ICSE/ISC Std 8 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
Which one displaces bromine from bromides and iodine from iodides?

(A) Chlorine	(B) Oxygen
(C) Sulphur	(D) Phosphorous

Question-2
Moderately active metals from their oxide can be obtained by

(A) heating with carbon	(B) heating with aluminium
(C) electrolytic method	(D) strong heating

Question-3
Metals have

(A) Different colours	(B) Softness
(C) High tensile strength	(D) Different physical states

Question-4 _____________ is used for thermometers and barometers.

(A) iron	(B)silver
(C)Mercury	(D)platinum

Question-5
The naturally occurring compounds of metal mixed with earthly materials are called

(A) Ores	(B) Minerals
(C) Free metals	(D) Complexes

Question-6
At room temperature,sulphur and phosphorous are

(A) Solids	(B) Liquids
(C) Gases	(D) Colloids

Question-7 The process of heating an ore strongly below its melting point in the presence of an excess of air is called_______________________.

(A) leaching	(B)roasting
(C)calcination	(D)froth flotation method

Question-8
Phosphorous reacts with oxygen to give

(A) Acidic oxide	(B) Basic oxide
(C) Neutral oxide	(D) Peroxides

Question-9
Which is the most important ore of iron?

(A) haematite(Fe₂O₃)	(B) Magnetite(Fe₃O₄)
(C) Limonite(Fe₂O₃.3H₂O)	(D) Siderite(FeCO₃)

Question-10
Which is used for making cutlery,utensile,ornamental pieces and some other instrument and apparatus?

(A) Steel	(B) Stainless steel
(C) Alnico	(D) Nichrome

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Std 8

ICSE/ISC

Practice in Related Chapters
Hydrogen
Structure of Atom
Transformation of Substances
Metals and nonmetals
Carbon and its Compounds