WorksheetsIs Matter Around Us Pure? (Class 9)
Total questions: 10
Worksheet time: 5mins
Which of these is a metalloid?
Bromine
Iron
Arsenic
Gold
Weight proportion of H2O is
1:7
1:4
1:9
1:8
Size of a particle in a suspension is
1 micrometre
1 nanometre
10 micrometres
Which type of elements donate electrons?
Metals
Non Metals
Metalloids
Which elements become liquid above room temperature?
i) Mercury,Bromine,Gallium,Cesium
ii) Gallium,Cesium,Antimony,germanium
iii) Gallium,Caesium,Rubidium,Francium
Only i)
Only ii)
Only iii)
None of the above
How would H2O be classified? Check all that apply.
Atom
Molecule
Compound
Brass is an alloy. It is a mixture of______
30% Zinc 70% copper
20% copper 80% nickel
40% iron 80% copper
35% gold 65% zinc
Which of the following will result in the formation of a mixture?
Crushing of marble tiles into smaller particles.
Breaking ice cubes into smaller pieces.
Adding sodium metal to water.
Adding milk in water.
concentration of 36g of NaCl in 100 g of water is
23%
26.47%
29.32%
21.11%
Two substances A and B when bought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. the substance C is:
A compound
An element
A mixture
None of the above
