Use the data to comment upon: the ease with which iron can be oxidised as compared to a similar process for either chromium or manganese metal.

For M^(2+)//M and M^(3+)//M^(2+) system the E^@ values for some metals are as folows : Use this data to comment upon : the ease with which iron can be oxidised as compared to the similar process for either chromium or manganese metal.

For M^(2+)//M and M^(3+)//M^(2+) system the E^@ values for some metals are as folows : Use this data to comment upon : the stability of Fe^(3+) in acid solution as compared to that of Cr^(3+) or Mn^(3+) .

Give the technical terms used for the following: The chemicals which can be sprayed on the leaves to either bring about closure of stomata or to form aflim on their surface to check transpiration.

Give an appropriate answer of the following question- An alloy is made up of mixture of Nickle, iron, Chromium, Manganese metals. What is the name of that alloy?

The metal which does not form colour compound is: Chromium, Iron, Zinc, Manganese.

A container opened from the top is made up of a metal sheet is in the form of a frustum of a cone of height 16 cm with radii of its lower and upper ends as 8 cm and 20 cm, respectively. Find the cost of the milk which can completely fill the container, at the rate, of Rs 20 per litre. Also find the cost of metal sheet used to make the container, if it costs Rs 8 per 100 cm^2 . (Take pi = 3.14.)