Osb India Class 10 Weekly test Question paper From chemical reaction and equation and acid base and salt
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1. In the electrolysis of water, a) Name the gas collected at anode and cathode b) Why is the volume of gas collected at one electrode double than the other? c) What would happen if dil H 2 SO 4 is not added to water? ( 3 Marks) 2. While writing chemical equations for such reactions, where are these conditions usually mentioned? A. above the arrow B. along with products C. below the plus signs D. before the reactants ( 1 Marks) 3. Chemical equations are balanced to reflect that ___________________. A. matter can change its state during chemical reactions B. matter cannot be created or destroyed during chemical reactions C. heat is an important input in chemical reactions D. all chemical reactions are always reversible (1 Marks) 4. Which of the following is TRUE about a combination reaction ? A. The number of reactants is always greater than the number of products. B. The number of products is always greater than the number of reactants. C. The number of products is always eq