General Questions and Answers

How much heat will be released when the temperature of 1 mol of water changes from 90 C to 80 C Given Specific heat of water 4 18 J g K 1

Out of the following which complex will show geo metrical isomerism 1 Pt NH Cl 3 Na Ni CN 2 Ni CO 4 4 K Ag CN

Which one of the following high spin complexes has the largest CFSE Crystal field stabilization energy 1 Mn H O 1 3 Mn H O 13 2 Cr H O 4 Cr H O 1

34 The number of molecules present in 4 4 g of CO gas is Jipmer 1990 1 6 023 10 3 3 6 023x1024 2 5 023 10 3 4 6 023x10 2

The value of the spin only magnetic moment for one of the following configurations is 2 84 BM The correct one is 1 d in strong ligand filed 2 d in weak ligand filed 3 d in weak as well as in strong fields 4 d5 in strong ligand filed

Which of the following pair the EAN of central metal atom is not same 1 Fe CN and Fe NH 1 2 Cr NH 1 and Cr CN 3 FeF and Fe CN 1 4 Ni CO and Ni CN 1

5 The reaction s leading to the formation of 1 3 5 trimethylbenzene is are ai listan sdi 30 Conc H SO A A 04b0281 005 nimalo droplets 1 Br NaOH 2 H O to guinita sauso br D 3 Sodalime A C 0 B MeH Jon avond noob lood y CHO Heated iron tube 873 K bizidla OHC CHO Om to latido ort of nonenob od sdr 00 Zn Hg HCI

For FeF and Fe CN magnetic moment of the fluoride complex is expected to be 3 6 1 The same as the magnetic moment of the cyanide complex 2 Larger than the magnetic moment of the cyanide complex because there are more unpaired electrons in the fluoride complex 3 Smaller than the magnetic moment of the cyanide complex because there are more unpaired electrons in the fluoride complex 4 Larger than the magnetic moment of the cyanide complex because there are fewer unpaired electrons in the fluoride complex

The type of isomerism exhibited Rh en Cl Rh en Cl and Rh en RhCl is Dins 1 Linkage 3 Ligand 2 Coordination 4 Ionisation

Which contains least no of molecules 1 1 g CO 2 1 g N 4 1 g H 3 1 g 0 2 Rweigh

Which of the following coordination compounds would exhibit optical isomerism 1 tris ethylenediamine cobalt III bromide 2 pentaamminenitrocobalt III iodide 3 diamminedichloroplatinum II 4 trans dicyanobis ethylenediamine chromium III chloride

surement get the accepted measured curacy of aller the nsitivity hat can ipment ling of in the is 10 2 about Sint in e least aning value 10 3 E 0 1 of e or Multiple readings of the same quantity are noted to minimize the error If the readings match closely they are said to have high precision High percision implies reproducibility of the readings High precision is a prerequisit for high accuracy Precision is expressed in terms of deviation An absolute deviation is the modulus of the difference between an observed value and the arithmetic mean for the set of several measurements made in the same way It is a measure of absolute error in the repeated observation Absolute deviation Observed value Mean Arithmetic mean of all the absolute deviations is called the mean absolute deviation in the measurements The ratio of mean absolute deviation to its arithmentic means is called relative deviation Relative deviation Mean absolute deviation Mean lue eful ris x 100 Problem 2 5 In laboratory experiment 10 g potassium chlorate sample on decomposition gives following data The sample contains 3 8 g of oxygen and the actual mass of oxygen in the quantity of

Which statement is incorrect 1 Ni CO Tetrahedral paramagnetic 2 Ni CN 2 Square planar diamagnetic 3 Ni CO Tetrahedral diamagnetic 4 NiCl 2 Tetrahedral paramagnetic

Which one of the following complex ions has geometrical isomers 1 Co en 3 Co NH en 3 en ethylenediamine 2 Ni NH3 Br 4 Cr NH3 4 en

