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WorksheetsAtoms and Molecules/ Structure of Atom
Total questions: 15
Worksheet time: 12mins
The chemical formula of Bismuth Phosphate is
Bi2(PO4)3
BiPO4
Bi3PO4
Bi(PO4)3
Number of atoms of O in 34 gram H2O2 is
(Given: O = 16 u, H = 1 u)
NA
2 NA
3 NA
4 NA
There are -------------- periods and -------------- groups in the modern periodic table.
18 periods and 7 groups
17 periods and 8 groups
7 periods and 18 groups
8 periods and 17 groups
How many moles of H atoms are present in 3.011 x 1023 molecules of ammonia (NH3)?
0.5
1
1.5
2
The atomicity of rhombic sulfur is
1
2
4
8
Which of the following is a neutral oxide?
CO2
N2O5
Al2O3
CO
The number of electrons present in the 'L' shell of O is
3
4
5
6
The volume of an atom is 10y times the volume of nucleus. Then y is -------------
5
10
15
20
The magnitude of charge to mass ratio of cathode rays is --------------
constant
variable
1.76 x 1011 C/kg
Both (A) and (C)
The valency of the halogen present in second period is --------------------
1
3
5
7
Element with atomic number 104 was discovered simultaneously by the Americans and Russians. The Russian scientists proposed the name 'Kurchatovium' and the American scientists suggested the name 'Rutherfordium' for the new element. In such a dispute, which organization they should go to:
International Court of Justice
Royal Society of Chemistry
International Union of Pure and Applied Chemistry
Association of Chemistry Teachers
The Latin name for 'Lead' is
Stibium
Plumbum
Wolfram
Hydrargyrum
The molar mass of Laughing gas is
44 g/mol
44 u
56 g/mol
56 u
Which of the following is a poor conductor of electricity?
NaCl(s)
Graphite
Iron
Copper
Which of the following is not a postulate of Dalton's Atomic Theory?
All matter is made of very tiny particles called atoms.
Atoms combine in the ratio of small whole numbers to form compounds.
Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.
An atom as a whole is electrically neutral because the negative and positive charges are equal in magnitude
