Middle zone of the candle is __________ in colour.

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

E is the middle point of the median AD of /_\ABC . BE intersects AC at F. Prove that AF=1/3AC .

E is the middle point of the median AD of /_\ABC . BE produced meets AC at F. Prove that CA=3AF .

if a vertex of a triangle be(1,1) and the middle point of the sides through this point are(-2,3) and (5,2) , find the other vertices

The value of refractive index of a medium does not depend on the colour of light.

Explain the observation that gave Newton the idea that sunlight is made of seven colours.

Give the name of the pigment, which imparts colour to red algae. \

find the co-ordinates of the middle points of the line segment joining the pair of points given below: (-3,2), (5,2)

find the co-ordinates of the middle points of the line segment joining the pair of points given below: (2,3), (3,4)