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Chemical Bonding - Ionic and Covalent Bonds

Chemical Bonding - Ionic and Covalent Bonds

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements are correct regarding the properties of ionic compounds?
P. Ionic compounds have high melting and boiling points.
Q. Ionic compounds in their molten state do not conduct electricity.
R. Ionic bonds are directional.
S. They are highly soluble in polar solvents.

  1. P and Q
  2. P and R
  3. Q and R
  4. Q and S
  5. R and S
Question 2 Multiple Choice (Single Answer)

Which of the following statements is correct about ionic compounds?

  1. Ionic bond is non directional.
  2. Ionic compounds do not conduct electricity in their molten state.
  3. Ionic compounds are highly soluble in non polar solvents.
  4. The rates of ionic reactions are very slow.
  5. Ionic compounds have very low melting and boiling points.
Question 3 Multiple Choice (Single Answer)

Which of the following elements has a complete octet of electrons?

  1. Fluorine
  2. Oxygen
  3. Krypton
  4. Lithium
Question 4 Multiple Choice (Single Answer)

Which of the following statements is true according to the octet theory?

  1. During bond formation, the elements have a tendency to acquire unstable configuration.
  2. During bond formation, the elements merely change their configuration.
  3. During bond formation, the elements tend to acquire a noble gas configuration.
  4. None of these
Question 5 Multiple Choice (Single Answer)

Which of the following is an example of ionic compounds?

  1. Methane
  2. Ammonia
  3. Sodium chloride
  4. Carbon tetrachloride
Question 6 Multiple Choice (Single Answer)

Which of the following statements is not correct about electrovalent compounds?

  1. These compounds are hard solids.
  2. They have low melting and boiling points.
  3. They are good conductors of electricity in molten or aqueous states.
  4. They are insoluble in organic solvents.
  5. They are soluble in water.
Question 7 Multiple Choice (Single Answer)

Ionic compounds are usually found in

  1. gaseous state
  2. solid state
  3. liquid state
  4. plasma state
Question 8 Multiple Choice (Single Answer)

Which of the following statements is not correct about covalent compounds?

  1. They are readily soluble in water.
  2. Their aqueous solutions do not conduct electricity.
  3. They have low melting and boiling points.
  4. They are formed by sharing of electrons.
Question 9 Multiple Choice (Single Answer)

Which of the following covalent compounds is nonpolar?

  1. H2O
  2. HF
  3. N2
  4. NH3
Question 10 Multiple Choice (Single Answer)

How many electrons are required by nitrogen atom to form a nitride ion?

  1. One
  2. Two
  3. Three
  4. None of these
Question 11 Multiple Choice (Single Answer)

How many electrons are needed by phosphorus to attain the configuration of the nearest noble gas?

  1. 1
  2. 2
  3. 4
  4. 3
Question 12 Multiple Choice (Single Answer)

Why do covalent compounds have low melting and boiling points?

  1. Because they do not consist of ions
  2. Because the intermolecular force of attraction is strong
  3. Because the intermolecular force of attraction is weak
  4. Because the covalent bonds are weak
Question 13 Multiple Choice (Single Answer)

Which of the following compounds will have low boiling and melting points?

  1. H2O
  2. MgCl2
  3. CaO
  4. NaCl
  5. MgCl2
Question 14 Multiple Choice (Single Answer)

Which of the following properties is not true for calcium oxide?

  1. The constituent particles are ions.
  2. It will not conduct electricity in solid state.
  3. It is soluble in water, but insoluble in organic solvents.
  4. It shows slow speed of chemical reactions in aqueous solution.
Question 15 Multiple Choice (Single Answer)

Which of the following is not a polar covalent compound?

  1. Water
  2. Ammonia
  3. Hydrogen fluoride
  4. Chlorine
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