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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
STATEMENT-1 : `CuO` is called balck oxide of copper . and STATEMENT-2: CuO is diamagneticA. Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1B. Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True , Statement-2 is FalseD. Statement-1 is False , Statement-2 is True |
| Answer» Correct Answer - C | |
| 102. |
Which of the following oxide is basic ?A. CrOB. `Cr_(2)O_(3)`C. `CrO_(3)`D. `Cr_(2)O_(4)` |
| Answer» Correct Answer - A | |
| 103. |
The metal ion which does not form coloured compound isA. ChromiumB. ZineC. ManganeseD. Iron |
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Answer» Correct Answer - B Zince does not have any unparied electron pair so it forms only colour compound. |
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| 104. |
Which metal does not give the following reaction `M +` water or steam `rarr` oxide `+ H darr`A. MagnesiumB. IronC. SodiumD. Mercury |
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Answer» Correct Answer - D Mercury does not give `H_(2)` on reacting with water because its ionisation energy is so much high. |
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| 105. |
The electronic configuration `1 s^(2), 2 s^(2), p^(6), 3 s^(2), p^(6), d^(6)` corresponds toA. `Fe^(2+)`B. `Mn^(2+)`C. `Co^(2+)`D. `Ge` |
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Answer» Correct Answer - A `Fe^(2+) - 1 s^(2) 2 s^(2) p^(6) 3 s^(2) p^(2) d^(6)` |
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| 106. |
The trend of basicity of lanthanoid hydroxidesA. increases across the lanthanoid seriesB. decreases across the lanthanoid seriesC. first increases and then decreasesD. first decreases and then increases. |
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Answer» Correct Answer - B Basicity of lanthanoid hydroxides decreases across the series due to decrease in ionic radii across the series. |
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| 107. |
Set of continuos atomic number of elements are present in the same group as well as same period.A. 89,90,91,92B. 56,57,58,59C. 68,69,70,71D. `101,102,103,104` |
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Answer» Correct Answer - C Er (68), Tm (69), Ub(70)and Lu (71) element are present in th same group as well as same period. |
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| 108. |
Misch metal isA. am alloy o flanthanide and copperB. an alloy of lanthanide and nickelC. an alloy of lanthanide iron carbonD. an alloy of calcium and copper |
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Answer» Correct Answer - C Misch Metal: Lanthanoid matal = 95% (about `40% La, 50 Ce` and rest other lanthanoids) Iron `= 5%` `S, C, Ca` and `A1`= traces. |
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| 109. |
The element that is not present in misch metal isA. LaB. IronC. NaD. Ce |
| Answer» Correct Answer - C | |
| 110. |
Assertion : `CuSO_(4).5H_(2)O` on heating to `250^(@)C` losses all the five `H_(2) O` molecules and becomes anhydrous. Reason : All five `H_(2) O` molecules are coordinated to the central `Cu^(2+)` ion.A. If both assetion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are ture but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - C Assertion: `CuSO_(4). 5H_(2) O overset(250^(@)C)rarr CuSO_(4)` (white) `+ 5H_(2)O`. Anhydrous copper sulphate becomes white because there is no d-d transition of electron in absence of ligands according to crystal field theory. Reason: Four water molecules are coordinated to `Cu^(2+)` and fifth one is hydrogen bonded to two water molecules and anion, `SO_(4)^(2-)` |
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| 111. |
Which of the following statements is corrected about equivalent weight of `KMnO_(4)`?A. It is one third of its molecular weightin alkalineB. It is one fifth of its molecular weight in alkaline mediumC. It is equal to its molecular weight in acidic mediumD. It is one third of its molecular weight in acidic medium |
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Answer» Correct Answer - A It is one-third of its molecular weight in alkaline medium because it gives 3 nascent oxygen in alkaline medium. `2KMnO_(4) + H_(2) O overset(+3 e^(-))rarr 2KOH + 2MnO_(2) + 3 [O]` `:.` Equivalent weight `= (M)/(3)` |
