Question # 1

d2 sp3 is oriented in a manner

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Trigonal

Tetrahedral

Octahedral

Trigonal bipyramidal

How pig iron is usually obtained from

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iron pyrite

Limonite

Hematite

Siderite

Which among the following is least soluble in water.

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NaF

LiF

KF

CsF

Which of the following trihalides of nitrogen behaves as the weakest base.

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NF3

NCl3

NBr3

NI3

Which of the following statements is wrong.

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Covenant compounds are generally soluble is polar solvents.

Covalent compounds have low melting and boiling points

Lower than that of separate H atoms

Sometimes lower and sometimes higher than that of separate H

Which among the following is a Talse statement.

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SO3 is obtained by the catalytic oxidation of SO2

SO3 has trigonal planar geometry in gaseous state

SO3 in nauseous state has all S-O bonds equivalent

SO3 gas shows more solubility in water than in H2SO4

Which of the following metals form volatile carboyl with CO below 80^oC

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Cu

Fe

CO

Ni

According to the VSEPR theory, the shape of the SO3 molecule is.

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Pyramidal

Tetrahedral

Trigonal planar

Distorted totrahedron

Example of linear geometry

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XeF2

F2 and HgCl2

CdI2 AND Ag Cl3

All of the above

Consider to violet colored compund.[Cr(OH)2)6 Cl3 and the yellow compound. [Cr(NH3)6]C;2 which of the following statements is false.

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Both chromium metal ions are paramagnetic with 3 unpaired electrons.

[Cr(NH3)6)3+ is calculated directly form the energy of yellow light

For [Cr(OH)2)6]3+ is less than for [Cr(NH3)6]3+

The two complexes absorb their complementary colors.

The geometry of the molecule is primarily decided by

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Bond pairs around the central atom

No of k bond around the central atom

No of bond pairs as well as lone pairs around the central atom

No. of lone pairs on central atom

The element having highest ionization energy and least electron affinity belong to

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Period 1 , group 18

Period 2, group 17

Period 2, group 1

Period 2, group 2

Concentrated aqueous sodium hydroxide can separate a mixture of.

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Al3+ and Sn2+

Al3+ and Fe3+

Al3+ and Zn2+

Zn2+ and Pb2+

Group III A of the periodic table consist of elemetns.

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3

4

5

6

Boron and aluminum halides are electron deficient compounds in this respect. they act as.

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Lewis acid

Lewis base

Oxidizing agent

Reducing agent

Which process of adsorption of hydrogen on palladium is known as.

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Syneresis

Occlusion

Diffusion

Erosion

Compounds formed when noble gasses get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called.

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Interstitial compounds

Hydrates

Clathrates

Picrates

The matrix is usually in the form of.

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Sand

Limestone

Rocks

All

H-Bond has more energy than the van der Waals forces i.e.

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1.0 kcal/mole

2.0 k cal/mole

10.0 kcal/mole

20. 0 kcal mole

Nitric acid is used in the manufacturing of.

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Dyes

Drugs

Artificial silk

All above

An sp3 hybrid orbital contains

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1/4 a character

1/2 a character

2/3 a character

3/4 a character

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