A yellow precipitate of Cr(OH)3 is formed
An orange precipitate of Cr(OH)3 is formed
The colour changes from orange to yellow
The colour changes from yellow to orange
There is no visible reaction.
Correct answer is C
No explanation has been provided for this answer.
What is the IUPAC name of CH3CCI=C(CH3)2?
2-chloro -3 methylbut -2yne
2 -chloro -3 methylbut -2ene
2 -chloro -3 methylbutene
3- methyl -2-chlorobut -2-ene
3- methyl -2. chlorobut -2 yne
Correct answer is B
No explanation has been provided for this answer.
Which formula is used to indicate the degree of acidity of an acid?
\( [H^+] = ^{\text{mass of acid relative}} molecular mass of acid \)
F = number of H+ = ions x molar mass of the acid
Kw = [H+][OH-]
pH = - log10[H+]
pKa = -log10Ka
Correct answer is D
No explanation has been provided for this answer.
CH3CH2CHO
CH3CH2CH2OH
CH3CH2COQH
CH3CH20CH
CH3CH3OH
Correct answer is B
No explanation has been provided for this answer.
A calcium atom and a calcium ion have the same
chemical properties
electric charge
electronic structure
number of electrons
number of neutrons
Correct answer is E
No explanation has been provided for this answer.