Question 2 : <span>On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite, a white precipitate is obtained. </span><div><span><br/></span></div><div><span>What is the</span> balanced chemical equation of the reaction involved?<br/></div>
Question 3 :
The reaction of nitrogen with oxygen to form nitric oxide is :<br/>
Question 5 :
Which of the following is not an example of single displacement reaction?<br>
Question 6 : Identify the type of the reaction.<div>Potassium + Iron oxide $\rightarrow$ Potassium oxide + Iron</div>
Question 7 :
Pieces of copper, silver and gold are dropped into a solution of iron sulphate. The piece that will get a coating of copper is:
Question 8 :
Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The following observations are recorded. Point out the correct observation.
Question 10 : Potassium hydroxide + Hydrochloric acid $\rightarrow$ Potassium chloride +  Water <br/><div>This is a:</div>
Question 11 :
For a reaction $A+B\leftrightarrows  C+D$, if the activation energy of backward reaction is more than that of forward reaction, the forward reaction is :
Question 14 :
$Zn + 2HCI \rightarrow ZnCl_2 + H_2$ is an example of:<br/>
Question 15 :
What do you observe when $H_2S$ gas is passed through cadmium chloride solution? Name the type of reaction:
Question 16 :
$X+Cu{SO}_{4}\longrightarrow X{SO}_{4}+Cu, Y+Cu{SO}_{4}\longrightarrow Y{SO}_{4}+Cu$ in these reactions $X$ and $Y$ may be ________.
Question 17 : <p class="MsoNormal"><span>Which of the following processes can not take place in the absence </span><span>of </span><span>oxygen?</span></p><p class="MsoNormal"><span></span></p>
Question 18 : What type of chemical reaction is it?<div>Calcium + oxygen $\rightarrow$ Calcium oxide </div>
Question 19 : <div><span>Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773K to form ammonia gas. This reaction is an example of:</span><br/></div>
Question 20 : Name the type of following chemical reaction.<div><br/></div><div>$PbO_2 + SO_2 \rightarrow PbSO_4$</div>
Question 21 : $Fe_{2}O_{3} + \underline {a} \rightarrow \underline {b} + Al_{2}O_{3}$ <div>This is an example of displacement reaction. Find a and b:</div>
Question 22 :
Three beakers labelled as $A,\ B$ and $C$ each containing 25 mL of water were taken. A small amount of $NaOH$, anhydrous $CuSO_4$ and $NaCl$ were added to the beakers $A,\ B$ and $C$ respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers $A$ and $B$, whereas in case of beaker $C$, the temperature of the solution falls. Which one of the following statement(s) is(are) correct ?<br/>(i) In beakers $A$ and $B$, exothermic process has occurred.<br/>(ii) In beakers $A$ and $B$, endothermic process has occurred.<br/>(iii) In beaker $C$ exothermic process has occurred.<br/>(iv) In beaker $C$ endothermic process has occurred.<br/>
Question 23 :
A chemical reaction that takes place with the evolution of heat is called a/an:
Question 24 :
Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning sulphur. Identify the type of reaction.<br/>
Question 27 :
Copper sulphate solution, which is blue in colour, will change to a colourless solution with<span> the addition of which metal</span>?
Question 28 :
The law of conservation of mass is valid for which of the following?<br/>(a) Reactions involving oxidation.<br/>(b) Nuclear reactions.<br/>(c) Endothermic reactions.
Question 29 :
Reaction of iron nail with copper sulphate solution is ___________ reaction.
Question 30 : <span>What is x i</span>n the reaction?<div> $\displaystyle Fe{ SO }_{ 4 }+x\longrightarrow { Na }_{ 2 }{ SO }_{ 4 }+{ Fe\left( OH \right)  }_{ 2 }$</div>
Question 31 :
$Zn + xHCl \rightarrow ZnCl_2 + A$<br/>In above equation A and x are :
Question 32 :
When $SO_{2}$ gas is passed into aqueous $Na_{2}CO_{3}$, product formed is <span>$Na_{2}SO_{3}$, the type of the reaction is :</span>
Question 33 :
Which of the following are exothermic processes?<br>(i) Reaction of water with quicklime<br>(ii) Dilution of an acid<br>(iii) Evaporation of water<br>(iv) Sublimation of camphor (crystals)<br>
Question 36 :
When oxygen gas is either absent or present in low quantity in the solid, in places like stagnant swamps, the soil is said to be in:
Question 38 :
The mixture of carbon and sulphur is separated by using the solution of _________.
