General Questions and Answers

Q 51 The specific rate constant of the 1 decomposition of N O5 is 0 008 min The volume of O collected after 20 minutes is 16 ml The volume that would be collected at the end of reaction NO formed is dissolved in CCI ml

The volume of air needed for complete combustion of 1 kg carbon at STP is 1 9333 3 litre 2 933 33 litre 3 93 33 litre 4 1866 67 litre

In concentration cell Fe Fe2 C Fe C Fe for spontaneous cell reaction C C AG 0 C C AG 0

Experimentally it was found that a metal oxide has formula Mo 980 Metal M is present as M and M in its oxide Fraction of metal 3 3 which exists as M is 1 4 08 3 5 08 2 6 05 4 7 01

Which of the following nuclear reactions will generate an isotope 1 Neutron particle emission 2 Positron emission 3 a particle emission 4 particle emission

Assuming complete ionization same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation Re AIPMT 2015 A FeC 04 B Fe NO2 2

7 What is the ratio of time periods T T in second orbit of hydrogen atom to third orbit of He ion 1 8 27 3 27 32 2 32 27 4 None of these

In view of the signs of A G for the following reactions PbO Pb2 Pb0 4G 0 SnO Sn 2 SnO 4 G 0 Which oxidation states are more characteristic for lead and tin 1 4 2 respectively 3 4 4 respectively 2 2 2 respective 4 2 4 respective

2 53 The energy released in joule and MeV in the following nuclear reaction 3 H H He n 1 0 3 2 Assume that the masses of H He and neutron n respectively are 2 0141 3 0160 and 1 0087 in amu is 10 3 J

Consider the following statements a Co NH3 5 NO Cl shows linkage isomerism b Co C 04 31 is an inner orbital complex c Cis CrCl ox 1 is chiral and optically active species The correct statements is are X a and b only b and c only a and c only a b and c

A mixture of NH3 g and N H g is placed in a sealed container at 300K The total pressure is 0 55 atm The container is heated to 1200K at which both gases decompose completely according to the equation 2NH3 g N g 3H g and N H4 9 N g 2H g After complete decomposition the total pressure at 1200K is found to be 5 5 atm Find the moles of N H4 in the original mixture A B C D O A B 30 25 40 75

76 3 4x10 6 mol lit 4 4x10 4 mol lit 1 7 3 4 xl yMnO zH O pl qMnO OH www 1x 10 4 Sto 01 The values of x y z p q r are respectively 1 3 2 1 4 8 6 2 2 6 4 3 2 8 3 6 2 4 3 2 8 4 4 2 6 2 38

Dinitrogen and dihydrogen react with each other to produce ammonia according to below reaction N 3H 2 NH3 If 2 103 g of dinitrogen reacts with 1 x 10 g of dihydrogen What is the mass of ammonia produced

Pre Medical Which of the following will not be present in last flask during the iodometric titration of Cu 2 3 B 8 B E colour less 30 1 starch A blue light bronze 2 Cu l2 3 dark bronze 3 12 D 4 Na S O3

