Chemistry Test 12

Result

Chemistry Test 12

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Weekly Quiz Competition

Question 1
4 / -1

The freezing point of equimolal solution will be highest for

A
anilinium chloride

B
calcium nitrate

C
glucose

D
sodium phosphate

Solution

Smaller the value of ΔT_f, higher will be the freezing point. The freezing point depression depends on the number of solute particles. Higher the number of solutes higher will be the value of ΔT_f. Since in option C, glucose being a non-electrolyte does not dissociate into ions, thus it has the smallest ΔT_fand the highest freezing point.
Question 2
4 / -1

If the same type of atoms are packed in cubical closest packing (CCP) and hexagonal closets packing (HCP), then

A
density of HCP is smaller than that in CCP

B
density of HCP is greater than that in CCP

C
densities of HCP is the same as in CCP

D
density of HCP may be smaller than or greater than or equal to the density of CCP depending upon the size of atom

Solution

Both ccp and HCP are closest packed, they have the same density.
Question 3
4 / -1

Which of the following statements is not correct ?

A
A colloidal solution is a heterogeneous two-phase system

B
Silver sol in water is an example of lyophilic sol

C
Metal hydroxides in water are examples of lyophobic sol

D
Liquid-liquid colloidal solution is not stable system

Solution

Silver sol in water is an example of lyophobic sol.