Chemistry Questions and Answers August 17, 2020

Q1. The number of ions formed on dissociation of following complexes Co(NH3)5C1C12, Co(NH3)3C13, Co(NH3)4Cl2Cl are respectively (a) 3, 0, 2 (b) 2, 3, 1 (c) 2, 3, 2 (d) 3, 1, 2

Q2. The IUPAC name of following complex K3Fe(CN)6 is (a) Potassium hexacyanoiron(III) (c) Hexacyano potassiumferrate(II) (b) Potassium hexacyanoferrate (III) (d) Potassium cyanoferrate(III) TR

Q3. Which of the following ions will give test of all the ions present in it (a) Mohrs salt (b) K2Fe(CN)6 (c) pdC142 (d) Co(Cl)3(NH3)3

Q4. A coordination complex of platinum has an empirical formula PtCl3 (NH3)2(NO2). On reacting with excess silver nitrate, one mole of the complexes produces two moles of AgCl precipitate. The ionic formula of this complex is (a) Pt(NO2)(CI)3 (NH3)2 (c) Pt(NH3)2(NO2)(CI)C12 (b) Pt(NH3)2ClICI (NO) (d) Pt(NO)(NH3)2C12C1

Q5. The IUPAC name of the complex HN CI CI NH3 (a) diamminedichloroplatinum(II) (c) transdiamminedichloroplatinum(II) C (b) bis(amminechloro)platinum(II) (d) cisdiamminedichloroplatinum(II)

Q6. Consider the following statments A. In primary bonding, position charge of metal is balanced by negative ions. B. In secondary bonding, moleculesions are attached directly to metal ion. ondern ein The correct option is (a) T, F (b) T, T (c) F, F (d) F, T

Q7. The incorrect statement regarding secondary valences are (a) they are ionisable (c) they are nonionisable (b) attached directly to metal ion (d) equal to the coordination number

Q8. For the given binary compounds, CoCl3, FeCl3 and PtCl2, the primary valences are (a) 3, 2, 2 respectively (b) 2, 2, 2 respectively (c) 3, 3, 2 respectively (d) 0, 0, 0 respectively

Q10. The IUPAC name of (NH3)4C0(OH)(NH)C0(NH3)44 IS (a) hydroxouamidobis (tetraaminecobalt) (IV) (b) amidouhydroxobis (tetraamminecobalt)(IV) (c) tetraamminecobaltuamidouhydroxotetramminecobalt(IV) (d) bis(tetraamminecobalt)amidouhydroxy(IV) MIST

Q11. Which of the following is not a double salt (a) (NH4)2Fe(SO4)2 6HO (b) KAl(SO4)212H0 (c) KLIFe(CN)6 (d) Fe2(SO4)3

Q.13 When AgNO3 is added to a solution of Co(NH3)4 Cl3, one chlorine satisfy primary valency and two chlorines satisfy both primary and secondary valences. This means the formula of complex is (a) Co(NH3)4C1C12 (b) Co(NH3)4C12C1 (c) Co(NH3)3C13 NH3 (d) Co(NH3)3C12C12 (NH3) TA

Q.14 The IUPAC nomenclature of Co(NH2CH2CHNH2)2Cl2 is (a) dichlorobis(ethylenediammine) cobalt(III) (b) bis(ethylenediamine) dichlorocobalt(I) (c) dichlorobislethylenediamine) cobalt(I) (d) bis(ethylenediamine) dichlorocobalt(III)

Q.15 A complex is comlposed of one chromium, three bromides and six water molecules. Upon addition of excess AgNO3, 1.0g aqueous solution of a complex gave 0.94g of AgBr. The molecular formula of complex is (Atomic height Cr 52, Br 80, Ag 108, H 1, 0 16) (a) Cr(H0)6Br3 (b) Cr(HO)5 BrBr2 HO (c) (d) Cr(HO)3 Br3.3HO Cr(HO)4Br2Br2HO

