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HELPS IN PROPAGATING RADIO SIGNALS
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Which of the following substances undergoes chemical change on heating? 1 Sodium chloride 2 Silica 3 Lead nitrate 4 Platinum wire
In which of the following processes light energy is converted into chemical energy? 1 Respiration 2 Fermentation 3 Photosynthesis 4 Photoresiration
Which of the following is a protein? 1 Wool 2 Starch 3 Natural rubber 4 Cellulose
Which is/are the important raw material(s) required in cement industry? 1 Limestone 2 Gypsum & clay 3 Clay 4 Limestone & clay
What is one light minute?
Which among the following is a positively charged particle emitted by a radioactive element? 1 Alpha ray 2 Beta ray 3 Gamma ray 4 Cathode ray
Potassium nitrate is used in 1 Salt 2 Glass 3 Fertilizer 4 Medicine
When did india conduct three under ground nuclear tests?
Gypsum is added to cement clinker to 1 Increase the tensile strength of cement 2 Bind the particles of calcium silicate 3 Decrease the rate of setting of cement 4 Facilitate the formation of colloidal gel
why ammonia cylinder getting icing outside of cylinder when it approx half or less than it...??
Which of the following metals react with nitrogen at room temperature to form nitride? 1 Sodium 2 Potassium 3 Magnesium 4 None of these
what are the advantages of interrupt and exception?
Biological Sciences 
