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VGS PUBLICATION-BRILLIANT-ATOMS ,MOLECULES AND CHEMICAL REACTIONS-EXERCISE
- What is the molecular formula of water ?
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- What is the molecular mass of water?
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- What are the units of molecular mass ?
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- Define the terms : Mole.
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- What is the molecular mass of water?
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- What are.the units of molar mass?
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- How many molecules are there in 18 grams of water?
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- How many molecules are there in 18 grams of water?
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- We write symbol of water as H2O. State why should not we write it HO2'...
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- A shiny brown coloured element 'X' on heating in air becomes black in ...
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- A student was given the following substances and was asked to show typ...
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- Why does respiration considered as an exothermic reaction ? Explain.
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- Is 'Na' an element or compond? Why
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- Is O2 an element or compound? Why
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- ''Freshly cut apple turning brown, the iron articles shiny when new, b...
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- Take two beakers and prepare lead nitrate aqueous solution and potassi...
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- Latha take some quantity of powder of a substance in a test tube. Heat...
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- A light-yellow colour substance (some quantity) on a watch glass light...
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- What is the unit of atomic mass?
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- On the basis of molecular weights of NaOH and H2O, which is heavier?
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