In this video i have discussed in detail the various types of solid systems, difference between the crystalline and amorphous solids and classification of crystalline solidd

Important topic for board as well as compititive exams . use of zeolites as shape selective catalyst and for softening of hard water. use of zsm-5 in petrochemical industry.

This is very important topic for board and compititive exams. learn what is a catalyst , what are positive and negative catalysts . will also learn about catalytic promoter and catalytic poison . you will also be able to differentiate between homogeneous and heterogeneous catalysis.

Quadratic equations | exercise 4.1 (2-iv) 2. represent the following situations in the form of quadratic equations: (iv) a train travels a distance of 480 km at a uniform speed. if the speed had been 8 km/h less, then it would have taken 3 hours more to cover the same distance. we need to find the speed of the train.

Quadratic equations | exercise 4.1 2(iii) 2. represent the following situations in the form of quadratic equations: (iii) rohan’s mother is 26 years older than him. the product of their ages (in years) 3 years from now will be 360. we would like to find rohan’s present age.

Quadratic equations | exercise 4.1 2(ii) 2. represent the following situations in the form of quadratic equations: (ii) the product of two consecutive positive integers is 306. we need to find the integers.

Quadratic equations | exercise 4.1 2(i) 2. represent the following situations in the form of quadratic equations: (i) the area of a rectangular plot is 528 m2. the length of the plot (in metres) is one more than twice its breadth. we need to find the length and breadth of the plot.