Chapter 1 : Chemical Reactions and Equations
1 / 50
Which reaction involves both oxidation and reduction?
2 / 50
Which gas is evolved when magnesium reacts with dilute acid?
3 / 50
Which of the following reactions gives a precipitate?
4 / 50
Which process helps in preventing corrosion?
5 / 50
Which reaction is represented by A + BC → AC + B?
6 / 50
Which metal oxide is reduced by hydrogen?
7 / 50
Which of the following reactions is used in photography?
8 / 50
What is the color of silver chloride precipitate?
9 / 50
Which gas is used in oxidation reactions?
10 / 50
Which reaction occurs when sodium sulphate reacts with barium chloride?
11 / 50
Which of the following is a physical change?
12 / 50
What is the formula of rust?
13 / 50
Which reaction takes place in digestion of food?
14 / 50
Which chemical is formed when quicklime reacts with water?
15 / 50
Which reaction releases energy in the form of heat?
16 / 50
Which law is followed while balancing chemical equations?
17 / 50
Which metal is deposited when iron nail is dipped in copper sulphate solution?
18 / 50
Which type of reaction is represented by 2AgCl → 2Ag + Cl2?
19 / 50
Which gas is evolved when acids react with carbonates?
20 / 50
In the reaction Fe + CuSO4 → FeSO4 + Cu, iron is:
21 / 50
Which of the following shows corrosion?
22 / 50
Which compound is used to prevent rancidity in chips packets?
23 / 50
Which reaction is endothermic?
24 / 50
What is the color of iron sulphate crystals?
25 / 50
Which of the following is a redox reaction?
26 / 50
Which gas turns lime water milky?
27 / 50
Which reaction involves exchange of ions?
28 / 50
Which metal prevents rusting when coated on iron?
29 / 50
What is formed when silver chloride is exposed to sunlight?
30 / 50
Which reaction occurs when electricity is passed through water?
31 / 50
The substance that gets reduced gains:
32 / 50
Which reaction is used in whitewashing walls?
33 / 50
What is the color of copper sulphate solution?
34 / 50
Which of the following reactions is exothermic?
35 / 50
Which gas causes bread and cakes to rise?
36 / 50
Which of the following is a displacement reaction?
37 / 50
Rust is mainly composed of:
38 / 50
Which reaction produces white precipitate?
39 / 50
Which indicator shows a rise in temperature during a reaction?
40 / 50
What is rancidity?
41 / 50
The balanced form of H2 + O2 → H2O is:
42 / 50
Which metal is more reactive than copper?
43 / 50
What happens during oxidation?
44 / 50
Which of the following is an example of decomposition reaction?
45 / 50
The process of depositing a layer of brown copper on iron is called:
46 / 50
Which substance is oxidized in the reaction: CuO + H2 → Cu + H2O?
47 / 50
What type of reaction is represented by: CaO + H2O → Ca(OH)2?
48 / 50
Which gas is evolved when zinc reacts with dilute hydrochloric acid?
49 / 50
What is the chemical formula of magnesium oxide?
50 / 50
Which of the following is a chemical change?
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