Part 1 The table below reports the actual inflation rate from 2016 to 2020. Complete the table, assuming people form expectations adaptively. Give all answers to two decimals. Year 2016 2017 2018 2019 2020 Actual inflation rate 3 3.50 5.00 3.50 1.50 Expected inflation rate a) d) e) 3 3.50 b) Choose one or more in A. When inflation is decreasing

The acid listed below Based on the (Acid) and (Ka) given. HOAc 1.8 x 105 HCIO 1.8 x 104 HCHO23.0 x 108 HF 6.8 x 104 is the strongest acid

Question The equilibrium constant for the gas phase reaction. Is Keq 2.80 x 102 at 999 Kat equilibrium of what a) Products predominate b) Only reactants are present c) Only products are presents d) Roughly equal amounts of products and reactants are represented e) Reactants predominate

Q1. The complexes Co(NH),CISO and Co(NH),SOCl represent an example of (a) ligand isomerism (b) linkage isomerism (c) coordination isomerism (d) ionization isomerism

Q2. The existence of two different coloured complexes of Co(NH) Cl, is due to (a) optical isomerism (b) linkage isomerism (c) geometrical isomerism (d) coordination isomerism TR

Q3. The complex Co(HO) C1NO, and CoCHO) CI(NO)C1 is an example of (a) linkage isomer (b) positional isomer (c) ionization isomer (d) optical isomer

Q4. Select the incorrect match (a) PtCl(NCS)(NH),, PtCl(SCN)(NH) linkage isomerism (b) Co(1,2diaminopropane), Cl, Co(1,3diaminopropane) Cl coordination isomerism (c) Ni(CN)(HO)(NH).CI, NiCl(HO)(NH) JCNionization isomerism (d) None of these

pentaaminesulphatocobalt(III) bromide and pentaaminesulphatocobalt(III) iodide Q5. The compounds represent (a) linkage isomerism (b) ionization iso nerism (c) ligand isomerism (d) no isomerism

Q6. The complexes Co(NH) (HO)(NO)CI, and Co(NH)(CI)(ONO)C1HO is an example of (a) hydrate isomerism (b) linkage isomerism (c) ionization isomerism (d) all of these

Q7. Cr(NH),BrCl and Cr(NH),CIB can be distinguished by and isomerism shown is (a) BaCl, ionization (b) AgNO,, ionization (c) AgNO,, coordinate (d) BaCl, linkage

Q8. The ionization isomer of Co(H) (NO)CIJCI is (a) Co(NH,),(C,N, (c) Co(NH, , CIONO)ICI (b) Co(NH) CL(NO) (d) Co(NH) CL(NO)HO

Q9. The total possible coordination isomers for the following compounds respectively are Co(en),Cr(C0) Pt(NH)PtCl (a) 4,4 (b) 2, 2 (c) 2,4 (d) 4, 2

Q10. The isomerism that are possible in the Co(III) complexes Co(NH),(NO) and Co(NH), (NO)C1 respectively are (a) coordination and position (c) geometrical and linkage (b) optical and linkage (d) optical and optical

Q11. (H3N) 4Co. H Co(NH3)2C1 0 exhibit which type of isomerism (a) position isomerism (c) ligand isomerism and C1(HN), Co HZ H (b) linkage isomerism (d) ionization isomerism Co(NH3)Cl Y

Q12. Which of the following is an example of coordination isomerism (a) Co(NH),BrSO, and Co(NH3),SOBr (b) Co(NH),NOCl, and Co(NH),ONOJCI, (c) Cr(HO) Cl, and Cr(HO),Cl Cl HO (d) Cr(NH) Co(CN), and Co(NH)Cr(CN) MISTI

Q1. The number of possible isomers for the octahedral complex ion Co(en)C1(NH) (a) 2 (b) 4 (c) 6 (d) 8

Q2. The number of total isomers of the complex Pd C1(I) (Br) (a) 2 (b) 3 (c) 0 (d) 4

