+1 to 0
0 to +2
+2 to +1
0 to +1
Correct answer is A
The oxidation number is from +1 to O as a result of the release of sulphur. Options B, C, and D are not the actual oxidation number for copper
All these are electromagnetic waves except
White light
Photon
X-ray
Infrared
Correct answer is B
Photon is unit of energy that carries light and has zero mass A, C and D are all electromagnetic waves of higher mass
Which of these radioactive elements is commonly used as a nuclear fuel
uranium
palladium
actium
thorium
Correct answer is A
Uranium is common nuclear because of its less stability as a result has a great tendency to increase energy than. Options B,C,D which are not stable
A major source of oxide of nitrogen is from the burning of
coal
wood
fuel
chlorofluorocarbons
Correct answer is C
No explanation has been provided for this answer.
Rare gases are stable because they
are monoatomic
form ions easily
have duplet or octet electronic configuration in the outermost shells in their atoms
are volatile gases
Correct answer is C
Rare gases are stable because they have duplet or octet electronic configurations in the outermost shells in their atoms, as a result they don’t go into solution easily. option A, B, Dare not because they go into solution easily (unstable)