Which law says that the matter is composed of discrete particles which do not break up during a chemical change?
Le chatlier Principles
Laws of chemical combination
Laws of conservation of mass
Huckel's law.
The species of an atom which possess different relative masses are called
Isotones
Isobars
Isotopes
Isoelectronic
Assuming fully decomposed, the volume of CO2 releases at STP on heating 9.85 g of BaCO3 (atomic mass, Ba = 137) will be
1.12 L
0.84 L
2.24 L
4.96 L
The maximum number of molecules are present in
15 L of H2 gas at STP
5 L of N2 gas at STP
0.5 g of H2 gas
10 g of O2 gas
Certain species of atoms of different elements having identical relative masses are called
isotones
isobars
isotopes
isoelectronic
One litre hard water contains 12.00 mg Mg2+ . Milliequivalents of washing soda required to remove its hardness is
1
12.16
1 x 10 -3
12.16 x 10 -3
Specific volume of cylindrical virus particle is , whose radius and length are respectively. If , find molecular weight of virus.
15.4 kg/mol
1 cc N2 O at NTP contains
All of the above
A metal oxide has the formula Z2 O3 . It can be reduced by hydrogen to give free metal and water. 0.1596g of the metal oxide requires 6 mg of hydrogen for complete reduction. The atomic weight of the metal is
27.9
159.6
79.8
55.8
Liquid benzene (C6H6) burns in oxygen according to the equationHow many litres of O2 at STP are needed to complete the combustion of 39 g of liquid benzene ?(Mol wt O2 = 32, C6H6 = 78)
74 L
11.2 L
22.4 L
84 L