The Question is from neet-chemistry , and it was created by the author Mr. S M HUSSAIN

Question

Which of the following is NOT a characteristic of covalent compounds?

Mr. S M HUSSAIN · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Properties of covalent compounds
 **Related Topics**: Chemical bonding, intermolecular forces, electrical conductivity
 **Prerequisites**: Understanding of covalent bonding, ionic bonding, and the relationship between bonding and physical properties.
## SOLUTION PATHWAY
**Given Information**:
The question asks to identify a characteristic that is NOT typical of covalent compounds.
**Method & Steps**:
1. Analyze each option to determine if it's a typical characteristic of covalent compounds.
 Reasoning: Covalent compounds are formed by the sharing of electrons between atoms. This type of bonding leads to specific properties.
 Formula/Rule:  None directly applicable, but understanding of covalent bonding is crucial.
2. Evaluate each option against the properties of covalent compounds.
 Working:
    * **A:** Covalent compounds generally have weak intermolecular forces, leading to low melting and boiling points. This is true.
    * **B:**  Many covalent compounds are nonpolar and thus insoluble in polar water but soluble in nonpolar organic solvents. This is generally true.
    * **C:** The strength of intermolecular forces in covalent compounds determines their state at room temperature.  They can exist as gases, liquids, or solids. This is true.
    * **D:** Covalent compounds do not have freely moving charged particles (ions or electrons) in their solid state.  Therefore, they are generally poor conductors of electricity. This is FALSE.
 Key Point: The key difference between covalent and ionic compounds lies in the nature of their bonding and the consequent presence or absence of freely moving charged particles.
3. Identify the option that is NOT a characteristic.
  Result: Option D is the incorrect statement.
  Verification: The other options accurately describe common properties of covalent compounds.
 ## OPTION ANALYSIS
A ✓: They have low melting and boiling points. (True: weak intermolecular forces)
B :x: They are generally insoluble in water but soluble in organic solvents. (Mostly true: depends on polarity)
C :x: They exist as gases, liquids, or solids at room temperature. (True: depends on intermolecular forces)
D :x: They are generally good conductors of electricity in the solid state. (False: lack of free charge carriers)
 ## LEARNING AIDS
 **Common Mistakes**:
  1. Confusing covalent and ionic compounds: Remember that ionic compounds have strong electrostatic forces and are good conductors when molten or dissolved, unlike covalent compounds.
  2. Overgeneralizing solubility: While many covalent compounds are soluble in organic solvents, some are exceptions and can dissolve in water.
 **Quick Tips**:
  1. Focus on the type of bonding (sharing of electrons) to understand the properties.
  2. Remember that electrical conductivity is linked to the presence of mobile charged particles.

Mr. S M HUSSAIN · Answer

They have low melting and boiling points.

Mr. S M HUSSAIN · Answer

They are generally insoluble in water but soluble in organic solvents.

Mr. S M HUSSAIN · Answer

They exist as gases, liquids, or solids at room temperature.

Mr. S M HUSSAIN · Answer

The correct Option is "They are generally good conductors of electricity in the solid state."

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