[HDquiz quiz = “5114”]
Browsing: Chemistry
1. Water is decomposed into hydrogen and oxygen by means of an electric current by the method of _________. A.…
[HDquiz quiz = “5102”]
1. Name the acid present in ant sting _____. A. Acetic acid B. Citric acid C. Oxalic acid D. Formic…
[HDquiz quiz = “5090”]
1. Which of the following determines that a chemical reaction has not taken place ? A. Change in size B.…
[HDquiz quiz = “5079”]
1. Which group was added in Mendeleev’s periodic table? A. l group B. Vll group C. Zero group D. V…
[HDquiz quiz = “5058”]
1. In the periodic table, the element with atomic number 16 will be placed in the group ___________. A. Third…