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The method that cannot be used for removing permanent hardness of water is
OpenVideRime asked 5 years ago • 
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The mass number of a nucleus is
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The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
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The heat energy produced when the human body metabolises 1 gram of fat is
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The Latin word ‘Formica’ means ant. The name formic acid is derived from this Latin word because
OpenVideRime asked 5 years ago • 
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The heat required to raise the temperature of body by 1 K is called
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The oldest rocks in the earth’s crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth’s early life and solidified into hard rock’s called
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Which of the following diffuses most quickly?
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O2 released in the process of photosynthesis comes from
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RDX is
OpenVideRime asked 5 years ago • 
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