Chemistry The first metal used by a man was Silver Brass Copper Bronze Silver Brass Copper Bronze ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most important ore of lead is Siderite Pyrolusite Galena Magnetite Siderite Pyrolusite Galena Magnetite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Chemical composition of cement is Limestone and Clay Limestone and Gypsum Clay and Gypsum Limestone, Clay and Gypsum Limestone and Clay Limestone and Gypsum Clay and Gypsum Limestone, Clay and Gypsum ANSWER DOWNLOAD EXAMIANS APP
Chemistry The water pollution in river is measured by the dissolved amount of Ozone Oxygen Nitrogen Chlorine Ozone Oxygen Nitrogen Chlorine ANSWER DOWNLOAD EXAMIANS APP
Chemistry Commercially, sodium bicarbonate is known as Washing soda Soda ash Bleaching powder Baking soda Washing soda Soda ash Bleaching powder Baking soda ANSWER DOWNLOAD EXAMIANS APP
Chemistry 1 carat of diamond is equal to 200 g 100 mg 200 mg 100 g 200 g 100 mg 200 mg 100 g ANSWER DOWNLOAD EXAMIANS APP