Chemical Bonding Questions and Answers

A B D of the following is incorrect Some times physisorption and chemisorptions occur simultaneously and it is difficult to ascertain the type of adsorption K When Mg OH is precipitated in presence of magneson reagent it gets blue colour due to adsorption on magneson Freundlich adsorption isotherm fails at high pressure In some cases a physical adsorption at low temperature may pass into chemisorptions as the temperature is increased

The characteristic of an ore is are A High of metal impurities C Low expenditure needed for the extraction D The elements which can be recovered on large scale from sea water are B Low amounts of easily removable All

AB crystal is formed when B ion occupies ccp arrangement while A ion occupies all the octahedral sites Total number of ions present in one unit cell when all ions along one of the body diagonal plane are removed will be 1 3 5 2 2 5 4 7 2

Kunal a class 10 student studied the reaction between marble chips and dilute HCI He took 50 g of marble chips and 100 mL of 0 1 molar HCI solution The given graph shows how the total mass PO Time min of marble chips varies with time as the reaction proceeds Which of the following statements are incorrect More and more CO gas is evolved along PQ CaCO remains unreacted after point P Reaction gets completed at point P Dilute HCI remains unreacted after point P B II and III only D II III and IV only I II III IV A C I and IV only I II and IV only Mass of CaCO

If A is more reactive than B then which of the following is true i A will replace B from a salt of B ii B will replace A fro m a salt of A iii Both can displace each other from their salts iv Both cannot di splace each other from their salts

ex combustion of octane C8H 8 in air 79 N 21 O 1 C H18 problems What is concentration of CO in exhaust How much CO released per year per typical car typical fuel data Poctane 703 g L MWoctane 114 g mol typical car data fuel economy 30 mpg 3 785 L gal 15 05

It is given that sigma 1s sigma 2s sigma 2pz are formed by the co axial overlap of 1s 2s and 2pz orbitals of the par ticipating atoms How can more than one orbitals overlap along the same in ter nuclear axis

The correct option s regarding the complex Co en NH3 3 H O En H NCH CH NH is are A B C F It has two geometrical isomers It will have three geometrical isomers if bidentate en is replaced by two cyanide ligands It is paramagnetic It absorbs light at longer wavelength as compared to Co en NH3 4

Consider following reactions 1 NaH H O 3 AgNO3 H O H3PO2 2 H S Cl water 4 NH4 2Cr2O7 s 6 XeF2 H O In how many of the reaction s at least one of the product is obtained in elemental state Question Type Integer Type 5 H S SO2 aq

Question 46 Assertion When hydrogen gas is passed over hot cupric oxide black colour of the compound changes to reddish brown Reason Cupric oxide is reduced to Copper For the above two statements given one labelled assertion and the other labelled reason Select the correct answer to these questions from the course a b c and d as given below a Both assertion and reason are true and reason is the correct explanation of the assertion b Both assertion and reason are true but reason is not the correct explanation of the assertion c Assert ion is true but reason is false d Assertion is falls but reason is true

1 Graph of InS vs is plotted for two gases A and B S represents solubility in molarity T is T in Kelvin Compare Henry s constant K for the two gases at same temperature 3 B A A KH A KH B C KH A KH B InSo 5 0 1 T B KH A KH B D KH A may be greater or less than KH B

308020103 Question No 30 40 Species A undergoes a unimolecular reaction as follows A A A A k 1 AP For this reaction the first order rate constant at high pressure is k The first 2000 order rate constant become ko 96 2 064 First order rate constant 476 2020 20200 020064696 202006465 A 2 The value of k will be AO K A kx 9 v y when pressure of A is A 1 PA 064696 2020064696 20 96 2020064696 2020064 20064696 2020 2521

ble can be prepared from K MnO as per the KMnO4 can be reaction 3MnO2 2H 0 2MnO4 MnO 40H The reaction can go to completion by removing OH ions by adding NEET 2013 1 KOH 3 SO 2 2 CO 4 HC

5 Which of the following statements is not correct for a nucleophile Re AIPMT 2015 1 Nucleophiles attack low e density sites 2 Nucleophiles are not electron seeking 3 Nucleophile is a Lewis acid 4 Ammonia is a nucleophile

0 When during electrolysis of a solution of AgNO3 9650 coulombs of charge pass through t electroplating bath the mass of silver deposited on the cathode will be 3 21 6 g 4 108 g 1 1 08 g 2 10 8 g

