Question

hi friends ♥ answer 5,6,7,8,9,questions I need fast so pls fast....... ​

Answer 1

Hi mate,

Here is your answer,

5) 1. FeCl2 + Zn = ZnCl2 + Fe , as zinc is more reactive than iron .

   2. ZnCl2 + Fe = ZnFe + Cl2 , as zinc more reactive than both the element .

6) A chemical equation is made informative by mentioning all the conditions required in the chemical reaction .

8) Na2SO4 + BaCl2 = BaSO4 + NaCl

  Balanced chemical equation ,

   Na2SO4 +BaCl2 = BaSO4 + 2NaCl

9) 1. 2Al + Fe2O3 = Al2O3 + 2Fe

   2. 5C6H12O6 + 15O2 = 30CO2 + 3H2O + Heat energy

   3. 4C3H8 + 17O2 = 12CO2 + 10H2O

   4. 6CO2 (g) + 6H2O(l) = C6H12O6 + 6O2

   5. 2Fe2O3 + 3C = 2Fe + 3CO2

   6. 2PbO + C = 2Pb + CO2

7) a) The apparatus used is test tubes and litmus papers separately and the chemicals used is acidic solutions and basic solution .

  b) Acidic solution turns blue litmus into blue while basic solution turns red litmus into blue .

  c) When an acid reacts with a metal , it liberates hydrogen gas .

                Zn(s) + 2HCl (aq) = ZnCl2 (aq) + H2 (g)

  d) From the above experiment ,to test the presence of H2 gas , bring a burning splinter near the mouth of the test tube where H2 gas is released , the matchstick bums with a pop sound .

I hope you like my answer...................!