Sir please explain how to use this table as there are mar questions which involve antilog in chemistry ANTILOGARITHMS TABLE II N 00 201 03 1072 1074 1076 O 1 2 3 4 5 1000 1002 1005 1007 1009 1012 1023 1026 1028 1030 1033 1035 02 1047 1050 1052 1054 1057 1059 1079 1081 1084 04 1096 1099 1102 1104 1107 1109 05 1122 1125 1127 1130 1132 1135 06 1148 1151 1153 1156 1159 1161 07 1175 1178 1180 1180 1183 1186 1189 1189 08 1202 1205 1208 1211 1213 1216 09 1230 1233 1236 1239 1242 1245 1153 10 1259 1262 1265 1268 1271 1274 511 1288 1291 1294 1297 1300 1309 12 1318 1321 1324 1327 1330 1334 13 1349 1352 1355 1358 1361 1365 14 1380 1384 1387 1300 1393 1396 15 1413 1416 1419 1422 1426 1429 16 1445 1449 1452 1455 1459 1462 17 1479 1483 1486 1489 1493 1496 18 1514 1517 1521 1524 1528 1531 19 1549 1552 1556 1560 1563 1567 20 1585 1589 1592 1596 1600 1603 21 1622 1626 1629 1633 1637 1641 22 1660 1663 1667 1671 1675 1679 23 1698 1702 1706 1710 1714 1718 24 1738 1742 1746 1750 1754 1758 1786 1791 1795 1799 1828 1832 1837 1841 1871 1875 1879 1879 1884 1914 1919 1923 1928 1959 1963 1968 1972 25 1778 1782 26 1820 1824 27 1862 1866 28 1905 1910 29 1950 1954 30 1995 2000 2004 2009 2014 2018 31 2042 2046 2051 2056 2061 2065 32 2089 2094 2099 2104 2109 2113 33 2138 2143 2148 2153 2158 2163 34 2188 2193 2198 2203 2208 2213 35 2239 2244 2249 2254 2259 2265 36 2291 2296 2301 2307 2312 2317 37 2344 2350 2356 2360 2566 2371 38 2399 2404 2410 2415 2421 2427 39 2455 2460 2466 2472 2477 2483 40 2512 2518 2523 2529 2535 2541 41 2570 2576 2582 2568 2594 2600 42 2630 2536 2542 2649 2655 2561 43 2592 2695 2754 2710 2716 2723 44 2754 2761 2767 2775 2780 2786 45 28182825 283 281 282 2844 2851 8 9 1 6 7 1014 1016 1019 1021 0 1038 1040 1042 1045 0 1062 1064 1067 1069 0 1086 1089 1001 1094 0 1112 1114 1117 1119 G 1138 1140 1143 1146 0 1164 1167 1169 1172 0 1191 1194 1197 1199 0 1219 1222 1225 1227 0 1247 1250 1253 1256 0 1607 1611 1614 1618 0 1644 1648 1652 1656 0 1683 1687 1690 1694 0 1722 1726 1730 1734 0 1762 1766 1770 1774 0 111 2 1 1 2 2 1276 1279 1282 1285 0 1 1306 1309 1312 1315 0 1 1337 1340 1343 1346 0 1 1 1 2 2 1368 1371 1374 1377 0 1 112 2 1400 1403 1406 1409 0 1 11 2 2 1432 1435 1439 1442 0 1 1 1 2 2 1466 1469 1472 1476 0 1 11 2 2 1500 1503 1507 1516 0 111 2 2 1535 1538 1542 1545 0 1 1 1 2 2 1570 1574 1578 1581 0 111 2 2 1803 1807 1811 1816 0 1845 1849 1854 1858 0 1888 1892 1897 1901 0 1932 1936 1941 1945 0 1977 1982 1988 1991 0 2 4 5 6 7 01 111 22 01 111 222 01 1 1 1 2 2 2 0 11 112 2 2 11 2 2 2 2 1111 2 2 2 2 1 1 1 1 2 2 22 1111 2 2 2 2 1 1 1 1 2 2 2 3 112 2 2 3 1 2 1 2547 2553 2559 2564 1 2806 2612 2618 2024 1 2667 2673 2679 2685 1 1 2729 2735 2742 2748 1 2793 2799 2805 2912 1 2858 2864 2871 2877 1 1 1 I 1 1 1 1 1 1 1 2023 2028 2032 2037 0 1 2070 2075 2080 2084 0 1 2118 2123 2128 2133 9 1 2168 2173 2178 2183 0 2218 2223 2228 2234 2270 2275 2280 2286 1 2323 2328 2333 2339 1 2377 2382 2388 2393 1 2432 2438 2443 2449 1 2489 2495 2500 2506 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 12 2 1 2 1 2 1 2 1 2 12 1 2 1 2 2 2 2 2 2 2 2 2 2 2 2 2 P 2 22 2 2 2 3 2 2 3 3 2 2 3 2 2 2 2 3 2 2 3 2 2 3 2 2 3 2 3 3 2 3 3 2 3 3 2 3 3 3 3 2 2 33 18 9 2 334 3 3 4 2 2 3 2 2 3 2 2 3 2 3 3 2 3 3 2 3 3 2 3 3 3 3 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 3 3 4 334 3 34 344 344 344 344 344 344 45 4 4 5 4 5 4 4 45 4 465 2 3 4 2 34 2 3 4 455 4 55 4 5 6 334450 456 556

