MCQ 11 MarkThe number of unpaired electrons in $ Cu^{2+} $ ion (Z=29) is:A$0$✓1C2D3AnswerCorrect option: B. 1BView full question & answer→
MCQ 21 MarkThe maximum oxidation state of chromium is:A$+ 2$B$+3$C$+4$✓$+6$AnswerCorrect option: D. $+6$DView full question & answer→
MCQ 31 MarkWhich of the following has maximum number of unpaired electrons?A$ Mg^{2+} $B$ Ti^{3+} $C$ V^{3+} $✓$ Fe^{3+} $AnswerCorrect option: D. $ Fe^{3+} $DView full question & answer→
MCQ 41 MarkWhich of the following has the smallest bond angle?A$ H_{2}O $B$ H_{2}S $C$ H_{2}Se $✓$ H_{2}Te $AnswerCorrect option: D. $ H_{2}Te $DView full question & answer→
MCQ 51 MarkIn which of the following elements 4f energy level is gradually filled?✓LanthanidesBactinidesCTransition metalsDCoinage metalsAnswerCorrect option: A. LanthanidesAView full question & answer→
MCQ 61 MarkThe element showing highest oxidation state among first transition series is:ANiBCrCFe✓MnAnswerCorrect option: D. MnDView full question & answer→
MCQ 71 MarkWhich of the following metal does not replace hydrogen?AZnBFe✓CuDMgAnswerCorrect option: C. CuCView full question & answer→
MCQ 81 MarkWhich of the following oxides shows ferro-magnetism?✓$ CrO_{2} $B$ MnO_{2} $C$ Fe_{3}O_{4} $D$ V_{2}O_{5} $AnswerCorrect option: A. $ CrO_{2} $AView full question & answer→
MCQ 91 MarkOut of the following transition elements, the maximum number of oxidation states are shown by:ASc (Z=21)BCr (Z=24)✓Mn (Z=25)DFe (Z=26)AnswerCorrect option: C. Mn (Z=25)CView full question & answer→
MCQ 101 MarkTransition elements are also known as:As-block elementsBp-block elements✓d-block elementsDf-block elementsAnswerCorrect option: C. d-block elementsCView full question & answer→
MCQ 111 MarkCopper sulphate solution on treatment with excess of KI gives whitish precipitate. The precipitate is:A$ Cu I_{2} $✓$ Cu_{2} I_{2} $C$ Cu_{2}SO_{4} $D$ I_{2} $AnswerCorrect option: B. $ Cu_{2} I_{2} $BView full question & answer→
MCQ 121 MarkOxidation state of gold metal is:✓$+1$B$0$C$-1$Dall of theseAnswerCorrect option: A. $+1$AView full question & answer→
MCQ 131 MarkWhich of the following compound has tetrahedral geometry?✓$ [Ni(CN)_{4}]^{2-} $B$ [Pd(CN)_{4}]^{2-} $C$ [PdCl_{4}]^{2-} $D$ [NiCl_{4}]^{2-} $AnswerCorrect option: A. $ [Ni(CN)_{4}]^{2-} $AView full question & answer→
MCQ 141 MarkShape of d-orbital is:ACircle✓Double DumbbelCDumbbelDNone of theseAnswerCorrect option: B. Double DumbbelBView full question & answer→
MCQ 151 MarkOutermost configuration $ 3d^{6}4s^{2} $ is of:ACaBZnCMg✓FeAnswerCorrect option: D. FeDView full question & answer→
MCQ 161 MarkWhich block of element are known as transition elements?Ap-blockBd-block✓s-blockDf-blockAnswerCorrect option: C. s-blockCView full question & answer→
MCQ 171 MarkGreen vitriol is:✓$ FeSO_{4}.7H_{2}O $B$ CaSO_{4}.2H_{2}O $C$ CuSO_{4}.5H_{2}O $DNone of theseAnswerCorrect option: A. $ FeSO_{4}.7H_{2}O $AView full question & answer→
