please answer this chemistry questions
Answers
Answer:
1. a) Double Displacement reaction and for next equation it's Double Displacement reaction
b) Some old exposed iron articles are corroded due to formation of rust. The chemical formula for rust is Fe2O3 and is commonly known as ferric oxide or iron oxide. The final product is a series of chemical reactions simplified below as- The rusting of the iron formula is simply
4Fe + 3O2 + 6H2O → 4Fe(OH)3.
2. (a) both assertion and reason are true and Reason is the correct explanation of Assertion
3. The reaction in Test tube A is:
Zn + 2NaOH ---> Na2ZnO2 + H2
The Reaction in Test tube B is:
Zn + 2HCl ---> ZnCl2 + H2
The the gas evolved after reaction of acid with metal can be tested by bringing a lighted candle near it. if the gas burns with pop sound, then it confirms the evolution of hydrogen gas burning with pops on district characteristic test for hydrogen gas
4. (a) Decomposition reaction
(b) Combination reaction
(c) Single Displacement reaction
5. The X gas is CO2 which is used in photosynthesis.
The following reaction Takes place when Carbon dioxide is passed into Quick lime:
CaO + CO2 -> CaCO3
The Following reaction Takes place when Calcium Carbonate is heated:
CaCO3 -> CaO + CO2
Differences:
• First reaction is Combination Reaction
• second reaction is Decomposition reaction
The Compund 'Z' that is CaCO3, it's characteristics are is that it is soft and Nonabrasive Filler.
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