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WorksheetsExploring the World of Chemistry
Total questions: 23
Worksheet time: 54mins
What is the chemical symbol for water?
H2O3
O2H
H2O2
H2O
What are the three states of matter?
plasma, vapor, foam
solid, liquid, gas
solid, liquid, plasma
gas, liquid, crystal
What is the process of a solid turning into a liquid called?
Freezing
Melting
Condensation
Sublimation
What is an element?
An element is a pure substance made of only one type of atom.
An element is a type of molecule made of two or more atoms.
An element is a mixture of different atoms.
An element can be broken down into simpler substances.
The most abundant metal present in the earth's crust:
A metal with melting point less than 50 C is: -
A metalloid used to make glass is :-
The colour of rust which is hydrated oxide of iron is :-
Name a metal which is: -
(i) Brittle
(ii) the best conductor of electricity
Copper for conductor of electricity
Gold for best conductor of electricity and aluminium for brittle
A metal which is neither ductile nor malleable is: -
Name the metals present in the following: -
1. Brass
2. Duralumin
3. Bronze
4. Stainless steel
Choose odd one out : -
Sulphur, phosphorus, carbon and bromine
Phosphorus
Sulphur
carbon
Give one difference between metals and non metals with reference to their : -
1. Melting and boiling point
2. Malleability
3. Solubility in water
4. Conductivity of heat and electricity
Give reason :-
Gold is mixed with copper and and nickel
What are metalloids?
What is rusting?
A metal stored in kerosene oil is ..
Why aluminium is used in making aircrafts?
A non metal which is liquid at room temperature (a)
State the conditions for rusting.
Write the abbreviation of DDT: -
Give uses of : -
1. Antimony
2. Silicon
Why graphite is used in the leads of pencils?
