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Biology; Chemistry; Physics: Post your doubts here!

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tubes III, IV,V.
Must be Zinc because N displaced Copper but not Magnesium, so it must be less reactive than Mg, but more reactive than Cu.
displacement reaction. fact.
ZnCO3 will decompose to ZnO and CO2

It can also be iron(Fe^2+)
 
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One mole of compound X gives three moles of ions in aqueous solution. Sulfuric acidis H2SO4 and one mole of sulfuric acid can give off twoOne mole of compound X gives three moles of ions in aqueous solution. X reacts with ammonium carbonate to give an acidic gas.

What is compound X?

A Calcium Hydroxide
B Ethanoic Acid
C Sodium Hydroxide
D Sulfuric Acid
~~~~~~~~~~~

I know the answer is D. Sulfuric acid. What I would like to know is why.

sulphuric acid gives two H+ ions, and one SO4^2- ion from one mole
 
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wat r the catalysts that r used in cracking of hydrocarbons?specially the ones used in the apparatus where there is this tube in which there is a cotton plug soaked in hydrocarbon oil leading to a tube that hv a catalyst nd then ethene is collected abv a water tank in a test tube.
 

asd

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wat r the catalysts that r used in cracking of hydrocarbons?specially the ones used in the apparatus where there is this tube in which there is a cotton plug soaked in hydrocarbon oil leading to a tube that hv a catalyst nd then ethene is collected abv a water tank in a test tube.
Aluminium Oxide
 
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