The complex exhibit lowest energy absorption bond is 1 NiCl 2 Ni CO 3 Ni CN 1 4 Ni H O

The pair of molecules that exhibit grometrical isom erism are 1 Cr NH Cl and Co NH Cl 2 Cr NH Cl 2 and Co NH CI 3 Cr NH 1 and Co NH 1 4 All of the above show geometric isomerism 2

A magnetic moment of 1 73 BM will be shown by one among of the following compounds 1 Cu NH 12 3 TiCl4 2 Ni CN 1 4 CO I 1

Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour 1 Cr CN 1 3 Fe CN 1 2 Mn CN 1 4 Co CN 1

Property 19 N 2g a No of electrons in 5 b No of electrons in e 0 c No of electrons in t 6 2919 g iv Fe CN 14 bbsgillo d No of electrons in e 2 to sorisede ni eashuol 9 Complexes i CoC ii Co OX d iii Co H O poesig of sub et dur 300

If A P the correct electronic configuration for d4 system will be 0 1 te 4 3 to t 3 2 te 2 4 t e 2g 125

Practice Problem 109 What maximum volume of 3 M solution of KOH can be prepared from 1 each of 1 M KOH and 6 M KOH solutions by using water Practice Problem 110 40

3 The octahedral complex of a metal ion M with four monodentate ligands L L L3 and Labsorb wavelength in the region of red green yellow and blue respectively The increasing order of ligand strength of the four ligands is 1 L3 L L4 L 2 L L L4 L3 3 L4 L3 L L 242

The correct order for the wavelength of absorption in the visible region is 1 Ni NO Ni NH3 Ni H O 2 Ni NO Ni H O 2 Ni NH3 3 Ni H O Ni NH3 Ni NO 4 Ni NH3 Ni H O Ni NO 6

The crystalline salt Na SO4 xH O on heating loses 55 9 of its mass and becomes anhydrous The formula of crystalline salt is 2 Na SO4 7H O 4 Na SO4 10H O 1 Na SO4 5H O 3 Na SO4 2H O

Considering H O as a weak field ligand the num ber of unpaired electrons in Mn H O will be At no of Mn 25 1 Four 2 Three 3 Five 4 Two

Among the ligands NH3 en CN and CO the correct order of their increasing field strength is 1 CO NH en CN 2 NH en CN CO 3 3 CN NH3 CO en 4 en CN NH CO

Hexafluoroferrate III ion is an outer orbital com plex The number of unpaired electrons are 1 1 3 4 2 5 4 Unpredictable

Which of the following statements about Fe CO is correct 1 It is paramagnetic and high spin complex 2 It is diamagnetic and high spin complex 3 It is diamagnetic and low spin complex 4 It is paramagnetic and low spin complex

The spin only magnetic moment in units of Bohr magneton ug of Ni2 in aqueous solution would be At No Ni 28 1 O 2 1 73 3 2 84 4 4 90

How many maximum spectral lines are possible electron is present in 4th shell and only two ator are present in sample 1 6 2 4

A compound has the empirical CoCl 5NH When an aqueous solution of this compound is mixed with excess silver nitrate 2 mol of AgCl precipitate per mol of compound On reaction with excess HCl no NH is detected Hence it is 3 3 5 1 Co NH Cl Cl 2 Co NH3 CI Cl 2 3 Co NH C 4 Co NH Cl CH NH 3

The complexes Co NO NH Cl and Co ONO NH3 Cl are the examples of 1 Coordination isomerism 2 Ionisation isomerism 3 Geometrical isomerism 4 Linkage isomerism

3 Which of the following contains one unpaired electron in the 4p orbitals 1 Cu NH 3 Cu CN 1 2 Cu NH 4 Ni CN 1 2

Which is true for Ni en 12 Z Ni 28 1 paramagnetism dsp square planar C N of Ni 2 2 diamagnetism dsp square planar C N of Ni 4 3 diamagnetism sp tetrahedral C N of Ni 4 4 paramagnetism sp tetrahedral C N of Ni 4

