Chemistry Aqua regia is a 1 : 3 mixture, by volume, of Conc. sulphuric acid and conc. nitric acid Conc. nitric acid and conc. hydrochloric acid Conc. hydrochloric acid and conc. nitric acid Conc. nitric acid and conc. sulphuric acid Conc. sulphuric acid and conc. nitric acid Conc. nitric acid and conc. hydrochloric acid Conc. hydrochloric acid and conc. nitric acid Conc. nitric acid and conc. sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry In surgery, metal pins are used for joining together broken bones. These metal pins remain uncorroded in the body. What is the material of these pins? Titanium Iron Aluminium Copper Titanium Iron Aluminium Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry Normal rainwater is slightly acidic due to the presence of Sulphur dioxide None of these Carbon dioxide Methane Sulphur dioxide None of these Carbon dioxide Methane ANSWER DOWNLOAD EXAMIANS APP
Chemistry Browning of paper in old books is caused by Collection of dust Lack of aeration Oxidation of cellulose Frequent use Collection of dust Lack of aeration Oxidation of cellulose Frequent use ANSWER DOWNLOAD EXAMIANS APP
Chemistry Greenhouse effect is caused by Nitrogen Nitrogen dioxide Carbon dioxide Carbon monoxide Nitrogen Nitrogen dioxide Carbon dioxide Carbon monoxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not present in German-silver? Silver Zinc Copper Nickel Silver Zinc Copper Nickel ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS