Physical Chemistry Questions

Which of the following is are correct A B C D At 75 C ionic product of water is more than 1 0 10 M At 25 C degree of dissociation of water is 1 8 10 7 At 75 C water is acidic p p 14 at all temperature

2 Calculate the work of system with isothermal compression where I mole of gas undergoes a pressure change from 1 bar to 58 bar at 130 C If gas follow equation of state PV Z 1 RT B 207 5 cm mol and C 18200 cm mol BP C B RT RT pa

25 Find the amount of alum KAI SO4 2 12H O separated out from 320 g KAI SO solution saturated at 20 C If 160 g of water is evaporated from the solution at 20 C Given that the solution saturated at 20 C contains 5 5 of KAl SO4 2 by mass Use molar mass K 39 Al 27 S 32 roli diand with Idn wnia tal if

Enthalpy of combustion of the reaction CH4 g O g CO g H O g is 890 kJ mol Calculate the how much heat is released when 25 0 g of methane is combusted A 1390 6 kJ B 1390 6 kJ C 890 kJ D 890 kJ

ven the standard electrode potentials K 2 93 V Ag Ag 0 80 V Hg Hg 0 79V Mg2 Mg 2 37 V Cr Cr 0 74V Arrange these metals in their increasing order of reducing ower OK Mg Cr Hg Ag O Ag Hg Cr Mg K O Ag Cr Hg Mg K OK Mg Hg Cr Ag

1 11 III IV P Q R S T U Which of the following is correct combination of List I and List II O 111 S O IV P OI U NaCl structure O11 Q ZnS structure CsCl structure CaF2 structure a Distance between two nearest cations 2 a Distance between two nearest cations 4 Distance between nearest cation and anion a 2 Distance between nearest cation and anion Distance between two nearest anions a 2 Distance between two nearest anions 3a 2 3a 2

Chern Section A This section contains 35 SINGLE CORRECT TYPE questions Each question has 4 choices 1 2 3 and 4 out Select the correct statement among the following KCI forms KCI 6 H O hydrate O Sr has higher hydration enthalpy than Mg O Sodium is the most abundant cations present within cell fluids O Beryllium does not impart any colour to the flame

30 90 Br AgCl Ag can be most easily coagulated by least concentration of O co O PO Mark for Review O Fe CN 6 4 01 2 hr m

Sol 1 Al O3 xH O Sol 2 CdS Sol Sol 3 TiO Sol Sol 4 Haemoglobin Consider the following statements S In electrophoresis the dispersed phase of only two of the given sols will move towards cathode S2 In electrophoresis the dispersion medium of only three of the given sols will move towards anode S3 Only three of given sols can be precipitated by K4 Fe CN 6 Which of the following options contain only the incorrect set of statement s Only S Only S and S3 Only S2 and S3 Only So

0 The correct structure of tribromooctaoxide is O O O O O O 11 O 4 11 11 1 O Br Br Br 0 2 O Br Br Br O 3 O Br Br Br O 4 O Br Br Br O TO O FO O 0 0 0 O 0 O O o 0

Number of Sigma bonds in Al CH3 and I C are Then the value of Your answer x y z 4 is x and y is the number of lone pairs on one I central atom in

Two liquids A and B are mixed at temperature T in a certain ratio to form an ideal solution It found that the partial pressure of A i e PA is equal to Ps the pressure of B for liquid mixture What is the total pressure of the liquid mixture in terms of P and P POP A AB P P 2P P P C B D 2P PR AB P P 2P B P P 4

1 Which of the following primary and secondary valencies are not correctly marked against the compound a Cr NH3 6 Cl3 p 3 s 6 b K PtCl4 p 2 s 4 c Pt NH3 Cl p 2 s 4 d Cu NH3 4 SO4 p 4 s 4

10 ml of a sample of H O2 solution liberates 112 ml of O2 gas at STP upon decomposition Identify the correct statement s A Normality of the above sample of H2O2 is 0 5 N Molarity of the above sample of H O2 is 1 M Milliequivalents of hypo required for the titration of liberated I when 10 ml of the same sample of H O2 solution is treated with excess of acidified solution of KI are 20 w v of given sample of H O2 is 3 4

In 14N if mass attributed to electrons were double the mass attributed to protons were halved th atomic mass would become approximately 1 Halved 2 Doubled 3 Reduced by 25 4 Remain same ASOO

Reaction 1 A Reaction 2 C D E 20 kJ Ea If the initial temperature is 400 K for both reaction and the rate constants are equal then find the ratio of Arrhenius factor A A for reaction 1 and 2 12 18 2 71 lowing B Ea 28 31 kJ 132