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| 112. |
STATEMENT-1 : `MnO_(4)^(-)` is tetrahedral in shape . and STATEMENT-2: `KMnO_(4)` is purple in colour .A. Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1B. Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True , Statement-2 is FalseD. Statement-1 is False , Statement-2 is True |
| Answer» Correct Answer - B | |
| 113. |
Transition metals combine with halogens at high temperature to form compounds called halides. On account of high activation energy , the reactions require high temperature to start, but once the the reaction is started , the heat of reaction is sufficient to maintain the continuity . Metals in higher oxidation state form flourides as it is the most electronegative element . Flourides are ionic in nature . The chlorides , bromides and iodides have ionic as well as covalent character . Halides of metals is higher oxidation states are relatively unstable and hydrolysed very easily . Aqueous solution of which compound will have `pH lt 7` ?A. `TiCl_(4)`B. `FeCl_(3)`C. `CuSO_(4)`D. All of these |
| Answer» Correct Answer - D | |
| 114. |
STATEMENT-1 : Oxidation number of Cr in `K_(3) CrO_(8)` is +5 and STATEMENT-2: It contains tetraperoxo species , i.e., `[Cr(O_(2))_(4)]^(3-)`A. Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1B. Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True , Statement-2 is FalseD. Statement-1 is False , Statement-2 is True |
| Answer» Correct Answer - A | |
| 115. |
Which in not ture for transition elements?A. They do not form coordinate compoundsB. They show variable valencyC. They form coloured ionsD. They are all metals |
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Answer» Correct Answer - A Transition elements form co-ordinate compound because of (i) High nuclear charge (ii) Small size (iii) Vacant d-orbital |
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| 116. |
Which of the following processes does not involve oxidation of iron ?A. Liberation of `H_(2)` form steam by iron at high temperatureB. Rusting of iron sheetsC. Decolourization of blue `CuSO_(4)` solution by ironD. Formation of `Fe(CO)_(5)` form Fe |
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Answer» Correct Answer - D In both Fe and `Fe(CO)_(5)`, the oxidation state of iron is zero. `3Fe + underset("steam")(4H_(2)O) rarr Fe_(3)O_(4) + 4H_(2)` `Fe overset ("rusting") rarr underset((+3))(Fe_(2))O_(3) . xH_(2)O` `CuSO_(4) (aq) + underset((0))(Fe)(s) rarr underset((+2))(Fe)SO_(4) (aq) + Cu (s)` |
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| 117. |
Variable valency is shown byA. Typical elementsB. Transition elementsC. Normal elementsD. None of these |
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Answer» Correct Answer - B Transition metals show varible valency |
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| 118. |
Which one of the following shows highest magnetic moments?A. `V^(3+)`B. `Cr^(3+)`C. `Fe^(3+)`D. `Co^(3+)` |
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Answer» Correct Answer - C (a) Valene shell electron configuration of `V^(3 +)` is `[Ar]^(18) 3 d^(2)`, so `n = 2` (b) Valene shell electron configuration of `Cr^(3 +)` is `[Ar]^(18) 3 d^(3)`, so `n = 3` (c ) Valene shell electron configuration of `Fe^(3 +)` is `[Ar]^(18) 3 d^(5)`, so `n = 5` (d) Valene shell electron configuration of `Co^(3 +)` is `[Ar]^(18) 3 d^(6)`, so `n = 4` |
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| 119. |
Which of the following oxides are basic ?A. `Mn_2O_7 and V_2O_3`B. `V_2O_3 and CrO`C. `CrO and Cr_2O_3`D. `V_2O_5 and V_2O_3` |
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Answer» Correct Answer - B In case of transition metal oxides, the oxides with metals in lower oxidation states are basic in nature. ltbRgt O.S. of Mn in `Mn_2O_7=+7, V" in "V_2O_3= +3, V " in " V_2O_5 = +5`, Cr in CrO and `Cr_2O_3` transition metal ion is in lower oxidition state but `Cr_2O_3` is amphoteric in nature. Hence `V_2O_3` and CrO are basic in nature. |
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| 120. |
Which of the following oxides is basic?A. `Mn_(2)O_(3)`B. `MnO`C. `MnO_(2)`D. `Mn_(2)O_(7)` |
