Chemistry Brass gets discoloured in air due to constant exposure in presence of: Aluminium sulphide Hydrogen sulphide Aluminium phosphide Hydrogenated wafers Aluminium sulphide Hydrogen sulphide Aluminium phosphide Hydrogenated wafers ANSWER DOWNLOAD EXAMIANS APP
Chemistry Total number of naturally occurring elements 98 92 110 62 98 92 110 62 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Catalyst is a substance which None of these Decreases the rate of reaction Has no action on the rate of the reaction Increases the rate of the reaction None of these Decreases the rate of reaction Has no action on the rate of the reaction Increases the rate of the reaction ANSWER DOWNLOAD EXAMIANS APP
Chemistry The product, 9-nitroanthracene is obtained from anthracene by the action of Nitric acid and acetic acid Nitric acid and ethyl alcohol Nitric acid in excess Nitric acid and acetic anhydride Nitric acid and acetic acid Nitric acid and ethyl alcohol Nitric acid in excess Nitric acid and acetic anhydride ANSWER DOWNLOAD EXAMIANS APP
Chemistry 'Plaster of Paris' is made by partial dehydration of Blue vitriol Epsom salt Green vitriol Gypsum salt Blue vitriol Epsom salt Green vitriol Gypsum salt ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following processes is used for the production of Biodiesel ? Translation Transamination Transcription Transesterification Translation Transamination Transcription Transesterification ANSWER DOWNLOAD EXAMIANS APP
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