Chemistry Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ? Sodium chloride Saltpetre Borax Hydrogen peroxide Sodium chloride Saltpetre Borax Hydrogen peroxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind? 1/6 1/4 1/8 1/3 1/6 1/4 1/8 1/3 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Major portion of the earth’s crust is mainly constituted by Oxygen and Iron Silicon and Aluminium Silicon and Iron Oxygen and Silicon Oxygen and Iron Silicon and Aluminium Silicon and Iron Oxygen and Silicon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Tear gas is : Carbonyl chloride Bleaching powder Nitrous oxide Chloroprene Carbonyl chloride Bleaching powder Nitrous oxide Chloroprene ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sour taste of lemon is due to the presence of which of the following ? Formic acid Oxalic acid Citric acid Acetic acid Formic acid Oxalic acid Citric acid Acetic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? From brown to orange-red From brown to blue-black From blue to pink From pink to blue-green From brown to orange-red From brown to blue-black From blue to pink From pink to blue-green ANSWER DOWNLOAD EXAMIANS APP
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