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Class 10 Science Chapter 1 Chemical Reactions And Equations Quiz 5 (60 MCQs)

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1. DECOMPOSITION REACTION IS OPPOSITE TO ..... REACTION.
2. 4NO$_{2 }$is called
3. A ..... equation has equal number of atoms of diferrent element in reactant and product
4. Which among the following is(are) double displacementreaction(s)?(i) Pb + CuCl2 $\rightarrow$ $\rightarrow$ $\rightarrow$ $\rightarrow$
5. The chemical reaction involved in the corrosion of iron metal is that of
6. The following is an example of:4NH$_{3}$ + 5O$_{2}$ ..... > 4NO + 6H$_{2}$O (i) displacement reaction(ii) combustion reaction (iii) redox reaction (iv) neutralization reaction
7. Identify the type of chemical reaction:NaHCO$_{3 ..... >}$ Na$_{2}$CO$_{3}$ + H$_{2}$O + CO$_{2}$
8. When ethane reacts with oxygen present in air it produces CO$_{2}$ and water. In this reaction how many moles of oxygen is used?
9. CaO + H$_{2}$O ..... > Ca(OH)$_{2}$This is an example of
10. The following reaction is an example of a 4NH3(g) + 5O2(g) $\rightarrow$ 4NO(g) + 6H2O(g)(i) displacement reaction (ii) combination reaction (iii) redox reaction (iv) neutralisation reaction
11. A powdered salt X was heated in a dry test tube and evolution of brown fumes of nitrogen dioxide and a yellow residue of lead oxide is formed. The salt X is:
12. Which of the following type of chemical reaction is only possible with Oxygen as a reactant?
13. What happens when carbon dioxide is passed in lime water?
14. When a single compound breaks down to produce two or more simple substances it is called .....
15. Suppose two substances were combined together in a beaker. You know that a chemical reaction occurred if:
16. CuO+H2 ..... >Cu+ H2OFIND THE OXIDIZING AGENT
17. A substance produced during a chemical reaction
18. When crystals of lead nitrate are heated strongly in a dry test tube
19. The removal of oxygen from a substance is called
20. 1 one of the following does not happen during a chemical reaction. This is
21. Which of the following is NOT true regarding a properly written chemical equation?
22. Which of the following is NOT an example of a possible type of displacement reaction?
23. Which of the following is endothermic reaction?
24. In a chemical equation, the formula of a substance in water solution is followed by the symbol
25. What is the another name of quick lime?
26. Name the gas which is responsible for the brown fumes during the decomposition of Lead Nitrate?
27. What is the arrow in a chemical equation ..... H$_{2 + }$O ..... > H$_{2}$O
28. Colour of Ferrous Sulphate crystals is:
29. In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of:
30. In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called .....
31. The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called:
32. Which is the reducing agent in the following agent?3MnO$_{2}$ (s) + 4HCl (aq) ..... > MnCl$_{2}$ (s) + 2H$_{2}$O (l) + Cl$_{2}$ (g)
33. What colour is ferrous sulphate
34. When ferrous sulphate is heated strongly it undergoes thermal decomposition reaction to produce .....
35. Consider equation:Ca $^{+2}$ + 2OH$^{-}$ ..... > Ca(OH)$_{2}$Precipitate of Calcium hydroxide will be in what colour?
36. The reaction between nitrogen and hydrogen to give ammonia is an example of a combination reaction.
37. A reddish brown coloured metal used in electric wires, when powdered and heated strongly in an open Chinadish, its colour turns black. When hydrogen gas ispassed over this black substances, it regain its originalcolour. Based on this information, the metal and blackcoloured substances are
38. Name the product formed when CaO reacts with water
39. MnO$_{2}$ + 4HCl $\rightarrow$MnCl$_{2}$ + 2H$_{2}$O + Cl$_{2}$Identify the substance oxidized in the above equation.
40. Name the products formed when iron filings are heated with dilute hydrochloric acid
41. A substance 'X' is used in whitewashing and it is obtained by heating Limestone in the absence of air. Identify 'X':
42. When a magnesium ribbon is burnt in air, the ash formed is
43. On immersingan iron nail in CuSO4 solution you will observe:
44. Fatty foods become rancid due to the process of
45. 2Cu +O2 =2 CuO when heated.Name the reaction
46. Which of the following observations helps to determine that a chemical reaction has taken place?
47. When S02 gas is passed through saturated solution of H2S, which of the following reaction occurs?
48. How can the black coating of Copper oxide be removed chemically?
49. What happens when a piece of Cu is put into a solution of magnesium chloride?
50. What is the role of a catalyst in a chemical reaction?
51. A solution of X is used for white washing walls. it reacts slowly with Y in air to form a thin layer of B on walls which gives walls a shiny finish. which of the following options correctly represents X, Y and B?
52. REDOX REACTION MEANS
53. Chemical Reaction between quick lime and water is:
54. True or False:Neutralization reaction is a type of Double Displacement Reaction.
55. Combination of phosphorus and oxygen is an example of-
56. Which of the following does not corrode when exposed to the atmosphere-
57. Which of the following is NOT an Exothermic Reaction?
58. When Lead nitrate is heated strongly in a dry test tube, what happens?
59. The number of atoms of each element is not conserved in any chemical reaction.
60. Oxidation is the loss of electrons from a substance.
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