CHCl3 + Cl2 → HCl + CCl4. The reaction above is an example of?
an addition reaction
a substitution reaction
a chlorination reaction
a condensation reaction
Correct answer is B
No explanation has been provided for this answer.
Group 1 A metals are not found free in nature because they?
are of low melting and boiling points
have weak metallic bondingconduct electricity and heat
conduct electricity and heat
are very reactive
Correct answer is D
No explanation has been provided for this answer.
Which of the following compounds will impart a brick-red colour to a non-luminious bunsen flame?
NaCl
LiCl
CaCl2
MgCl2
Correct answer is C
No explanation has been provided for this answer.
In the extraction of iron in the blast furnace, limestone is used to?
release CO2 for the reaction
reduce the iron ore
increase the strenght of the iron
remove impurities
Correct answer is D
No explanation has been provided for this answer.
Ca2+
Mg2+
Zn2+
Cu2+
Correct answer is C
No explanation has been provided for this answer.