Chemical Bonding Questions and Answers

1 dox NEET VOL 11 In the reaction K O KO 1 O acts as an oxidising agent 2 Both K and O are oxidised 2 3 O is oxidised with K is reduced 4 K acts as an oxidising agent 12 Cr O X Cr H O oxidised product of X X in the above reaction cannot be 2 1 C O 2 Fe 3 SO 4 S

The IUPAC name of the compound ur is 1 3 Keto 2 methylhex 4 enal 3 5 Methyl 4 oxohex 2 en 5 al Statement 1 For adsorption AG AH AS all have negative values 2 5 Formylhex 2 en 3 one 4 3 Keto 2 methylhex 5 enal

Choose the incorrect option regarding following complex is K Pt Cl cl x O z x Bond length Odsp hybridisation O O S of Pt 2 O C C bond length in this complex is less than individual CH CH CH CH M

What is the dominant intermolecular force or bon that must be overcome in converting liquid CH O to a gas 1 London dispersion force 2 Hydrogen bonding 3 Dipole dipole interaction 4 Convalent bonds

A B 3 and the percentage error in the measurements of A B C and D are 4 2 3 and 1 respectively CD3 2 Example 12 Find the relative error in Z if Z

lodide Bromide Chloride Fluoride

Choose incorrect statement regarding alkaline earth metal compounds Solubility of hydroxides increases down the group Solubility of carbonates decreases down the group Tendency of nitrates to form hydrates increases down the group Tendency of halides to form hydrates decreases down the group

The dissociation constants for acetic acid and HCN at 25 C are 1 5 x 10 5 and 4 5 x 10 10 respectively The equilibrium constant for the equilibrium CN CH3COOHHCN CH3COO would be A 3 0 x 105 B 3 0 X 10 5

ALLEN is a un CAREER INSTITUTE KOTA RAJASTHAN IV XeO 4 D I II III In which of the following species presence of double bond does NOT affect idealised bond angle re 1 POCI III XeO F C III IV only II XeO F B I II only fa

A standard hydrogen electrode has zero electrode potential because 1 Hydrogen is easiest to oxidize 2 This electrode potential is assumed to be zero 3 Hydrogen atom has only one electron 4 Hydrogen is the lightest element

3 a chloroacetaldehyde is more reactive than acetaldehyde because a chlorine atom has I effect and decreases ve character of carbony carbon b chirioncatom has I effect and decreases ve charactor of carbony carbon c Methyl group has 1 effect and increases ve charactor of carbony carbon d chiorine atom has I effect and increses ve character of crbonyl carbon

49 For the synthesis of ammonia from its elements 3H g N g 2NH g the equilibrium constant K 6x 10 at 300 K and AH 24 kCal mol Calculate equilibrium constant at 600K assuming no change in AH between 300 K and 600K Given e 20 2 10 isted in the table are forward and reverse rate constants for the reaction 2NO g N g 0 g k M s k M s 1 1 x 10 6

C Change of medium from acidic to D Change in medium from acidic to basic will change the nature of product A sample of steel weighing 0 30 g was subjected to a chemical reaction to convert its sulphur impurity to H S g The evolved gas required 2 40 mL 0 02 N iodine solution Which of the following statement s is are true A B C A lodine is reduced to iodide B H S is oxidized to S C Steel contain 0 256 of S by weight D The reaction of H S with I is a precipitation reaction rather than a redox reaction TCH THE COLUMN

8 What is the mole fraction of the solute in a 1 00 m aqueous solution CBSE AIPMT 2015 a 0 177 b 1 770 c 0 0354 d 0 0177

electrons In which of the following pairs the radii of second species is greater than that of first 1 K Ca 2 H He 3 Mg Mg2 4 0 0

a 95 c 75 d 65 Al2 SO4 3 solution of 1 molal concentration is present in 1 litre solution of density 2 684 s cc How many moles of BaSO 4 would be precipitated on adding excess of BaCl2 in it b 3 moles a 2 moles c 6 moles 5 A certain public water supply contains 0 10 ppb part per billion of chloroform CHCI 3 How d 12 moles selecules of CHCl would be obtained in 0 478 ml drop of this water

Oxalic acid H C O4 reacts with permanganate ion according to the balanced equation below How many mL 0 0154 KMnO4 solution to react 25 0 mL of 0 0208 M H C 04 solution 5H C O4 aq 2MnO4 6H aq a 13 5 mL c 33 8 mL 2Mn aq 10CO g 8H O 1 b 18 5 mL d 84 4 mL

1 An alkene obtained by the dehydration of an alcohol 4 on ozonolysis gives molecules of acetaldehyde for every molecule of alkene The alcohol 4 is a CH3CH CH OH c CH3CH CHCH OH b CH3CH OH d CH3CH CHCH3

The elements whose atoms have three outer most shells incomplete are called 1 s block elements 2 p block elements 3 f block elements 4 d block elements

Which pair of elements has the same characteristic chemical properties 1 Z 13 Z 22 2 Z 3 Z 11 3 Z 4 Z 24 Z 2 Z 4 4 4

Three moles of an ideal gas are taken through a cyclic process ABCA as shown on T V diagram in the figure The gas loses 2510 J of heat in the complete cycle If TA 100 K and TB 200 K The work done by the gas during the process BC is R 8 3 J mol K Tel Te TA 1 VA Vc O 5000 J O 5000J O 4000 J VB

