21.
Avogadros number represents the number of atoms in
A
12g of C12
B
320g of sulphur
C
32g of oxygen
D
12.7g of iodine
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Avogadros number represents the number of atoms in
12g of C12
320g of sulphur
32g of oxygen
12.7g of iodine
Atomic mass of an elements is
the actual mass of one atom of the element
the relative mass of an atom of the element
the average relative mass of different atoms of the element
much different from the mass number of the element.
A symbol not only represents the name of the element but also represents
its atomicity
Reactivity.
its atomic no.
1 gm-atom
A sample of phosphrous trichloride() contains 1 .4 moles of the substance. how many atoms are there is the sample ?
5.6
4
molecules of at NTP will occupy a volume of
6.02 litres
6.02 mL
22.4 litres
2.24 litres
6 litres of oxygen at NTP is equivalent of
1/4 Mole
1/8 mole
1 mole
1/2 mole
6 litres of gas at N.T.P are found to have a mass of 11 g. The molecular mass of the gas is
88
32
22
44
0 litre of 0.4 M Contains
5.0 mole
2.0 moles
2.0 Mole Of
0.4 mole
5 moles of a gas in closed vessel was heated from 300 K to 600 K. the pressure of gas doubled The number of moles of the gas will be
10
20
5
2.5
4 litres of water vapour at NTP, when condensed to water, occupies an approximate volume of
1 mL
18 ml
18 litres
1 litre
0 g of oxygen contains number of atoms same as in
0.5 g of
12.3 g of Na.
4g of s
7g of nitrogen
2 moles of H atoms at NTP occupy a volume of
2 litres
22.4 litres
11.2 litres
44.8 litres
2 Litres of a gas at STP weighs 14g. The gas could not be
CO
2 litre of a gas at STP weighs 14 g. The gas could not be
CO
100 g caco3 is treated with I litre of 1N . What would be the weight of co2 libereted after the completion of the reaction ?
22g
33g
5.5 g
11g
224 L of gas at S.T.P is equivalent to
molecules
0.01 mol
1 mol
1g
Which one of the following statements is incorect ?
One mole of hydrogen contains Avogadros number of atoms
One mole of electrons stands for 6.02x1023 electrons
One gram atom of carbon contains avogadros number of atoms
One mole of oxygen gas contains Avogadros number of atoms