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Answer» Correct Answer - B The least is the oxidation number, the more basic is the oxide |
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| 121. |
Tempered steel isA. Soft and pliableB. Hare and brittleC. Very solftD. Neither so hard nor so brittle |
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Answer» Correct Answer - D Tempering: If the quenched or hardend steel is reheated toa temperature between `503 K` and `573 K` and then allowed to cool slowly, the process is caled tempering. |
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| 122. |
In this diagram , the most stable oxidation is A. `Mn^(0)`B. `Mn^(+2)`C. `MnO_(4)^(-2)`D. `Mn^(+3)` |
| Answer» Correct Answer - B | |
| 123. |
Which of the following elements is sometimes used to protect iron ?A. CuB. PtC. NiD. Pd |
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Answer» Correct Answer - C Nickel is a silvery white metal that is quite unreactive. In fact, Ni plating is sometimes used to protect iron. Group 10 consist of elements-nickel, palladioum, platinum and darmstadtium. In the bulk state none of thes is eractive and indeed are resistant to atmospheric corrosion at normal temperatures. Ni and Pd react on hating with centain nonmetals such as halogens. However, the reactivity falls from Ni through Pd tyo Pt. The oxidation state of `+2` is important for Ni and Pd but four Pt both the `+2` and `+4` oxidation states are equally important. Nickel is well known as an alloying metal, e.g., nichrome (`60%` Ni, `40%` Cr) and german silver `(Cu 25 - `30%`, Zn 25 - `30%` and Ni 40 - `50%`). Most extensive uses of Pd and Pt are as catalysts. |
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| 124. |
With F highest stable oxidation state of Mn isA. `+6`B. `+4`C. `+7`D. `+3` |
| Answer» Correct Answer - B | |
| 125. |
Which of the following statement is not true?A. Transtiton elements form the complex compoundsB. Coloured compounds of trasition element are paramagneticC. Colourless compounds of transition elements are diamagneticD. Colourless compounds of transition elements are paramagnetic |
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Answer» Correct Answer - D Colourless compounds are tose which have no uuparied electrons and paramagnetic substance to have uparied electrons. Therefore paremagnetic substance possess colour. |
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| 126. |
Assertion : `Fe_(3)O_(4)` is paramagnetic at room temperature and becomes ferromagnetic at `850 K` Reason : The randomization of spin takes place with temperature.A. If both the assertion and reason are ture but the reason is a true explanation of the assertion.B. If both the assertion and reason are true but the reason is not the correct explanation of the assertionC. If the assertion is true but reason is falseD. If assertion is false but reason is true. |
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Answer» Correct Answer - D `Fe_(3) O_(4)` is ferromagnetic at room temperature and becomes paramagnetic at `850K` due to randomization of spin wit temperature. |
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| 127. |
Assetion : `Ce^(3+)` is used as an oxidizing in volumetric analysis. Reason : The nubmer of uparied electrons in the following gaseous inon: `Mn^(3+), Cr^(3+), V^(3+)` and `Ti^(3+)` are 4,3,2 and 1 respctively.A. If both assetion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are ture but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - C Correct Reason: `Ce^(4+)` has the tendency to change to `Ce^(3+)` (as `+ 3` oxidation state is more stable). |
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| 128. |
Assertion: `Tt^(3+)` salts are coloured whereas `Ti^(4+)` salts are white. `Ti^(3+)` is less stable than `Ti^(4+)`A. If both assetion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are ture but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - B Correct explanation: `Ti (III)` salts have one upaied electron in d-subshell `(3d^(1))` whereas `Ti (IV)` salts no electron in the d-subshell `(3 d^(0))`. |
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| 129. |
Which of the following have maximum number of uparied electronsA. `Co^(3+)`B. `Fe^(2+)`C. `Co^(2+)`D. `Fe^(3+)` |