Heat of formation of isobutylene is Given heat of sublimation of carbon is 715 kJ mol and bond energy of H H C H C C C C is 431 410 336 and 606 kJ mo respectively 1 48 kJ 3 26 kJ 2 26 kJ 4 49 kJ

a 0 32 b 0 48 c 0 68 d 0 74 25 The fraction of volume occupied by atoms in a face centered cubic unit cell is a 0 32 b 0 48 c 0 68 d 0 74 26 Which of the following crystal lattice has the minimum empty space cell is

The correct increasing order of the acidity of CO2 H O and H O is 18 L 1 CO H O H O 2 HO H O CO 3 H O H O2 CO 4 H2O CO H O 14 C V S I

c negative deviation from Raoult s Law d that the solution is unsaturated Fluorine does not show variable oxidation state because a It is halogen c Absence of s orbital b Absence of d orbital d Absence of p orbital

ater boils at 100 C at 1 atmosphere pressure Heat of vaporisation of water is 10 Kcal mole in the given temperature range antilog 0 116 1 306 DVapour pressure of water at 40 C is 582 torr Vapour pressure of water at 40 C is 58 2 torr Lowering of vapour pressure of 0 2 molal solution at 40 C is 0 2095 torr Relative lowering of vapour pressure of 0 2 molal solution at 40 C is 0 0036

Which of the following statements are correct i Among halogens radius ratio between iodine and fluorine is maximum ii Leaving F F bond all halogens have weaker X X bond than X X bond in interhalogens iii Among interhalogen compounds maximum number of atoms are present in iodine fluoride iv Interhalogen compounds are more reactive than halogen compounds a i iii and iv are correct b iii and iv are correct b I and ii are corre d All are correct 4 6

38 8C At time t 0 initial mole of A is 1 3D Overall half life of the reaction is 15 days Then calculate the number of mole of C after 45 days if the ratio of k k kg is 4 2 1

Which of the following statements is incorrect A Ammonium salts on reaction with strong alkalies produce a non inflamable gas B fac Co NO3 3C13 is non chiral C Solid potassium dichromate and concentrated H SO4 liberates chlorine gas with solid sodium chloride D The increasing order of paramagnetic properties amongst VCI3 VOSO4 Na3VO4 V H O 6 SO4 H O is Na3VO4 VOSOA VCI IV H O ISO H O

Consider the following first order competing reaction A B and Y C Dif 50 of the reaction of X was completed when 96 of the reaction of Y was completed the ratio of their rate constants k k is Options 1 4 06 2 0 215

The ratio of the rate constant of a reaction at any temperature T to the rate constant T is equal to Options 1 Energy of activation of the reaction 2 Fraction of molecules in the activated state 3 Average life of the reaction 4 Pre exponential factor in the Arrhenius equation

Acetic acid is obtained when 1 glycerol is heated with sulphuric acid 2 methyl alcohol is oxidized with potassium permanganate 3 acetaldehyde is oxidized with potassium dichromate and sulphuric acid 4 calcium acetate is distilled in presence of calcium formate

6 How much time in hours is required to plate out 25 0 g of gold metal from a solution of Au NO3 3 when the current is 2 00 amperes and the electrode efficiency is only 65 1 9 36 hr 2 2 88 hr

You have a stock solution called 2X Sample Buffer You have 50 l of protein sample Your protocol asks you to add enough of you 2X Sample Buffer to your 50 l of protein sample to dilute the 2X Sample Buffer by 2 What do you do Add 100 l of 2X Sample Buffer to your 50 l of protein sample Add 150 l of 2X Sample Buffer to your 50 l of protein sample Add 50 l of 2X Sample Buffer to your 50 l of protein sample Add 10 l of 2X Sample Buffer to your 50 l of protein sample Add 5 l of 2X Sample Buffer to your 50 l of protein sample

As an acid 0 1000 M KH IO3 2 solution is equal to 0 1000 N What is its normality as am Oxidizing agent when it is transformed to l A B C 1 000 N as an oxidizing agent 0 5000 N as an oxidizing agent 0 2000 N as an oxidizing agent

In general maximum difference in electronegativities is observed when we move A from second to third period B from third to fourth period C from fourth to fifth period D from fifth to sixth period

he equilibrium constant K for the following reaction at 700 K is 5 x 108 C H g Br g 2HBr og 1261 noiose1 If a mixture of 0 8 mol of H 0 3 mol of Br and 0 1 mole of HBr is heated at 700 K The amount of HBr at equilibrium is 1 0 2 mol 3 0 5 mol 2 0 3 mol Patron 4 4 0 7 mol 0 7 mol stinu of

