Question 1 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">In a galvanic cell, the reactions taking place in the anodic half cell and the cathodic half cell will be:</p>
Question 2 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Which of the following reaction is used to make a fuel cell ?</p>
Question 3 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">The potential across the metal and the aqueous solution of its ions of unit activity at 298K is known as:</p>
Question 5 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">In which reactants are not contained within the cell but are continuously supplied from external source?</p>
Question 6 :
Assertion: Dry cell is a primary cell and lead storage cell is a secondary cell.<br/>Reason: A primary cell can only be used once while secondary cells are rechargeable.<br/>
Question 9 :
When the electric current is passed through a cell having an electrolyte, the positive ions move towards cathode and negative ions towards the anode. If the cathode is pulled out of the solution then____________.
Question 10 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Following are some of the facts about dry cell</p><p class="wysiwyg-text-align-left">i) It is also called Leclanche cell</p><p class="wysiwyg-text-align-left">ii) It is also called Daniel cell</p><p class="wysiwyg-text-align-left"><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">iii) Electrolyte is a moist paste of NH$_{4}$Cl<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">and ZnCl$_{2}$<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">in starch</p><p class="wysiwyg-text-align-left">iv) Cathodic reaction is</p><p class="wysiwyg-text-align-left"><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">MnO<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">$_{2}$<span class="wysiwyg-font-size-xx-small"><span class="wysiwyg-font-size-xx-small"> <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">(s) + NH$_{4}^{+}$<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"> + e$^{-}\rightarrow $<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">MnO(OH)+NH$_{3}$</p><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p>Select correct facts :</p>
Question 11 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Which one of the following cells can convert chemical energy of $O_{2}$ and $H_{2}$ directly into electrical energy:</p>
Question 12 :
KCl can be used in salt bridge as electrolyte in which of the following cells?
Question 13 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Hydrogen -Oxygen fuel cells are used in space craft to supply:</p>
Question 14 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Which of the following energy changes occur in galvanic cell?</p>
Question 19 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Which of the following statements is true for fuel cells ?</p>
Question 20 :
In a cell, the following reaction takes place: $Fe + CuSO_{4} \rightarrow FeSO_{4} + Cu$. The cell can be represented as:
Question 21 :
Foe the electrochemical cell:<br/>$Zn\left( s \right) |{ Zn }^{ 2+ }\left( aq \right) \parallel { Cl }^{ - }\left( aq \right) |{ Cl }_{ 2 }\left( g \right) |Pt\left( s \right) $<br/>Given : ${ E }_{ { Zn }^{ 2+ }/Zn }^{ o }=-0.76\ Volt$<br/>             ${ E }_{ { Cl }^{ - }/{ Cl }_{ 2 }\left( g \right)  }^{ o }=-1.36\ Volt$<br/>From these data one can deduce that:
Question 23 :
Which of the following reactions is used to make a fuel cell?
Question 24 :
<font color="#333333">State True or False.</font>In an electrode concentration cell, the cell reaction Zn(C$_1$) $\rightarrow$ Zn(C$_2$) will be spontaneous if c$_1$  > c$_2$ .
Question 25 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Daniel cell can be represented in which of the following way?</p>
Question 26 :
What will be the emf of a cell of two hydrogen electrodes, if a negative electrode is in contact with $10^{-8}M\ H^+$ion positive electrode is in contact with $0.025M\ H^+$?
Question 27 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Some of the batteries are rechargeable :</p><p class="wysiwyg-text-align-left">I : Dry cell battery</p><p class="wysiwyg-text-align-left">II : Lead-storage (acid) battery</p><p class="wysiwyg-text-align-left">III : Nickel-cadmium battery</p><p class="wysiwyg-text-align-left">IV : Lithium battery</p><p class="wysiwyg-text-align-left">V : Fuel cell</p><p>Select correct alternates :</p>
Question 28 :
State True or False.<br/>A cell works if its e.m.f. is negative.
Question 29 :
State True or False.<br/>The effect of a change in the concentration of a reactant or product on the cell voltage can be predicted by applying Le-chateliers principle.
