Important Math and Science Question class 10

1. Write the balanced chemical equations for the following reactions and identify the type of reaction in each case

(a) Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773K to form ammonia gas.

(b) Limestone is heated strongly to form quicklime and carbon dioxide gas is evolved

2. List the common food chain of a pond ecosystem

3. Why NaCl does not conduct electricity in a solid-state whereas it does conduct electricity in aqueous solution as well as in molten state

4. Solve the equations 5x – y = 5 and 3x – y = 3 graphically.