question_answer4)
Write
dispersed phase and dispersed medium of emulsion.
question_answer5)
How
many elements are known to us till today?
question_answer6)
Give
two examples of suspension.
question_answer7)
Why
particles in a true solution cannot be seen with naked eyes?
question_answer9)
How
will you justify that rusting of iron is a chemical change?
question_answer10)
Give
one test to show that brass is a mixture and not a compound.
question_answer12)
How
many elements are naturally occurring?
question_answer14)
Which
type of solution is formed when milk and water is mixed uniformly?
question_answer15)
Name
the process used to obtain pure copper sulphate from impure sample.
question_answer16)
Write
one property of colloids.
question_answer17)
Which
method is mostly used for the purification of solids?
question_answer18)
Name
two metals which exist as liquids above 30°C.
question_answer23)
Why
silicon and germanium are metalloid?
question_answer24)
What
is fractionating column?
question_answer25)
How
can you separate particles of colloidal solution? Name the process.
question_answer26)
What
is meant by man-made elements?
question_answer27)
Which
non-metal is liquid at room temperature?
question_answer28)
Which
metal is liquid?
question_answer36)
Tincture
of iodine has antiseptic properties. How it is prepared?
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