1. Carbon exists in the atmosphere in the form of _____. A. Carbon monoxide only B. Carbon monoxide in traces…
Browsing: Chemistry
1. Water is decomposed into hydrogen and oxygen by means of an electric current by the method of _________. A.…
1. Name the acid present in ant sting _____. A. Acetic acid B. Citric acid C. Oxalic acid D. Formic…
1. Which of the following determines that a chemical reaction has not taken place ? A. Change in size B.…
1. Which group was added in Mendeleev’s periodic table? A. l group B. Vll group C. Zero group D. V…