Complex Numbers

Vectors (common to physics and mathematics)

Mole concept

1. The inequality |z-4|<|z-2| represents the region given by

a. Re(z)>0

b. Re(z)<2

c. Re(z)<0

d. none of these

2. The points with the position vectors 60

**i**+3

**j**, 40

**i**-8

**j**, a

**i**-52

**j**are collinear if

a. a = -40

b. a = 40

c. a = 20

d. none of these

3. One molal solution is one that contains one mole of a solute in :

a. 1000 g of the solvent

b. one litre of the solvent

c. one litre of the solution

d. 22.4 litres of the solution

For solution see

http://iit-jee-nrao.blogspot.com/2008/05/solutions-for-may-25-practice-set.html

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