Science
(i) In the given series of reactions, name the compounds X and Z.
(ii) Which type of reaction is X to Z?
(iii) You are given 3 unknown solutions A, B, and C with pH values of 6, 8 and 9.5 respectively. In which solution will the maximum number of hydronium ions be present? Arrange the given samples in the increasing order of H+ ion concentration.
Related Questions
(a) Anirudh took two metal oxides; aluminium oxide and magnesium oxide as shown in the pictures given below. But he forgot to label them. How will you guide/ help Anirudh to identify the oxides and label them?
(b) In an activity Aishu was given two substances; Copper Sulphide (Cu2S) and Copper Oxide (Cu2O) to obtain copper from these compounds. She was able to extract Copper successfully. Illustrate with the help of chemical equations how Aishu might have completed the activity.
Give reasons for the following :
(a) Certain metals are used for making cooking utensils.
(b) Hydrogen gas does not evolve when certain metals except Mg & Mn react with nitric acid.
Comment on the following statements :
(a) Bee sting is treated with baking soda paste whereas wasp sting is treated with dilute vinegar.
(b) Farmers treat soil with quicklime when tilling.
(c) Ancient sculptures and marble structures are conserved by treating them with certain chemicals.
Water is used by the leaves of the plants for photosynthesis but rather than watering the leaves, we water the plant through the soil. How does this water reach the leaves of the plant?