1Write the differences between graphite and diamond.
2Write the differences between organic compounds and inorganic compounds.
3Coal or firewood should not be burned inside a room with the windows and doors shut in winter. Give the reason.
4Graphite powder can be used as a dry lubricant. Give the reason.
5Graphite and diamond are both allotropes of carbon. Graphite conducts electricity but diamond does not. Give the reason.
6The melting and boiling points of inorganic compounds are higher than those of organic compounds. Give the reason.
7When firewood burns in a stove, sometimes black smoke comes out and sometimes the fire burns well with little smoke. Give the reason.
8Define the catenation and allotropy properties of carbon with examples.
9When sugar is heated continuously, a black substance is obtained. What conclusion can be drawn from this?
10Write two examples each of crystalline and powdery allotropes of carbon.
11State the conditions under which burning carbon forms carbon monoxide or carbon dioxide, and write the related chemical equations.
12What is water gas?
13What is formed when carbon reacts with steam? Write the chemical equation of the process.
14Soapy water could not clean the grease on Rohan's clothes. His mother suggested putting a little petrol on the greasy spot. Will Rohan's problem be solved? Explain the cause and the remedy on the basis of scientific facts.
15Write four examples of organic compounds used in your daily life.
16Write the six areas of daily life where organic compounds are used.
17What are the three main organic compounds found in our food, and what do they do in the body?