Question 1 :
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 2 :
<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 3 :
<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 7 :
KCl can be used in salt bridge as electrolyte in which of the following cells?

Question 9 :
<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 10 :
<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 11 :
<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">&#160;+ 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 13 :
<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 14 :
<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 15 :
<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 16 :
Assertion:&#160;Dry cell is a primary&#160;cell and lead storage cell is a&#160;secondary&#160;cell.<br/>Reason: A primary cell can only be used once while secondary cells are rechargeable.<br/>

Question 17 :
<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 20 :
In a cell, the following reaction takes place: $Fe + CuSO_{4} \rightarrow FeSO_{4} + Cu$. The cell can be represented as:

Question 21 :
Assertion: The Daniell cell becomes dead after some time. Reason: Oxidation potential of zinc anode decreases and that of copper increases.

Question 22 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">The chemical used in salt bridge in a galvanic cell is:</p>

Question 24 :
The reaction<br/>$1/2H_2(g)\, +\, AgCl(s)\, \rightarrow\, H^{\bigoplus}(aq)\, +\, Cl^{\circleddash}(aq)\, +\, Ag(s)$ occurs in the galvanic cell:

Question 25 :
Two&#160;platinum electrodes were immersed in a solution of $CuSO_4$ and electric&#160;current was passed through the solution. After some time, it was found that&#160;colour of $CuSO_4$ disappeared with evolution of gas at the electrode. The&#160;colorless solution contains:<br/>

Question 28 :
The oxidation potential of a hydrogen electrode at $pH = 10$ and $P_{H_2}$ = 1 atm is:

Question 29 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Maintenance-free batteries, now in use, in place&#160;of common batteries, have :</p>

Question 30 :
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 31 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p>The life span of a Daniel cell may increased by:</p>

Question 32 :
<font color="#333333">State True or False.</font>In a galvanic cell, the half-cell with higher reduction potential acts as a reducing agent.&#160;

Question 33 :
Assertion: In the calomel half-cell, the reduction reaction to be considered is Hg$_2$Cl$_2$ (s) + 2e$^-$ $\rightarrow$ 2Hg (l) + 2Cl$^-$ (aq).<br/>Reason:&#160;The Saturated calomel electrode (SCE) is a reference electrode based on the reaction between elemental mercury and mercury(I) chloride.<br/>

Question 34 :
<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 35 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Some of the batteries have alkaline electrolytes-</p>&#10;<p class="wysiwyg-text-align-left">i) Nickel - cadmium ii) Mercury battery</p>&#10;<p class="wysiwyg-text-align-left">iii) Modified Leclanche cell</p>&#10;<p><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">Cell potential is independent of [OH$^{-}$<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">] in :</p>

Question 36 :
During the electrolysis of the aqueous solution of copper sulphate using&#160;Pt electrodes, the reaction taking place at anode electrode is:

Question 37 :
State True or False.<br/>The ratio of gases liberated at cathode and anode during electrolysis of CH$_3$COONa(aq) is 1 : 3.

Question 38 :
Electrolysis of a dilute solution of aqueous sodium chloride results in the cathode product:

Question 39 :
Assertion: For the Daniell cell, $Zn|Zn^{2+} | | Cu^{2+}|Cu$ with $E_{cell} = 1.1\ volt$, the application of opposite potential greater than $1.1\ V$ results into flow of electrons from cathode to anode. Reason: $Zn$ is deposited at anode and $Cu$ is dissolved at cathode.

Question 40 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">In a Daniel cell when $Cu$ and $Zn$ electrodes are connected current flows from:</p>

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 45 :
The correct expression for the rate of reaction of elementary reaction, $A + B \rightarrow C$ is :

Question 47 :
While plotting decrease in mass against time, a flat curve shows:

Question 48 :
The branch of chemistry which deals with the study of chemical reaction rate is known as :

Question 50 :
What is the rate of the reaction for $2A \rightarrow B$ ?<br>

Question 51 :
The rate for the reaction between ionic compounds cannot be determined because they are generally:

Question 52 :
The rate of reaction for the reaction between ionic compounds cannot be determined because they are generally:

Question 54 :
Why do most chemical reaction rates increase rapidly as the temperature rises

Question 57 :
If the rate of reaction increases by 27 times, when temperature is increased by 30 K, then temperature coefficient of the reaction is:

Question 58 :
The unit of rate and rate constant are same for a:

Question 59 :
For the reaction $2A+B\rightarrow 3C+D$ which of the following does not express the reaction rate?<br/>

Question 60 :
A reaction has both $\Delta H$ and $\Delta S$ negative. The rate of reaction:

Question 63 :
Energy produced in a chemical reaction is a specific type of :<br/>

Question 65 :
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 67 :
In___________, a reaction product is itself a catalyst for that reaction leading to positive feedback.<br/>

Question 68 :
___________ is the unit for the rate of a chemical reaction.

Question 70 :
Which of the following theory is not related to the chemical kinetics?

