This document contains 27 chemistry problems from an unsolved 1996 IIT past paper. The problems cover a range of chemistry topics including gases, thermodynamics, kinetics, equilibrium, acids/bases, and nuclear chemistry. They involve identifying properties, relationships, and ordering compounds and reactions. The problems require calculation and reasoning skills to apply chemistry concepts.

1. IIT –Past papersCHEMISTRY- UNSOLVED PAPER - 1996

2. SECTION – ISingle Correct Answer Type

3. 01ProblemA mixture of ideal gases is cooled up to liquid helium temperature (4.22K) to from an ideal solution .Is this statement true of false? justify your answer in not more than two lines.

4. Problem02The wave number for the shortest wavelength transition in the Balmer series of atomic hydrogen is.27420 cm-128420 cm-129420 cm-112186 cm-1

5. Problem03The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at respectively. The value of the rate content as is,a.b.c. infinityd.

6. Problem04The ratio between the root mean square speed of at 50K and that of at 800 K is,4211/4

7. Problem05The orbital angular momentum of an electron in 2s orbital is:a.b. Zeroc.d.

8. Problem06In the following compounds,the order of acidityis:a.b.c.d.

9. Problem07In the Cannizzaro reaction given below, the slowest step isthe attack of at the carbonly groupthe transfer of hydride to the carbonyl groupthe abstraction of proton from the carboxylic acidthe deprotonation of

10. 08ProblemHydrolysis of one mole of peroxdisulphuric acid produces two moles of sulphuric acidtwo moles of peroxomonosulphuric acidone mole of sulphuric acid and one mole of peroxomonosulphuric acidone mole of sulphuric acid ,one mole of peroxomonosulphuric acid and one mole of hydrogen peroxide.

11. Problem09The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order.a.b.c.d.

12. Problem10Among the following species, identify the is structural pairsa.b.c.d.

13. Problem11The number and type of bonds between two carbon atoms in are:One sigma and one pi (π) bondsone sigma and two pi (π) bondsone sigma and one and a half pi (π) bondsone sigma bonds

14. 12ProblemWhich of the following statements is correct for ?It is a covalent compoundIt contains ionsIt contains ionsIt contains and lattice molecule

15. Problem13Arrange the following compounds in order of increasing dipole moment.Toluene (I) m-dichlorobenzene(II)0-dichlorobenzene (III) p-dichlorobenzene(IV)a.b.c.d.

16. Problem14KF combines with HF to form .The compound contains the species:a.b.c.d.

17. Problem15Which compound is formed when excess of KCN is added to an aqueous solution of copper sulphate?a.b.c.d.

18. Problem16Which compound does not dissolve in hot, dilute ?HgSPbSCuSCdS

19. 17ProblemSodium this ulphate is prepared by reducing solution with boiling solution with S in alkaline mediumneutralizing solution with boiling solution with S in acidic medium

20. Problem18A dilute aqueous solution of is electrolyzed using platinum electrodes. The products at the anode and cathode are:a.b.c.d.

21. Problem19 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical conditions is:10 seconds : He20 seconds : O225 seconds : CO55 seconds : CO2

22. Problem20One mole of at 300 K is kept in a closed container under one atmosphee. It is heated to 600 K when 20% by mass of decomposes to .The resultant pressure is:1.2 atm2.4 atm2.0 atm1.0 atm

23. Problem21When N2 goes to bond distance _________, and when O2 goes to ,the O-O bond distance ________ .

24. Problem22A ten-fold increase in pressure on the reaction , at equilibrium results in _____________ in

25. Problem23Which of the following halides is least stable and has doubtful existence ?a.b.c.d.

26. Problem24Which one of the following oxides is neutral ?a. b.c.d.

27. Problem25Which of the following has the maximum number of unpaired electrons?a.b.c.d.

28. Problem26The following acids have been arraanged in the order of decreasing acid strength.Identify the correct order.a.b.c.d.

29. Problem27 is a stable isotope. is expected to disintegrate by emission emissionPositron emissionproton emission

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