Chemistry What is the most commonly used substance in fluorescent tubes? Mercury oxide and neon Mercury vapour and argon Sodium oxide and argon Sodium vapour and neon Mercury oxide and neon Mercury vapour and argon Sodium oxide and argon Sodium vapour and neon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Detergents are Sodium salts of sulphonic acids Sodium salts of fatty acids Sodium salt of benzoic acid None of these Sodium salts of sulphonic acids Sodium salts of fatty acids Sodium salt of benzoic acid None of these ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following contributes largely to the ‘green house effect’ ? Carbon monoxide Ozone Water vapour Carbon dioxide Carbon monoxide Ozone Water vapour Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used to make light weight, but strong plastic ? Polythene Methyl Methacrylate Polyvinyl Chloride Nylon Polythene Methyl Methacrylate Polyvinyl Chloride Nylon ANSWER DOWNLOAD EXAMIANS APP
Chemistry The number of waves in n x 10th Bohr's orbit are n-2 n n3 n2 n-2 n n3 n2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The iron ore which contains 72% of iron is : Haematite Limonite Magnetite Siderite Haematite Limonite Magnetite Siderite ANSWER DOWNLOAD EXAMIANS APP
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