1 |
A molecule has two ions pairs and two bond pairs around the central atom. The shape of molecule is. |
Linear
Pyramidal
Angular
Tetrahedral
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2 |
Which one of the following molecule have angle of 120 o |
Be Cl2
BF3
CH4
NH3
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3 |
Which one of the following correctly describe the shape of NH3 molecules. |
tetrahedral
Pyramidal
Angular
Square planar
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4 |
Ionic bond is formed by combination of groups |
IA and VIII
II A and VII A
IV A and VA
VIA and VII A
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5 |
Which molecules is 100% covalent |
H2
H2O
HF
NH3
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6 |
Suppose a new element 'J' has discovered and has seven electron in the valence shell. Which statement about this element would be correct. |
It is monatomic
It form covalent bond with hydrogen
It forms stable positive ion
It forms covalent bond with group IA element
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7 |
In which of the following Paris, do the elements form a compound by sharing electrons. |
carbon and chlorine
Lithium and iodine
Neon and oxygen
Potassium ad bromine
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8 |
What type of bonding is present in NH4Cl |
Ionic
Covalent
Co ordinate covalent
All of these
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9 |
Which one of the following has no tendency of form coordinate covalent bond with H+ |
NH3
H2O
CH4
CH3OH
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10 |
Which of the following is a polar molecule |
CCl4
HCl
BF3
CO2
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11 |
Which one of the following has the greater ionic characters in it. |
HF
HCl
H2O
H2
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12 |
Ionic compound do nto show the phenomenon of Isomerism because bond are. |
Directional and rigid
Non directional and rigid
Non directional and non rigid
All above
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13 |
Which pair are iso electronic. |
Na+ and Cl-
Na+ and Mg+2
N-3 and P-3
H+ and H-
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14 |
Along period of periodic table shielding effects. |
Increases
Decreases
Remain constant
First increases than decreases
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15 |
Chlorine atom and chloride Cl- ions |
Have same chemical and physical properties
Are allotropes of chlorine
Have same number of electrons
Have same number of proton
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16 |
In a group of periodic table, ionization energy. |
Decreases
Increases
Remains same
First increases than increases
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17 |
In a period of periodic table, atomic radii |
Increases
Decreases
Remain same
First decreases than increases
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