MCQ 181 MarkThe formula of calomal is:A$ Hg_{2}Cl_{2} $B$ HgCl_{2} $C$ HgCl_{2}.H_{2}O $✓NoneAnswerCorrect option: D. NoneDView full question & answer→
MCQ 191 MarkWhich metal has minimum melting point:AHg✓CsCMnDCuAnswerCorrect option: B. CsBView full question & answer→
MCQ 201 MarkWhich of the following has max. paramagnetism?A$ [Cr(H_{2}O)_{6}]^{3+} $✓$ [Fe(H_{2}O)_{6}]^{2+} $C$ [Cu(H_{2}O)_{6}]^{2+} $D$ [Zn(H_{5}O)_{6}]^{2+} $AnswerCorrect option: B. $ [Fe(H_{2}O)_{6}]^{2+} $BView full question & answer→
MCQ 211 MarkWhich of the following central metal has oxidation state + 6?✓$ CrO_{2}Cl_{2} $B$ NiF_{6}^{2-} $C$ Cr(CN)_{6}^{3-} $D$ MnO_{4}^{-} $AnswerCorrect option: A. $ CrO_{2}Cl_{2} $AView full question & answer→
MCQ 221 MarkComponent in brass alloys are:AZn and CuBCu and SnCZn and Sn✓Cu, Zn and SnAnswerCorrect option: D. Cu, Zn and SnDView full question & answer→
MCQ 231 MarkWhich of the following forms colour salt?✓$ Cu^{+} $B$ Zn^{2+} $C$ Ag^{2+} $D$ Fe^{3+} $AnswerCorrect option: A. $ Cu^{+} $AView full question & answer→
MCQ 241 MarkDental amalgum, used in the filling of dental cavity is:AAg and HgBAu and HgCAu, Sn and Hg✓Ag, Sn and HgAnswerCorrect option: D. Ag, Sn and HgDView full question & answer→
MCQ 251 MarkWhich of the following cation does not form complex with ammonia?A$ al^{3+} $B$ ag^{+} $C$ Cu^{2+} $✓$ Cd^{2+} $AnswerCorrect option: D. $ Cd^{2+} $DView full question & answer→
MCQ 261 MarkSpecific character of transition metals is:AColourBParamagnetism✓Definative ValencyDNoneAnswerCorrect option: C. Definative ValencyCView full question & answer→
MCQ 271 MarkWhich of the following transition elements shows highest oxidation state?ACrBMnCFe✓VAnswerCorrect option: D. VDView full question & answer→
MCQ 281 MarkThe equivalent weight of $ K_{2}Cr_{2}O_{7} $ is:Aatomic WeightB$ \frac{1}{2} $ x atomic WeightC$ \frac{1}{5} $ x atomic Weight✓$ \frac{1}{6} $ x atomic WeightAnswerCorrect option: D. $ \frac{1}{6} $ x atomic WeightDView full question & answer→
MCQ 291 Mark$ H^{+} $ ion reduce easily by:✓$ Zn^{2+} $B$ Cu^{2+} $C$ ag^{+} $D$I_2$AnswerCorrect option: A. $ Zn^{2+} $AView full question & answer→
MCQ 301 MarkMetals, which oxidise easily:ACuBAg✓AlDPtAnswerCorrect option: C. AlCView full question & answer→
MCQ 311 MarkWhich of the following ion has maximum magnetic moment?✓$ Mn^{2+} $B$Fe ^{2-}$C$ Ti^{2+} $D$ Cr^{2+} $AnswerCorrect option: A. $ Mn^{2+} $AView full question & answer→
MCQ 321 MarkThe atomic number of Cr and Fe are 24 and 26 respectively. Which of the following is paramagnetic with electron spin?A$ [Cr(CO)_{6}] $B$ [Fe(CO)_{5}] $C$ [Fe(CN)_{6}]^{-4} $✓$ [Cu(NH_{3})_{6}]^{+3} $AnswerCorrect option: D. $ [Cu(NH_{3})_{6}]^{+3} $DView full question & answer→
MCQ 331 MarkThe general electronic configuration of lanthanides is:✓$(n-2) f^{1-14}(n-1)^{s^2} p^6 d^{0-1} n s^2$B$(n-2) f^{10-14}(n-1) d^{0-1} n s^2$C$(n-2) f^{0-14}(n-1) d^{10} n s^2$D$(n-2) d^{0-1}(n-1) f^{1-4} n s^2$AnswerCorrect option: A. $(n-2) f^{1-14}(n-1)^{s^2} p^6 d^{0-1} n s^2$AView full question & answer→
