Group 15

Name or state the following with reference to the element of the first three periods of the periodic table. Non-metallic element present in Period 3 of Groups 15 and 16.

Give reasons for the following: (i) Oxygen is a gas but sulpher is a solid. (ii) O_(3) acts as a powerful oxidising agent. (iii) BiH_(3) is the strongest reducing agent amongst all the hydrides of Groups 15 elements.

Name or state the following with reference to the element of the first three periods of the periodic table. Typical elements of Groups 14 and 15.

Name or state the following with reference to the elements of the first three periods of the periodic table. Typical elements of Groups 14 and 15.

Name or state the following with reference to the elements of the first three periods of the periodic table. Valency of elements in Group 14 and 15.

What are those elements which belong to Groups 1,2, 13, 14, 15, 16, 17.

State the bonding & state of chlorides of period-3 - group 1 [IA], 15 [VA], 16 [VIA]

Study the bar graph representing the number of persons in various age groups in a town shown in Figure. Observe the bar graph and answer the following questions: (i)What is the percentage of the youngest age-group persons over those in the oldest age group? (ii)What is the total population of the town? (iii)What is the number of persons in the age group 60-65? (iv)What is the age-group of exactly 1200 persons living in the town? (v)What is the total number of persons living in the town in the age group 50-55? (vi)What is the total number of persons living in the town in the age group 10-15 and 60-65?

The following table presents the number of illiterate females in the age group (10-34) in a town: Age group: 10-14 15-19 20-24 25-29 30-34 No. of Females: 300 980 800 580 290 Draw a histogram to represent the above data:

Consider the following information about element P and Q: {:(,"Period number","Group number"),(P,2,15),(Q,3,2):} the formula of the compound formed by P and Q element is: