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2 .A person having AB – group of blood can donate blood to a person having
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3 .Why do birds not have respiratory trouble at the time of flying at high altitude ?
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4 .Source of energy in ecosystem is
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5 .Which of the following elements is not present in stainless steel ?
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6 .Select the one which is not a mixture
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7 .The temperature which has the same reading on both Fahrenheit and Celsius scales is
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8 .What is the main constituent of "Pearl" ?
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9 .The cal orie requi rement of t he body i ncreases i n wi nt er as compare d t o summer because more cal ori es are necessary to
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10 .Water and ice crystals are in equilibrium at 0°C. When pressure is applied to this system
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