please give me MCQ of chemical reactions and equations class 10 plz no spams I am tired of reporting spamers 20 YEARS OF BAD LUCK TO SPAMERS
Answers
Answer:
1. Magnesium ribbon is rubbed before burning because it has a coating of
(a) basic magnesium carbonate
(b) basic magnesium oxide
(c) basic magnesium sulphide
(d) basic magnesium chloride
2.Which of the following statements about the given reaction are correct?
3Fe (s) + 4H2O (g) → Fe3O4 (s) + 4 H2 (g)
(i) Iron metal is getting oxidised
(ii) Water is getting reduced
(iii) Water is acting as reducing agent
(iv) Water is acting as oxidising agent
(a) (i), (zi) and (iii)
(b) (in) and (iv)
(c) (i), (ii) and (iv)
(d) (ii) and (iv)
3.Which of the following are exothermic processes?
(i) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)
4.Oxidation is a process which involves
(a) addition of oxygen
(b) addition of hydrogen
(c) removal of oxygen
(d) removal of hydrogen
5.Which of the following is a displacement reaction?
(a) MgCO3-->MgO+CO2
(b) 2Na+2H2O-->2NaOH+H2
(c) 2H2+O2-->2H2O
(d) 2Pb(NO3)2-->2PbO+4NO2+O2
Explanation:
Answer:
1.basic magnesium oxide