Chemistry Chemical formula of washing soda is Ca(OH)2 NaHCO3 Na2CO3.10H2O Na2SO4.10H2O Ca(OH)2 NaHCO3 Na2CO3.10H2O Na2SO4.10H2O ANSWER DOWNLOAD EXAMIANS APP
Chemistry The addition of gypsum to portland cement helps in : Preventing rapid setting of cement Reduction in the cost of cement Rapid setting of cement Increasing the strength of cement Preventing rapid setting of cement Reduction in the cost of cement Rapid setting of cement Increasing the strength of cement ANSWER DOWNLOAD EXAMIANS APP
Chemistry Why is water not suitable for putting out a petrol fire ? The oxygen content of water is isolated by petrol and thus it helps in burning The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water Water, being heavy, slips below petrol which thus remains in contact with air and burns The oxygen content of water is isolated by petrol and thus it helps in burning The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water Water, being heavy, slips below petrol which thus remains in contact with air and burns ANSWER DOWNLOAD EXAMIANS APP
Chemistry In an oxygen molecule, two atoms are united by Two bonds Three bonds One bond Four bonds Two bonds Three bonds One bond Four bonds ANSWER DOWNLOAD EXAMIANS APP
Chemistry When ice cubes are made, the entropy of water Does not change Increases May either increase or decrease depending on the process used Decreases Does not change Increases May either increase or decrease depending on the process used Decreases ANSWER DOWNLOAD EXAMIANS APP
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