Which one is not an example of alloy?
a) brass
b) steel
c) iron
d) bronze
The of nitrogen in air is…….
a) 35%
b) 78%
c) 87%
d) 21%
The maximum amount of solute that can be dissolved in a solvent at specific temperature is called……..
a) solubility
b) solution
c) concentration
d) mixture
Which of the following is the property of mixtures?
a) the substances lose their original properties
b) the substances are mixed in a fixed amount
c) the substances can separated by physical methods
d) only one type of substance is mixed
The solid particles which are left on filter paper while filtration are called…….
a) residue
b) filtrate
c) solvent
d) solute
Air is a mixture of different gases. This combination is an example of ……..
a) chemical combination
b) no chemical combination
c) no physical combination
d) both chemical and physical combination
