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646: A person with AB blood group is sometimes called a universal recipient because of the

(a) lack of antigen in his blood

(b) lack of antibodies in his blood

(c) lack of both antigens and antibodies in his blood

(d) presence of antibodies in his blood
647: If water contracts on freezing, which of the following would happen?

(a) Icebergs will completely float on the surface of water

(b) Ice would become more dense

(c) Lakes would freeze from top to bottom

(d) Rocks will crack due to freezing or internal water
648: One mole of hydrogen gas burns in excess of oxygen to give 290 kJ of heat. What is the amount of heat produced when 4g of hydrogen gas is burnt under the same conditions ?

(a) 145 kJ

(b) 290 kJ

(c) 580 kJ

(d) 1160 kJ
649: Consider the volumes of the following:

1. A parallelepiped of length 5 cm, breadth 3 cm and height 4 cm
2. A cube of each side 4 cm
3. A cylinder of radius 3 cm and length 3 cm
4. A sphere of radius 3 cm

The volumes of these in the decreasing order is

(a) I, III, II, IV
(b) IV, II, III, I
(c) I, II, III, IV
(d) IV, III, II, I
650: Who among the following was not associated with the formation of U. P. Kisan Sabha in February 1918?

(a) Jawharlal Nehru
(b) Gauri Shankar Misra
(c) Madan Mohan Malviya
(d) Indra Narain Dwivedi
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