Question 2 :
Breaking of lead bromide into lead and bromine is an example of _____.

Question 3 :
Which substance is serving as a reducing agent in the following reaction?<br/><br/>&#160; &#160; $FeSO_4+Mg\rightarrow MgSO_4+Fe$

Question 5 :
Which of the statements about the reaction below are incorrect ?<br/>$2PbO(s) + C(s) \rightarrow 2Pb(s) + CO_2(g)$<br/><br/>(a) Lead is getting reduced.<br/>(b) Carbon dioxide is getting oxidised.<br/>(c) Carbon is getting oxidised.<br/>(d) Lead oxide is getting reduced

Question 6 :
Identify&#160;the reducing agent in the redox reaction<br/><br/>$5SO^{2-}_3+ 2MnO^{-}_4 +6H^{+} \rightarrow 5SO^{2-}_4 +2Mn^{2+} +3H_2O$

Question 7 :
Write the type of reaction.<br/>Ethene is burnt in the presence of oxygen to form carbon dioxide, water and releases heat and light.<br/>

Question 10 :
Identify the product(s) which will be formed by using the information provided about the reactants :<br/>${C}_{4}{H}_{10}(g)+{O}_{2}(g) \rightarrow$

Question 13 :
Assertion: In a reaction<br/><br/>$Z n ( s ) + CuSO_4 (aq) \rightarrow ZnSO_4 (aq) + Cu(s)$<br/><br/>Zn is a reductant but itself get oxidized. Reason: In a redox reaction, oxidant is reduced by accepting electrons and reductant is oxidized by losing electrons.

Question 14 :
The law of conservation of mass is valid for which of the following?<br/>(a)&#160;Reactions involving oxidation.<br/>(b)&#160;Nuclear reactions.<br/>(c) Endothermic reactions.

Question 16 :
Select the correct alternative.Which of the following is a decomposition reaction?

Question 20 :
Chlorine gas is passed in an aqueous potassium iodide&#160;solution to form potassium chloride solution and solid iodine. Identify the type of the reaction:<br/>

Question 21 :
When nitrogen reacts with hydrogen&#160;under high temperature and&#160;pressure to form ammonia gas. This is an example of:

Question 22 :
In the reaction between zinc and iodine, zinc iodide is formed. What is being oxidized?

Question 25 :
Match the item of Column I with the item of the Column II<br><table class="wysiwyg-table"><tbody><tr><td>Column I</td><td>Column II</td></tr><tr><td>a) $N{H}_{4}OH+C{H}_{3}COOH \longrightarrow C{H}_{3}COON{H}_{4}+{H}_{2}O$</td><td>(i) Thermal decomposition</td></tr><tr><td>b) $2AgBr \longrightarrow 2Ag+{Br}_{2}$</td><td>(ii) Thermit reaction</td></tr><tr><td>c) $ZnC{O}_{3} \longrightarrow ZnO+C{O}_{2}$</td><td>(iii) Photochemical reaction</td></tr><tr><td>d) $2Al+{Fe}_{2}{O}_{3} \longrightarrow 2Fe+{Al}_{2}{O}_{3}$</td><td>(iv) Neutralization reaction</td></tr></tbody></table>

Question 26 :
Which of the following statement is incorrect about the given reaction?<br/>$3Fe+4H_2O\rightarrow Fe_3O_4+4H_2$

Question 31 :
Name the type of following chemical reaction.$CaCO_3 \rightarrow CaO + CO_2$

Question 33 :
On heating blue coloured powder of copper(II) nitrate in a boiling&#160;tube copper oxide (black), oxygen gas and a brown gas X is formed.&#160;Which type of reaction is this?<br/>

Question 34 :
In an oxidation process for a cell,<br>$M_1 \rightarrow{ M }_{ 1 }^{ n+ } + ne^- $<br>the other metal $(M_2)$ being univalent showing reduction takes up _____ electrons to complete redox reaction.

Question 36 :
What happens when a piece of&#160;zinc metal is added to copper sulphate solution ?<br/>

Question 38 :
A chemistry student is attempting to decompose hydrogen peroxide as follows:<br>$H_{2}O_{2(g)} \rightarrow H_{2(g)} + O_{2(g)}$<br>What can the chemistry student do to increase the rate of decomposition?

Question 39 :
Name the type of following chemical reaction.<br/>$PbO_2 + SO_2 \rightarrow PbSO_4$

Question 40 :
Name the type of following chemical reaction.$KNO_3 + H_2SO_4 \rightarrow HNO_3 + KHSO_4$

Question 41 :
In the context of redox reactions, the gain of hydrogen from a substance is known as:

Question 42 :
The chemical equation $Ba{ Cl }_{ 2 }+{ Na }_{ 2 }S{ O }_{ 4 }\rightarrow BaS{ O }_{ 4 }+2NaCl$ represents following type of chemical reaction.

Question 45 :
The reaction between carbon and oxygen can be represented as $C_{(s)}+O_{2(g)}\rightarrow CO_{2(g)}+heat$.<br/><br/>In which of the following type(s), the above reaction can be classified?<br/>I. Combustion reaction<br/>II. Displacement reaction<br/>III. Endothermic reaction<br/>IV. Combination reaction.<br/>

Question 46 :
$H_{2}S$ is passed through an acidified solution of copper sulphate and a black precipitate is formed. This is due to:

Question 48 :
In a change hydrogen peroxide gives rise' to hydrogen oxide and oxygen. This is an example of:

Question 49 :
Write 'true' or 'false' for the following statement:<br>When potassium iodide solution is added to lead acetate solution a red precipitate is formed

Question 50 :
When lead ($Pb$) is reacted with&#160;the hydrochloric acid a gas is evolved. Name the gas.<br/>