Q3. The number of geometrical isomers for a complex Ma,b,c type are (a) 2 (b) 4 (c) 3 (d) 6 TR

Q4. For a complex Pt (NH), (Py),C1,1, total number of stereoisomer are (a) 5 (b) 6 (c) 4 (d) 7 ST

Q5. For the complex Mo(C,H,N),(CO),, (a) 2 (b) 3 how many isomers will be there (c) 1 1

Q6. The number of stereoisomers for Cogly), and Co(en), respectively are (a) two and two (b) four and two (c) two and four (d) four and zero

Q7. Among the following complexes, (i) Ru(bpy), (iii) transCrCl(oxalate) The one that shows chirality (a) (i), (ii) (b) (ii), (iii), (iv) (ii) CrEDTA (iv) cisCrCi(oxalate) (c) (i), (iii), (iv) (d) (i), (ii), (iii)

Q8. The complex that exists as a pair of enantiomers is (a) transCo(HNCHCHNH)Cl (c) Pt(PPh)(Cl)(Br)(CH) (b) cisCo(NH,),C (d) Co(H,NCH,CH,NH,),3

Q9. The number of possible isomers for Ru(bpy)Cl is (bpy 2,2bipyridine) (a) 2 (b) 3 (c) 4 (d) 5

Q1. Which of following do not exist on basis of electroneutrality principle (a) Be(HO)42 (b) NiF64 (c) Ni(H0)6 (d) CoC16

Q2. Arrange the compound is increasing order of thermodynamic stability. (ii) Mg(HO)6 (i) Na(H0)6 (a) (iv) (iii) (ii) (i) (c) (i) (ii) (iii) (iv) 13 (iii) Al(HO)6 (iv) SF6 (b) (iii) (ii) (i) (iv) (d) (iv) (i) (ii) (iii) TR

Q3. Which of the following is incorrect order of stability (a) Al(HO)63

Q4. Correct order of stability of complex according (a) Be(OH)61 Be(OH2)4 Be(NH3)4 (b) Be(NH3)4 Be(OH2)4 Be(OH)61 (c) Be(OH)4 Be(OH2)6 Be(NH3)4 (d) Be(OH2)42 Be(NH3)42 Be(OH2)61 to electroneutrality principle is

Q5. Arrange the compounds in increasing order of thermodynamic stability (i) Al(NH)3 (a) iii iii iv (iii) Al(F.) (c) iii iii iv 3 (ii) Al (HO) (b) iviiiii (iv) Mg(HO)2 (d) iii iii iv

Q6. Which of the pairs will generally result in tetrahedral coordination complexes, when ligands are Clor OH (A) Be(II), (Ba)(II) (a) A and B (B) Ba(II), Co(II) (b) B and C (C) Co(II), Zn(II) (c) C and D (D) Be(II), Zn(II) (d) A and D

Q7. Which of the following compound exist (b) CoF (a) CoC16 (c) CoBr. (d) Col

Q8. According to electroneutrality principle the most suitable coordination number for most of the complexes of Cu is (a) 4 (b) 6 (c) 8 (d) 2

Q9. Correct statement about Ni(CN)3 isare (a) it doesnt exist (c) it is paramagnetic species 4 (b) it dimerises to give Ni2 (CN)6 (d) coordination number is 2

Q10. Which of the following species is not expected to be a ligand (a) NO (b) NH4 (c) NH NH3 (d) Co

Q11. Which of the following ligand does not act as bidentate ligand (a) dipy (b) dien (c) gly (d) dmg

Q12. Pyrazinium ion behave as (a) monodentate (c)Flexidentate (b) Ambidentate (d) No denticity in acidic medium TH

Q13. As a ligand Cl (a) Only odonor (c) Both o and donor (b) Only donor (d) A odonor and a acceptor

Q14. Diethylene triamine is (a) Chelating agent (c) Tridentate ligand (b) Polydentate ligand (d) All of these g

