Find the measure of angle ‘a’ in each figure. Give reason in each case .

Find the measure of each angle indicated in each figure where l and m are parallel lines intersected by transversal n.

Find the measure of the question marked angle in the given figure

What is the measure of angleA + angleB + angleC + angleD + angleE + angleF in the figure given below. Give reason to your answer.

Explain the following giving an appropriate reason in each case. O_(2) and F_(2) both stabilise higher oxidation states of metals but O_(2) exceeds F_(2) in doing so.

Explain the following giving an appropriate reason in each case. Structure of xenon fluorides cannot be explained by valence bond approach.

Find the surface area of each of the following figure.

Which of the following statements are true and which are false? In each case give a valid reason for saying so. Each radius of a circle is a chord of the circle

Give a brief description of the principles of the following techniques taking an example in each case. (1) Crystallisation (2) Distillation (3) Chromatography

Which of the following statements are true and which are false? In each case give a valid reason for saying so. s: If x and y are integers such that x gt y , then -x lt -y .

Which of the following statements are true and which are false? In each case give a valid reason for saying so. t : sqrt(11) is a rational number.