Question 1 :
A chemical reaction in which heat is evolved is called a/an:<br/>
Question 2 :
$FeCl_3 + 3NaOH \rightarrow 3NaCl + Fe(OH)_3$<br/><br/>The reaction is an example of________.
Question 8 :
AB + CD $\rightarrow$ AD + BC<br/><br/>The reaction is an example of _________.<br/><br/><br/>
Question 9 :
Other signs of a chemical reaction might be an increase in temperature if heat is released or a change in _____.
Question 11 :
The reaction of hydrochloric acid with zinc oxide to form zinc chloride and water is neutralization reaction. State whether the statement is true or false
Question 14 :
What is the difference between displacement over double displacement reactions ?
Question 16 :
An oxidizing agent is always takes part in the reduction process while a reducing agent is always take part in the _______ process.
Question 19 :
The substance that initially involved in a chemical reaction is called a reactant.
Question 20 :
Name the type of the following chemical reaction.$2KClO_3 \rightarrow 2KCl +3O_2$
Question 22 :
Three cations $A, B, C$ are allowed to react with ammonium hydroxide solution. $A$ and $B$ produce a dirty green precipitate and a reddish brown precipitate respectively, both of which do not dissolve on further addition of ${NH}_{4}OH$. $C$ gives pale blue colour precipitate with less amount of ammonium hydroxide and on further addition of ${NH}_{4}OH$, precipitate becomes soluble and deep blue colour solution is formed:
Question 24 :
$KXO_3$(s) well mixed with water, temperature of solution falls. This reaction is:<br/>
Question 25 :
State true or false.<br/>In a chemical equation, the products are written on the left-hand side and the reactants on the right-hand side with an arrow in between.
Question 26 :
State true or false.<br/><br/>In redox reactions, oxidation and reduction take place simultaneously.<br/>
Question 27 :
Balanced chemical equations imply which of the following?<br>$I$. Numbers of molecules are conserved in chemical change<br>$II$. Numbers of atoms are conserved in chemical change.<br>$III$. Mass is conserved in chemical change.
Question 28 :
Which of the following symbol is used to show solid precipitate?
Question 31 :
In $HS^, I^, R-NH_2, NH_3$ order of proton excepting tendency will be:
Question 33 :
Which of the following reaction requires oxygen to be a reactant ?
Question 34 :
In the reaction, $4Fe+3O_2\rightleftharpoons 4Fe^{3+}+6O^{2-}$ Which of the following statements is incorrect?
Question 35 :
Which type of chemical decomposition reaction is the following reaction?<br>$Cu(OH)_2\xrightarrow {heat} CuO+H_2O$
Question 36 :
Identify the type of reaction which will occur based on the information provided about the reactants:<br>${CH}_{4}(g)+{O}_{2}(g)\rightarrow$
Question 37 :
When chlorine reacts with sodium bromide the solution turns brown because ________.
Question 39 :
Which of the following is an example of the exothermic reaction ?
Question 40 :
A less reactive metal replaces a more reactive metal from its salt solution in water.<br>
Question 41 :
Reaction of iron nails with copper sulphate solution is an example of ____________.
Question 43 :
The conversion of ${Cr}_{2}{O}_{7}^{2-}$ to ${Cr}^{3+}$ during a chemical reaction is an example of:
Question 44 : <p>Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of :</p>
Question 46 :
Aqueous solutions of magnesium chloride and silver nitrate are mixed to form solid silver chloride and aqueous magnesium nitrate.<br/><br/>The balanced molecular equation contains which one of the following terms?
Question 47 :
Identify the reaction from the following in which physical and chemical changes are occurring:
Question 49 :
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 50 :
Which of the following is (are) not an example of a decomposition reaction?
Question 51 :
Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning sulphur. Identify the type of reaction.<br/>
Question 52 :
Give an example of each of the following chemical changes: An endothermic reaction <br/>
Question 53 :
The chemical equation $Ba{ Cl }_{ 2 }+{ Na }_{ 2 }S{ O }_{ 4 }\rightarrow BaS{ O }_{ 4 }+2NaCl$ represents following type of chemical reaction.
Question 55 :
$\displaystyle CuO+{ H }_{ 2 }\longrightarrow { H }_{ 2 }O+Cu$, reaction is an example of :<br/>
Question 56 :
Select the correct alternative.<br/>The reaction between acid and base to form salt and water is an example of :
Question 57 :
Reaction of iron nails with copper sulphate solution is an example of:<br>
Question 58 :
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 60 :
$CaC{ O }_{ 3 }\xrightarrow { \quad \quad \Delta \quad \quad  } CaO+C{ O }_{ 2 }\uparrow $ is a ________ reaction.
Question 61 :
The standard reduction potentials at 298 K for the following half reactions are given against each<br/>$Zn^{2+}(aq)+2e\rightleftharpoons Zn(s)\ -0.762$<br/>$Cr^{3+}(aq)+2e\rightleftharpoons Cr(s)\ -0.740$<br/>$2H^+(aq)+2e\rightleftharpoons H_2(g)\ 0.000$<br/>$Fe^{3+}(aq)+2e\rightleftharpoons Fe^{2+}(aq)\ 0.770$<br/>Which is the strongest reducing agent?
