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MCQOPTIONS
This section includes 1187 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 1101. |
The Zn acts as sacrificial or cathodic protection to prevent rusting of iron because: |
| A. | \[{{E}^{{}^\circ }}_{OP}\,\text{of }Zn<{{E}^{{}^\circ }}_{OP}\text{of}\,Fe\] |
| B. | \[{{E}^{{}^\circ }}_{OP}\,\text{of}\,Zn>{{E}^{{}^\circ }}_{OP}\,\text{of}\,Fe\] |
| C. | \[{{E}^{{}^\circ }}_{OP}\text{of}\,Zn={{E}^{{}^\circ }}_{OP}\,\text{of}\,Fe\] |
| D. | Zn is cheaper than iron |
| Answer» C. \[{{E}^{{}^\circ }}_{OP}\text{of}\,Zn={{E}^{{}^\circ }}_{OP}\,\text{of}\,Fe\] | |
| 1102. |
Consider the following four electrodes:\[P=C{{u}^{2+}}(0.0001M)/Cu(s)\]\[Q=C{{u}^{2+}}\left( 0.1\text{ }M)/Cu(s \right)\]\[R=C{{u}^{2+}}(0.01M/)Cu(s)\]\[S=C{{u}^{2+}}(0.001M/)Cu(s)\]If the standard reduction potential of \[C{{u}^{2+}}/Cu\] is +0.34 V, the reduction potentials in volts of the above electrodes follow the order. |
| A. | \[P>S>R>Q\] |
| B. | \[S>R>Q>P\] |
| C. | \[R>S>Q>P\] |
| D. | \[Q>R>S>P\] |
| Answer» E. | |
| 1103. |
At 298 K, the standard reduction potentials are 1.51 V for\[MnO_{4}^{-}|M{{n}^{2+}},1.36V\,\text{for }C{{l}_{2}}|C{{l}^{-}},\,\,1.07\] \[V\,for\,B{{r}_{2}}/B{{r}^{-}}\], and 0.54 V for \[{{I}_{2}}/{{I}^{-}}.\text{ }At\text{ }pH=3,\] permanganate is expected to oxidize: \[\left( \frac{RT}{F}=0.059V \right)\] |
| A. | \[C{{l}^{-}},B{{r}^{-}}\] and \[{{I}^{-}}\] |
| B. | \[B{{r}^{-}}\] and \[{{I}^{-}}\] |
| C. | \[C{{l}^{-}}\] and \[B{{r}^{-}}\] |
| D. | \[{{I}^{-}}\] only |
| Answer» C. \[C{{l}^{-}}\] and \[B{{r}^{-}}\] | |
| 1104. |
A concentration cell is a galvanic cell in which |
| A. | decrease in free energy in a spontaneous chemical process appears as electrical energy |
| B. | decrease in free energy in a spontaneous physical process appears as electrical energy |
| C. | decrease in free energy in a spontaneous physical or chemical process appears as electrical energy |
| D. | a non-spontaneous physical or chemical process produces electrical energy. |
| Answer» C. decrease in free energy in a spontaneous physical or chemical process appears as electrical energy | |
| 1105. |
Mark the false statement? |
| A. | A salt bridge is used to eliminate liquid junction potential |
| B. | The Gibbs free energy change, \[\Delta G\] is related with electromotive force E as \[\Delta G=-nFE\] |
| C. | Nernst equation for single electrode potential is \[E=E{}^\circ -\frac{RT}{nF}log{{a}_{{{M}^{n+}}}}\] |
| D. | The efficiency of a hydrogen-oxygen fuel cell is 23% |
| Answer» D. The efficiency of a hydrogen-oxygen fuel cell is 23% | |
| 1106. |
An unknown metal M displaces nickel from nickel (II) sulphate solution but does not displace manganese from manganese sulphate solution. Which order represents the correct order of reducing power? |
| A. | \[Mn>Ni>M\] |
| B. | \[Ni>Mn>M\] |
| C. | \[Mn>M>Ni\] |
| D. | \[M>Ni>Mn\] |
| Answer» D. \[M>Ni>Mn\] | |
| 1107. |
If the \[E{{{}^\circ }_{cell}}\] for a given reaction has a negative value, then which of the following gives the correct relationships for the values of \[\Delta G{}^\circ \] and \[{{K}_{eq}}\] ? |
