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Question-1
Law of definite proportions was devised by:
(A)
Joseph Proust
(B)
Rutherford
(C)
Lavoisier
(D)
Berzelins
Question-2
The halogen used in photography.
(A)
Chlorine
(B)
Fluorine
(C)
Iodine
(D)
Bromine
Question-3
The elements used in street lamp that gives an orange glow.
(A)
Rubidium
(B)
Potassium
(C)
Lithium
(D)
Sodium
Question-4
The silvery - white soft metal with a melting point of 97.86
o
C .
(A)
Sodium
(B)
Potassium
(C)
Rubidium
(D)
Thorium
Question-5
When ultra violet light is shown on halogen fluorine it glows weakly. This is called:
(A)
Phosphorescence
(B)
Chromatography
(C)
Diffusion
(D)
Fluorescence
Question-6
Alkaline earth metals are belongs to:
(A)
Group I
(B)
Group II
(C)
Group III
(D)
Group VII
Question-7
The yellow - green gas with a melting point of - 100.97
o
C is:
(A)
Bromine
(B)
Chlorine
(C)
Iodine
(D)
Astatine
Question-8
The columns of elements in the periodic table are called:
(A)
Periods
(B)
Class
(C)
Family
(D)
Groups
Question-9
Substances that cannot break down into simpler substances are called:
(A)
Compounds
(B)
Elements
(C)
Gas
(D)
Atoms
Question-10
Group VIII elements are called:
(A)
Alkali metals
(B)
Alkaline earth metals
(C)
Halogens
(D)
Transition metals
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Cambridge Secondary Grade 8
IGCSE
Practice in Related Chapters
Acid and Bases
The World of Matter
Simple Chemical Reactions
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Introducing Chemistry
Metals and Metal Compounds
Elements and Atoms
Separation of Mixtures
Compounds and Mixtures
Rocks and Weathering
Patterns of Reactivity
Chemistry and the Environment
Using Chemistry
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