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CHEMISTRY QUESTION PAPER-1

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1) For an irreversible reaction A ----> 2B, the rate is increased by four times when the concentration of A is doubled. The incorrect statement about this reaction is:

1) It is a second order reaction.

2) Half life is independent of initial concentration of A. 

3) The unit of the specific rate, k is L mol-1 s-1

4) Half life is inversely related to the initial concentration of A.

SOLVED IIT JEE QUESTION PAPER

2) The expected major product formed in the following dehydration reaction is:

 dehydration of alcohol with conc. H2SO4

possible alkenes

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3) The correct order of ∠FMF bond angles (where M is the central atom) in NSF3, SiF4 and POF3 is:

1) NSF3 > SiF4 > POF3

2) SiF4 > NSF3 > POF3 

3) NSF3 > POF3 > SiF4

4) SiF4 > POF3 > NSF3

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4) The outer electronic configuration of metal, M in a diamagnetic complex with the formula, M(NH3)(EtNH2)BrCl is (n-1)d8. It does not give any  precipitate with silver nitrate. The correct statement about this complex among the following is:

1) Exhibits optical activity.

2) The metal, M undergoes sp3 hybridization.

3) Can show geometrical isomerism.

4) Its aqueous solution exhibits electrical conductivity.

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5) The correct radial probability distribution curve for the hydrogen atomic orbital with principal quantum number, n = 3 and azimuthal quantum number, l = 2 is: (4πr2ψ2 = radial probability density function and r = radial distance from the nucleus)

RADIAL PROBABILITY CURVES

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6) For the vaporization process of HI, the molar entropy and molar enthalpy are respectively, 89.0 J K-1 mol-1 and 21.16 kJ mol-1. The temperature at which the value of ΔG becomes zero for this process is: 

1) 237800 K 

2) 273.8 o

3) 35.2

4) -35.2 o

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7) The incorrect statement regarding the element Ununseptium is:

a) It belongs to group of halogens. 

b) It belongs to 7th period of periodic table:  

c) It is a radioactive element. 

d) It is a strong metal.

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8) titanium crystallises in an hcp model . calculate its density (given: a=b=295.3 pm and c= 473 pm)

a) It belongs to group of halogens. 

b) It belongs to 7th period of periodic table:  

c) It is a radioactive element. 

d) It is a strong metal.

SOLVED IIT JEE QUESTION PAPER

 

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