| A. | \[\Delta G{}^\circ >0;{{K}_{eq}}>1\] |
| B. | \[\Delta G{}^\circ <0;\,\,{{K}_{eq}}>1\] |
| C. | \[\Delta G{}^\circ <0;\,\,{{K}_{eq}}<1\] |
| D. | \[\Delta G{}^\circ >0;\,\,{{K}_{eq}}<1\] |
| Answer» E. | |
| 1108. |
Which colourless gas evolves, when \[N{{H}_{4}}Cl\] reacts with zinc in a dry cell battery |
| A. | \[N{{H}_{4}}\] |
| B. | \[{{N}_{2}}\] |
| C. | \[{{H}_{2}}\] |
| D. | \[C{{l}_{2}}\] |
| Answer» D. \[C{{l}_{2}}\] | |
| 1109. |
Electrode potential of the half cell \[Pt\left( s \right)|Hg\left( l \right)|\]\[H{{g}_{2}}C{{l}_{2}}(s)|C{{l}^{-}}(aq)\] can be increased by: |
| A. | Increasing \[\left[ C{{l}^{-}} \right]\] |
| B. | Decreasing \[\left[ C{{l}^{-}} \right]\] |
| C. | Increasing \[H{{g}_{2}}C{{l}_{2}}(s)\] |
| D. | Decreasing \[Hg\left( l \right)\] |
| Answer» C. Increasing \[H{{g}_{2}}C{{l}_{2}}(s)\] | |
| 1110. |
A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At wt. = 177). The oxidation state of the metal in the metal salt is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 1111. |
The limiting equivalent conductivity of \[NaCl,~KCl\] and \[KBr\] are 126.5, 150.0 and\[151.5\text{ }S\text{ }c{{m}^{2}}e{{q}^{-1}}\], respectively. The limiting equivalent ionic conductivity for \[B{{r}^{-}}\] is\[78\,Sc{{m}^{2}}e{{q}^{-1}}\]. The limiting equivalent ionic conductivity for \[N{{a}^{+}}\] ions would be: |
| A. | 128 |
| B. | 125 |
| C. | 49 |
| D. | 50 |
| Answer» E. | |
| 1112. |
Consider the following reactions (i) \[C{{d}^{2+}}\left( aq \right)+2{{e}^{-}}\xrightarrow{{}}Cd\left( s \right),E{}^\circ =-0.40V\] (ii) \[A{{g}^{+}}(aq)+{{e}^{-}}\xrightarrow{{}}Ag(s),E{}^\circ =0.80V\] For the galvanic cell involving the above reactions. Which of the following is not correct? |
| A. | Molar concentration of the cation in the cathodic compartment changes faster than that of the cation in the anodic compartment. |
| B. | \[{{E}_{cell}}\] increase when \[C{{d}^{2+}}\] solution is diluted. |
| C. | Twice as many electrons pass through the cadmium electrode as through silver electrode. |
| D. | \[{{E}_{cell}}\] decreases when \[A{{g}^{+}}\] solution is diluted. |
| Answer» D. \[{{E}_{cell}}\] decreases when \[A{{g}^{+}}\] solution is diluted. | |
| 1113. |
A current of 10.0 A flows for 2.00 h through an electrolytic cell containing a molten salt of metal X. This results in the decomposition of \[0.250\text{ }mol\] of metal X at the cathode. The oxidation state of X in the molten salt is: \[\left( F=96,500C \right)\] |
| A. | \[{{1}^{+}}\] |
| B. | \[{{2}^{+}}\] |
| C. | \[{{3}^{+}}\] |
| D. | \[{{4}^{+}}\] |
| Answer» D. \[{{4}^{+}}\] | |
| 1114. |
Assertion: A small amount of acid or alkali is added before electrolysis of water. Reason: Pure water is weak electrolyte. Read the assertion and reason carefully to mark the correct option out of the options given below: |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 1115. |