MCQ 341 MarkWhen $ MnO_{2} $ fuses with KOH, a coloured compound is formed. The product and its colour is:✓$ K_{2}MnO_{4} $ GreenB$ KMnO_{4} $ VioletC$ Mn_{2}O_{3} $ BrownD$ Mn_{3}O_{4} $ BlackAnswerCorrect option: A. $ K_{2}MnO_{4} $ GreenAView full question & answer→
MCQ 351 Mark$ (NH_{4})Cr_{2}O_{7} $ gives gas on heating. Similar gas will be produced:✓$ NH_{4}NO_{2} $ on heatingB$ NH_{4}NO_{3} $ on heatingC$ H_{2}O_{2} $ reacts with $ NaNO_{2} $DOn heating $ Mg_{3}N_{2} $ with $ H_{2}O $AnswerCorrect option: A. $ NH_{4}NO_{2} $ on heatingAView full question & answer→
MCQ 361 MarkThe oxidation product of $I ^{-}$ with $ MnO_{4}^{-} $ in basic medium is:✓$ IO_{3}^{-} $B$ I_{2} $C$ IO^{-} $D$ IO_{4} $AnswerCorrect option: A. $ IO_{3}^{-} $AView full question & answer→
MCQ 371 MarkWhich of the following compound pairs have slightly coloured aqueous solution?A$ FeCl_{2} $, $ CuCl_{2} $✓$ VOCl_{2} $, $ CuCl_{2} $C$ VOCl_{2} $, $ FeCl_{2} $D$ FeCl_{2} $, $ MnCl_{2} $AnswerCorrect option: B. $ VOCl_{2} $, $ CuCl_{2} $BView full question & answer→
MCQ 381 MarkPseudo halides in following is:✓$CN ^{-}$BICIC$I \overline{3}$D$ IF_{5} $AnswerCorrect option: A. $CN ^{-}$AView full question & answer→
MCQ 391 MarkIf the bond length of CO bond in carbon monoxide is 1.128 Å then what is the value of CO bond length in $ Fe(CO)_{5} $?A1.15 ÅB1.28 ÅC1.72 Å✓1.118 ÅAnswerCorrect option: D. 1.118 ÅDView full question & answer→
MCQ 401 MarkInvar is alloy of Fe and Ni, which is used in watches and metre scale. Its important property is:✓Lowest coefficient of expansionBResistance of corrosionCResistance to waterDMagnetic natureAnswerCorrect option: A. Lowest coefficient of expansionAView full question & answer→
MCQ 411 MarkThe process of gradually cooling of red hot steel is:AWarmingBHardeningCCooling✓AnnealingAnswerCorrect option: D. AnnealingDView full question & answer→
MCQ 421 MarkLanthanide contraction is responsible for:AThe radii of Zr and Y are approximately similarBThe oxidation state of Zr and Nb is equal✓The radii of Zr and $H ^{+}$ are approximately similarDThe oxidation state of Zr and Zn is equalAnswerCorrect option: C. The radii of Zr and $H ^{+}$ are approximately similarCView full question & answer→
MCQ 431 MarkWhich is not true in the following?✓$ La(OH)_{3} $ is less basic than $ Lu(OH)_{3} $BIn lanthanoid series the ionic radii decreases in $ Ln^{3+} $CLa is not the element of transition seriesDThe size of Zn and Hf are similar due to lanthanide contractionAnswerCorrect option: A. $ La(OH)_{3} $ is less basic than $ Lu(OH)_{3} $AView full question & answer→
MCQ 441 MarkWhich of the following is not an element of first row of transition series?AFeBCr✓MgDNiAnswerCorrect option: C. MgCView full question & answer→
MCQ 451 MarkWhich one of the following is diamagnetic ion?A$ Co^{2+} $B$ Ni^{2+} $C$ Cu^{2+} $✓$ Zn^{2+} $AnswerCorrect option: D. $ Zn^{2+} $DView full question & answer→