Question 1 :
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 2 :
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 3 :
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 5 :
$\displaystyle CuO+{ H }_{ 2 }\longrightarrow { H }_{ 2 }O+Cu$, reaction is an example of :<br/>

Question 6 :
Which of the following equations is not an example ofsingle displacementreaction ?

Question 10 :
Given $4NH_3(g)+5O_2(g)\rightarrow 4NO(g)+6H_2O(g)$<br>The above reaction is an example of:<br>(i)displacement reaction<br>(ii) combination reaction<br>(iii) redox reaction<br>(iv)neutralisation reaction

Question 11 :
$Zn + 2 HCl \rightarrow ZnCl_2 + H_2 \uparrow$<br/>The above reaction is an example of:<br/>

Question 12 :
In the reaction between zinc and iodine, zinc iodide is formed. What is being oxidized?

Question 13 :
When calcium nitrate thermally decomposes oxygen is one of the products. Which volume of oxygen is produced under room conditions when $0.50$ mol of calcium nitrate thermally decomposes?

Question 15 :
Breaking of lead bromide into lead and bromine is an example of _____.

Question 17 :
Ferrous sulphate decomposes with the evolution of a gas having&#160;a characteristic odour of burning sulphur. Identify the type of reaction.<br/>

Question 18 :
Many grain products, including cereals and others that identify themselves as a 'source of iron'. List something called &#34;reduced iron&#34; among the ingredients.<br/>To which of the following would the term &#34;reduced iron&#34; most likely be referring?

Question 20 :
The digestion of food in the body is an example of __________ reaction.

Question 23 :
Which of the following are combination reactions?<br>(i)$2 \mathrm{KClO}_{3} \frac{\mathrm{Heat}}{\longrightarrow} 2 \mathrm{KCl}+3 \mathrm{O}_{2}$<br>(ii)$M g O+H_{2} o \rightarrow M g(O H)_{2}$<br>(iii)$4 A 1+3 O_{2} \rightarrow 2 A 1_{2} O_{3}$<br>(iv)$Z n+F e S O_{4} \rightarrow Z n S O_{4}+F e$

Question 25 :
Magnesium ribbon is burnt in an atmosphere of nitrogen gas&#160;to form solid magnesium nitride. This is a :<br/>

Question 29 :
Which of the following is (are) not an example of a decomposition reaction?

Question 30 :
What type of chemical reaction does the reaction belong to?<br/>Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.<br/>

Question 31 :
The chemical equation $Ba{ Cl }_{ 2 }+{ Na }_{ 2 }S{ O }_{ 4 }\rightarrow BaS{ O }_{ 4 }+2NaCl$ represents following type of chemical reaction.

Question 33 :
When lead nitrate is heated, it breaks down into lead monoxide, nitrogen dioxide and oxygen as given below:$2Pb(NO_3)_2\rightarrow 2PbO+4NO_2+O_2$<br/>The above reaction is an example of :

Question 36 :
When zinc is added to $CuSO_4$ solution, copper is precipitated because :<br/>

Question 39 :
$CaC{ O }_{ 3 }\xrightarrow { \quad \quad \Delta \quad \quad &#160;} CaO+C{ O }_{ 2 }\uparrow $ is a ________ reaction.

Question 42 :
Which of the following reaction are disproportion reaction?<br/>a) $2Cu^+\rightarrow Cu^{2+}+Cu^o$<br/>b) $3MnO^{2-}_4+4H^+\rightarrow 2MnO_4^-+MnO_2+2H_2O$<br/>c) $2KMnO_4\xrightarrow []{\Delta}K_2MnO_4+MnO_2+O_2$<br/>d) $2MnO_4^-+3Mn^{2+}+2H_2O\rightarrow 5MnO_2+4H^{+}$

Question 44 :
Magnesium reacts with acids producing hydrogen and corresponding magnesium salts. In such reactions Mg undergoes.

Question 46 :
Which of the following can act only as a reducing agent?<br>

Question 47 :
Reaction of iron nails with copper sulphate solution is an example of:<br>

Question 49 :
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 50 :
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 51 :
A metal ($A$) on heating in nitrogen gas gives compound $B$. $B$ on treatment with ${H}_{2}O$ gives a colourless gas which when passed through $Cu{SO}_{4}$ solution gives a dark blue-violet coloured solution. $A$ and $B$ respectively, are :

Question 54 :
What mass of ammonium nitrate should be heated to produce 8.96 litres of steam?&#160;[Note : Relative molecular mass of $NH_4NO_3$ is 80]

Question 55 :
How many grams of ammonium nitrate will be formed in the reaction?

Question 56 :
The reaction, when balanced, $m, n, p$ and $q$ are respectively:<br/>$K_2Cr_2O_7+ \ m FeSO_4+n H_2SO_4\rightarrow Cr_2(SO_4)_3+pFe_2(SO_4)_3+K_2SO_4+qH_2O$&#160;

Question 57 :
A quantity of $12\ g$ of magnesium is burnt completely in air $(O_{2}=20\%$ and $N_{2}=80\%$ by volume). Which of the following is/are correct statement(s) regarding this combustion?

