31. Magnesium in plants found in form of
(A) Magnesium divalent ions
(B) Magnesium dioxide ions
(C) Magnesia hydroxide ions
(D) None of the above
32. Magnesium found in plant is also responsible for giving
(A) Nitrogen from soil
(B) Green colour to the leaves
(C) Carbon dioxide to the plant
(D) None of the above
33. 70% iron in our body found
(A) In plasma
(B) In muscle cells called Myoglobin
(C) In red blood cells called Haemoglobin
(D) Both (B) and (C)
34. Non-metals can be used in
(A) Fertilizers to enhance the growth of plants
(B) Water purification process
(C) The purple colour solution which is applied on wounds as an antiseptic
(D) All of the above
35. ……………….used in crackers.
(A) Non-metals
(B) Metals
(C) Both (A) and (B)
(D) None of the above
36. Metals can be used in
(A) Machine factories and automobiles
(B) Aeroplanes, satellites and trains
(C) Industrial gadgets and cooking utensils
(D) All of the above
Answers:-
| 31-(A) | 32-(B) | 33-(D) | 34-(D) | 35-(C) | 36-(D) |