Question 30 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">A lead storage battery containing 5.0 L of (1N) $H_{2}SO_{4}$ solution is operated for $9.65\times 10^{5}$ s with a steady current of 100 mA. Assuming volume of the solution remaining constant, normality of $H_{2}SO_{4}$ will:<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"> </p>
Question 32 :
$Ni\, |\, Ni^{2+}\, ||\, Cu^{2+}\, | Cu$<br/>The standard EMF of the above cell is 0.59 V. The standard electrode potential (reduction potential) of the copper electrode is 0.34 V. Calculate the standard electrode potential of nickel electrode.
Question 33 :
Assertion: To obtain maximum work from a galvanic cell charge has to be passed reversibly.
Reason: The reversible work done by a galvanic cell is equal to decrease in its Gibbs energy.
Question 34 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Reaction that takes place at graphite anode in dry cell is:</p>
Question 36 :
The purpose of a salt bridge in a galvanic cell is to:
Question 37 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">Which of the following cells can be used to experimentally determine the reduction potential of Zinc?
Question 39 :
A voltaic cell is represented as ${A}_{(s)}\left| { { A }^{ +2 } }_{ (aq) } \right| \left| { { B }^{ +2 } }_{ (aq) } \right| {B}_{(s)}$. Which of the following statements of false regarding the above cell?
Question 42 :
The rate of change of concentration of any one of the reactants or products at a particular moment of time is known as the ?
Question 43 :
If the rate of reaction increases by 27 times, when temperature is increased by 30 K, then temperature coefficient of the reaction is:
Question 47 :
The rate for the reaction between ionic compounds cannot be determined because they are generally:
Question 48 :
For the reaction $2A+B\rightarrow 3C+D$ which of the following does not express the reaction rate?<br/>
Question 52 :
___________ is the unit for the rate of a chemical reaction.
Question 53 :
Energy produced in a chemical reaction is a specific type of :<br/>
Question 54 :
Why do most chemical reaction rates increase rapidly as the temperature rises
Question 56 :
If reaction A and B are given with Same temperature and same concentration but rate of $A$ is doublethan $B$. Pre exponential factor is same for both the reaction then difference in activation energy $E_{A} -E_{B}$is?<br>
Question 58 :
What is the rate of the reaction for $2A \rightarrow B$ ?<br>
Question 62 :
Which of the following theory is not related to the chemical kinetics?
Question 63 :
The branch of chemistry which deals with the study of chemical reaction rate is known as :
Question 64 :
A reaction has both $\Delta H$ and $\Delta S$ negative. The rate of reaction:
Question 65 :
The rate of reaction for the reaction between ionic compounds cannot be determined because they are generally:
Question 68 :
While plotting decrease in mass against time, a flat curve shows:
Question 69 :
The unit of rate and rate constant are same for a:
Question 70 :
In___________, a reaction product is itself a catalyst for that reaction leading to positive feedback.<br/>
Question 71 :
In a certain reaction, $10$% of the reactant decomposes in one hour, $20$% in two hours. $30$% in three hours and so on the dimensions of the rate constant is:
Question 74 :
The reaction mechanism for the reaction $P\rightarrow R$ is as follows: $P \overset{k_1}\rightleftharpoons Q$ (fast) and ${Q}+{P} \overset{k_2}\rightarrow{R}$ (slow). <br/>The rate law for the main reaction $({P}\rightarrow {R})$ is:<br/>
Question 75 :
In a reaction of acidified hydrogen peroxide with potassium iodide, the concentration of iodine formed rises from $0$ to ${ 10 }^{ -5 }$ $mol$ ${ dm }^{ -3 }$ in $10$ seconds. What is the rate of reaction?
Question 76 :
For a reaction $R \rightarrow P$, the concentration of a reactant changes from $0.05\ M$ to $0.04\ M$ in $30$ minutes. What will be the average rate of reaction in minutes?
