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WorksheetsBasic concepts of chemistry
Total questions: 20
Worksheet time: 5mins
Calculate the molecular mass of acetone (CH3COCH3 )
46 g mol-1
64 g mol-1
58 g mol-1
------- is considered as standard for atomic mass.
6C12
7C12
6C13
1 mole = ?
60.23 x 1023
6.23 x 1023
6.023 x 1023
Volume occupied by 1 mole of any gaseous substance at 273 K and 1 bar pressure is ------
22.71 litres
22.4 litres
24.5 litres
Equivalent mass of a reducing agent = Molar mass of reducing agent / ?
no.of electrons gained by 1 mole
no.of electrons lost by 1 mole
What is the molecular formula of Lactic acid ( Empirical formula CH2O ) if n=3,
CH2O
C4H6O6
C3H6O3
mass / molar mass = number of moles (n)
true
false
n x mass(m) = molar mass
true
false
nx molar mass = mass(m)
true
false
volume / 22.4 litres = n (no of moles)
true
false
n x 22.4 litres = volume
true
false
calculate X from the following expression
3 moles of hydrogen produces 2 moles of ammonia,
then how much of
X moles of hydrogen will produce 10 moles of ammonia
3/5 moles of hydrogen
10 moles of hydrogen
15 moles of hydrogen
Oxidation is -----
gain of electrons
loss of electrons
Reduction is -----
gain of electrons
loss of electrons
Reduction is -----
addition of oxygen and removal of hydrogen
addition of hydrogen and removal of oxygen
Oxidation is -----
addition of oxygen and removal of hydrogen
addition of hydrogen and removal of oxygen
Oxidation no. of a free element is ----
0
1
+1
Oxidation no. of hydrogen is ----
0
+1
-1
Oxidation no. of Flourine is ----
0
+1
-1
Oxidation no. of alkaline earth metals is ----
+1
-1
-2
+2
