Ruby is an oxide of__________? April 15, 2025 by admin A. silver B. gold C. platinum D. aluminium oxide
First Atomic theory was proposed by? April 15, 2025 by admin A. John Dalton B. E.Rutherford C. De Broglie D. D.I.Mendeleef
Air contains maximum amount of__________? April 15, 2025 by admin A. oxygen B. nitrogen C. hydrogen D. carbon dioxide
The alcohol used in the preparation of dynamite is________? April 15, 2025 by admin A. ethyl alcohol B. glycerol C. glycol D. methyl alcohol
The element used in lead pencils is__________? April 15, 2025 by admin A. Zinc B. Lead C. Carbon D. Tin
Epsom salt is chemically known as_________? April 15, 2025 by admin A. Copper Sulfate B. Magnesium Sulfate C. Ferrous Sulfate D. None of these
Calcium sulphate is known as__________? April 15, 2025 by admin A. Epsom salt B. Gypsum salt C. Blue vitriol D. Potash alum
Oil of vitriol is_________? April 15, 2025 by admin A. Nitric acid B. Hydrochloric acid C. Phosphoric acid D. Sulfuric acid
The term PVC used in the plastic industry stands for______________? April 15, 2025 by admin A. Phosphavinyl chloride B. Phosphor vanadiu chloride C. Polyvinyl chloride D. Polyvinyl carbobate
Human bone does not contain_________? April 15, 2025 by admin A. Calcium B. Chondroitin sulfate C. Boron D. phosphate
