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Class 11 · Chemistry
→A student says (CO) and (CO_2) are only an example of definite proportions. What is a better answer?
Class 11 · Chemistry
→In which example is multiple proportions used correctly?
Class 11 · Chemistry
→If pure samples of (CaO) have same calcium oxygen ratio everywhere which law is it?
Class 11 · Chemistry
→A student applied definite proportions to sea water. What is the correct correction?
Class 11 · Chemistry
→Two samples of a pure compound have the same percentage composition. Which law applies?
Class 11 · Chemistry
→If composition of a material changes from sample to sample why is it not a good example of definite proportions?
Class 11 · Chemistry
→In which example is definite proportions used correctly?
Class 11 · Chemistry
→A student assumes mass of each product equals mass of each reactant. What is the mistake?
Class 11 · Chemistry
→If total matter is 100 grams before reaction and 100 grams after reaction what conclusion is correct?
Class 11 · Chemistry
→In which situation will experimental verification of conservation of mass be best?
Class 11 · Chemistry
→If gas escapes from an open bottle during reaction what is the correct comment on conservation of mass?
Class 11 · Chemistry
→A student says mass disappears when gas forms. What is the correct correction?
Class 11 · Chemistry
→If an 80 gram compound contains 20 grams B what is the percentage of B?
Class 11 · Chemistry
→If a 72 gram compound contains 18 grams A what is the percentage of A?
Class 11 · Chemistry
→If gaseous volumes are 9 litres and 12 litres what is the simple ratio?
Class 11 · Chemistry
→If gaseous volumes are 14 litres and 7 litres what is the simple ratio?
Class 11 · Chemistry
→In two compounds masses of B are 20 grams and 50 grams while A is fixed. What is the simple ratio?
Class 11 · Chemistry
→In two compounds fixed 12 grams A combines with 18 grams and 24 grams B. What is the ratio of B?
Class 11 · Chemistry
→If a sample has A:B as 9:6 what is the simple ratio?
Class 11 · Chemistry
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