All MCQs in the unit 4: Chemical Bonding and Catalysis (Chemistry) are given:
The MCQs are related with the following content:
- Electronic Theory of Valency and Chemical Bonding
- Types of Chemical Bonds
- Intermolecular Force of Attraction
- Classification of solid on the basis of bond type
- Properties of metallic solids
- Catalysis
1. According to __________ theory every element has a tendency to acquire or to have stable electronic
configuration (ns2
np6).
A] Negative electrovalency
B] Positive electrovalency
C] Electronic Theory of Valency
D] None of the above
2. The valency of an element depends on the number of ______ present in the outermost shell.
A] Electrons
B] Protons
C] Neutrons
D] Hapten
3. ________is known as the number of valence electrons lost or gained or shared by an atom of an element in order to complete its octet and become stable.
A] Valancy
B] Outermost shell
C] Neutrons
D] All of these
4. According to which theory 'atoms with eight electrons in the outermost shell (two in case of helium) are chemically stable'?
A] Positive electrovalency
B] Electronic Theory of Valency
C] Chemical Bonding
D] All of these
5. According to electronic theory of valancy every element has a tendency to have stable electronic configuration which is achieved by forming chemical bond.
A] True
B] False
C] Partially true
D] Partially false
6. Which of the following is/are the correct ststement(s) about electronic theory of valancy?
A] Atoms with eight electrons in the outermost shell (two in case of helium) are chemically stable
B]Atoms with less than eight electrons in valence shell are chemically active and actively take part in chemical reactions.
C] Every element has a tendency to have stable electronic configuration which is achieved by forming chemical bond.
D] All of these
7. Chemical force which holds two or more atom together is known as_________.
A] Chemical reaction
B] Chemical formula
C] Chemical bond
D] Electronic valancy
8. Electropositive elements + Electronegative elements becomes which bond?
A] Covalent bond
B] Metallic bond
C] Ionic bond
D] Hydrogen bond
9. Electronegative elements and hydrogen atom attached to electronegative element becomes which bond?
A] Covalent bond
B] Metallic bond
C] Ionic bond
D] Hydrogen bond
10. Electronegative elements + Electronegative elements becomes which bond?
A] Covalent bond
B] Metallic bond
C] Ionic bond
D] Hydrogen bond
11. The valency of an element depends on the number of electrons present in the outermost shell, such electrons are called as_______.
A] Valancy electrons
B] Protons
C] Neutrons
D] Hapten
12. Electropositive elements + electropositive elements becomes _________ bond.
A] Covalent bond
B] Hydrogen bond
C] Ionic bond
D] Metallic bond
13. Which of the following is not a type of valancy?
A] Electrovalency
B] Covalency
C] Coordinate valency
D] None of the above
14. The number of electrons lost or gained by an atom of an element during the formation of an electrovalent bond is termed as its_______.
A] Electrovalency
B] Negative electrovalency
C] Positive electrovalency y
D] Covalency
15. The valency obtained by the loss of valency electrons from the atom of metallic element so as to complete the outermost orbit is called as_______.
A] Electrovalency
B] Negative electrovalency
C] Positive electrovalency y
D] Covalency
16. Generally metals atoms lose electrons and acquire_______.
A] Negative charge
B] Positive charge
C] Both A and B
D] None of these
17. ________is known as the valency obtained by the gain of valency electrons by the atoms of non-metallic element so as to complete the outermost orbit.
A] Negative charge
B] Positive charge
C] Both A and B
D] None of these
18. Generally non-metals gain electrons and acquire_______.
A] Negative charge
B] Positive charge
C] Both A and B
D] None of these
19. Positively charged cation and negatively charged anion held together by electrostatic force of attraction, the bond formed is called as_______.
A] Ionic bond
B] Electrovalent bond
C] Both A and B
D] None of these
20. Which of the following is/are the characteristics of of ionic compounds?
A] They are hard, crystalline solids.
B] They have high melting and boiling points.
C] They are poor or bad conductors of electricity in solid state.
