DSSSB TGT c9chemicallaws — practice questions
12 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice DSSSB TGT c9chemicallaws in the app →Per NCERT Class 9 Science Ch 9, the LAW OF CONSERVATION OF MASS states which of the following?Per NCERT, who proposed the LAW OF CONSERVATION OF MASS in 1789 — and is called the Father of Modern ChemistryPer NCERT, in Activity 9.2 with vinegar and baking soda, why did Experimental Set-up 1 show a DECREASE in finaPer NCERT Example 9.1, 4.0 g calcium carbonate reacts with 2.92 g HCl to give CO₂, water, and calcium chloridePer NCERT, the LAW OF CONSTANT PROPORTIONS states which of the following?Per NCERT, who is credited with the LAW OF CONSTANT PROPORTIONS (or Definite Proportions)?Per NCERT Example 9.2, 12 g of carbon combines with 32 g of oxygen to form 44 g of CO₂. How much CO₂ forms froPer NCERT, what does the law of constant proportions imply about WATER (H₂O) from different sources (e.g. rainPer NCERT, what is the difference between a PHYSICAL and a CHEMICAL change?Per NCERT, in Activity 9.3 mixing sodium sulfate solution with barium chloride solution in a closed system, whPer NCERT, in the Activity 9.3 reaction between sodium sulfate and barium chloride, does the TOTAL MASS changePer NCERT, when zinc reacts with dilute HCl to form zinc chloride + hydrogen gas, would conservation of mass b