What is the general trend in reactivity of the S-block elements as you move down the group?
Anonymous Quiz
23%
Reactivity decreases
37%
Reactivity increases
26%
Reactivity remains constant
15%
Reactivity becomes unpredictable
H3PO₂ is the molecular formula of an acid of phosphorus. Its name and basicity respectively are
Anonymous Quiz
29%
phosphorous acid and two
39%
hypophosphorous acid and two
20%
hypophosphorous acid and one
12%
hypophosphoric acid and two.
Which one of the following substance is used in the
laboratory for fast drying of neutral gases?
laboratory for fast drying of neutral gases?
Anonymous Quiz
35%
Phosphorus pentoxide
40%
Active charcoal
26%
Anhydrous calcium chloride
P₂O5 is heated with water to give
Anonymous Quiz
25%
hypophosphorous acid
37%
phosphorous acid
23%
hypophosphoric acid
15%
orthophosphoric acid
When orthophosphoric acid is heated to 600°C, the product formed is
Anonymous Quiz
23%
PH3
34%
P₂O5
33%
H3PO3
10%
HPO3
Which is the correct thermal stability order for H₂E
(E = O, S, Se, Te and Po)?
(E = O, S, Se, Te and Po)?
Anonymous Quiz
22%
H₂Se <H₂Te <H₂Po <H₂O <H₂S
35%
H₂S <H₂O <H₂Se <H₂Te <H₂Po
34%
H₂O <H₂S <H₂Se <H₂Te <H₂Po
9%
H₂Po <H₂Te <H₂Se <H₂S <H₂O
Acidity of diprotic acids in aqueous solutions
increases in the order
increases in the order
Anonymous Quiz
30%
H₂S <H₂Se <H₂Te
34%
H₂Se <H₂S <H₂Te
26%
H₂Te <H₂S <H₂Se
10%
H₂Se <H₂Te <H₂S
Which of the following bonds has the highest energy?
Anonymous Quiz
20%
S-S
34%
Se-Se
39%
O-O
8%
Te-Te
Which of the following does not give oxygen on heating
Anonymous Quiz
27%
K₂Cr₂O7
35%
(NH4)₂Cr₂O7
22%
KClO3
17%
Zn(ClO3)2
Which would quickly absorb oxygen?
Anonymous Quiz
31%
Alkaline solution of pyrogallol
28%
Conc. H₂SO4
29%
Lime water
12%
Alkaline solution of CuSO4
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