Question 77 :
In the pressence of a catalyst, the activation energy of a reaction is lowered by $2 kcal$ at $27^oC$. The rate of reaction will increase by: $ (Antilog 1.43=28)$
Question 78 :
For a reaction, $2NO(g)+{ O }_{ 2 }(g)\rightarrow 2{ NO }_{ 2 }(g)$<br/>Rate $=k{ \left[ NO \right]  }^{ 2 }\left[ { O }_{ 2 } \right] $ if the volume of the reaction vessel is doubled, then the rate of the reaction:
Question 80 :
Reaction; $A+B\longrightarrow C+D$, follows rate law; $rate=k{ \left[ A \right]  }^{ 2 }{ \left[ B \right]  }^{ 2 }$. Starting with initial concentration of $1M$ of $A$ and $B$ each, what is the time taken for concentration of $A$ to become $0.25M$?<br/>Given: $k=2.303\times { 10 }^{ -2 }{ sec }^{ -1 }$ 
Question 81 :
A reaction is represented as $2A + B \mapsto  2C + 3D$. The concentration of C at 10 s is 4 moles $l^{-1}$. The concentration of C at 20 seconds is 5.2 moles $l^{-1}$. The rate of reaction of B in the same time interval could be :<br/>
Question 82 :
The units of rate constant of a reaction when the rate of reaction is directly proportional to the concentration of one of the reactants is:
Question 83 :
Fill up the following with suitable terms.<br/><br/>(i) Activation energy $=$ Threshold energy $-$ _______.<br/><br/>(ii) Half-life period of zero order reaction $=$ ________.<br/><br/>(iii) Average rate of reaction $=$ _______.<br/><br/>(iv) Instantaneous rate of reaction $=$ ______.
Question 86 :
For the decomposition of $N_2O_5$, a table has been provided with time versus concentration. Find the average rate of the reaction in the time interval.<table class="wysiwyg-table"><tbody><tr><td>t(sec)</td><td>$N_2O_5$(mol/L)</td></tr><tr><td>0</td><td>0.0118</td></tr><tr><td>10</td><td>0.0102</td></tr></tbody></table>
Question 87 :
The rate of disappearance of $SO_{2}$ in the reaction, $2SO_{2} + O_{2}\rightarrow 2SO_{3}$ is $1.28\times 10^{-5} M\ s^{-1}$. The rate of appearance of $SO_{3}$ is :
Question 89 :
Change in concentration of product is 0.05 mole $l^{-1}$in 20 seconds. Average rate of reaction is ________.<br/>
Question 90 :
If the door of a refrigerator is kept open in a dosed room then room:
Question 91 :
The initial pressure of the reactant at $500K$,in the reaction $CaCO_3$ <br> $=$ <br> $CaO$ <br> $+$ <br> $CO_2$ is $200mm$. After $20mins$ the pressure is reduced to $150mm$. Find the average rate of the reaction?
Question 92 :
For the chemical reaction $N_2(g)+3H_2(g) \rightleftharpoons 2NH_3(g)$ the correct option is:
Question 94 :
If $\Delta t \rightarrow \ 0$ the average rate changes to _____________.
Question 95 :
For gaseous reaction, the rate is often expressed in terms of dP/dt instead of dc/dt or dn/dt (where c is the concentration and n the number of mol). What is the relation among these three expressions ?
Question 97 :
What is the order of a reaction which has arate expression?<br>$rate=K[A]^{3/2}[B]^{-1}$<br>
Question 98 :
Nitrogen dioxide $(NO_{2})$ dissociates into nitric oxide $(NO)$ and oxygen $(O_{2})$ as follows:<br>$2NO_{2} \rightarrow 2NO + O_{2}$<br>If the rate of decrease of concentration of $NO_{2}$ is $6.0\times 10^{-12} mol\ L^{-1} s^{-1}$. What will be the rate of increase of concentration of $O_{2}$?
Question 99 :
The rate law of gaseous reaction : $ A_{(g)}+B{(g)} \rightarrow $ product is given by $ K[A]^2 [B]$. If the 'V' of one reaction vessel is suddenly doubled, which of the following will happen?
Question 100 :
The rate of chemical reaction is directly proportional to the equilibrium constant.<br/>In which of the following process reaction will be completed first?