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Answer» Correct Answer - D `Co^(3 +) rarr [Ar] 3 d^(6) 4 s^(0)`, number of uparied electrons = 4 `Fe^(2 +) rarr [Ar] 3 d^(6) 4 s^(0)`, number of uparied electrons = 4 `Co^(2 +) rarr [Ar] 3 d^(7) 4 s^(0)`, number of uparied electrons = 3 `Fe^(3 +) rarr [Ar] 3 d^(6) 4 s^(0)`, number of uparied electrons = 5 |
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| 130. |
Which of the following does not react with `AgCl`?A. `NaNO_(3)`B. `Na_(2)CO_(3)`C. `Na_(2)S_(2)O_(3)`D. `NH_(4)OH` |
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Answer» Correct Answer - A `NaNO_(3)` is pruely inoic while `AgCl` is covalent. Other compound react with `AgCl` `2 AgCl + Na_(2) CO_(3) rarr 2 Ag + 2 NaCl + CO_(2) + (1)/(2) O_(2)` `AgCl + 2Na_(2) CO_(3) rarr Na_(2) [Ag(S_(2) O_(3))_(2)] + NaCl` `AgCl + 2 NH_(4) OH implies Ag(NH_(3))_(2)Dl] + 2H_(2) O` |
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| 131. |
Assertion : The value of enthaply of atomisation is maximum at about the middle of each series. Reason : There is one uparied electron per d-orbital and this results in stronger interatomic interaction.A. If both assetion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are ture but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - A Greater the numbe of valence electrons, stronger is the resultant bonding and higher the enthalpy of atomisation. |
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| 132. |
Bordeaux mixture is a mixture of copper sulphate andA. PyridineB. Rochelle saltC. LimeD. Sodium oxide |
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Answer» Correct Answer - C Cupric sulphate is used in large amounts as a germicide, fungicide and timer preservative. Its solution with slaked lime, known as Bordeaux mixture `[CuSO_(4) + Ca(OH)_(2)]`, is used as a spray for proventing blight in potatose and vines. Copper (II) sulphate is also used for copper plating (electroplating), electrotyping ans as the starting point in the preparation of many compounds of copper. Copper (II) sulphate form well-defined crystalline double salts with sulphates of strongly electropositive metals which generally correspond to the type `M_(2)` `^(I)SO_(4)` . `CuSO_(4)` . `6H_(2)O` and are greenish blue in color, e.g., `(NH_(4))_(2) SO_(4)` . `CuSO_(4)` . `6H_(2)O`. |
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| 133. |
Bell metal is an alloy ofA. `Cu +Ni`B. `Cu + Zn`C. `Cu + Sn`D. `Cu + Pb` |
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Answer» Correct Answer - C Bell metal, which is used for making bells, utensils etc. is an alloy of copper `(60 - 85%)` and tin. |
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| 134. |
Assertion : `FeSO_(4)` (aq) is not a primary standard. Reason : In aqueous medium, `Fe^(2++)` ions are not present.A. If both the assertion and reason are ture but the reason is a true explanation of the assertion.B. If both the assertion and reason are true but the reason is not the correct explanation of the assertionC. If the assertion is true but reason is falseD. If assertion is false but reason is true. |
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Answer» Correct Answer - C A standard solution of `FeSO_(4)` (aq) cannot be prepared by simple weighing as some of the `Fe^(2+)` are readily oxidised to `Fe^(3+)` ions. |
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| 135. |
`ZnO` when heated with `BaO` at `1100^(@)C` gives a compound. Identify the compoundA. `BaZnO_(2)`B. `BaO_(2) + Zn`C. `BaCdO_(2)`D. `Ba + ZnO_(2)` |
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Answer» Correct Answer - A `ZnO + BaO overset(1100^(@)C)rarr BaZnO_(2)` |
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| 136. |
Which of the following metals is obtained by leaching out process using a solution of `NaCN` and then precipitating the metal by addition of zinc dust?A. CopperB. SilverC. NickelD. Iron |
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Answer» Correct Answer - B `Ag_(2) S + 4NaCN rarr Na[Ag(CN)_(2)] + NA_(2) S` `2Na [Ag(CN)_(2)] + Zn rarr Na_(2) [Zn(CN)_(4)] + 2Ag` |
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| 137. |
