The energy value of petrol can be determined by
Bomb calorimeter
Catalytic cracker
Fractionating column
Thermometer
Correct answer is C
Fractionating column contains petrol with different densities.
The basic particles from which matter could be made up of are as follow, except?
Salt
Atom
Ion
Molecule
Correct answer is A
Salt is a chemical used for varieties of purposes, so it’s not part of matter, Atom being the smallest part of molecule and ion are charge which are part of matter
The number of isomers formed by C6H14 is
4
5
2
3
Correct answer is B
The number of isomers C6H14 cm is 5. it will not form options A,C, D
In the above reaction, the oxidation number of Cu changes from ___ to _______?
+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