3 When an inorganic compound X having 3c 2e as well as 2c 2e bonds reacts with ammonia gas at a certain termperature gives a compound Y isostructural with benzene Compound X with ammonia at a high temperature produces a substance Z 1 X is B H 3 Y is B N H6 2 Z is known as inorganic graphite 4 All of these

pices a Assertion and reason both are correct statements and reason is correct explanation for assertion b Assertion and reason both are correct statements but reason is not correct explanation for assertion c Assertion is correct statement but reason is wrong statement Assertion is wrong statement but reason is correct statement Assertion A Colloidal solutions show colligative properties Reason R Colloidal particles are large in size 1 OR Assertion A Colloidal solutions do not show brownian motion Reason R Brownian motion is responsible for stability of sols ii Assertion A Colloidal particles always carry an electric charge Reason R The sol particles acquire positive or negative charge by preferential adsorption of positive or negative ions iii Assertion A Colloidal solutions show Tyndall effect where the path of a beam of light is visible through the colloidal dispersion Reason R Colloidal particles scatter light in a straight line in the solution iv Assertion A The colour of colloidal solution is independent of the wavelength of light scattered by the dispersed particles Reason R The colour of colloidal solution changes with the manner in which the observer receives the light

Briefly but informatively discuss the functions of ion sources used in mass spectrometry Give examples of at least two sources that are used for gas chromatography mass spectrometry GC MS

If the atomic weight of carbon is set at 24 amu the value of the avogadro constant would be 1 6 022 x 1023 2 12 044 x 1023 3 3 011 x 1023 4 none of these

Boron has an extremely high melting point because of 1 The strong vander Waals forces between its atoms 2 The strong binding forces in the covalent 3 Its ionic crystal structure 4 Allotropy Thi

Solution of Assignment Set 44 What is the increase in entropy when 11 2 L of O are mixed with 11 2 L of H at STP 1 0 576 J K 2 5 76 J K 3 7 56 J K 4 2 76 J K

You have been asked to prepare buffer of PH 7 6using KOH and Ortho phosphoric acid Sum of concentrations of all phosphoric acid species is 0 10M What is the molar concentration of potassium ions in such buffer solutions PKa 4 3 PKa2 7 3 PKa3 10 6 log2 0 30

For which of the following ionic compounds AH is negative only due to lattice energ i NaF ii MgO iii Li 3N iv Na2S b Only iii iv d All of these a Only iv c Only ii iii iv

4 12 mg of ROH is added to Grignard reagent CH3Mgl If 1 56 ml of a gas is produced at STP the molar mass of alcohol will be nearly O 29 5 g mol 1 O 59 g mol 1 O 118 g mol 1 O224 g mol 1

50 ml of 0 6M acetic acid is shaken with 0 5g of activated charcoal The final concentration of solution after adsorption is 0 3M The amount of acetic acid adsorbed per gram charcoal is M wt of acetic acid is 60 1 0 45 g 2 3 6 g B 0 9 g 4 1 8 g

1 62 g of green algae absorbs 6 10 3 mol CO per hour by photosynthesis If the fixed C atoms are all stored after ph otosynthesis as starch C6 H10 05 ho w long will it take for the algae to doubl e their own weight Mw of C6 H10 05 n 162n The part of equation involved is 6nCO C6H1005 1 62gof C6H1005 Mol of CO absorbed 1 620f C6H1005 1 62 1 6n must be produced to double the weight per hour 1mol starch 6nmol CO 162ngstarch mol starch note the n is cancelled 162n 0 06mol CO Time required 0 06molC0 1 6 x 10 molCI 10h Please explain did you get Third Step 1 62 of C6H1005 n 1 mol starch 162

c the stress he bears during the travels d sweet memories of the past iii The poet is a person who is free from all inhibitions Discuss concept of freedom is expressed in the poem 95

