A pure substance which is made up of only one kind of atom and cannot be broken into two or more simpler substances by physical or chemical means is referred to as
Anonymous Quiz
16%
a compound
59%
an element
19%
a molecule
6%
a mixture
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Which of the following non-metal is a good conductor of electricity?
Anonymous Quiz
20%
Aluminium
13%
Silicon
59%
Graphite
9%
Gold
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Which of the following property does not describe a compound?
Anonymous Quiz
16%
It is composed of two or more elements
31%
It is a pure substance.
22%
It cannot be separated into constituents by physical means
31%
It is mixed in any proportion by mass
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When two liquids do not mix, they form two separate layers and are known as
Anonymous Quiz
13%
Miscible liquids
59%
Immiscible liquids
19%
Saturated liquids
9%
Super saturated liquids
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How one can separate ammonium chloride from a mixture containing ammonium chloride and sodium chloride?
Anonymous Quiz
17%
Precipitation
43%
Sublimation
23%
Chromatography
18%
Cetrifugation
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The amount of solute present per unit volume or per unit mass of the solution/solvent is known as
Anonymous Quiz
19%
Composition of solute
32%
Concentration of a solvent
21%
Concentration of a solute
28%
Concentration of a solution
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According to the definition of pure substance, which of the following is a pure substance?
Anonymous Quiz
14%
Ice
23%
Mercury
13%
Iron
49%
All of these
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Which of the following properties does not describe a compound?
Anonymous Quiz
12%
It is composed of two or more elements
28%
It is a pure substance.
23%
It cannot be separated into constituents by physical means
37%
It is mixed in any proportion by mass
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In the tincture of iodine, find the solute and solvent?
Anonymous Quiz
24%
alcohol is the solute and iodine is the solvent
50%
iodine is the solute and alcohol is the solvent
15%
any component can be considered as solute or solvent
11%
tincture of iodine is not a solution
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Which of the following is not a homogeneous mixture?
Anonymous Quiz
26%
Air
32%
Tincture of iodine
18%
Sugar solution
23%
milk
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Which of the following correctly represents 360g of water?
(i) 2 moles of water (ii) 20 moles of water (iii) 6.022 × 1023 molecules of water (iv) 1.2044 × 1025 molecules of water
(i) 2 moles of water (ii) 20 moles of water (iii) 6.022 × 1023 molecules of water (iv) 1.2044 × 1025 molecules of water
Anonymous Quiz
16%
(i)
33%
(i) and (iv)
37%
(ii) and (iii)
14%
(ii) and (iv)
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Which of the following statements is not true about an atom?
Anonymous Quiz
36%
Atoms are not able to exist independently.
21%
Atoms are the basic units from which molecules and ions are formed.
26%
Atoms are always neutral in nature.
17%
Atoms aggregate in large numbers to form the matter that we can see, feel or touch.
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1 u or 1 amu means
Anonymous Quiz
59%
1/12th mass of C-12 atoms
21%
Mass of C-12 atom
10%
Mass of O-16 atom
9%
Mass of Hydrogen molecule
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Which of the following contains maximum number of molecules?
Anonymous Quiz
44%
19 CO2
19%
1 g N2
18%
1 g H2
19%
1 g CH4
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