Indian Institute of Technology Mumbai (IIT-M) 2006 Entrance Exams IIT Entrance Exams IIT Chemistry - Question Paper

(1) statement – one is true, statement -2 is actual , statement -2 is a accurate explanation for statement -1

(2) statement - one is true, statement -2 is actual , statement -2 is not accurate explanation for statement -1

(3) statement - one is actual , statement -2 is false

(4) statement - one is false , statement-2 is actual



2 STATEMENT-1: H3PO4 only 2 H-atoms are replaceable

Because

STATEMENT-2: Equivalent mass is equal to product of molecular mass and change in oxidation number.

(1) Statement – one is true, statement -2 is true, and statement two is a accurate explanation for statement 1

(2) Statement - one is true, statement -2 is true, statement -2 is not accurate explanation for statement -1

(3) statement - one is true, statement -2 is false

(4) statement - one is false, statement-2 is actual



3 STATEMENT-1: 18gm of water vapour and 18gm of ice will not contain the identical number of molecules


Because



STATEMENT-2: Number of molecules is temperature and pressure



(1) statement – one is true, statement -2 is true, statement -2 is a accurate explanation for statement -1

(2) statement - one is true, statement -2 is true, statement -2 is not accurate explanation for statement -1

(3) statement - one is true, statement -2 is false

(4) statement - one is false, statement-2 is actual



4 STATEMENT-1: atomic mass of mg
is 24

Because

STATEMENT-2: an atom of mg is 24 times heavier than 1/12th of the mass of carbon atom (C12)



(1) statement – one is true, statement -2 is true, statement -2 is a accurate explanation for statement -1

(2) statement - one is true, statement -2 is true, statement -2 is not accurate explanation for statement -1

(3) statement - one is actual , statement -2 is false

(4) statement - one is false, statement-2 is actual

5 STATEMENT-1: The oxidation number chromium in CrO5 is + six



Because



STATEMENT-2: All the Oxygen current in CrO5 is in the form of Oxide



(1) statement – one is true, statement -2 is true, and statement two is a accurate explanation for statement 1

(2) statement - one is true, statement -2 is true, statement -2 is not accurate explanation for statement -1

(3) statement - one is true, statement -2 is false

(4) statement - one is false, statement-2 is actual



6 STATEMENT-1: For the reaction Cu2S------->Cu2+ +SO2 Y moles of Cu2S is equal to 8y equivalent of Cu2S

Because

STATEMENT-2: since the N factor of Cu2S is eight and number of equivalents = mole x n factor

(1) statement – one is true, statement -2 is true, statement -2 is a accurate explanation for statement -1

(2) statement - one is true, statement -2 is true, statement -2 is not accurate explanation for statement -1

(3) statement - one is true, statement -2 is false

(4) statement - one is false, statement-2 is actual

7 STATEMENT-1: for the reaction NoaH + H2CO3-------> NaHCO3 + H2O equivalent weight of
H2CO3 is 62

Because

STATEMENT-2: n factor of H2CO3 is one and equivalent mass = molecular mass/n factor

(1) statement – one is true, statement -2 is actual , statement -2 is a accurate explanation for statement -1

(2) statement - one is true, statement -2 is actual , statement -2 is not accurate explanation for statement -1

(3) statement - one is actual , statement -2 is false

(4) statement - one is false , statement-2 is actual

Match the Matrix (this is identical like match the subsequent but one ques. can have more than one choice correct)

1 Match the subsequent



column -1 column- 2



a number of carbon atoms in 1g molecule of CO2 (1) 0.5 N0



b Number of Molecules in 48 g O2 (2) N0



c No. of molecules In 11.2 / H2 at STP (3) three N0



d No. of atoms in one moles of NH3 (4) 0.5 N0

(N0 = Avogadro’s Number)

2 Match the subsequent



column -1 column- 2(n-factor)



a KMnO4 in acidic medium (1) 10



b Ba(MnO4)2 in acidic medium (2) 6



c S2O32- in alkaline medium (3) five



d K2Cr2O7 in acidic medium (4) eight


3 Match the subsequent



column -1 column- 2(n-factor for reactant)



a Cu2S is converted into Cu2+ & SO2 (1) 11



b FeC2O4 is converted into Fe3+ & CO2 (2) four



c CuS is converted into Cu & SO2 (3) eight



d Fes2 is converted into Fe3+ & SO2 (4) three



Numericals in Mole Concept

Compound X contains 0.25% iron by mass. The molecular mass of X is 89600. compute the number of iron atoms per molecule of X.

150 mL of N/10 HCl is needed to react completely with 1.0g of a sample of limestone. compute the percentage purity of calcium carbonate.

A bulb of unknown quantity V contains an ideal gas at one atm pressure. This bulb was connected to a different evacuated bulb of quantity 0.5 L through a stopcock. When stopcock was opened the pressure at every bulb becomes 530 mm of Hg while the temperature remained constant. obtain V in litres.

A jar contains a gas and a few drops of water. The pressure in the jar is 830 mm of Hg. The temperature of the jar is decreased by 1%. The vapor pressure of water at 2 temperatures are 30 and 25 mm of Hg. compute the new pressure in jar.

When a certain volume of ozone was ozonised in suitable apparatus, the quantity reduces by 4mL.On addition of turpentine oil, the quantity reduces further by eight mL. obtain the formula of ozone, assuming all measurements are made at identical temperature and pressure.

Two flask of equal quantity connected by narrow tube ( of negligible volume) are at 27oC and contains 0.7 moles of H2 at 0.5 atm. 1 of the flask is then immersed in a bath kept at 127oC, while the other remains at 27oC. compute the final pressure and the number of moles of H2 in every flask.

Earning:   Approval pending.