Assertion: Zn metal is formed when a Cu plate in dipped in \[ZnS{{O}_{4}}\] solution. Reason: Cu being placed above Zn in electrochemical series. Read the assertion and reason carefully to mark the correct option out of the options given below: |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| Answer» E. | |
| 1116. |
Assertion: Emf and potential difference are same for cell. Reason: Both gives the difference in electrode potential under any condition. Read the assertion and reason carefully to mark the correct option out of the options given below: |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion.\ |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| Answer» E. | |
| 1117. |
Assertion: Salts like \[KCl,\,KN{{O}_{3}}\] i.e., inert electrolytes are used in salt bridge. Reason: An inert electrolyte can easily be filled in the U-tube. Read the assertion and reason carefully to mark the correct option out of the options given below: |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| Answer» D. If the assertion and reason both are false. | |
| 1118. |
Assertion: Galvanic cells containing hydrogen, methane, methanol etc. as fuels are called fuel cells. Reason: They are designed to convert the energy of combustion of fuels directly into electrical energy. Read the assertion and reason carefully to mark the correct option out of the options given below: |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 1119. |
Assertion: Weston is a standard cell. Reason: Its e.m.f. does not change with temperature. Read the assertion and reason carefully to mark the correct option out of the options given below: |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 1120. |
Which of the following statements is correct for the complex \[C{{a}_{2}}[Fe{{(CN)}_{5}}{{O}_{2}}]\] having \[{{t}_{2g}}^{6},{{e}_{g}}^{0}\]electronic configuration? |
| A. | \[{{d}^{2}}s{{p}^{3}}\] hybridised and diamagnetic |
| B. | \[s{{p}^{3}}{{d}^{2}}\] hybridised and paramagnetic |
| C. | \[s{{p}^{3}}{{d}^{2}}\] hybridised and diamagnetic |
| D. | \[{{d}^{2}}s{{p}^{3}}\] hybridised and paramagnetic |
| Answer» E. | |
| 1121. |
A compound contains 1.08 mole of Na, 0.539 mole of Cu and 2.16 mole of F. Its aqueous solution shows osmotic pressure which is three times that of urea having same molar concentration. The formula of the compound is: |
| A. | \[N{{a}_{4}}\left[ Cu{{F}_{6}} \right]\] |
| B. | \[Na\left[ Cu{{F}_{4}} \right]\] |
| C. | \[N{{a}_{2}}\left[ Cu{{F}_{4}} \right]\] |
| D. | \[N{{a}_{2}}[Cu{{F}_{3}}]\] |
| Answer» D. \[N{{a}_{2}}[Cu{{F}_{3}}]\] | |
| 1122. |
Select the complex that can be reduced most easily. |
| A. | \[Ni{{\left( CO \right)}_{4}}\] |
| B. | \[Cr{{\left( CO \right)}_{6}}\] |
| C. | \[V{{\left( CO \right)}_{6}}\] |
| D. | \[Fe{{(CO)}_{5}}\] |
| Answer» D. \[Fe{{(CO)}_{5}}\] | |
| 1123. |
The terahedral complex [M[A][B](X)(Y)], where A,B,X and Y are different ligands and M is a metal ion is |
| A. | optically inactive |
| B. | rotate plane polarized light |
| C. | incomplete information |
| D. | can't be said |
| Answer» C. incomplete information | |
| 1124. |
For \[[C{{o}_{2}}{{(CO)}_{8}}],\] what is the total number of metal - carbon bonds and number of metal-metal bonds. |
