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Q. In Which among the given ions, the colour is not due to d-d transition -
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Q. Which one of the following is not a micro – nutrient ?
Q. The most malleable metal is
Q. The three elements most needed in common fertilisers are:
Q. Of the following which one pollutes the air of a big city ?
Q. When iron rusts, its weight will ________
Q. Anhydrous calcium chloride acts as a (an)
Q. The hottest part of the gas flame is known as the
Q. Modern periodic table is based on .......... ?
Q. The conversion of sulphur dioxide into sulphur trioxide in the contract process is
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