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 pink to blue-green From blue to pink From brown to blue-black From brown to orange-red From pink to blue-green From blue to pink From brown to blue-black ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chemical used in embalming biological materials is Gaseous formaldehyde Ethylene glycol Formaldehyde in methanol Formaldehyde in water Gaseous formaldehyde Ethylene glycol Formaldehyde in methanol Formaldehyde in water ANSWER DOWNLOAD EXAMIANS APP
Chemistry Stains of rust on clothes can be removed by : Oxalic acid H2O2 Petrol Alcohol Oxalic acid H2O2 Petrol Alcohol ANSWER DOWNLOAD EXAMIANS APP
Chemistry The name of plastic polymer from which combs, toys, bowls etc., can be made, is Teflon Metallic polysulphides Polyurethane Polystyrene Teflon Metallic polysulphides Polyurethane Polystyrene ANSWER DOWNLOAD EXAMIANS APP
Chemistry When formaldehyde and potassium hydroxide are heated, we get Ethyl formate Acetylene Methane Methyl alcohol Ethyl formate Acetylene Methane Methyl alcohol ANSWER DOWNLOAD EXAMIANS APP
Chemistry The buffer action of blood is due to the presence of CI– and [HCO3]– HCI and NaCI CI– and [CO3]2– [HCO3]– and H2CO3 CI– and [HCO3]– HCI and NaCI CI– and [CO3]2– [HCO3]– and H2CO3 ANSWER DOWNLOAD EXAMIANS APP
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