Q861
Open questionThe addition of gypsum to portland cement helps in :
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Q862
Open questionWhich gas is most stable at room temperature?
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Q863
Open questionWhich of the following is used as a preservative to protect processed food?
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Q864
Open questionChemical composition of cement is
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Q865
Open questionWhich one of the following elements is used in the manufacture of fertilizers ?
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Q866
Open questionAsbestos is formed of :
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Q867
Open questionBayer's reagent is
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Q868
Open questionBone ash contains
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Q869
Open questionCement is made hard with
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Q870
Open question'Plaster of Paris' is made by partial dehydration of
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Q871
Open questionWhich substance is used to retard the setting action of cement?
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Q872
Open questionStalactites and Stalagmites form due to the precipitation of :
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Q873
Open questionWhich of the following is not a precious/semi-precious stone?
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Q874
Open questionThe chemical substance present in bones and teeth is
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Q875
Open questionThe chemical substance present in bones and teeth is
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Q876
Open questionBaryllium Sulphate is less soluble in water due to
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Q877
Open questionChile saltpeter is the common name of:
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Q878
Open questionSetting of plaster of paris involves
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Q879
Open questionFind the odd one:
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Q880
Open questionThe chemical name of 'Plaster of Paris' commonly used for setting broken bones is
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