Question 63 :
How many molecules of $CO_2$ are formed when one molecule of $C_6H_{12}O_6$ is oxidised in our body?
Question 66 :
The activity of the metal barium is between that of sodium and potassium. It is likely that:
Question 67 :
Four hypothetical metallic elements $A, B, C$ and $D$ forms soluble nitrates having formulae $ANO_3, B(NO_3)_2, CNO_3$ and $D(NO_3)_3$.<br/>Strips of each of the four metals were immersed in $0.1\ M$ aqueous solution of the other metal nitrates, and the following observations recorded.<br/>1. Metal $B$ underwent reaction in all solutions.<br/>2. Metal $A$ only reacted with $CNO_3$.<br/>In order of increasing strength as reducing agents, the metals are :
Question 68 :
When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remains in the solution. The reaction is an example of:<br/>
Question 69 :
In the context of redox reactions, the gain of hydrogen from a substance is known as:
Question 70 :
Identify the type of the reaction.Potassium + Iron oxide $\rightarrow$ Potassium oxide + Iron
Question 71 :
Name the type of following chemical reaction.$CaCO_3 \rightarrow CaO + CO_2$
Question 72 :
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 73 :
What type of a chemical reaction is used to extract several metals from their naturally-occuring compounds like oxides or chlorides?
Question 74 :
The digestion of food in the body is an example of __________ reaction.
Question 78 :
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 79 :
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 80 :
When nitrogen reacts with hydrogen under high temperature and pressure to form ammonia gas. This is an example of:
Question 82 :
Which of the following statement is incorrect about the given reaction?<br/>$3Fe+4H_2O\rightarrow Fe_3O_4+4H_2$
Question 84 :
In the reaction between zinc and iodine, zinc iodide is formed. What is being oxidized?
Question 85 :
Many grain products, including cereals and others that identify themselves as a 'source of iron'. List something called "reduced iron" among the ingredients.<br/>To which of the following would the term "reduced iron" most likely be referring?
Question 86 :
Exposure of silver bromide to sunlight for a long duration turns grey due to:
Question 88 :
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 91 :
Which of the following is(are) an endothermic process(es) ?<br>(i) Dilution of sulphuric acid<br>(ii) Sublimation of dry ice<br>(iii) Condensation of water vapours<br>(iv) Evaporation of water<br>
Question 92 :
What happens when a piece of zinc metal is added to copper sulphate solution ?<br/>
Question 93 : <p>Reaction of iron filings with powdered sulfur is a _____ process.<br/></p>
Question 94 :
$Zn + 2 HCl \rightarrow ZnCl_2 + H_2 \uparrow$<br/>The above reaction is an example of:<br/>
Question 96 :
Which substance is serving as a reducing agent in the following reaction?<br/><br/>    $FeSO_4+Mg\rightarrow MgSO_4+Fe$
Question 97 :
Which of the following chemical reaction is balanced as well as is combustion reaction?
Question 98 :
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 100 :
The reaction, when balanced, $m, n, p$ and $q$ are respectively:<br/>$K_2Cr_2O_7+ \ m FeSO_4+n H_2SO_4\rightarrow Cr_2(SO_4)_3+pFe_2(SO_4)_3+K_2SO_4+qH_2O$ 
Question 101 :
How much $CaO$ is to be added to the furnace charge for each $1280\ kg$ of pure $CaC_{2}$ produced ?
Question 102 :
If the value of $n$ is $2$, then the atomic weight of metal $M$, is
Question 103 :
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 104 :
How many grams of ammonium nitrate will be formed in the reaction?
Question 105 :
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 106 :
What is not a mole ratio of $ \displaystyle 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$? <br/>
Question 107 :
What amount of $BaSO_4$ can be obtained on mixing 0.5 mole $BaCl_2$ with 1 mole of $H_2SO_4$ ?
Question 108 :
Consider the following statements.<br/><br/>1. If all the reactants are not taken in their stoichiometric ratio, then at least one reactant will be left behind.<br/><br/>2. 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 110 :
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 $ABC_3 \rightarrow AB +C_2$ 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) Thus the coefficients of $ABC_3$, AB and $C_2$ in the balanced chemical equation will be 2,2 & 3 respectively and the balanced chemical equation can be represented as :$2ABC_3 \rightarrow 2AB +3C_2$Now answer the following question.<br/> <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 CO and $CO_2$ . What would be the weight ratio of CO and $CO_2$  in mixture?
Question 112 :
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 113 :
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 114 :
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 116 :
The equation which is balanced and represents the correct product is:
Question 120 : 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 121 :
What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? [Note : Relative molecular mass of $NH_4NO_3$ is 80]
Question 124 :
What is the minimum mass of ${ CaCO }_{ 3 }(s)$, below which it decomposes completely, required to established equilibrium in a $6.50\ litre$ container for the reaction:<br/>${ CaCO }_{ 3 }(s)\rightleftharpoons CaO(s)+{ CO }_{ 2 }(g);\space { K }_{ c }=0.005\ mole/litre$<br/>
Question 125 :
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 126 :
Minimum amount of $Ag_2CO_3$ (s) required to produce sufficient amount of oxygen for the complete  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/>