D] All of these
21. The bond which is formed by mutual sharing of electrons between two similar or dissimilar atoms is called as_______.
A] Ionic bond
B] Covalent bond
C] Metallic bond
D] Electrovalent bond
22. _______is formed by loss and gain of one or more electrons between atoms of metal and non- metal.
A] Ionic bond
B] Covalent bond
C] Metallic bond
D] Co-ordinate bond
23. _______compound contains an ionic character.
A] H2O
B] N2
C] CO2
D] CaO
24. Dative covalent is found in_______.
A] Ammonia
B] ammonium ion
C] sodium chloride
D] nitrogen
25. Malleability and ductility properties are shown by_______.
A] Metallic compounds
B] Covalent compounds
C] Electrovalent compounds
D] Ionic compounds
26. Which of the following is the incorrect statement about covalent compounds?
A] They exist mostly in gaseous or liquid state.
B] They are bad conductor of heat and electricity.
C] They are insoluble in polar solvents
D] None of these
27. The co-ordinate bond is represented by_____
A] Colon (:)
B] Arrow (→)
C] Plus or Minus (±)
D] Upward arrow (↑)
28. Which of the following is/are correct statement(s) about co-ordination compounds?
A] They are slightly soluble in water.
B] The bond of this compound is directional.
C] The B.P. and M.P. of these compounds have intermediate value between electrovalent and covalent compounds
D] All of these
29. Hydrogen bond is represented by_____
A] Downward arrow (↓)
B] Plus or Minus (±)
C] Dotted line (·····)
D] Dashed line (-----)
30. Which of the following is/are characteristics of H-bonded compounds?
A] The strength of cement concrete is due to the hydrogen bond.
B] Water accumulates in cells of animals and plants due to hydrogen bond.
C] Intermolecular hydrogen bonding is responsible for the high boiling point of water.
D] All of these
31. Which of the following is the incorrect statement about metallic (crystal) compounds?
A] They are bad conductor of heat and electricity.
B] They have metallic luster.
C] They are malleable and ductile.
D] Metallic crystals may be hard as well as soft.
32. Intermolecular force of attraction was first discovered by______
A] Marie Curie
B] Nikola Tesla
C] Van der Waal
D] Antoine Lavoisier
33. Weak forces of attraction existing between molecules which cannot be explained on the basis of any other chemical forces of attraction are called as______force of attraction.
A] Faraday's
B] Van der Waal's
C] Dobereiner's
D] Antoine Lavoisier's
34. Which of the following factor(s) affect the Vander Waal’s force of attraction?
A] Number of electrons in the molecule.
B] Surface area of molecule.
C] Molecular size
D] All of these
35. In _______ the molecules are loosely packed.
A] Gas
B] Solid
C] Liquid
D] None of these
36. The substances whose constituent particles (atoms, ions or molecules) are arranged in definite orderly arrangements are called________.
A] Crystalline solids
B] Amorphous solids
C] Both A and B
D] None of these
37. The weak _______ forces are responsible for soft nature of graphite.
A] Faraday's
B] Van der Waal's
C] Dobereiner's
D] Antoine Lavoisier's
38. Identify the incorrect statement about crystalline solids from the following:
A] They have random arrangement of atoms, ions or molecules.
B] They have definite geometry.
C] They have sharp melting points.
D] Examples : Sodium chloride, diamond, graphite , etc.
39. Identify the correct statement about amorphous solids from the following
A] Cleavage is not uniform.
B] They are anisotropic.
C] They do not have definite geometry.
D] Examples: Glass, rubber, plastic.
40. When an amorphous solid is cut with a sharp knife, it results in an _______ breakage.
A] Straight
B] Same
C] Regular
D] Irregular
A] Negative electrovalency
B] Positive electrovalency
C] Electronic Theory of Valency
D] None of the above
Answer: C] Electronic Theory of Valency
2. The valency of an element depends on the number of ______ present in the outermost shell.
A] Electrons
B] Protons
C] Neutrons
D] Hapten
Answer: A] Electrons
3. ________is known as the number of valence electrons lost or gained or shared by an atom of an element in order to complete its octet and become stable.