Question 71 :
In a reaction, a substance undergoes decomposition which is catalyzed in the presence of finely divided nickel. If there are enough sites on the surface of catalysts so that 20 molecules of substance react per second, the rate of reaction for a 1.0M solution is:

Question 72 :
Thermal decomposition of $N_2O_5$ occurs as per the equation below<br/>$2N_2O_5\rightarrow 4NO_2+O_2$<br/>The correct statement is:&#160;

Question 73 :
The rate of chemical reaction is directly proportional to the equilibrium constant.<br/>In which of the following process reaction will be completed first?

Question 75 :
What would be the effect of increasing solvent polarity on the rate of each of the following reactions? (Nu = neutral nucleophile)(A) $Nu+R-L\longrightarrow \overset { \oplus&#160; }{ N } u-R+{ L }^{ - }$<br/>

Question 76 :
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 77 :
When a piece of zinc metal is added to a solution of hydrochloric acid, a reaction occurs. The products are aqueous zinc chloride and hydrogen gas.<br>Which of the following conditions would result in the fastest rate of reaction with $1.00 g$ of zinc?

Question 78 :
Which of the following statements is correct (for zero order reaction)?

Question 79 :
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 80 :
Which of the following choices could not be able to explain the increase in the rate of a chemical reaction?

Question 82 :
In a slow reaction, rate of reaction generally _________ with time.<br/>

Question 83 :
Reaction; $A+B\longrightarrow C+D$, follows rate law; $rate=k{ \left[ A \right]&#160; }^{ 2 }{ \left[ B \right]&#160; }^{ 2 }$. Starting with initial concentration of $1M$ of&#160;$A$ and $B$ each, what is the time taken for concentration of $A$ to become $0.25M$?<br/>Given: $k=2.303\times { 10 }^{ -2 }{ sec }^{ -1 }$&#160;

Question 84 :
The rate of the reaction:<br/>$CH_{3}COOC_{2}H_{5} + NaOH \rightarrow CH_{3}COONa + C_{2}H_{5}OH$<br/>is given by the equation,<br/>$rate = k[CH_{3}COOC_{2}H_{5}][NaOH]$<br/>If concentration is expressed in $mol/ L$, the units of $k$ are:

Question 85 :
The concentration of a reactant changes from $0.06M$ to $0.04M$ in $20secs$. What is the average rate of the reaction?

Question 86 :
In a fermentation tank, molasses solution is mixed with yeast enzymes. After three days alcohol was observed. The speed of the reaction in this case is :

Question 87 :
For the reaction: $2A + B \rightarrow 3C + D$. Which of the following does not express theiraction rate?<br>

Question 88 :
Under certain conditions, the average rate of appearance of oxygen gas in the reaction: $2O_3(g) \longrightarrow 3O_2(g)$ is 6.0 torr sec$^{-1}$. What is average rate expressed in units of torr sec$^{-1}$ for the disappearance of $O_3$?<br/>

Question 89 :
Rate of formation of $SO_3$ in the following reaction $2SO_2+O_2\rightarrow 2SO_3$ is $100g$ $min^{-1}$.&#160;<br/>Then the rate of disappearance of $O_2$ is:

Question 90 :
Consider the chemical reaction:<br/>$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$<br/>The rate of this reaction can be expressed; in terms of time and of concentration of $N_2(g), H_2(g)$ $NH_3(g)$. Identify the correct relationship amongst the rate expressions.<br/>

Question 91 :
$2KClO_3 \to 2KCl$ <br> $+$ <br> $3O_2$. What will be the instantaneous rate of the reaction in terms of the reactant?

Question 92 :
Rate of formation of ${SO}_{3}$ in the following reaction $2{ SO }_{ 2 }+{ O }_{ 2 }\longrightarrow 2{ SO }_{ 3 }$ is $100g\quad { min }^{ -1 }$. Hence disappearance of ${O}_{2}$ is:

Question 93 :
If $r=-\cfrac { 3 }{ 2 } \cfrac { \Delta \left[ A \right] }{ \Delta t } =-5\cfrac { \Delta \left[ B \right] }{ \Delta t } =+\cfrac { 7 }{ 3 } \cfrac { \left[ \Delta C \right] }{ \Delta t } $, which of the following is the corresponding stoichiometric equation?

Question 94 :
Which of the following expression can be used to describe the instantaneous rate of the reaction?<br/>$2A + B$ $\rightarrow\, A_2B$

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 :
Hydrogentaion of vegetable ghee at $25^oC$ reduces the pressure of $H_2$ from 2 atm to 1.2 atm in 50 minute. The rate of reaction in terms of change of&#160; molarity per second is:<br/>

Question 98 :
$NO_2$ required for a reaction is produced by the decomposition of $N_2O_5$ in $CCl_4$ as per the equation<br>$2N_2O_5(g) \rightarrow 4NO_2(g)+O_2(g)$.<br>The initial concentration of $N_2O_5$ is $3.00\, mol\, L^{-1}$ and it is $2.75\, mol\, L^{-1}$ after $30$ minute. The rate of formation of $NO_2$ is :

Question 99 :
Chemical substances slowing the rate of chemical reaction is called as :