ICSE Worksheet for chapter-2 Chemistry Bonding class 10
Worksheet For class 10
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- Introduction, reasons for chemical bonding.
- Types of bonds- Electrovalent and Covalent bond.
- Periodic properties which affect chemical bond formation.
- Ionization potential
- Electron affinity
- Examples of electrovalent compounds- NaCl, CaO, MgCl2.
- Examples of covalent compounds: H2, Cl2, O2, N2, CCl4, CH4, CH4, H2O, NH3.
- Co-ordinate bond- H3O+, NH4+.
Section - 1
Q1. Name of the following statements:
- Number of protons in the nucleus of an atom.
- Arrangement of electrons in respective shells of atoms.
- Electrons lost or gained by an atom in compound formation.
- Two molecules which are polar.
- A molecule with little affinity.
- Element having eight electrons in their outermost shell.
- Bond present in metallic chloride and two chlorine atoms.
- One polar covalent molecule.
- Usual number of electrons in the outermost shell of an atom of a noble (or inert) gas.
- A particle without any electrons.
- An atom without neutrons in its nucleus.
- Name two cationsiso-electronic to neon.
- Name two anions iso-electronic to argon.
Q2. Give two examples of polar covalent compounds and two examples of non-polar covalent compounds.
Q3. Match the following columns A and B.
|Column A||Column B|
|A. Metal||a)Methane (CH4)|
|B. Covalent compound||b)Sodium chloride (NaCl)|
|C. Non-polar||c) Selenium (Se)|
|D. Polar||d) Chloride ion (Cl-)|
|E. Non-metal||e)Aluminum (Al)|
|F. Electrovalent compound||f)Carbon dioxide (CO2)|
|G. Anion||g) Hydrogen Chloride (HCl)|
|H. Cation||h) Potassium ion (K+)|
Section - 2
- Q4. On what factors the formation of an ionic compound depends?
- Q5. Which conditions are necessary for the formation of co-ordinate bond?
- Q6. Explain the formation of H3O+ and NH4+ ion.
- Q7. Give one property of hydrogen chloride which agrees with it being a covalent compound.
- Q8. Give one property of magnesium chloride which agrees with it being an ionic compound.
- Q9. Name one compound which is covalent, but on dissolving in water conducts electricity?
- Q10. Which property of the above compound agrees with the being of a covalent compound?
- Q11. Why are ionic compounds crystalline solid and soluble in water ?
- Q12. What are the conditions for the formation of an electrovalent bond ?
Q13. Predict the type of bond (ionic or covalent) likely to be formed when pair elements having atomic number combine:
- 3 and 7
- 6 and 9
- 11 and 16
- 14 and 12
- 8 and 16
Q14. The distribution of electrons in three elements is as under: U = 2, 6; V = 2, 8, 7 and W = 2, 8, 1.Use the letter U, V and W as the symbols of elements in answering the following questions. In each case, state whether the bonding is ionic or covalent, and give the formula of molecule or compound formed:
- Between two atoms of U
- Between U and W
- Between V and W.