CBSE Class 9 Science Atoms and Molecules MCQs
Question : If isotopic distribution of C-12 & C-14 is 98% and 2% respect(d)ely, then number of C-14 atoms in 12 g of C is: (a) 1.244X1022 (b) 1.244X1023 (c) 3.88X1022 (d) 3.88X1022 Answer : A Question : Identify the correct symbol of gold: (a) Go (…
CBSE Class 9 Science Is Matter Around us Pure MCQs
Question. When a bottle of soda water is opened, carbon dioxide escapes, producing a fizz. This is due to: a. Decrease in solubility on decreasing temperature b. Decrease in solubility on increasing temperature c. Decrease in solubility on decreasing pressure d. Decrease…