Q15. Among, RO, AsMe3, ROR, CN, AsMe3, RCO, SCN, the set of ligands with good acceptor nature are (a) RO, RCO, SCN (c) AsMe3, CN, SCN (b) RO, RCO, AsMe3 (d) RO, ROR, RCO

Q16. Which of the following statements are true about NO ligand. I. Can act as monodenate ligand II. Can act as bidentate ligand III. Act as flexidentate ligand IV. Act as Ambidentate ligand (a) I II TA (b) I IV (c) II IV (d) I, II, II IV

Q1. According to Kepert model which of the following possess least common geometries with coordination number 6. (a) Octahedral (c) Octahedral and trigonal prismatic both (b) Trigonal prismatic (d) None of the above

Q2. What is the geometry of YN(SiMe3)3 in solid state and Fe N(SiMe3)3 (a) trigonal pyramidal, trigonal planar respectively (b) trigonal planar, trigonal planar (c) trigonal pyramidal, trigonal pyramidal (d) trigonal planar, trigonal pyramidal respectively. STR

Q3. What is coordination number of Cu(I) in (i) Cu(CN), (ii) Cu(CN) (a) 3, 3 (b) 2,3 (c) 2, 2 (d) 3, 2

Q4. What is coordination number (a) 3, 3 Hg(II) in HgI and Hg(SP), (b) 2,3 (c) 2,2 (d) 3, 2

Q5. What is the correct order of bond angle in the following complexes (a) Cu(NH3) Cu(PH3) Cu(CO) (b) Cu(NH3) Cu(PH) Cu(CO), (c) Cu(NH3) Cu(PH3) Cu(CO) (a) Cu(NH3) Cu(PH) Cu(CO) CH

Q6. Which amongst the following are organometallic compounds (ii) KPtClCH (b) (iii) only (i) Al(CH) (a) (i) only (iii) N(CH), (c) (i), (ii) (d) (i), (ii) (iii)

Q7. A compound with empirical formula Co(NH),BrSO exist in two forms red and violet. Solution of red colour gives a precipitate of AgBr on addition of AgNO3. The violet form gives no precipitate on addition of AgNO, but gives a white precipitate on addition of BaCl, solution. The structure of red and violet colour complex is (a) Co(NH),SO,

8. How many from the following complex are stable. Ni(NH3)4, Ni(CN), Ni(CO), Ni(NH3)4, Ni(CN), Ni(CO)

9. How many from the following do not exist. NiCl , Ni(HO), Ni(CN), Ni(CO), NiF,, HgCl

10. How many metal centre from the following does not have linear environment. CuCl,, Ag(NH,), Au(CN), (R,P) AuCl, Au(PR,),, Hg(CN),, KCu(CN),, Fe(N(SiMePh), Cu(CN)

12. What is coordination number of Pt in Pt(Pcy3)3 complex

13. What is the coordiantion number of Cu in cyclic compound Cu(SPMe,)Cl,.

14. How many from the following have linear arrangement Au(CO),, Au(PH), Au(NH), Rh(NH3), Rh(PH), Rh(CO). l

15. What is the numbers of unpaired electrons in AuCl, Cu(CN) and Ag(NH) complexes.

1. Which of the following has lowest oxidation state of central atom (c) Fe(CO)5 (a) Fe3 Fe(CN)6 (b) NaCo(CO)4 (d) Co(en)3C13

2. On the basis of magnetic moment data the complex Co(NH) is found to be diamagnetic what can you say about the hybridisation of complex. (a) spd (b) dsp (c) pd (d) pd

3. KNiF6 is diamagnetic while K3CoF6 is paramagnetic what can you say about the hybridisation of complex. (a) dsp3, dsp3 (b) sp3d2, sp3d2 (c) spd, dsp3 (d) dsp3, sp3d

4. What is the geometry and point group of complex ZrMe.. (a) Octahedral, Oh (c) Trigonal prismatic, D3h (b) distorted octahedral C (d) distorted trigonal prismatic, C3,

