fix grammar
The experiment consist independent variable is (Na2S2O3)and dependent variable is time taken for cross to disappear.
The experiment consists of an independent variable, which is (Na2S2O3), and a dependent variable, which is the time taken for the cross to disappear.
To fix the grammar in the given sentence, you need to make a few changes. Here's the corrected version:
The experiment consists of an independent variable, which is (Na2S2O3), and a dependent variable, which is the time taken for the cross to disappear.