3 39 An equilibrium system for the reaction between hydrogen and iodine to give hydrogen iodide at 765K in a 5 litre volume contains 0 4 mole of hydrogen 0 4 mole of iodine and 2 4 moles of hydrogen iodide The equilibrium constant for the reaction is H 1 2HI is 2 15 0 1 march 1 36 0

3 For the azimuthal quantum number the to number of magnetic quantum number is given 1 2 3 4 m 1 2 m 1 2 2m 1 2 2m 1 2

At the end of the reaction 0 75 L of gas was collected over water at 25 C and the total pressure measured was 766 mm Hg How many moles of H O2 were consumed by the reaction Given vapor pressure of water at 25 C 24 mm Hg R 0 0821 atm L mole 1 atm 760 mm Hg OA O B Oc OD 766 760 0 75 0 0821 2 25 273 15 766 24 760 0 75 2 0 0821 25 273 15 766 24 760 0 75 2 34 0158 0 0821 25 273 15 34 0158 0 75 25 273 15 HO 34 0158 g mole

For the dec the rate law is given as di The order of the reaction when the pressure of NH inside the reaction vessel is very low will be Zeo 15 4 2 Inllowing species there is ou

The mass of potassium dichromate crystals required to oxidise 750 cm of 0 6 M Mohr s salt solution is Given molar mass potassium dichromate 294 Mohr s salt 392 AIEEE 2011 1 2 2 g 3 0 45 g 2 0 49 g 4 22 05 g

A beam of light is passed through three containers containing three different mixtures The beam of light rays is not visible in the first container it is brightly visible in the second container and in t he third container faint beam of light is visible Identify the type of mixtures in the three container s Justify your answer with reason s

Gem stone Bredig s Arc method is suitable for making which of the following sols Gold sols Mark Tor Review Basic dye 01 2 hr mi

der the llowing A g B s C g The following data is given for the decomposition of A into B and C at 300 K and the reaction follows first order kinetics Time min 205000 Vol of C mL 1025160 It is given that vapour pressure of B s is negligible In16 2 77 In15 2 70 Identify the correct statement Rate constant of the reaction is 0 0035 sec 1 Rate of formation of B and C will be equal Volume of C will be equal to volume of A at time 100 min Volume of C will never become equal to volume of A

A 20 0 mL solution containing 0 2 g impure H O reacts completely with 0 316 g of KMnO4 in acid solution The purity of H O in is mol wt of H O 34 mol wt of KMnO4 158 JEE Main 20201

59 180 Consider the following reaction Red hot H BO3 B A and B respectively are B H6 B O3 B O3 HBO HBO2 B O3 Mark for Review B O3 B H6

Potassium crystallizes in BCC lattice with cell length as a then which are correct stateme A Along one body diagonal effectively 1 25 atoms are present per unit cell B Along one face diagonal effectively 1 atoms is present per unit cell C If r is radius of atom then 4a 3r D Co ordination number of atoms in topmost layer is 8 For first order reaction

Bond enthalpies of H H Cl Cl and H Cl bonds are 434 kJ mol 242 kJ mol and 431 kJ mol respectively Enthalpy of formation of HCl is a 245 kJ mol b 93 kJmol c 245 kJ mol 1 d 93 kJ mol

5g of aluminium at mass 27amu is deposited at cathode from a solution by a certain quantity of electric charge The volume of hydroge produced at STP from ions in solution by the same quantity of electric charge will be O O O O 22 4 L 44 8 L 5 6 L 11 2 L

31 What is H in mol L of a solution that is 0 20 M 101 CH3COONa and 0 10 M in CH3COOH Ka for CH3COOH 1 8x10 5 AIPMT Prelims 2010 1 3 5 x 10 4 2 1 1 x 10 5 3 1 8 10 5IAT 4 9 0 x 10 6

It is clearly seen that B O of 02 B2 then how c is corr ect Please help me as soon as possible Please don t dela y to answer my question Choose correct option Ind a Phosphinic acid Phosphonic acid Phosphoric acid reducing property b Chloric acid Bromic acid Iodic acid CH HB ALO Acidic strength c C2 B2 02 Number of a bond BOL 1 1 5 d SO SO SO3 S O bond length 4 1 a b c d 3 b c d 2 a c d x 4 a d

24 Consider the following reaction at 25 C 2A B C where the initial concentration of A is 0 48 M Assuming that this reaction is second order in A calculate how long in seconds it would take for the concentration of A to reach 0 24 M if A is initially decomposing i e at t 0 at a rate of 4 0 x 10 mol L 5 1 1 2 x 10 2 2 1 2 x 10 3 1 4 x 10 5 4 1 6 x 10 6 C 2

k 10 In a reversible reaction A k of A and B area and b in moles per litre and the equilibrium concentrations are a x and b x respectively express x in terms of k k a and b 1 2 3 k a k b K k2 4 k a k b K K2 k a k b k k2 ka kab k k A pas X when dissolved B the initial concentration 10 3 heat evolved Then SIE GE a x entfer 1 2 3 k k k a k k a H k 8 4 k

