Which of the following acids is dibasic?
Hydrochloric acid
Trioxosulphate (IV) acid
Dioxonitrate (lll) acid
Ethanoic acid
Correct answer is B
No explanation has been provided for this answer.
Which of the following quantities is the same for one mole of Br2(l) and one mole of He(g)?
Number of molecules
Number of atoms
Total mass of the particles
Volume occupied at s.t.p
Correct answer is A
No explanation has been provided for this answer.
Which of the following statements about dative bonding is not correct?
there is sharing of electrons
one atom must possess a lone pair electrons
each participating atom contributes one electron
it can be formed between molecules
Correct answer is C
No explanation has been provided for this answer.
X2Y5
X2Y3
XY3
XY2
Correct answer is D
Element X has a valency of 2 while Y has a valency of 1,
so they exchange valency to form \( XY_2\)
Group O of elements are unreactive because
their outmost shells contain equal number of electrons
their highest occupied enegy level is full
they are monatomic gases
they are non-metals
Correct answer is B
No explanation has been provided for this answer.