JEE Chemistry paper for practice

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JEE Chemistry paper set 1

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The relative strength of interionic/ intermolecular forces in decreasing order is:

1 ion-dipole > dipole-dipole > ion-ion

2 dipole-dipole > ion-dipole > ion-ion

3 ion-ion > ion-dipole > dipole-dipole

4 ion-dipole > ion-ion > dipole-dipole

Oxidation number of potassium in K2O, K2O2 and KO2, respectively, is :

1 +2, +1 and +12

2 +1, +2 and +4

3 +1, +1 and +1

4 +1, +4 and +2

At 350C, the vapour pressure of CS2 is 512 mm Hg and that of acetone is 344 mm Hg. A solution of CS2 in acetone has a total vapour pressure of 600 mm Hg. The false statement amongst the following is :

1 CS2 and acetone are less attracted to each other than to themselves

2 heat must be absorbed in order to produce the solution at 350C

3 Raoult’s law is not obeyed by this system

4 a mixture of 100 mL CS2 and 100 mL acetone has a volume < 200 mL

The atomic radius of Ag is closest to :

1 Ni

2 Cu

3 Au

4 Hg

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is :

1 less efficient as it exchanges only anions

2 more efficient as it can exchanges only cations

3 less efficient as the resins cannot be regenerated

4 more efficient as it can exchange both cations as well as anions

Amongst the following statements, that which was not proposed by Dalton was :

1 matter consists of indivisible atoms

2 when gases combine or reproduced in a chemical reaction they do so in a simple ratio by volume provided all gases are at the same T & P

3 Chemical reactions involve reorganisation of atoms. These are neither created nor destroyed in a chemical reaction.

4 all the atoms of a given element have identical properties including identical mass. Atoms of different elements differ in mass.

The increasing order of pK_b for the following compounds will be :

1 ii < iii < i

2 iii < i < ii

3 i < ii < iii

4 ii < i < iii

The number of orbitals associated with quantum number n=5, ms=+½ is :

1 11

2 15

3 25

4 50

The purest form of commercial iron is:

1 cast iron

2 wrought iron

3 scrap iron and pig iron

4 pig iron

The theory that can completely/ properly explain the nature of bonding in [Ni(CO)4] is:

1 Werner’s theory

2 Crystal Field Theory

3 Molecular Orbital Theory

4 Valence Bond Theory

The IUPAC name of the complex [Pt(NH3)2Cl(NH2CH3)]Cl is :

1 Diamminechlorido(methanamine)platinum(II)chloride

2 Bisammine(methanamine)chloridoplatinum(II) chloride

3 Diammine(methanamine)chloridoplatinum(II)chloride

4 Diamminechlorido(aminomethane)platinum(II)chloride

1-methyl ethylene oxide when treated with an excess of HBr produces:

Consider the following reaction:
The product ‘X’ is used:

1 in protein estimation as an alternative to ninhydrin

2 as food grade colourant

3 in laboratory test for phenols

4 in acid-base titration as an indicator