colouring
(c) Decoration
(d) Etching

17.
Name the following: Metal oxides are usually basic in nature, but some metal oxides
like Aluminium oxide and zinc oxide react with both acids as well as bases. They
are called ____

18.
Na, K reacts vigorously with water. Hydrogen released catches fire. This is __________
reaction
(a) Nuclear
(b) Thermal
(c) Exothermic
(d) Chemical

19.
Fill in the Blank: Magnesium reacts with hot water to form magnesium hydroxide.
Also bubbles of _______ gas sticks to its surface and magnesium starts floating

20.
Fill in the Blank: Metals like Copper (Cu), Silver (Ag) and _______ do not react with water at all

21.
Reaction of Metals with metal salt solution is a _________ reaction
(a) Combination
(b) Displacement
(c) Double Displacement
(d) Decomposition

22.
Fill in the Blank: Reaction of metals with other metal salts is a ___________ Reaction.
A more reactive metal can displace a less active metal from its compound in a solution
Metal (A) + Salt Solution (B) ? Salt Solution (A) + Metal (B)

23.
Name the following: Compounds formed by transfer of electrons from a metal to a
non-metal

24.
Name the following: Compounds formed by mutual sharing of one or more pairs of electrons
between two combining atoms

25.
Fill in the Blank: Ionic compounds are _________ due to strong force of attraction
between cations & anions

26.
True or False: Ionic compounds have high melting & boiling points because more energy
is required to overcome strong inter-molecular attraction

27.
True or False: Ionic compounds conduct electricity in solid state
due to their rigid structure}

28.
Name the following: The naturally occurring compounds of metals along with other
impurities

29.
Fill in the Blank: The impurities in an ore is called ______. Ex: soil, sand, rock
material

30.
Name the following: An Aluminium Ore

Answers:

01. Mercury { Rest all are solid metals }
02. Sodium or Potassium
03. ductile
04. Malleability
05. Sonorous
06. Bromine
07. Carbon (in form of Diamond)
08. Iodine
09. metal oxide
10. (b) Hydrogen
11. Most reactive
12. True
13. Magnesium
14. Anodising
15. Salt
16. (a) Pigmentation
17. Amphoteric Oxides
18. (c) Exothermic
19. hydrogen
20. Gold (Au)
21. (b) Displacement
22. Displacement
23. Ionic (or Electrovalent) Compounds
24. Covalent Compounds
25. Solid, Hard
26. True
27. False {They do not conduct electricity because movement of electrons are not possible
28. Minerals
29. Gangue
30. Bauxite (Al2O3.H2O)