C5 The interionic distances cation and anion are given below AB 3 67 DF 3 14 AC 3 44 EF 2 79 DC 3 29 EG 2 31 The radius of B ion is 2 19 2021 06 Choose the correct answer 1 The radius of G ion is 1 1 81 A 3 1 33 2 The radius of A ion is 1 1 33 3 1 96 2 1 96 4 0 98 2 1 48 4 1 54 8

This section contains 35 Sl questions Each question has 4 choices 1 2 Read More German silver contains O 60 70 Zn 15 20 Cu 15 20 Ni 30 40 Zn 20 25 Al 40 45 Cu O 40 50 Ni 25 30 Zn 25 30 Cu 25 30 Ni 25 30 Zn 40 50 Cu

31 The enthalpy of reaction is maximum in which of the following reaction exceptiona 1 NaOH HCl NaCl H O 2 NaOH HF NaF H O 3 NaOH HBr NaBr H O 4 All have same value AH a A

100 mL of PH when completely decomposed produces phosphorus and hydrogen The change in volume of the gas is PH g P s 3 H g 1 50 ml increase 3 900 ml decrease 2 500 ml decrease 4 Does not changes

0 1 M solution of KI reacts with excess of H SO4 and KIO3 solutions according to equation 51 IO3 6H 31 3H O Which of the following statements is incorrect a 200 mL of the KI solution reacts with 0 004 mole of KIO3 b 100 mL of the KI solution reacts with 0 006 mole of H SO4 c 0 5 litre of KI solution produce 0 05 mole of I d Equivalent weight of KIO3 is equal to Molecular weight 5

4 moles of a mixture of FeSO4 4 0 moles of a mixture of FeSO4 to FeC2O4 is completely oxidised by 1 mol of Ba MnO4 2 in the acidic medium What is the molar ratio of FeSO4 to FeC 04 in the given mixture A B 1 2 2 1

An unknown composition of mixture of CS H S was burnt in sufficient amount of 0 The resulting gases found to exert a pressure of 1 97 atm in a 20 lit vessel at 400 K The gaseous mixture required 2 8 M 12 solution and 250 ml of it was required to reach the end point forming I Mole fraction of CS in the original mixture is X Value of X

SolveLancer Test A student measures the volume of a solution The recordings came out to be 50 1 mL 50 2 mL 49 9 mL and 50 3 mL in the first second third and fourth trial respectively Identify the correct statement if the volume of the liquid is 50 0 mL SolveLancer Test a He has good precision b He has good accuracy c He has good accuracy and precision d He has neither accuracy nor precision

A lead battery recycling plant has decided to have an ion exchange column based wastewater treatment system to remediate Pb The average concentration of Pb in the effluent is 0 02 mol dm3 and the average flow rate is 28 L h I List four fundamental requirements of an ion exchange resin II For initial evaluations of the strong cation exchange resin the total static capacity needed to be evaluated theoretically The unit molar mass of the resin is 184 g mol What is the theoretical total static capacity of the resin for Pb ions in meq g units

d 39 Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations 2018 a 60 mL b 55 mL c 75 mL MR MR MS 100 mL HC1 40mL HC1 45 mL HC1 25 mL M 10 M 1 10 M 5 NaOH HCl 100 mL NaOH M d NaOH 10 pH of which one of them will be equal to 1 NaOH M 10

The vapour density of PCl5 is 104 25 but when heated to 230 C its vapour density is reduced to 62 The percentage of dissociation of PC15 at this temperature will be Question Type Single Correct Type 1 2 6 8 68

When 40 cc of slightly moist hydrogen chloride gas is mixed with 20 cc of ammonia gas the final volume of gas left at the same temperatura and pressure will be NH g HCl g 1 20 cc 3 60 cc NH CI s 2 40 cc 4 100 cc