Question 58 :
The equation which is balanced and represents the correct product is:

Question 59 :
What is the minimum mass of ${ CaCO }_{ 3 }(s)$, below which it decomposes completely, required to established equilibrium in a $6.50\ litre$&#160;container for the reaction:<br/>${ CaCO }_{ 3 }(s)\rightleftharpoons CaO(s)+{ CO }_{ 2 }(g);\space { K }_{ c }=0.005\ mole/litre$<br/>

Question 60 :
What is not a mole ratio of $ \displaystyle 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$? <br/>

Question 61 :
A quantity of 5.68 g of pure $ P_{4}O_{10} $ is dissolved completely in sufficient water and the solution is diluted to 250 ml. Which of the following statement (s) is/are correct?

Question 62 :
Minimum amount of $Ag_2CO_3$ (s) required to produce sufficient amount of oxygen for the complete &#160;combustion of $C_2H_2$ which produces 11.2 L of $CO_2$ at STP after combustion is_________.<br/>$Ag_2CO_3 (s) \, \rightarrow\, 2Ag (s)\, +\, CO_2 (g)\, +\, \dfrac12 O_2 (g)$<br/>$C_2H_2\, +\, \dfrac52 O_2\, \rightarrow\, 2CO_2\, +\, H_2O$<br/>

Question 64 :
For the cell $Zn(s) |Zn^{2+} (aq) || M^{x+} (aq) | M(s)$, different half cells and their standard electrode potentials are given below:<br/><table class="wysiwyg-table"><tbody><tr><td>$M^{x+} (aq/M(s))$</td><td>$Au^{3+} (aq)/Au(s)$</td><td>$Ag^+ \, /Ag(s)$</td><td>$Fe^{3+}(aq)/Fe^{2+} (aq)$</td><td>$Fe^{2+}(aq)/Fe(s)$</td></tr><tr><td>$E^o_{M^{x+}/M^{/(V)}}$<br/></td><td>$1.40$</td><td>$0.80$</td><td>$0.77$</td><td>$-0.44$</td></tr></tbody></table><br/>If $E^o_{Zn^{2+}/Zn} = -0.76 V$, which cathode will give a maximum value of $E^o_{cell}$ per electron transferred ?

Question 65 :
Consider the following statements.<br/><br/>1.&#160;If all the reactants are not taken in their stoichiometric ratio, then at least one reactant will be left behind.<br/><br/>2.&#160;2 moles of $H_2(g)$ and 3 moles of $O_2 (g)$ produce 2 moles of water.<br/><br/>3. If equal weights of carbon and oxygen are taken to produce $CO_2$, then $O_2$ is limiting reagent.<br/><br/>The above statements 1, 2, 3 respectively are (T = True, F = False):

Question 67 :
How much $CaO$ is to be added to the furnace charge for each $1280\ kg$ of pure $CaC_{2}$ produced ?

Question 69 :
We know that balancing of a chemical equation is entirely based on the law of conservation of mass. However the concept of Principle of Atom Conservation (POAC) can also be related to law of conservation of a mass in a chemical reaction. So, POAC can also acts as a technique for balancing a chemical equation. For example, for a reaction&#160;$ABC_3 \rightarrow AB +C_2$&#160;On applying POAC for A, B and C and relating the 3 equation we get : $\dfrac {n_{ABC_3}}{2}=\dfrac {n_{AB}}{2}=\dfrac {n_{C_2}}{3}$ (N= number of moles of X)&#160;Thus the coefficients of $ABC_3$, AB and $C_2$ in the balanced chemical equation will be 2,2 &amp; 3 respectively and the balanced chemical equation can be represented as :$2ABC_3 \rightarrow 2AB +3C_2$Now answer the following question.<br/>&#160;<br/>If the weight ratio of C and $O_2$ present is 1:2 and both of the reactants completely cousumes and form CO and $CO_2$ and we will obtain a gaseous mixture of&#160;CO and $CO_2$&#160;. What would be the weight ratio of CO and $CO_2$&#160; in mixture?

Question 70 :
What amount of $BaSO_4$ can be obtained on mixing 0.5 mole $BaCl_2$ with 1 mole of $H_2SO_4$ ?

Question 71 :
An amount of 0.01 mole of $ SO_{2}Cl_{2} $ is hydrolysed completely in sufficientwater (no gas is allowed to escape out ) and the solution is diluted to 200 ml. Which of the following statement is/are correct? (Ag = 108 )

Question 74 :
A quantity of $6\ g\ NaOH$ and $4.4\ g\ CO_{2}$ is allowed to react to form $Na_{2}CO_{3}$ or $NaHCO_{3}$ or both. Which of the following is correct statement regarding the reaction?

Question 76 :
If the value of $n$ is $2$, then the atomic weight of metal $M$, is

Question 77 :
For the reaction of sodium with water, the balanced equation using the smallest whole numbers has which of the following coefficients?<br/>I. $1$<br/>II. $2$<br/>III. $3$<br/>Select the correct option.<br/>

Question 78 :
A mixture of propane and benzene is burst completely in excess of oxygen at $110^{o}C$. It result the production of equal volumes of $CO_{2}(g)$ and steam (measured under identical pressure and temperature). Which of the following is correct regarding the original mixture?

Question 79 :
Which of the following chemical reaction is balanced as well as is combustion reaction?