A] Valancy
B] Outermost shell
C] Neutrons
D] All of these
Answer: A] Valancy
4. According to which theory 'atoms with eight electrons in the outermost shell (two in case of helium) are chemically stable'?
A] Positive electrovalency
B] Electronic Theory of Valency
C] Chemical Bonding
D] All of these
Answer: B] Electronic Theory of Valency
5. According to electronic theory of valancy every element has a tendency to have stable electronic configuration which is achieved by forming chemical bond.
A] True
B] False
C] Partially true
D] Partially false
Answer: A] True
6. Which of the following is/are the correct ststement(s) about electronic theory of valancy?
A] Atoms with eight electrons in the outermost shell (two in case of helium) are chemically stable
B]Atoms with less than eight electrons in valence shell are chemically active and actively take part in chemical reactions.
C] Every element has a tendency to have stable electronic configuration which is achieved by forming chemical bond.
D] All of these
Answer: D] All of these
7. Chemical force which holds two or more atom together is known as_________.
A] Chemical reaction
B] Chemical formula
C] Chemical bond
D] Electronic valancy
Answer: C] Chemical bond
8. Electropositive elements + Electronegative elements becomes which bond?
A] Covalent bond
B] Metallic bond
C] Ionic bond
D] Hydrogen bond
Answer: C] Ionic bond
9. Electronegative elements and hydrogen atom attached to electronegative element becomes which bond?
A] Covalent bond
B] Metallic bond
C] Ionic bond
D] Hydrogen bond
Answer: D] Hydrogen bond
10. Electronegative elements + Electronegative elements becomes which bond?
A] Covalent bond
B] Metallic bond
C] Ionic bond
D] Hydrogen bond
Answer: A] Covalent bond
11. The valency of an element depends on the number of electrons present in the outermost shell, such electrons are called as_______.
A] Valancy electrons
B] Protons
C] Neutrons
D] Hapten
Answer: A] Valancy electrons
12. Electropositive elements + electropositive elements becomes _________ bond.
A] Covalent bond
B] Hydrogen bond
C] Ionic bond
D] Metallic bond
Answer: D] Metallic bond
13. Which of the following is not a type of valancy?
A] Electrovalency
B] Covalency
C] Coordinate valency
D] None of the above
Answer: D] None of the above
14. The number of electrons lost or gained by an atom of an element during the formation of an electrovalent bond is termed as its_______.
A] Electrovalency
B] Negative electrovalency
C] Positive electrovalency y
D] Covalency
Answer: A] Electrovalency
15. The valency obtained by the loss of valency electrons from the atom of metallic element so as to complete the outermost orbit is called as_______.
A] Electrovalency
B] Negative electrovalency
C] Positive electrovalency y
D] Covalency
Answer: C] Positive electrovalency
16. Generally metals atoms lose electrons and acquire_______.
A] Negative charge
B] Positive charge
C] Both A and B
D] None of these
Answer: B] Positive charge
17. ________is known as the valency obtained by the gain of valency electrons by the atoms of non-metallic element so as to complete the outermost orbit.
A] Negative charge
B] Positive charge
C] Both A and B
D] None of these
Answer: A] Negative charge
18. Generally non-metals gain electrons and acquire_______.
A] Negative charge
B] Positive charge
C] Both A and B
D] None of these
Answer: A] Negative charge
19. Positively charged cation and negatively charged anion held together by electrostatic force of attraction, the bond formed is called as_______.
A] Ionic bond
B] Electrovalent bond
C] Both A and B
D] None of these
Answer: C] Both A and B
20. Which of the following is/are the characteristics of of ionic compounds?
A] They are hard, crystalline solids.
B] They have high melting and boiling points.
C] They are poor or bad conductors of electricity in solid state.
D] All of these
Answer: D] All of these
21. The bond which is formed by mutual sharing of electrons between two similar or dissimilar atoms is called as_______.
A] Ionic bond
B] Covalent bond
C] Metallic bond
D] Electrovalent bond
Answer: B] Covalent bond
22. _______is formed by loss and gain of one or more electrons between atoms of metal and non- metal.
A] Ionic bond
B] Covalent bond
C] Metallic bond
D] Co-ordinate bond
Answer: A] Ionic bond
23. _______compound contains an ionic character.
