Which of the following are primary and secondary data? i. Collection of the data about enrollment of students in your school for a period from 2001 to 2010. ii. Height of students in your class recorded by physical education teacher.

Which of the following are primaryt and secondary data ? (i) Collection of the data about enrollment of students in your school for a period from 2001 to 2010. (ii) Height of students in your class recorded by physical education teacher.

Describe the change in hybridisation (if any) of the Al in the following reaction. AlCl_(3)+Cl^(-) to AlCl_(4)^(-)

The probability that a student is not a swimmer is 1/5 . Then the probability that out of five students, four are swimmers is (A) ^5C_4""(4/5)^4""1/5 (B) (4/5)^4""1/5 (C) ^5C_1 1/5(4/5)^4 (D) None of these

Are the positions of (5,-8) and (-8,-5) is same? Justify your answer.

Which programme is undertaken in your school to increase the nutritional status of the students. Discuss the programme.

Describe the change in hybridisation (if any) of the Al atom in the following: AlCl_(3)+Cl^(ө)rarr AlCl_(4)^(ө)

Describe any three types of modified underground stem.

Describe any three main types of structural aberrations of chromosomes.

In the given figure, name (i) any six points (ii) any five line segments (iii) any four rays (iv) any four lines (v) any four collinear points