STATEMENT-1 : Out of all actinoids , Th has highest melting point . and STATEMENT-2: Th has largest size among actinoids .A. Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1B. Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True , Statement-2 is FalseD. Statement-1 is False , Statement-2 is True |
| Answer» Correct Answer - B | |
| 138. |
Which of the following has the lowest enthalpy of atomisation ?A. VB. TiC. NiD. Zn |
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Answer» Correct Answer - D In general d-block elements exoibit higher enthalpies of atomisation on account of stronger boinding between atoms which arises due to participation of unpaired (n-1) d electrons in covalent bonding besides the participation of ns electrons in metallic bonding. In the 3d-series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomisation of zinic is the lowest, i.e., 126 kJ `mol^(-1)` because Zn has no unpaired (n-1) d electron available for additional convalent bonding. |
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| 139. |
In the f-block elements the last or differentiating electron enters the f-subshell of theA. third last shellB. second last shellC. fourth last shellD. outermost shell |
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Answer» Correct Answer - A In the f-block elements, electrons are added to the f-subshell of the antepenultimate shell, increasimng the number form 18 to 32. |
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| 140. |
Which of the following d-block metals has the highest boiling point ?A. ReB. TaC. WD. Hg |
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Answer» Correct Answer - A Among the d-block metals Re `(5650^(@))` has the highest boiling point following by W `(5500^(@)C)` and Ta `(5534^(@)C)`. Mercury `(357^(@)C)` has the lowest boiling point of all the metals. |
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| 141. |
Whichj of the following is the third most bioligically important d-block metal after iron and zinc ?A. AuB. AgC. CuD. Co |
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Answer» Correct Answer - C About 5 mg Cu are required in the daily human diet. A deficiency of this element renders the body unable to use Fe stored in the liver. There are numberous Cu proteins throughout the living world, the most intriguing being the hemocyanins. These moleculs are common oxygen carriers in the invertebrate world: Crabs, lobsters, octopi, scorpions and snail all have bright blue blood. At the same time, an excess of Cu is highly poisonouus, particularly to fish. This is why Cu coins should never be thrown into fish pools for 'good luck'. Humans usually excrete any excess, but a biochemical (genetic) defect can result in Cu accumulation in the liver, kidneys, and administering chelating agents, which complex the metal ion and allow it to be excreted harmlessly. The reactivity decreases down the group 11 and in its intertness gold resembles Pt metals. The best known oxidation states in aqueous solution are`+2` for Cu, `+1` for Ag and `+3` for Au. This agrees their ionization enthalpies, As has the lowest first ionization enthalpy, the sum of the first and second is lowest for Cu and the sum of the first, second and third is the lowest for Au. However, the elements are not well-related in their chemical behaviour, 'Horizonatal' similarities with their neighbours in the periodic table are in fact more noticeable than vertical ones. |
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| 142. |
Which of the following is a common white pigment ?A. `Cr_(2)O_(3)`B. `PbCrO_(4)`C. `TiO_(2)`D. `CrO_(3)` |
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Answer» Correct Answer - C Prior to the use of `TiO_(2)` in paints, the common white pigment was 'white lead' , `Pb_(3)` `(CO_(3))_(2)` `(OH)_(2)` . Apart form its toxicity, it discoloured in industrial city atmopspheres to give black lead sulphide (PbS). `TiO_(2)`, which is stable to discoloration in polluted air, has now replaced white lead completely. Not only is `TiO_(2)` of very low toxicity, it has the highest refractive index of any white or colourless inorganic substance (even higher than diamond). As a result of this high light-scattering ability, it covers and hides provious pains, it os also added to colored paints to make the colors paler and mask previous colors beter. Just as lead (II) chromate (Chrome yellow) is an important yellow pigment, so chromium (III) oxide is common green pigment. |
