D. Questions-Answers
1. Identify the most reactive and the least reactive metals among the following
A1, K, Ca, Cu, Ag
2. Which of the following is a combination reaction?
(a) Cly + 2K1 - 2KCI + 12
67 2K + Cl2 - 2KCI
3. Identify the compound which is oxidised in the following reaction:
HZS - Br2 — 2HBr + S
4. Give an example of an endothermic reaction.
3. Name the type of the following reaction:
N2(8) + 3H2(8) - 2NH3(3)
6. Give an example of a neutralisation reaction.
in the reaction, MnO, + 4HCI MnCl, + 2H2O + Cly, identify the substance which is oxidised and water
is reduced.
0. Sodium hydrogencarbonate on reaction with hydrochloric acid gives sodium carbonate, water and bberates
carbon dioxide.' Write the balanced equation for this statement.
9. Why do we store silver chloride in dark-coloured bottles?
10. Identify the oxidising agent in the following reaction:
3Fe + 4H20 — FeO, + 4H2
11. Write the chemical equation of a double displacement reaction.
12. Why do potato chips' manufacturers fill the packet of chips with nitrogen gas?
Answers
Hi friend...
Answer:
1)most reactive metal - K (pottasium)
Least reactive metal - Ag ( Silver)
2) 2K + Cl2 - 2KCl
3) sorry, question not clear :(
4) Photosynthesis
Energy is taken in the form of
sunlight.
5) Combination Reaction
6) Neutralisation Reaction-
2HCl + Na(OH)2 = NaCl2 + 2H2O
7) HCl is oxidised because of
removal of Hydrogen.
8) Na(HCO3) + HCl = NaCl + H2O + CO2
9) When silver chloride comes in contact with sunlight, it decomposes to form silver and chlorine. This is why silver chloride is stored in dark bottles.
10) water. ( H2O)
11) 2KBr + BaI2 = BaBr2 + 2KI
12) They fill packets of potato chips with nitrogen gas to reduce rancidity. As nitrogen is non-reactive, it will not react with the food present in the packet.
HOPE YOU FIND IT USEFUL.... :)
PLS FOLLOW IF IT USEFUL.....( ONLY IF U LIKE)...