6. What can you say about the geometry of complex Mo(SCH), and Re(SCPH), (a) Octahedral, Octahedral (c) Trigonal Prismatic, Octahedral (b) Octahedral, trigonal Prismatic (d) Trigonal Prismatic, Trigonal Prismatic

7. Among the following ions, which have the highest paramagnetism (a) Cr(HO) (b) Fe(HO), (c) Fe(HO) (d) Cu(HO)

8. In which of the following complexes the nickel metal is in highest oxidation state. (a) Ni(CO), (b) KNiF (c) Ni(NH), (BF) (d) KNi(CN),

9. In nitroprusside ion the iron and NO exist as Fe and NO rather than Fe and NO. These forms can be differentiated by (a) estimating the concentration of iron (c) measuring state magnetic moment (b) measuring the concentration of CN (d) thermally decomposing the compound

10. Ni(CN), and NICI have similarity but not in (b) Coordination number (d) Both in (a) and (c) (a) Magnetic moment (c) Structure

11. Which of the following is true for Ni(en) (a) Paramagnetic, dsp, square planar, C. N. of Ni 2 (b) Diamagnetic dsp, square planar, C. N. of Ni 4,(c) Diamagnetic, sp, tetrahedral, C. N. of Ni 4 (d) Paramagentic, sp, square planar, C. N. of Ni 4

12. Among Ni(CO), Ni(CN), and NiCl (a) Ni(CO), and Ni(CN), are diamagnetic and NiCl is paramagentic (b) Ni(CO), and NiC12 are diamagnetic and Ni(CN), is paramagnetic (c) Ni(CO), is diamagnetic and Ni(CN) and NiCl are paramagnetic (d) NiCl and Ni(CN), are diamagnetic and Ni(CO), is paramagnetic

13. The structure of the complexes Cu(NH3)4(CIO), are (a) Square planar and tetrahedral (c) Octahedral and trigonal bipyramedal and Cu(NH3)4CIO, in the solution respectively (b) Octahedral and square pyramidal (d) Tetrahedral and square planar

15. Out of Fe(CN), Ni(CN), and Ni(CO), (a) All have identical geometry (b) All are paramagnetic (c) All are diamagnetic (d) Fe(CN), is diamagnetic but Ni(CN), and Ni(CO), are paramagnetic

1. Which of the following theory is based on purely electrostatic interaction between the ligands and the metal ion (a) Werners theory (b) Crystal field theory (c) Ligand field theory (d) Valance bond theory

2. In presence of a spherically symmetrical field of negative charges around metal, what is observed (a) orbitals remains degenerate but their energy is raised (b) orbitals remains degenerate and no effect on their energy (c) splitting of orbitals takes place (d) only energy of orbitals is lowered. ISTRY

Question When 50 ml of 1.00 M NaOH is mixed with 50 ml of 1.00 M HCl in a calorimeter. The temperature is increased. The initial temperature (Ti) is 20.1 C 0 and the final temperature (Tf) is 23.4 C 0 . Assume the density of both HCl and NaOH is 1.00 g / ml and the specific heat is 4.184 J/g.C 0 . Calculate the following Calculate the enthalpy

Barbara Andrade is an equity analyst who covers the entertainment industry for: Greengable Capital Partners, a major global asset manager. Greengable owns a significant position with a large unrealized capital gain in Mosely Broadcast Group (MBG). On a recent conference call, MBGs management states that they plan to increase the proportion of debt

Q. Shown below is the unfolded cube map of six faces. Suppose that a reflection ray is computed and its direction is along (0.5, 0.4, 0.2). sorry for weird rotated picture. I can't rotate properly. (a) Which face of the cube map does the reflection ray hit? A. face +x is selected. (b) What are the 2D coordinates of the intersection point between