| A. | 10, 1 |
| B. | 8, 2 |
| C. | 8, 1 |
| D. | 10, 0 |
| Answer» B. 8, 2 | |
| 1125. |
The d-electron configurations of \[C{{r}^{2+}},M{{n}^{2+}},F{{e}^{2+}}\] and \[C{{o}^{2+}}\] are \[{{d}^{4}},{{d}^{5}},{{d}^{6}}\] and \[{{d}^{7}}\] respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. Cr = 24, Mn = 25, Fe= 26, Co = 27). |
| A. | \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| B. | \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| C. | \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| D. | \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| Answer» B. \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\] | |
| 1126. |
50 mL of 0.2 M solution of a compound with empirical formula \[CoC{{l}_{3}}.4N{{H}_{3}}\] on treatment with excess of \[AgN{{O}_{3}}(aq)\] yields 1.435g of\[AgCl\] Ammonia is not removed by treatment with concentrated \[{{H}_{2}}S{{O}_{4}}\]. The formula of the compound is: |
| A. | \[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}} \right]C{{l}_{3}}\] |
| B. | \[\left[ Co\left( N{{H}_{3}} \right)4C{{l}_{2}} \right]Cl\] |
| C. | \[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}} \right]C{{l}_{3}}\] |
| D. | \[\left[ CoC{{l}_{3}}\left( N{{H}_{3}} \right) \right]{{\left( N{{H}_{3}} \right)}_{3}}\] |
| Answer» C. \[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}} \right]C{{l}_{3}}\] | |
| 1127. |
In which of the following octahedral complex species the magnitude of \[{{\Delta }_{\operatorname{o}}}\] will be maximum? |
| A. | \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| B. | \[{{\left[ Co{{\left( CN \right)}_{6}} \right]}^{3-}}\] |
| C. | \[{{\left[ Co{{\left( {{C}_{2}}{{O}_{4}} \right)}_{3}} \right]}^{3-}}\] |
| D. | \[{{[Co\,{{(N{{H}_{3}})}_{6}}]}^{3+}}\] |
| Answer» C. \[{{\left[ Co{{\left( {{C}_{2}}{{O}_{4}} \right)}_{3}} \right]}^{3-}}\] | |
| 1128. |
Which of the following will give maximum number of isomers? |
| A. | \[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]\] |
| B. | \[{{[Ni(en){{(N{{H}_{3}})}_{4}}]}^{2+}}\] |
| C. | \[[Ni{{({{C}_{2}}{{O}_{4}})}_{4}}{{(en)}_{2}}]\] |
| D. | \[{{[Cr{{(SCN)}_{2}}{{(N{{H}_{3}})}_{4}}]}^{2+}}\] |
| Answer» E. | |
| 1129. |
Incorrect match is: |
| A. | \[\left[ Rh{{\left( PP{{h}_{3}} \right)}_{3}}Cl \right]:\] Wilkinson's catalyst |
| B. | \[{{\left[ Co{{\left( CO \right)}_{4}} \right]}^{-}}:\]Bond order of \[Co-CO\] bond is greater than one |
| C. | \[[Zn{{\left( N{{H}_{3}} \right)}_{4}}][Be{{\left( OH \right)}_{4}}]\]: colorless complex |
| D. | \[{{[Cr{{\left( CN \right)}_{6}}]}^{3-}}\]: Inner orbital low spin complex |
| Answer» E. | |
| 1130. |
Which of the characteristic is not common between \[{{[Cu{{(en)}_{2}}]}^{2+}}\] and \[[Ni{{(dmg)}_{2}}]\]? |
| A. | Geometry of comp lexes |
| B. | Hybridization of central metal cation |
| C. | Magnetic behaviour |
| D. | Number of stereoisomers |
| Answer» D. Number of stereoisomers | |
| 1131. |
Type of isomerism which exists between \[[Pd{{({{C}_{6}}{{H}_{5}})}_{2}}{{(SCN)}_{2}}]\] and \[[Pd{{({{C}_{6}}{{H}_{5}})}_{2}}{{(NCS)}_{2}}]\] is: |
| A. | Linkage isomerism |
