(a) Define any two of the following terms: (i) van’t Hoff factor

Monjur Alahi

(a) Define any two of the following terms:
(i) van’t Hoff factor
(ii) Mole fraction
(iii) Ebullioscopic constant
(b) State Raoult’s law.


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

(a) Van’t Hoff factor: (i) May be defined as the ratio of normal molecular mass to observed molecular mass or the ratio of observed colligative property to calculated colligative property. 

(ii) Mole fraction may be defined as the ratio of number of moles of one component to the sum of moles all the components present in a solution.

 (iii) Ebuthoscopic constant may be defined as the elevation in boiling point when one mole of a non-volatile solute is added to 1000 grams of solvent.

(b) It states that for a solution of volatile liquids the partial vapour pressure of each component in the solution is directly proportional to its mole faction

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Give a definition for each of the following terms. Are there other terms that need to be defined first?

(i) Parallel lines : Two straight lines which have no point in common are said to be parallel to each other. ‘Point’ and ‘straight line’ will have to be defined...

1 Answers 1 views
Define the following terms and give one example for each: (a) Commensalism (b) Parasitism (c) Camouflage (d) Mutualism (e) Interspecific competition

(a) Commensalism: Commensalism is an interaction between two species in which one species gets benefited while the other remains unaffected. An orchid growing on the branches of a mango tree...

1 Answers 1 views
Define the terms Antigen and Antibody. Name any two diagnostic kits based upon them.

An antigen is a foreign substance that elicits the formation of an antibody. Antibody is a protein that is synthesised in response to an antigen. Antigen and antibody show high degree of specificity in binding each...

1 Answers 1 views
What is the Van't Hoff factor in K4 [Fe(CN)6 ] and BaCl2 ?

Answer: 5 and 3

1 Answers 2 views
What is van't Hoff factor ? How is it related with :

 (a) α = i - 1/n -1  (b) α = i - 1/1/n - 1

1 Answers 1 views
Find the sum of n terms of an A.P.whose nth terms is given by an= 5 - 6n.

We have, an = 5-6n ⇒ a1 = 5 - 6 x 1 = -1 So, the given sequence is an A.P with first term a = a1 = -1 and last...

1 Answers 1 views
The sum of the 4th and 8th terms of an AP is 24 and the sum of the 6th and the 10th terms is 44. Find the first three terms of the AP.

Solution: a + 3d + a + 7d = 24 Or, 2a + 10d = 24 Similarly, 2a + 14d = 44 So, 44 – 24 = 4d Or, d = 5 2a + 10x5...

1 Answers 2 views
Using factor theorem, show that a - b is the factor of a(b^2 - c^2) + b(c^2 - a^2) + c(a^2 - b^2)

By factor theorem, (a - b) will be the factor of the given expression if it vanishes by substituting a = b is it Substituting a = b in the...

1 Answers 1 views
Arrange the following solutions in increasing order of Vant Hoff factor.

0.1MC12H22O11 < 0.1MKCl < 0.1M CaCl2 < 0.1M Al2(SO4)3

1 Answers 1 views
Give a definition for each of the following terms. Are there other terms that need to be defined first ?

(i) Parallel lines: Lines which don’t intersect any where are called parallel lines.  (ii) Perpendicular lines: Two lines which are at a right angle to each other are called perpendicular lines.  (iii)...

1 Answers 1 views
X