Oxyacids of Sulphur

Q.

Peroxy acids of sulphur are:

1. $H_{2}S{O}_5$

2. $H_2{S}_2{O}_7$

3. $H_2{S}_2{O}_3$

4. $H_2{S}_2{O}_8$

Q. Some examples of organic acids are $\mathrm{HCl},H_2{\mathrm{SO}}_4\mathrm{and}{\mathrm{HNO}}_3$.

1. True
2. False

Q.

Borax is actually made of two tetrahedra and two triangular units joined together and should be written as: Na2[B4O5(OH)4]·8H2O

The correct statement/s about borax is/are:

a. Each boron atom has four B-O bonds

b. Each boron atom has three B-O bonds

c. Two boron atoms have four B-O bonds while other two have three B-O bonds

d. Each boron atom has one -OH groups

1. a

2. b

3. c

4. d

Q. Mention few differences between distillation and fractional distillation.
[2 Marks]

Q. The ability of a substances to assume two or more crystalline structures is called

1. isomerism
2. polymorphism
3. isomorphism
4. amorphism

Q. Oleum is

1. castor oil
2. oil of vitriol
3. fuming $H_{2}S{O}_4$
4. none of these.

Q. Which among the following are peroxo acid of sulphur?

1. H${}_2$SO${}_4$
2. H${}_2$S${}_2$O${}_3$
3. H${}_2$SO${}_3$
4. H${}_2$S${}_2$O${}_8$