Chemistry A balloon filled with helium rises in air because Helium is less dense than air The balloon is weightless Air exerts an upward force on the balloon Helium pushes down on the air below the balloon Helium is less dense than air The balloon is weightless Air exerts an upward force on the balloon Helium pushes down on the air below the balloon ANSWER DOWNLOAD EXAMIANS APP
Chemistry An acid having basicity one is Sodium phosphate Disodium hydrogen phosphate Phosphoric acid Sodium dihydrogen phosphate Sodium phosphate Disodium hydrogen phosphate Phosphoric acid Sodium dihydrogen phosphate ANSWER DOWNLOAD EXAMIANS APP
Chemistry An element of atomic no. 29 belongs to D-block S-block F-block P-block D-block S-block F-block P-block ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following acids serves as an electrolyte in a lead storage battery? Nitric acid Hydrochloric acid Lactic acid Sulphuric acid Nitric acid Hydrochloric acid Lactic acid Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sour taste of lemon is due to the presence of which of the following ? Oxalic acid Citric acid Formic acid Acetic acid Oxalic acid Citric acid Formic acid Acetic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following contributes largely to the ‘green house effect’ ? Carbon dioxide Ozone Water vapour Carbon monoxide Carbon dioxide Ozone Water vapour Carbon monoxide ANSWER DOWNLOAD EXAMIANS APP
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