A binary feed consisting of 25 mol liquid and 75 mol vapor is separated in a staged distillation column The mole fraction of the more volatile component in the distillate product is 0 95 The molar flow rate of distillate is 50 of the feed flow rate and McCabe Thiele method can be used to analyze the column The q line intersects the operating line of the enriching section at 0 35 0 5 on the x y diagram Calculate the slope of the stripping section operating line S na

The amino acid serine NH CH CH OH COOH has the following pk values pka1 2 19 pka1 9 21 What is are the major species at pH 2 19 Note in this context major species refers only to the species present in the highest concentration NH3CH CH OH COOH and NH CH CH OH COOH O NH3CH CH OH COOH only O NH CH CH OH COOH only O NH3CH CH OH COOH and NH3CH CH OH COO

ropane C3H8 can be burned to produce heat for homes The products of the reaction are CC nd H O For complete combustion to occur the ratio of the amounts of propane to oxygen mu e adjusted correctly Use the balanced equation C3H8 502 3CO2 4H O to answer the following questions 11 points i How many moles of CO are produced from 5 moles O 1 point

8 The radiation of low frequency will be emitted in which transition of hydrogen atom 1 n 1 to n 4 2 n 2 to n 5 3 n 3 to n 1 4n 5 to n 2 ENGVMODULE 112 ATOMIC STRUCTURE A 10 ATOMIC STRUCTUREV

ane C3H8 can be burned to produce heat for homes The of the reaction are nd H O For complete combustion to occur the ratio of the amounts of propane to oxygen m e adjusted correctly Use the balanced equation C3H8 50 3CO2 4H O to answer the following questions 11 points i How many moles of CO are produced from 5 moles O 1 point ii How many grams of CO are produced from 5 moles O 2 points

A piston cylinder assembly contains water that undergoes a series of processes Process 1 2 Constant volume heating from p1 5bar and T1 160 to P2 10bar Process 2 3 Constant pressure cooling to saturated vapor Process 3 4 Constant volume cooling to T4 160 C Process 4 5 Constant temperature expansion with Q 815 8 kl Sketch the processes on Pt Pv and Tv plots Lable the axes PRESSURE TEMPERATURE and SPECIFIC VOLUME values use clos to make clear the states numbers and process directions

Haemoglobin has 0 25 by mass of Iron Fe and cytochrome protein has 0 28 by mass of Iron Fe If a molecule of haemoglobin contains 4 atoms of iron and a molecule of cytochrome protein contains 1 atom of iron then the ratio of molecular mass of haemoglobin and cytochrome protein is Atomic mass Fe 56 A 1 12 B 2 24 C 4 48 D 8 96

25 3 g of sodium carbonate Na CO3 is dissolved in enough water to make 250 mL of solution If sodium carbonate dissociates completely molar concentration of sodium ion Na and carbonate ions CO2 are respectively Molar mass of Na CO3 106 g mol AIPMT Prelims 2010 1 0 955 M and 1 910 M 2 1 910 M and 0 955 M 3 1 90 M and 1 910 M 4 0 477 M and 0 477 M 4

What is the meaning of the line It can be extrapolated when concentration approaches zero in va riation of molar conductivity with concentration topic What is the word extrapolated means accor ding to this line What happens to molar conductivity

A colourless gas G produced on treating conc H SO4 with common salt is introduced into one end of a glass tube Through the other end another pungent smelling colourless gas G of molecular mass 17 is introduced A white sublimate S is produced inside the tube Which of the following statements is wrong Both the gas G and G are water soluble Sublimate S contains covalent bonds and ionic bonds Sublimate S when treated with caustic soda liberates G Aqueous solution of each G and G gas is acidic in nature

er hexacyanidoferrate III 3 If Avogadro Number NA is changed from 6 022 x 1023 mol 1 to 6 022 x 1020 mol 1 then no of atoms present in 11 20 L of a gas y 1 4 at STP would be 1 6 022 1023 3 6 022 1023 5 2 6 022 x 1020 4 6 022 1022 2