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Q.

The drain cleaner, Drainex, contains small bits of aluminium which react with caustic soda to produce dihydrogen. (2Al+2NaOH+2H2O2NaAlO2+3H2) 
What volume (in ml) of dihydrogen at STP conditions will be released when 0.54g of aluminium reacts with Sodium hydroxide solution. (Report the nearest integer value)
(Consider at STP, temperature =273, Pressure=1 atm,V=22.4 Litres )  

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answer is 672.

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Detailed Solution

2 X 27 g of  Al reacts with 6g of  H2

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The drain cleaner, Drainex, contains small bits of aluminium which react with caustic soda to produce dihydrogen. (2Al+2NaOH+2H2O→2NaAlO2+3H2) What volume (in ml) of dihydrogen at STP conditions will be released when 0.54g of aluminium reacts with Sodium hydroxide solution. (Report the nearest integer value)(Consider at STP, temperature =273, Pressure=1 atm,V=22.4 Litres )