Steam changes the colour of anhydrous cobalt (ll) chloride from
white to red
blue to white
blue to pink
white to blue
Correct answer is C
No explanation has been provided for this answer.
The constituent of air that acts as a diluent is
nitrogen
carbon (IV) oxide
noble gases
oxygen
Correct answer is A
No explanation has been provided for this answer.
The bond formed between two elements with electron configurations 1s2 2s2 2p6 3s2 and 1s2 2s2 2p4 is
metallic
covalent
dative
ionic
Correct answer is D
No explanation has been provided for this answer.
Which of the following molecules is held together by hydrogen bond?
CH4
HBr
H2SO4
HF
Correct answer is D
No explanation has been provided for this answer.
The shape of the carbon (lV) oxide molecule is
pyramidal
linear
angular
tetrahedral
Correct answer is B
No explanation has been provided for this answer.