General molecular formula of carbonyl compounds is 1 C H O 3 C H O 2 C H2n 2O 4 C H2n 2O

The oxidation potential of Zn Cu Ag H and Ni are 0 76 0 34 0 80 0 0 55 volt respectively Which of the following reaction will provide maximum voltage 1 Zn Cu Cu Zn 2 Zn 2Ag 3 H Cu 4 H Ni 2 2Ag Zn 2H Cu 2H Ni

51 Which one of the following is expected to exhibit optical isomerism en ethylenediamine a cis Pt NH3 2Cl b trans Pt NH3 2Cl Le cis Co en Cl d trans Co en Cl 2005

9 Formal charge on central oxygen atom in O3 is 1 Zero 2 1 3 1

1 Which complex compound will give four isomers a Fe en 3 Cl3 b Co en Cl Cl c Fe PPh3 3NH ClBr Cl d Co PPh3 3Cl Cl3 2000

At 300 K and 1 atm 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20 O by volume for complete combustion After combustion the gases occupy 330 mL Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure the formula of the hydrocarbon is Main 2016 Offline 4 C H10 1 C H 2 C H JEE 3 C Hg

ch Q 36 A solid PQ has rock salt type st toms are at the corners of the unit cell If the body centred toms in all the unit cells are missing The resulting 11

acceleration of electron in 1st orbit of He is acceleration of electron 2rd orbit of Be is B 20 C 1 5 D i 4

If force of attraction between the electron and nucleus in 2nd orbit of Li isf force of attraction if electron present in 1 orbit of His A f B 12 f C f 81 D 16 f 27

Which among the following will be named as dibromidobis ethylene diamine chromium III bromide 1 Cr en Br Br 3 Cr en Br Br 2 Cr en Br 4 Cr en Bra

Which of the following will give maximum number of isomers 1 Copy NH g 3 3 Fe C O en 1 2 Nien NH 4 Cr NO NH

The effective atomic number of Cr atomic no 24 in Cr NH 1 35 Cl is 2 27 3 3 33 4 36

5 How many unpaired electrons are present in the Brown Ring complex Fe H O NO SO4 1 4 3 0 2 3 4 5

The number and type of bonds between tw boron atoms in B molecule 1 Two sigma two pi 2 Two sigma one pi 3 One Pi

Amongest the following highest paramagnetism 1 Cr H O 1 3 Cu H O 1 ions which one has the 2 Fe H O 4 Zn H O

Which of the following is considered to be an anti cancer species H N X Pf CI 1 3 CL CI Pt CI NH CI CI 2 CI 4 P CH TI CH CI H N X Pt H N

Which gives only 25 mole of AgCl when reacts with AgNO3 1 PtCl 4NH 3 PtCl 4NH3 2 PtCl 5NH3 4 PtCl 3NH 4

The EAN of cobalt in the complex ion Co en Cl is 1 27 2 36 3 33 4 35

The two compounds sulphato penta ammine cobil III bromide and sulphato penta ammine cobali III chloride represent 1 Linkage isomerism 2 Ionisation isomerism 3 Co ordination isomerism 4 No isomerism

The charge present on 42 g of nitride ions coulomb is 1 4 8 10 19 3 2 86 105 2 14 4 10 19 4 8 6 105

4 In an octahedral structure the pair of d orbitals involved in sp of hybridisation is 1 d x y dz 2 dxz d2 3 d dxz 4 dxy dyz smpia sot to600 Samole

Which of the following electron transitions in a hydrogen atom will require the largest amount of energy 1 from n 1 to n 2 2 from n 2 to n 4 3 from n 5 to n 1 4 from n 3 to n 5

The values of electronegativity of atoms A and B are 1 2 and 4 0 respectively The ionic character of the A B bond is DPMT 2009 b 72 24 d 4 3 a 50 c 55 3

Arrange the following molecules in the increasing order of their ionic character 2 Points LiF K O N SO2 Cu LiF K 0 N SO CIF3 N K 0 LiF SO CIF3 N K 0 LiF CIF3 SO

f we have 10 molal urea solution Calculate mole fraction of urea in this solution also calculate o w w of urea MW 60 O moles urea in 1000 g of water

C sp 2 C2 sp sp sp C3 sp 3 sp a H H C C H C3 Acrylonitrile C Z

d Many important compounds in the chemical industry are derivatives of ethylene C2H4 One is methyl methacrylate What are the indicated bond angles in methy methacrylate angle d angle e angle f H Methyl methacrylate 90 109 50 120 1800

3 C O F CI NO CN 1 The overall formation constant of the Co NH 2 ion in aqueous solution is 105 and the standa potentials for the reduction of Co aq and Co NH 1 aq are as follows Co aq eCo aq E 1 9V Co NH3 aq e Co NH3 aq E 0 1V Calculate the nearest overall formation constant of the Co NH3 ion www 1 1030 2 1033 3 1035 4 1038 iment corresponding

We know the reaction between Zinc and sul phuric acid and as a product it releases the H2 gas Now if we take some amount of so dium hydroxide in place of sulphuric acid an d react it with zinc what will be the change i n amount of hydrogen gas produced a Same amount of H2 gas is evolved b H2 gas is not evolved c The amount of H2 gas evolved is much I ess d In place of H2 gas 02 gas is evolved