A transverse section of the trunk of a tree shows concentric rings which are known as growth rings. How are these rings formed? What is the significance of these rings?

What is annual ring? How is it formed?

How is the ring structure of glucose formed?

Members of which phylum are known as segmented of ring worms?

What is the type of ring structure in glucose?

Which amino acids has an aromatic ring ?

While on the trip to Kashmir, Pintoo observed that cut portions of large trees shows distinct rings, which he never found in Maharahtra. Why is so?

Carbon forms a large number of compounds because of its two unique properties formed many have long straight chains of carbon, branched chains of carbon or rings of carbon. In these compounds, carbon atoms may form single, double or triple covalent bonds. Compounds in which the carbon atoms are linked to each other by single bonds are called saturated carbon compounds whereas compounds having at least one carbon-carbon double or triple bond are called unsaturated carbon compounds. Compounds containing only carbon and hydrogen are known as hydrocarbons. Based on the above information, answer the following questions. ii. Give two examples of carbon compounds which have ring structure.

Carbon forms a large number of compounds because of its two unique properties formed many have long straight chains of carbon, branched chains of carbon or rings of carbon. In these compounds, carbon atoms may form single, double or triple covalent bonds. Compounds in which the carbon atoms are linked to each other by single bonds are called saturated carbon compounds whereas compounds having at least one carbon-carbon double or triple bond are called unsaturated carbon compounds. Compounds containing only carbon and hydrogen are known as hydrocarbons. Based on the above information, answer the following questions. iv. Give IUPAC names of first two members of hydrocarbon which contain carbon-carbon double bonds.

A body' of mass m slides down on an inclined plane and reaches'the bottom with a velocity V. If the same mass were in the form of a ring which rolls down on the inclined plane, then the velocity of the ring at the bottom will be