Question

pls help me....I need answers for these questions..​

Answer 1

Answer:

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Answer 2

Explanation:

Q7,Accirding to law of conservation of mass ,chemical reaction will be balanced such that no of moles of reactants= moles of product

Q8,

Q9,its colour fades away when exposed to sunlight

Q10,When 2 or more elements combine to form a product,it leads to combination reaction

ex :C+O2------>CO2

Q11,We observe its a precipitation reaction,forming potassium nitrate as a precipitate.

see attachment for balanced reaction.

Q12,In exothermic reaction,heat is evolved(generated) whereas in endothermic heat is absorbed

Q13,In displacement reaction, a metal of high reactivity series displaces other metal from its salt solution.Ex Zn displace Cu from CuSO4

in reaction

Zn+CuSO4--------->ZnSO4+Cu

In double displacement reactions just like in q 11,precipates form and each metal /element exchanges...

Q14Based on my knowledge,,nitrogen will prevent the growth of bacteria on food

Q15,decomposition of compound into 2/more products in the presence of electrolyte is called electrolytic decomposition