Describe nitrification along with the equations and the organisms involved in each step.

Represent schematically the nitrogen cycle. Name the organisms involved in this cycle.

A sweet smelling organic compound (A) is slowly oxidised by air in presence of light to a highly poisonous gas on warming with silver powder, it forms a gaseous substance (B), which is also produced by the action of calcium carbide on water. Identify (A) and (B) and write the chemical equations of the reactions involved.

Solve the following equations and verify in each case: 3x = 0

Describe the first and second mode of vibrations of an open organ pipe.

State the function along with one example each of Antioxidant.

How is nitrogen prepared in the laboratory? Write the chemical equations of the reactions involved.

Solve the following equations and verify in each case: x-35 = 34

Solve the following equations and verify in each case: 4y = 23

Solve the following equations and verify in each case: x + 28 = 50

Solve the following equations and verify in each case: -8 + x = -2