Question # 1

Which of the following will exhibit variable electro Valency due to intert pair effect.

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Fe

Sn

K

Both Fe and Sn

The correct order of reactivity among I , Ii, and III IS.

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i > ii >iii

i > iii > ii

II > III > I

III > II > I

Form electron deficient compounds

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B

AI

Both B and AI

None of above

The secondary valency of Conc. CoCl3. 6NH3.

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2

4

6

8

For covalent bond to form between two atoms A and B

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Transference of electrons must take place from A to B

A pair of electrons of A is shared by both A and B

A and B contribute equal no. of electrons for mutual sharing by A and B

One of the atom A or B must already have octet of electrons.

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

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Syneresis

Occlusion

Diffusion

Erosion

Which of the following elements with excess oxygen to form proxides.

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Ca

Mg

Li

Ba

In the electronic structure of acetic acid,the total number of shared and unshaped pair of electrons are respectively.

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16 ,8

8 ,4

12 ,8

8 ,12

Which of the halogens has lowest bond energy.

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Cl2

Br2

F2

I2

The energy gap between tag and eg sets in denoted by

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A-

10 Dq

Both A and B

None of above

Which two atoms of hydrogen combine to form a molecule of hydrogen gas. the energy of the hydrogen molecule is.

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Higher than that of separate H atoms

Equal to that of separate H atoms

Lower than that of separate H atoms

Sometimes lower and sometimes higher than that of separate H.

Oxygen and sulphur exist in state

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Free

Combined

_{Both free & combined}

None of above

Radon is obtained only in the radioactive decay of

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Radium

Thorium

Actinium

Any of above

Which of the following is the correct order of interactions.

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Covalent < hydrogen bonding < Van Der Waal's < dipole -dipole

Van der Waal's < hydrogen bonding < dipole -dipole < covalent

Van der Waal's < dipole -dipole < hydrogen bonding < covalent

Dipole-dipole < Van der Waal's < hydrogen bonding < covalent

Which of the following compounds has highest boiling point.

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HI

HF

HBr

HCl

Which of the ionic possesses highest bond energy.

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C-C

Si -Si

Ge - Ge

Sn -Sn

"Acids are substance whose aqueous solutions turned blue litmus red and tasted sour" stated by

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Davy

Liebig

Boyle

Rouelle

The important condition for the formation of chemical bond is that.

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Their electron clouds should not diffuse

Both atoms should have high electron affinites.

Both atoms should have same electronegativities

The process should be accompanied by the lowering in potential energy.

The dipole moments of the given species are such that.

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BF3 > NF3 > NH3

NF3 > BF3 > NH3

NHE > NF3 >BF3

NH3 > BF3 > NF3

After assimilation urea leaves behind in the soil

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NH3

CO2

Both A and B

None of above

Which of the following is the strongest oxidant.

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F2

Cl2

br2

I2

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