1. Blood is a

(a) colloidal solution                      

(b) true solution

(c) suspension                                 

(d) none of these

Ans. (b)

2. The size of the particles of a true solution is

(a) 10-2                                (b) 10-5

(c) 10-7                                 (a) 10-8

Ans. (c)

3. Identify the property of true solution

(a) Translucent                    

(b)Heterogeneous

(c) Homogeneous               

(d) None of these

Ans. (c)

4. What should be the size of the
filter paper cone

(a) smaller than the cone of the funnel

(b) larger
than the cone of the funnel 

(c) equal to the cone of the funnel

(d) very large

Ans. (a)

5. The particles of true solution —

(a)  are visible with powerful microscope

(b)  are visible with naked eye

(c)  are not visible even with
microscope 

(d) none of these

Ans. (c)

6• What is the color of sulphur ?

(a) Red                          (b) Whit
(c)
Yellow                      (d) Green

Ans. (c)


7. Out of the following which is most stable



(a) colloid                           

(b) suspension

(c) true solution                  

(d) none of these       

Ans. (c)

8. Sulphur is soluble in —

(a) alcohol                      

(b) water   

(c) carbon disulphide         

(d) none of these

Ans. (c)


9. Out of the following which is not a compound

(a) NaCI                             (b) H2O

(c) ZnS                             (d) Steel

Ans. (d)


10.Which of the following has lowest melting point?

(a) Iron sulphides              (b) Sulphur

(c) Iron                               (d) FeS2

Ans. (b)