WorksheetsRevision 1
Total questions: 20
Worksheet time: 19mins
1. NO and NO2 are two oxides of nitrogen which law of chemical combination is illustrated here
Law of Conservation of Mass
Law of Constant Composition
Avogadro’s Law
Law of Multiple Proportions
3g hydrogen reacts with 30g of oxygen to yield H2O. Which is the Limiting Reagent.
Water
Hydrogen
Oxygen
None of the above
Number of moles in 11.2L of CO2 at STP
0.05
0.5
2
1.5
Number of molecules in 170g NH3
0.1 x 6.022 x 1023
1 x 6.022 x 1023
10 x 6.022 x 1023
None of the above
1 amu =
6.022 x 1023g
1.66056 x 10-24g
1.66056 x 1024g
6.022 x 10-23g
The mass of 11.2L of NH3 gas at STP
8.5g
85g
17g
1.7g
Excess nitrate in drinking water can cause
Methemoglobinemia
Kidney Damage
Liver Damage
Laxative Effect
Pick out the correct statement
Classical smog has oxidizing character while photochemical smog is reducing in nature.
Photochemical smog occurs in day time whereas classical smog occurs in early hours.
During the formation of smog level of ozone in the atmosphere goes down.
All of the above
In Antartica, ozone depletion is due to the formation of the compound
Acrolein
Peroxy acetyl nitrate
Formaldehyde
Chlorine nitrate
Irrespective of the source, pure sample of water always yield 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the Law of
Conservation of Mass
Constant Composition
Multiple Proportions
Constant Volume
A compound contains 4.07% Hydrogen 24.27% Carbon and 71.65% Chlorine. Its molar mass is 98.96g. What are its Empirical Formula and Molecular Formula.
C2H4Cl2, C2H4Cl2
CH2Cl, CH2Cl
CH2Cl, C2H4Cl2
CHCl, C2H2Cl2
Water softening by Clark’s process uses
Calcium bicarbonate
Sodium bicarbonate
Sodium aluminate
Calcium hydroxide
Water gas is a mixture of
CO + H2
CO2 + H2
CO + H2O
CO2 + H2O
Which of the following Hydrides can act as a Lewis Base
HCl
CH4
NH3
B2H6
Calgon is chemically
Sodium aluminium silicate
Sodium hexa meta phosphate
Calcium hexa meta phosphate
Calcium aluminium silicate
Which of the following is not used for removing permanent hardness of water
Clark’s Method
Calgon’s Method
Permutit Process
Synthetic resin method
The radioactive isotope of hydrogen is
Protium
Deuterium
Tritium
None of the above
An example of Saline hydride
HCl
KH
SiH4
B2H6
Which of the following does not cause hardness of water
CaCO3
Ca(HCO3)2
CaCl2
CaSO4
30% solution of H2O2 is known as
10 volume H2O2
100 volume H2O2
1000 volume H2O2
30 volume H2O2