| B. | Coordination isomerism |
| C. | lonisation isomerism |
| D. | Solvate isomerism |
| Answer» B. Coordination isomerism | |
| 1132. |
For complex ion/compound formation reactions(I) \[C{{o}^{3+}}(aq)+EDT{{A}^{4-}}\xrightarrow{{}}P\](II) \[N{{i}^{2+}}\left( aq \right)+dmg\left( excess \right)\xrightarrow{N{{H}_{4}}OH}Q\](III) \[Z{{n}^{2+}}\left( aq \right)+gly\left( excess \right)\xrightarrow{{}}R\](IV) \[P{{t}^{4+}}(aq)+en\,(excess)\xrightarrow{{}}S\]which of the following complex ion/compound does not exhibit optical activity? |
| A. | P |
| B. | Q |
| C. | R |
| D. | S |
| Answer» C. R | |
| 1133. |
The complex given is (i) non-superimposable on its mirror images (ii) optically active (iii) rotate plane polarised light (iv) planar |
| A. | (i) and (ii) |
| B. | (i) and (iv) |
| C. | (i),(ii) and (iii) |
| D. | (ii) only |
| Answer» D. (ii) only | |
| 1134. |
Which of the following is a hypnotic drug? |
| A. | luminal |
| B. | salol |
| C. | catechol |
| D. | chemisol |
| Answer» B. salol | |
| 1135. |
Artificial sweetner which is stable under cold conditions only is: |
| A. | Saccharine |
| B. | Sucralose |
| C. | Aspartame |
| D. | Alitame |
| Answer» D. Alitame | |
| 1136. |
Which of the following represents soap? |
| A. | \[{{C}_{17}}{{H}_{35}}COOK\] |
| B. | \[{{C}_{17}}{{H}_{35}}COOH\] |
| C. | \[{{C}_{15}}{{H}_{31}}COOH\] |
| D. | \[{{\left( {{C}_{17}}{{H}_{35}}COO \right)}_{2}}Ca\] |
| Answer» B. \[{{C}_{17}}{{H}_{35}}COOH\] | |
| 1137. |
Substance used for the preservation of coloured fruit juices is |
| A. | benzene |
| B. | benzoic acid |
| C. | phenol |
| D. | sodium meta bisulphite |
| Answer» C. phenol | |
| 1138. |
Which of the following is a bactericidal antibiotic? |
| A. | Ofloxacin |
| B. | Tetracycline |
| C. | Chloramphemcol |
| D. | Erythromycin |
| Answer» B. Tetracycline | |
| 1139. |
Sulpha drugs are used for |
| A. | precipitating bacteria |
| B. | removing bacteria |
| C. | decreasing the size of bacteria |
| D. | stopping the growth of bacteria |
| Answer» E. | |
| 1140. |
Which one of the following is employed as a tranquilizer? |
| A. | Naproxen |
| B. | Tetracycline |
| C. | Chlorpheninamine |
| D. | Equanil |
| Answer» E. | |
| 1141. |
\[{{H}_{1}}\]- Receptor antagonists is a term associated with: |
| A. | Antiseptics |
| B. | Antihistamins |
| C. | Antacids |
| D. | Analgesics |
| Answer» C. Antacids | |
| 1142. |
A reaction having equal energies of activation for forward and reverse reaction has: |
| A. | \[\Delta G=0\] |
| B. | \[\Delta H=0\] |
| C. | \[\Delta H=\Delta G=\Delta S=0\] |
| D. | \[\Delta S=0\] |
| Answer» C. \[\Delta H=\Delta G=\Delta S=0\] | |
| 1143. |
A following mechanism has been proposed for a reaction \[2A+B\to D+E\] \[A+B\to C+D\left( slow \right)\] \[A+C\to E\left( fast \right)\] The rate law expression for the reaction is: |
| A. | \[r=k{{\left[ A \right]}^{2}}\left[ B \right]\] |
| B. | \[r=k\left[ A \right]\left[ B \right]\] |
| C. | \[r=k{{\left[ A \right]}^{2}}\] |
| D. | \[r=k\left[ A \right]\left[ C \right]\] |
| Answer» C. \[r=k{{\left[ A \right]}^{2}}\] | |
| 1144. |