A sample of an ethanol water solution has a volume of 55 0cm and a mass of 50 0gm Assume that there is no change in volume compounds are mixed The density of ethanol is 0 80gm cm and that of water is 1 00gm cm What doesn t the percentage of ethanol by mass in the solution

Insulin contains 3 4 sulphur the minimum molecular weight of insulin is 1 941 176 3 945 27 2 944 4 None

1 1 0 x 104 3 1 0 x 1010 4 1 0 10 4 163 A certain buffer solution contains equal concentration of X and HX The K for X is 10 10 the pH of the buffer is 1 4 2 9 3 10 4 7

3 100000 4 200000 An amount of 0 3 mole of SrCl is mixed with 0 2 mole of K PO The maximum KC1 which may form will be 1 0 6 2 0 5 3 0 3 4 0 1

If EAN of a central metal ion X 2 in a complex is 34 and atomic number of X is 28 The number of ligands present in complex are 2 4 monodentet 1 3 3 6 4 2

The relation between osmotic pressures at 273 K when 20 g glucose P 20 g urea P and 20 g sucrose P3 are dissolved in 250 ml of water is 1 P P P3 3 P P P3 2 P3 P P2 4 P2 P3 P

4 Among Ni CO 4 Ni CN 1 NiCl 1 species the hybridization states at the Ni atom are respectively At no of Ni 28 1 dsp sp sp 3 sp dsp sp 2 sp dsp2 dsp 4 sp sp dsp

FeCl K Fe CN H O Precipitate The colour of the precipitate is 1 Sky blue 2 Brown A White

What will be the theoretical value of spin only magnetic moment when Fe SCN reacts with a solution containing Fions to yield a complex 1 2 83 B M 2 3 87 B M 4 1 73 B M 3 5 92 B M

Both Co and Pt4 have a coordination number of six Which of the following pairs of complexes will show approximately the same electrical conductance for their 0 001 M aqueous solutions 1 CoCl3 4NH and PtCl4 4NH3 2 CoCl 3NH and PtCl4 5NH3 3 CoCl3 6NH3 and PtCl4 5NH3 4 CoCl3 6NH and PtCl4 3NH3

Which of the following sets is are example of co ordination isomerism in complexes 1 Co NH Cr CN and Co CN Cr NH3 2 Cr H O Cl Cl H O and Cr H O CI JCI 2H O 3 Co NH Br SO and Cr NH SO4 Br 4 Pt NH Cl and Pt NH3 4 PtCl 2

Nickel Z 28 combines with a uninegative monodentate ligand X to form a paramagnetic complex NiX The number of unpaired electron s in the nickel and geometry of this complex ion are respectively 1 one square planar 3 one tetrahedral 2 two square planar 4 two tetrahedral

nd 6 M KOH solutions by using water Practice Problem 110 4 9 g K Cr O is dissolved in 250 ml solution for the oxidation FeSO in medium Find the normality of K Cr O solution

59 How many electrons 1 0 1 NA 3 8 NA are present in 1 6 gm 02 2 NA 4 10 NA

66 Select ONE correct answer 3 01x1023 molecules of elemental Sulphur will react with 0 5 mole of oxygen gas completely to produce A 6 02 x 1023 molecules of SO C 3 01 x 1023 molecules of SO A SO3 C SO3 B 6 02 x 1023 molecules of SO D 3 01 x 1023 molecules of SO 3 01x1023 3 5 or four 6 02 10 3 3 01 10 3 B SO 6 02 x 10 3 D SO 3 01 x 10233

The IUPAC name of the coordination compo K3 Fe CN is 1 potassium hexacyanoferrate II 2 potassium hexacyanoferrate III 3 potassium hexacyanoiron II 4 tripotassium hexacyanoiron II