B is an isotope of the element (^{238} _{92}Ur). The isotope B has
B is an isotope of the element (^{238} _{92}Ur). The isotope B has A. 46 protons and 119…
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Which statement is NOT true about the composition of starch?
Which statement is NOT true about the composition of starch? A. It contains only the atoms of carbon,…
Chlorine is used in water purification because it
Chlorine is used in water purification because it A. bleaches impurities in the water B. decolorizes water C.…
if an element X with atomic number 13 combines with an element Y whose atomic…
if an element X with atomic number 13 combines with an element Y whose atomic number is 8…
Which compound is a component of baking powder?
Which compound is a component of baking powder? A. Na2CO3 B. Na2SO4 C. KH2CO3 D. NaHCO3 E. NaHSO4…
When an electric current is passed through a solution containing dilute tetraoxosulphate (Vi) acid, 190…
When an electric current is passed through a solution containing dilute tetraoxosulphate (Vi) acid, 190 cm3 of hydrogen…
A measure of the degree of disorderliness in a chemical system is known as the
A measure of the degree of disorderliness in a chemical system is known as the A. activation energy…
Fructose and glucose are
Fructose and glucose are A. allotropes of each other. B. both disaccharides C. dimere of each other. D.…
Detergents are better than soaps for washing in hard water because
Detergents are better than soaps for washing in hard water because A. hard water contains insoluble calcium salts.…
Which method is NOT used to determine rate of a reaction?
Which method is NOT used to determine rate of a reaction? A. change in amount of precipitate formed…