2 y Y 2 x Y X y 8. Y Y 2. X z X x y y 4 X

A monopoly firm faces two consumers one whose demand is Q1 8 P. The others demand is Q2 162P. The firm has zero costs C(Q) 0. You may want to graph demand. a. Derive (points for steps) the firms profitmaximizing price if it cannot price discriminate. Label it P1. b. Given the price in a, derive the profitmaximizing fixed fee the firm could

3) Define Buffer. Explain how to make Buffer. Explain how a Buffer prevents changes in pH when an Acid is added When a Base is added

4) 25 grams of Acetic Acid was dissolved in 250 mL of Water, What is the Molarity of the Solution

5) 47.5 mL of 0.562 M NaOH Solutions is needed to neutralize a 25 mL Vinegar Solution. What is the Molarity of the Vinegar Solution How many Moles of Acetic Acid is in the Vinegar Solution How many grams of Acetic Acid are in the Solution What is the mv for the Vinegar Solution

explain briefly the following observations : s& p block elements rarely form complexes Explain why the oxidation state of Al is 3+ , while that of Ga is 1+ yet they belong to the same family using examples , state 3 diagonal relationships between aluminum and beryllium

Can you light diamond on fire?

A 0.01874 M AgNO 3 , solution is used to titrate a 45 ml sample of an unknown chloride solution. Three drops of potassium chromate solution are added to the unknown. It requires 36.88 mL of the AgNO 3 , solution to change the color of the solution from yellow to peach. Compute the molarity of chloride ion in the unknown. (Note that Ag + reacts

Explain why the persistence of the peach (reddish-yellow) color in the solution indicates the equivalence point in the titration.

Prefix Symbol Exponent Prefix Symbol Exponent yotta Y 1024 yocto y 1024 zetta Z 1021 zepto Z exa E atto peta P tera T giga G mega M kilo k hecto h deca da 1018 1015 1012 10 106 10 10 10 a femto f pico nano n micro milli centi deci d m 1021 1018 1015 1012 109 106 103 10 101,Activity 1 Write the following in scientific notation using Table 3 above

Prefix Symbol Exponent Prefix Symbol Exponent yotta Y 1024 yocto y 1024 zetta Z 1021 zepto Z exa E atto peta P tera T giga G mega M kilo k hecto h deca da 1018 1015 1012 10 106 10 10 10 a femto f pico nano n micro milli centi deci d m 1021 1018 1015 1012 109 106 103 10 101,Activity 2 Rewrite the following data using the prefixes in Table 3 above

1. Butane is a common fuel used in cigarette lighters and camping stoves. Normally supplied in metal containers under pressure, the fuel exists as a mixture of liquid and gas, so high temperatures may cause the container to explode. At 25.0 C, the vapor pressure of butane is 2.3 atm. What is the pressure in the container at 135 C (AHvap 24.3

8. The Henrys law constant (kH) for O2 in water at 20 C is 1.28 x 103 molL atm. How many grams of O2 will dissolve in 2.50 L of H2O that is in contact with pure O2 at 1.00 (a) atm (b) How many grams of O2 will dissolve in 2.50 L of H2O that is in contact with air, where the partial pressure of O2 is 0.209 atm

12. An automobile antifreeze mixture is made by mixing equal volumes of ethylene glycol (d 1.114 gmL Mr 62.07 gmol) and water (d1.00 gmL) at 20 C. The density of the mixture is 1.070 gmL. Express the concentration of ethylene glycol as (a) Volume percent (b) Mass percent (c) Molarity (d) Molality (e) Mole fraction

14. How many moles of solute particles are present in 1 L of each of the following aqueous solutions (a) 0.3 M KBr (b) 0.065 M HNO3 (c) 104 M KHSO4 (d) 0.06 M ethanol (C2H5OH) Solution

15. Calculate vapor pressure of solution of 34.0 g of glycerol (C3H803) in 500.0 g of water at25 C. The vapor pressure of water at 25 C is 23.76 torr. (Assume ideal behaviour.)