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CHEMICAL BONDS
Unit – V CHEMICAL BONDS - CHEMISTRY
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Question 1 |
As per the octet rule, noble gases are stable in nature. This is due to the presence of ……. Electrons in their outer most shell.
eight | |
seven | |
six |
Question 2 |
The element that would form cation due to loss of electron during the chemical reaction ……….
chlorine | |
lithium | |
fluorine |
Question 3 |
Atomic number of magnesium is 12. Then its electron distribution is ……………
2,2,8 | |
2,8,2 | |
8,2,2 |
Question 4 |
An element X has 6 electrons in the outermost shell. Then the number of electrons shared by X with another atom to form a covalent bond is ………….
3 | |
2 | |
6 |
Question 5 |
The compound that possesses high melting point is ……………
NH3 | |
NaF |
Question 6 |
Bond in which the electrons are equally shared is …………
polar bond | |
non-polar bond | |
tonic bond |
Question 7 |
Pick out the wrong statement about the properties of covalent compounds.
They are neither hard nor brittle | |
Molecular reactions are fast |
Question 8 |
CH4 is a/an ………….. compound.
covalent | |
tonic |
Question 9 |
The scientist who gave the octet rule.
Dalton | |
Lothar Meyer | |
Lewis | |
Newland |
Question 10 |
The element which gives off an electron to become an anion.
Sodium | |
Fluorine | |
Chlorine | |
Argon |
Question 11 |
The element which accepts an electron to become an cation.
Hydrogen | |
Magnesium | |
Chlorine | |
Neon |
Question 12 |
Number of valence electrons in Magnesium.
1 | |
2 | |
3 | |
4 |
Question 13 |
Atomic number of sodium is ……………….
11 | |
10 | |
12 | |
17 |
Question 14 |
Bond in which electron pairs are equally shared is …………..
polar bond | |
non-polar bond | |
tonic bond | |
none of these |
Question 15 |
Electronic configuration of sodium atom
2,8,7 | |
2,8,1 | |
2,8,2 | |
2,8,8 |
Question 16 |
Valence electrons of Nitrogen.
6 | |
2 | |
5 | |
1 |
Question 17 |
Noble gases have ………… electrons in the valence shell.
eight | |
seven | |
six | |
five |
Question 18 |
Bonds in which electron pairs are not equally shared are called …………… bonds.
electrovalent | |
polar | |
non polar | |
ionic |
Question 19 |
An atom which gives off electrons becomes a…………..
anion | |
cation |
Question 20 |
Covalent compounds are formed by ……………
Transfer of electrons | |
Sharing of electrons |
Question 21 |
Bonds in which electron pairs are equally shared are ………….. bonds.
Non-polar | |
polar |
Question 22 |
Noble gases have …………… electrons in the outermost shell.
eight | |
seven |
Question 23 |
Covalent compounds are ……………. of electricity.
Conductors | |
non-conductors |
Question 24 |
Match the following:
Element Atomic Number
- Sodium - a) 17
- Magnesium - b) 10
- Chlorine - c) 11
- Neon - d) 12
1 2 4 3 | |
3 4 1 2 | |
4 3 2 1 | |
2 1 3 4 |
Question 25 |
Match the following:
Element Valence Electrons
- Magnesium - a) 6
- Oxygen - b) 5
- Sodium - c) 2
- Nitrogen - d) 1
4 3 2 1 | |
3 4 1 2 | |
1 2 4 3 | |
2 4 1 3 |
Question 26 |
Match the following:
Compound Bonds
- Sodium chloride - a) non-polar bond
- Benzene - b) polar bond
- Carbon monoxide - c) ionic bond
- Water - d) Co-ordinate covalent bond
4 3 2 1 | |
2 4 1 3 | |
1 2 4 3 | |
3 4 1 2 |
Question 27 |
Match the following:
1) MgCl2 - a) Co-ordinate covalent
2) Cl2 - b) Ionic component
3) NH4 - c) Covalent compound
3 2 1 | |
2 1 3 | |
1 2 3 | |
3 1 2 |
Question 28 |
- Assertion (A) : Argon and Neon are inert gases.
- Reason (R) : They have the stable electronic configuration of 8 electrons in their outermost shell.
A is correct, R is wrong | |
A is wrong, R is correct | |
A is correct, R does not explain A | |
R explains A |
Question 29 |
- Assertion (A) : Octet Rule was given by G N Lewis.
- Reason (R) : Sodium chloride is formed by the sharing of electrons.
A is correct, R is wrong | |
A is wrong, R is correct | |
A is correct, R does not explain A | |
R explains A |
Question 30 |
- Assertion (A) : The atom which accepts electrons becomes the cation.
- Reason (R) : Sodium has one valence electron.
A is correct, R is wrong | |
A is wrong, R is correct | |
A is correct, R does not explain A | |
R explains A |
Question 31 |
- Assertion (A) : In solid state tonic compounds are poor conductors of electricity.
- Reason (R) : Only in molten state or in aqueous solutions the ions are free to move.
A is correct, R is wrong | |
A is wrong, R is correct | |
A is correct, R does not explain A | |
R explains A |
Question 32 |
- Assertion (A) : Ionic reactions are fast.
- Reason (R) : Covalent compounds are gases, liquids or soft solids at room temperature.
A is correct, R is wrong | |
A is wrong, R is correct | |
A is correct, R explain A | |
Both A and R are correct |
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