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| 143. |
Which one of the following statements is not correct ?A. Mercury (II) iodide dissolve in excuess of poptassium iodide solutiuonB. Tin (IV) chloride is made by dissolving tin solution in concentrated hydrochloric acidC. Zinc dissolves in sodium hydroxide solutionD. Carbon monoxide reduces iron (III) oxide to iron |
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Answer» Correct Answer - B Stannic chloride `(SnCI_(4))` is prepared by passing dry chlorine over fused tin in a retort. The vapors of stannic chloride are condensed in water cooled receiver: `Sn + 2CI_(2) rarr SnCI_(4)` Tin is not attacked by organic acids. This property is utilized fopr tinning cooking utensils made of copper or brass. It dissolves slowly in dil. HCI but readily in conc. HCI `Sn + 2HCI rarr SnCI_(2) + H_(2)` (1) The precipitated of mercuric iodidle dissolves in excess of potassium iodide forming a complex, `K_(2)HgI_(4)` : `HgI_(2) + 2KI rarr K_(2)HgI_(4)` (3) Zinc dissolved is hot caustic alkali solutions forming alkali zincate and evolving hydrogen: `Zn + 2NaOH rarr Na_(2)ZnO_(2) + H_(2)` Sodium zincatwe (4) `3F_(2)O_(3) + CO rarr 2F_(3)O_(4) + CO_(2)` `Fe_(3)O_(4) + 4CO rarr 3Fe + 4CO_(2)` |
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| 144. |
Which of the following elements is responsible for oxidation of water to `O_(2)` in biological processes ?A. FeB. CuC. MnD. Mo |
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Answer» Correct Answer - C Element Mn is responsible for oxidation of water to `O_(2)` in biological procrssrs. |
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| 145. |
The strongest base isA. `Ce(OH)_(3)`B. `Lu(OH)_(3)`C. `Yb(OH)_(3)`D. `Pm(OH)_(3)` |
| Answer» Correct Answer - A | |
| 146. |
The common oxidation states of Ti areA. `+2, +3, +4`B. `+2, +3`C. `+3, +4`D. `+3, -4` |
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Answer» Correct Answer - C Element Ti exhibits a variety of oxidation states `(-1, 0, +2, +3` and `+4)` but the most common and most stable oxidation states is `+4`. The oxidation state`+3` is reducing and `Ti^(3+)` ions are more strongly reducing than `Sn^(2+)`. The `+2` stateis veryunstable and is so strongly reducing that it reduces water. The lower oxidation states `(0, -1` and `-2)` which are found in dipyridyl complexes tend to disproportionate. |
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| 147. |
When `CuSO_(4)` is electrolysed, using Pt electrodesA. copper is deposited at cathode, sulpher is liberates at anodeB. copper is deposited at cathode, oxygen gas is liberated at andoeC. oxygen gas is liberated at cathode, copper is deposited at anodeD. sulphur is deposited at cathode, oxygen gas is liberated at anode |
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Answer» Correct Answer - B Unless it is specified, we assume the solution to be concentrated. At cathode, copper is deposited on account of higher reduction potential: `Cu^(2+) + 2e^(-) rarr Cu` At anode, `O_(2)` gas is liberated on a account of lower reduction potential of water: `2H_(2)O rarr O_(2) + 4H^(+) + 4e^(-)` |
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| 148. |
Which group contains coloured ions out of the following ? 1. `Cu^+` 2. `Ti^(4+)` 3. `Co^(2+)` 4. `Fe^(2+)`A. 1,2,3,4B. 3,4C. 2,3D. 1,2 |
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Answer» Correct Answer - B Colour of trasition elements are due to presence of unpaired electrons. |
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| 149. |
Which of the following will not give positive chromyl chloride test?A. `CuCl_(2)`B. `NaCl`C. `ZnCl_(2)`D. `C_(6)H_(5)NH_(3)^(+)Cl` |
| Answer» Correct Answer - C | |
| 150. |
STATEMENT-1 : Chromium atom has electronic configuration `[Ar]3d^(5)4s^(1)` . and STATEMENT-2: Atomic number of chromium is 24 .A. Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1B. Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True , Statement-2 is FalseD. Statement-1 is False , Statement-2 is True |
| Answer» Correct Answer - B | |