Which compound is a component of baking powder?
A. Na2CO3 B. Na2SO4 C. K2CO3 D. NaHCO3 E. NaHSO4 Correct Answer: Option D – NaHCO3
if an element X with atomic number 13 combines with an element Y whose atomic number is 8 the most likely formula of the compound formed between X and Y is?
A. XY B. X2Y C. XY2 D. X3Y2 E. X2Y3 Correct Answer: Option E – X2Y3
Fructose and glucose are?
A. allotropes of each other. B. both disaccharides C. dimere of each other. D. isomers of each other E. isotopes of each other Correct Answer: Option D – isomers of each other
Detergents are better than soaps for washing in hard water because?
A. hard water contains insoluble calcium salts. B. they contain bleaching powder. C. they contain palmitic acid. D. they do not form insoluble calcium and magnesium salts. E. they are organic compounds. Correct Answer: Option D – they do not form insoluble...
Ethanol is a product of fermentation of simple sugars. Which method is used to separate ethanol from the other products?
A. boiling off the ethanoic B. filtration C. fractional crystallisation D. fractional distillation E. isomerization Correct Answer: Option D – fractional distillationProducts
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