Cu and Mg
Cu and Sn
Cu and Zn
Cu and Pb
Correct answer is B
Bronze is an alloy consisting primarily of copper, tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.
Which of the following materials is classified as a non-biodegradable pollutant?
Animal hide
Paper
Plastic
Wood
Correct answer is C
No explanation has been provided for this answer.
Which of the following statements about fine chemical is correct? It
is injurious to health
has low degree of purity
is produced in relatively small amount
can be stored for a long time
Correct answer is C
No explanation has been provided for this answer.
Which of the following raw materials is used in a plastic industry?
Ethene
Methane
Calcium
Hydrogen
Correct answer is A
No explanation has been provided for this answer.
The main function of limestone in the blast furnace is to
act as catalyst
act as reducing agent
remove impurity
supply carbon (IV) oxide
Correct answer is C
No explanation has been provided for this answer.