Question 39 :
What happens when a piece of zinc metal is added to copper sulphate solution?<br/>
Question 40 :
Acid + Base $\rightarrow$ Salt + Water. This reaction is known as:
Question 42 :
What are the products formed by decomposing calcium phosphate present in bone ash with conc. $H_2SO_4?$
Question 43 :
The phenomenon of formation of simple sugar from starch in our body is the example of which reaction? 
Question 46 :
The decomposition of vegetable into compost is an example of __________ reaction.
Question 47 : <div><span>Identify the type of chemical reaction.</span><br/></div>$TiCl_{4}(l) + Mg(s) \rightarrow  Ti(s) + MgCl_{2}(s)$<br/>
Question 48 :
Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Which among the following is (are) true about slaking of lime?<br>(i) It is an endothermic reaction<br>(ii) It is an exothermic reaction<br>(iii) The pH of the resulting solution will be more than seven<br>(iv) The pH of the resulting solution will be less than seven<br>
Question 49 :
Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride. This is a :<br/>
Question 50 :
Identify the product(s) which will be formed by using the information provided about reactants:<br>$HF(aq)+Ca{(OH)}_{2}(aq)\rightarrow$
Question 52 :
Observe the following reaction. <br/>$ NH_{3(g)} + HCl_{(g)} \rightarrow NH_4Cl_{(s) }$<br/>which of the following is a type of above reaction?
Question 53 : <div>$R-CH = CH_2+CO+CH_3-NH_2 \xrightarrow {H^+, 300^oC, 500\ atm}$</div><div><br/></div>The product formed in the above reaction is :
Question 54 :
$C{ H }_{ 3 }C{ O }_{ 2 }Na+HCl{ O }_{ 4 }\rightarrow C{ H }_{ 3 }C{ O }_{ 2 }H+NaCl{ O }_{ 4 }$<br/>The above reaction can be classified as a<span> :</span>
Question 56 :
Which of the following reactions are possible? <br>i) $Mg+CuSO_4 \rightarrow MgSO_4+Cu$<br>ii) $Ca+MgSO_4 \rightarrow CaSO_4+Mg$<br>iii) $Cu+ZnSO_4\rightarrow CuSO_4+Zn$<br>iv) $Fe+MgSO_4 \rightarrow FeSO_4+Mg$
Question 59 : The rate of a reaction doubles when its temperature changes from $300\ K$ to $310\ K$. Activation energy of such a reaction will be: <div><br/><div>$[R = 8.314\ JK^{-1} mol^{-1}$ and $\log 2 = 0.301]$</div></div>
Question 61 : Observe the reaction:<div><br/>$CaCO_{3(s)} + 2NaOH_{(aq)} \rightarrow Na_{2}CO_{3(aq)} + Ca(OH)_{2(aq)}$<div><br/>Which of the following is a type of above reaction?</div></div>
Question 62 :
<span><span>When sodium hydroxide solution is added to copper sulfate solution, a blue precipitate of copper hydroxide is formed along with sodium sulfate solution. What kind of chemical reaction takes place between them?</span></span><br/>
Question 63 : Identify the type reaction from the following.<div>$H_2CO_3 (aq) \rightarrow H_2O(l) + CO_2(g)$</div>
Question 65 :
<span>A magnesium ribbon is burnt in oxygen to give a white compound $X$ accompanied by </span>the emission<span> of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound $Y$. </span>Write the chemical formula of $X$ and $Y$:<br/>
Question 66 :
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?<br>(i) Displacement reaction<br>(ii) Precipitation reaction<br>(iii) Combination reaction<br>(iv) Double displacement reaction<br>
