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VGS PUBLICATION-BRILLIANT-ATOMS ,MOLECULES AND CHEMICAL REACTIONS-EXERCISE
- Anitha wrote the formula for oxygen molecule as 2O. Is it correct or n...
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- Ravi wrote the symbols for sodium as “S” and symbol for potassium as...
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- Dheeraj argued that number of molecules in 18 units of water and 18 g...
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- What is atomic mass?
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- 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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