The pollutants that are likely to be present in an industrial environment are?
H2S,SO2 and oxides of nitrogen
NH3, HCI and CO
CO2, NH3 and H2S
dust, NO and CI2
Correct answer is A
No explanation has been provided for this answer.
147N + X → 178O + 11 H. In the above reaction, X is a?
neutron
helium atom
litgium atom
deuterium atom
Correct answer is B
No explanation has been provided for this answer.
How many lone pairs of electron are there on the central atom of the H2O molecules?
1
2
3
4
Correct answer is B
In a water molecule, oxygen is bonded to two hydrogen atoms. Leaving oxygen with four electrons which pair up with one another to form two lone pairs of electrons.
The nucleus of the isotope tritium, contains?
two neutrons with no protons
one neutron and one protons
two neutrons and one proton
two neutrons, one proton and one electron
Correct answer is C
No explanation has been provided for this answer.
number of molecules of the gas
density of the gas molecules
number of collisions between the gas molecules
number of collisions between the gas molecules and the walls of the container
Correct answer is D
No explanation has been provided for this answer.