The half life period for catalytic decomposition of \[A{{B}_{3}}\] at 50 mm Hg is 4 hrs and at 100 mm Hg it is 2 hrs. The order of reaction is |
| A. | 1 |
| B. | 3 |
| C. | 2 |
| D. | 0 |
| Answer» D. 0 | |
| 1145. |
In a reaction at \[27{}^\circ C,{{10}^{-3}}\]% reactant molecules manage to cross over the barrier of transition state. The energy of these molecules in excess of the average value will be \[(R=2cal\text{ }{{K}^{-1}}\text{ }mo{{l}^{-1}})\]: |
| A. | \[6.91\text{ kc}al\text{ }mo{{l}^{-1}}\] |
| B. | \[3.00\text{ kc}al\text{ }mo{{l}^{-1}}\] |
| C. | \[4.15\,kcal\,mo{{l}^{-1}}\] |
| D. | \[5.10kcal\,mo{{l}^{-1}}\] |
| Answer» B. \[3.00\text{ kc}al\text{ }mo{{l}^{-1}}\] | |
| 1146. |
The reaction of \[{{A}_{2}}\] and \[{{B}_{2}}\] follows the equation \[{{A}_{2}}(g)+{{B}_{2}}(g)\to 2AB(g)\] The following data were observed\[{{[{{A}_{2}}]}_{0}}\]\[{{[{{B}_{2}}]}_{0}}\]Initial rate of appearance of \[AB(g)\,(in\,M{{s}^{-1}})\]0.100.10\[2.5\times {{10}^{-4}}\]0.200.10\[5\times {{10}^{-4}}\]0.200.20\[10\times {{10}^{-4}}\]The value of rate constant for the above reaction is: |
| A. | \[2.5\times {{10}^{-4}}\] |
| B. | \[2.5\times {{10}^{-2}}\] |
| C. | \[1.25\times {{10}^{-2}}\] |
| D. | None of these |
| Answer» D. None of these | |
| 1147. |
The rate of a reaction increases four-fold when the concentration of reactant is increased 16 times. If the rate of reaction is \[4\times {{10}^{-6}}mol\text{ }{{L}^{-1}}\text{ }{{s}^{-1}}\]when the concentration of the reactant is\[4\times {{10}^{-4}}mol\text{ }{{L}^{-1}}\]. The rate constant of the reaction will be |
| A. | \[2\times {{10}^{-4}}mo{{l}^{1/2}}{{L}^{-1/2}}{{s}^{-1}}\] |
| B. | \[1\times {{10}^{-2}}{{s}^{-1}}\] |
| C. | \[2\times {{10}^{-4}}mo{{l}^{-1/2}}{{L}^{1/2}}{{s}^{-1}}\] |
| D. | \[25\text{ }mo{{l}^{-1}}L\text{ }mi{{n}^{-1}}\] |
| Answer» B. \[1\times {{10}^{-2}}{{s}^{-1}}\] | |
| 1148. |
Rate of a reaction can be expressed by Arrhenius equation as: \[k=A{{e}^{-{{E}_{a}}}}^{/RT}\] In this equation, \[{{E}_{a}}\] represents |
| A. | the total energy of the reacting molecules at a temperature, T |
| B. | the fraction of molecules with energy greater than the activation energy of the reaction |
| C. | the energy below which all the colliding molecules will react |
| D. | the energy below which colliding molecules will not react |
| Answer» E. | |
| 1149. |
For the reaction, \[3A+2B\to C+D\], the differential rate law can be written as: |
| A. | \[\frac{1}{3}\frac{d[A]}{dt}=\frac{d[C]}{dt}=k{{[A]}^{n}}{{[B]}^{m}}\] |
| B. | \[-\frac{d[A]}{dt}=\frac{d[C]}{dt}=k{{[A]}^{n}}{{[B]}^{m}}\] |
| C. | \[+\frac{1}{3}\frac{d[A]}{dt}=-\frac{d[C]}{dt}=k{{[A]}^{n}}{{[B]}^{m}}\] |
| D. | \[-\frac{1}{3}\frac{d[A]}{dt}=\frac{d[C]}{dt}=k{{[A]}^{n}}{{[B]}^{m}}\] |
| Answer» E. | |
| 1150. |
A reaction which is of first order w.r.t. reactant A, has a rate constant 6 \[{{\min }^{-1}}\]. If we start with \[\left[ A \right]=0.5\text{ }mol\text{ }{{L}^{-1}}\], when would [A] reach the value of \[0.05\text{ }mol\,{{L}^{-1}}\] |
| A. | 0.384 min |
| B. | 0.15 min |
| C. | 3 min |
| D. | 3.84 min |
| Answer» B. 0.15 min | |