Subject :NSO Class : Class 6
Read the following statements.
(i) Air dissolved in water cannot be removed from it.
(ii) Density of air decreases with increasing altitude.
(iii) Air is an element that surrounds the Earth and makes it hospitable for living organisms.
(iv) Air helps in pollination of several flowers and in the dispersal of seeds.
Which of the above statements are correct?
A (i) and (ii) only
B (ii) and (iv) only
C (i) and (iii) only
D (iii) and (iv) only
Ans 1:
Class : Class 9
Ans 2:
Class : Class 6
Ans 3:
Class : Class 6
Ans 4:
Class : Class 6
Ans 5:
Class : Class 9
ans is not option D as air is not an element , air is a mixture of many elements and compounds......further more statement 2 is correct as air density decreases with increasing altitude i.e air density decreases with increase in height
Ans 6:
Class : Class 6
No ans is not D it's B because air is a mixture not an element.
Ans 7:
Class : Class 10
answer is D, air density decreases on increse in height
Ans 8:
Class : Class 6
Answer is D.
Ans 9:
Class : Class 6