P-1 Chemical reactions and equations — Science STD 10 — Question

How does baking powder differ from baking soda?

Characters of a phylum are given below. Read them carefully and answer the questions:
(a) Spines of calcium carbonate are present on the body, (b) These animals are exclusively marine, (c) They perform the locomotion with the help of tube feet, (d) Their skeleton is made up of calcareous plates or spicules.
(i) Animals of which phylum show the above character?
(ii) Give an example from that phylum.
(iii) These animals can be classified with the help of which criteria of new system of animals classification.

What is the nature of the oxides of metals?

How does ethanoic acid react with sodium hydrogencarbonate? Give equation of the reaction which takes place.

What is meant by life processes? Name the basic life processes common to all living organisms which are essential for maintaining life.

What would have been happened if any of the cells in nature had not been divided by meiosis?

If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?

Name one organism which reproduces by binary fission and another which reproduces by multiple fission.