A] H2O
B] N2
C] CO2
D] CaO
Answer: D] CaO
24. Dative covalent is found in_______.
A] Ammonia
B] ammonium ion
C] sodium chloride
D] nitrogen
Answer: B] ammonium ion
25. Malleability and ductility properties are shown by_______.
A] Metallic compounds
B] Covalent compounds
C] Electrovalent compounds
D] Ionic compounds
Answer: A] Metallic compounds
26. Which of the following is the incorrect statement about covalent compounds?
A] They exist mostly in gaseous or liquid state.
B] They are bad conductor of heat and electricity.
C] They are insoluble in polar solvents
D] None of these
Answer: D] None of these
27. The co-ordinate bond is represented by_____
A] Colon (:)
B] Arrow (→)
C] Plus or Minus (±)
D] Upward arrow (↑)
Answer: B] Arrow (→)
28. Which of the following is/are correct statement(s) about co-ordination compounds?
A] They are slightly soluble in water.
B] The bond of this compound is directional.
C] The B.P. and M.P. of these compounds have intermediate value between electrovalent and covalent compounds
D] All of these
Answer: D] All of these
29. Hydrogen bond is represented by_____
A] Downward arrow (↓)
B] Plus or Minus (±)
C] Dotted line (·····)
D] Dashed line (-----)
Answer: C] Dotted line (·····)
30. Which of the following is/are characteristics of H-bonded compounds?
A] The strength of cement concrete is due to the hydrogen bond.
B] Water accumulates in cells of animals and plants due to hydrogen bond.
C] Intermolecular hydrogen bonding is responsible for the high boiling point of water.
D] All of these
Answer: D] All of these
31. Which of the following is the incorrect statement about metallic (crystal) compounds?
A] They are bad conductor of heat and electricity.
B] They have metallic luster.
C] They are malleable and ductile.
D] Metallic crystals may be hard as well as soft.
Answer: A] They are bad conductor of heat and electricity.
32. Intermolecular force of attraction was first discovered by______
A] Marie Curie
B] Nikola Tesla
C] Van der Waal
D] Antoine Lavoisier
Answer: C] Van der Waal
33. Weak forces of attraction existing between molecules which cannot be explained on the basis of any other chemical forces of attraction are called as______force of attraction.
A] Faraday's
B] Van der Waal's
C] Dobereiner's
D] Antoine Lavoisier's
Answer: B] Van der Waal's
34. Which of the following factor(s) affect the Vander Waal’s force of attraction?
A] Number of electrons in the molecule.
B] Surface area of molecule.
C] Molecular size
D] All of these
Answer: D] All of these
35. In _______ the molecules are loosely packed.
A] Gas
B] Solid
C] Liquid
D] None of these
Answer: C] Liquid
36. The substances whose constituent particles (atoms, ions or molecules) are arranged in definite orderly arrangements are called________.
A] Crystalline solids
B] Amorphous solids
C] Both A and B
D] None of these
Answer: A] Crystalline solids
37. The weak _______ forces are responsible for soft nature of graphite.
A] Faraday's
B] Van der Waal's
C] Dobereiner's
D] Antoine Lavoisier's
Answer: B] Van der Waal's
38. Identify the incorrect statement about crystalline solids from the following:
A] They have random arrangement of atoms, ions or molecules.
B] They have definite geometry.
C] They have sharp melting points.
D] Examples : Sodium chloride, diamond, graphite , etc.
Answer: A] They have random arrangement of atoms, ions or molecules.
39. Identify the correct statement about amorphous solids from the following
A] Cleavage is not uniform.
B] They are anisotropic.
C] They do not have definite geometry.
D] Examples: Glass, rubber, plastic.
Answer: B] They are anisotropic.
40. When an amorphous solid is cut with a sharp knife, it results in an _______ breakage.
A] Straight
B] Same
C] Regular
D] Irregular
Answer: D] Irregular
 MCQs - Unit 4: Chemical Bonding and Catalysis (Chemistry) MCQs |MSBTE I Scheme){kind=link}
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