A B C D Column I Process N N Li Li 0 0 B B Column II Change in Property P Magnetic moment Q Bond order R Magnetic Property S Number of anti bonding e T Number of bonding e

Total vapour pressure of mixture of 1 mole volatile component A PA 200 mm Hg and 3 mole of volatile component B P 160 mm of Hg is 180 mm of Hg such case There is positive deviation from Raoult s law O Force of attraction between A B is stronger than between A and A or B and B There is negative deviation from Raoult s law Enthalpy of mixing of these two liquids A B is negative

What is the value of carbonate hardness of water sample if 100 mL of it took 5 mL of 0 09 N HCI solution Molecular weight of Na2CO3 106 Answer Rate this questio

3 Consider the cell reaction A s 2B aq A aq 2B s E cell of the reaction 2A s 4B aq 2A aq 4B s is given E A 2 A XV and E B B yv 1 y x V 2 2 y x v 3 2 x y v 4 y x v

IV Gibbs free Energy of Galvanic cell 1 Question 1 The value of AG in Joule for electrode reaction A e A will be given E A 3 A X V and E A 2 A y V F Faraday s constant 1 3x 2y F 2 3x 2y F 3 3x 2y F 4 3x 2y F

Sir please solve According to the line of NCERT Q 80 CST 22 First Order Reaction 1 Which of the following reactions occur through first order kinetics 1 2NH3 g Pt N g 3H g A 2 H O2 3 CH3CHO H O 12 02 CH4 CO hy QUIOL 7 2

Cholesterol C27H460 is a waxy substance that acts to maintain membrane fluidity within the cells of your body by preventing fatty acids from crystallizing a What is the molar mass of cholesterol 3 pts b What is the percent by mass of carbon in cholesterol 3 pts c How many moles are present in 212 6 g of cholesterol 3 pts d How many moles of hydrogen atoms are present in 212 6 g of cholesterol 3 pts d A normal blood level of cholesterol for a healthy adult is 180 mg dL where 1 dL 10 L An average adult has 5 2 L of blood in their body How many molecules of cholesterol would be found in an adult with high cholesterol of 220 mg dL in their blood 5 pts

I have a ques when we talk about H2O it decomposes in to H ion and OH ion Why does 1 H loses it s 1 e and be comes ve while the other one still remains attached to O and acquires Ve charge What factors will determine it Please explain in simple language

View In English In an organic compound hydrogen is 2 9 times of C present and oxygen is 4 times of hydrogen present by mass The empirical formula of the compou is 1 2 3 4 C4H502 C3HgO3 C5H603 C3H802 V

49 The primary and secondary valences of the central atom of a schematic representation of given complex are respectively 1 6 6 H O H O 9 C plap OH 8 OH CI OH CI OH

An undisturbed 1200 cms sample of sand weighs 195 N when dry The void ratios at the maximumand minimum unit weights were determined to be 0 43 and 0 92 The specifnc gravity of solids is known to be 2 73 calculate wet and dry unit weight of sand in kN m 3 2 decimal pls thank you

H He and 0 ions having same kinetic energy pass through a region of space filled with uniform magnetic field B directed perpendicular to the velocity of ions The masses of the ions H He and 0 are respectively in the ratio 1 4 16 As a result estion Type Single Correct Type 1 2 3 He ions will be deflected least 0 ions will be deflected least He and 0 ions will undergo same deflection II

At a certain temperature K 1 8 litre2 mole 2 for N 3H 2NH3 How many moles of NH3 must be placed in one litre vessel in order to get 6 mole litre H at equilibrium 1 27 88 mole fa 31 88 mole 2 40 mole 4 80 mole

H g Pt s Anode Voltmeter K NO HCI Cathode Cl g By what value the cell valtage change when concentration of ions in anodic and cathodic compartments both increased by factor of 10 at 298 K A 0 0591 B 0 0591

A 2B C K 1 987x10 8 mole2litre 2 then at equilibrium the reaction mixture contains greater number of moles of 1 A 2 B 3 C 6 4 Equal moles of A and B

Consider the froth floatation process used to remove impurity from the ore dentify the incorrect statement It is based upon the differential wetting of the ore by oil and the impurity by water The function of adding oil is to reduce the surface tension of water O Impurity come up with froth and ore is settled down Aniline can be used as a froth stabilizer

The answer to each question is a NUMERIC TYPE which can be upto 2 decimal places Marking scheme o 4 If the correct numeric answer is typed in the provided space o 0 In all other cases k XZ If highest oxidantion state of Mn Cr and O is x y and z respectively then what would be the value of y