Elements of Group 16, 17 and 18

1. A.
   $\mathrm{HClO}$
2. B.
   $\mathrm{HOClO}$
3. C.
   $\mathrm{HClO_3}$
4. D.
   $\mathrm{HClO_4}$

Tap an option to check your answer.

1. A.
   $\mathrm{H_2S < H_2Se < H_2Te}$
2. B.
   $\mathrm{H_2Se < H_2S < H_2Te}$
3. C.
   $\mathrm{H_2Te < H_2S < H_2Se}$
4. D.
   $\mathrm{H_2Se < H_2Te < H_2S}$

Tap an option to check your answer.

1. A.
   $\mathrm{NO(g) + O_3(g) \longrightarrow NO_2(g) + O_2(g)}$
2. B.
   $\mathrm{2KI(aq) + H_2O(l) + O_3(g) \longrightarrow 2KOH(aq) + I_2(g) + O_2(g)}$
3. C.
   $\mathrm{H_2O_2(l) + O_3(g) \longrightarrow H_2O(l) + 2O_2(g)}$
4. D.
   $\mathrm{PbS(s) + 4O_3(g) \longrightarrow PbSO_4(s) + 4O_2(g)}$

Tap an option to check your answer.

1. A.
   O
2. B.
   S
3. C.
   Se
4. D.
   Te

Tap an option to check your answer.

1. A.
   $\mathrm{S}$
2. B.
   $\mathrm{Te}$
3. C.
   $\mathrm{Po}$
4. D.
   $\mathrm{At}$

Tap an option to check your answer.

1. A.
   Square planar
2. B.
   Trigonal bipyramidal
3. C.
   Distorted octahedral
4. D.
   Square pyramidal

Tap an option to check your answer.

1. A.
   $\mathrm{H_2S_2O_7}$
2. B.
   $\mathrm{H_2S_2O_8}$
3. C.
   $\mathrm{H_2S_2O_6}$
4. D.
   $\mathrm{H_2SO_5}$

Tap an option to check your answer.

1. A.
   $\mathrm{F}$
2. B.
   $\mathrm{Cl}$
3. C.
   $\mathrm{Br}$
4. D.
   $\mathrm{I}$

Tap an option to check your answer.

1. A.
   $2$
2. B.
   $3$
3. C.
   $6$
4. D.
   $8$

Tap an option to check your answer.

1. A.
   $F$
2. B.
   $Cl$
3. C.
   $Br$
4. D.
   $I$

Tap an option to check your answer.