Q 26 What is the product of the following reaction and which catalyst is used in the given reaction 2SO2 g O2 g 196 6K mol Max score 1 Neg score 0 SO3 V205 S202 ZnO SO CuBr2 4H

49 The correct order of increasing bond angles in the following triatomic species is a NO NO NO b NO NO NO c NO NO NO d NO NO NO 2008 5

A solution of A is made to React with chlori ne water in the presence of carbon tetrachlo ride On shaking the carbon tetrachloride lay er is found to be orange in colour Identify c ompound A Write the chemical equation for the reaction Also name the type of chemica I reaction

12 Ammong the following incorrect statement 1 NO has one unpaired electron in the antibonding molecular orbital 2 NO NO order of bond length 3 Magnetic moment of N is 3 BM 4 Magnetic moment of O is zero 9 2 112 3t 1 NO farfar se 4 T 2 NO NO 3 BM 4

pair both the species b NF3 H O d H S BF3 Karnataka NEET 2013 29 which of the following ionization processes 28 An which of the following have sp hybridization a SiF4 BeH c NF3 BF3

A 20 L container at high temperature contains CO at pressure 0 4 atm and an excess of CaO s The volume of the container is now decreased by moving the movable piston fitted in the container The maximum value of volume of the container when pressure of CO attains its maximum value is found to be 4 L Kp of following equilibrium is CaCO3 s CaO s CO g A B C D 5 atm 10 atm 4 atm 2 atm

Suppose you are given two oleum samples Sample A contains equimolar mixture of its components while sample B contains equimass mixture of its components Which of the two samples will have greater strength Sample A Sample B Both have same strength Nothing can be predicted until numerical data is given

Explain the following i Gallium has higher ionization enthalpy than aluminium ii Boron does not exist as B ion iii Aluminium forms AlF ion but boron does not form BF ion

Amongst the following the pair having both the metals in their highest oxidation state is A B Fe CN 6 and Co CN 6 CrO Cl and MnO C TiO3 and MnO D MnCh and NiF6 2

Consider the statements and select the incorrect one Bromine oxides BrO and BrO3 exist only at low temperature lodine oxides 1205 and 1207 are insoluble solids and decompose on heating The stability of oxides formed by I Cl and Br follow the order I Br Cl The higher oxides of halogens are more stable than the lower ones

Ilts IN d n 4 c n 4 1 0 m 1 m 2 164 The subshell that arises after f is called the subshell How many electrons may occupy the g subshell a 9 b 7 c 5 d 18 65 Which of the following electron configurations is correct for iron atomic number 26

Depending on the vapour pressures of pure components 1 and 2 total vapour pressure over the solution decreases or increases with increase in the mole fraction of component 1 I have two questions 1 why total vapour pressure over the solution can decrease as well as increase by only increase in the x1 no clear direct or inverse relationship between total vapour pressure and x1 why only x1 is chosen not x2 estion asked by Navya Student at 24 Aug 2021 08 18 41

Choose the correct order of the following O Na g Mg g Al g lonic radius Mg aq Sr aq Ba aq Hydrated radius order Mg aq Sr aq Ba aq lonic mobility order

3 1 Pz 3 02pz The bond order of N is same as that of NCERT Pg 129 1 N 3 02 2 N2 4 0 3 m n 20 Minimu 1 02 3 Oz

Which among the following factors is the most important in making fluorine the strongest oxidizing halogen 2 Ionization enthalpy 4 Bond dissociation energy 1 Hydration enthalpy 3 Electron affinity

11 2 ml of methane gas is produced at STP by the action of 41 2 mg of alcohol ROH with methyl magnesium iodide CH3Mgl The molecular mass of alcohol is Options 1 16 0 2 41 2 3 84 2

Consider the following reaction xMnO4 yC 0 zH Z xMn 2yCO H O The values of x y and z in the reaction are respectively JEE Main 2013 1 5 2 and 16 3 2 5 and 16 2 2 5 and 8 4 5 2 and 8

9 How many moles of oxygen gas will be evolved when 24 5 g of KCIO is heated for complete decomposition Molar mass of KCIO 122 5 g KCIO 1 0 1 2 0 2 3 0 3 3 A AKCI 0 2

KINDLY EXPLAIN HOW TO SOLVE THIS QUE IN SHORT SP N Decreasing order of bond length of given molecules C O N O C C C N is 1 C C N O C O C N 2 C C C O N 0 C N 3 C N C C N O C O 4 C C C N N O C O