Easy
639 likes
Question
Distinguish between naphthalene and sodium chloride by two physical properties.
WBBSE
Class X
Physical Science
Ionic and Covalent Bond
02 Mark
2022
Answer
| Properties | Sodium chloride | Naphthalene |
| Melting Point | Has a high melting point (around 801°C). | Has a low melting point (around 80°C) |
| Solubility | Highly soluble in water | Insoluble in water |
Related Questions
More WBBSE Easy level questions
1/12
Easy
516
Q.
How many covalent bonds are present in CHCl3 molecules?
A.
In a CHCl3 (chloroform) molecule, there are four covalent bonds.
View Question
Easy
617
Q.
Give an example of a covalent liquid.
A.
An example of a covalent liquid is water (H2O).
View Question
Easy
910
Q.
The electronic configuration of a hydride ion (H-) is like the electronic configuration of the...
A.
The hydride ion (H⁻) has gained an extra electron, giving it an...
View Question
Easy
605
Q.
The solid state of which of the following compounds is not composed of molecules? (a)...
View Question
Easy
685
Q.
For which of the following ionic compounds no ion has octet? (a) LiH (b) CaO...
A.
(a) LiH Explanation: In lithium hydride (LiH), lithium (Li) has only 2...
View Question
Easy
758
Q.
Why is the formula weight appropriately used instead of the molecular weight in the case...
A.
The formula weight is used for ionic compounds because they don't consist...
View Question
Easy
793
Q.
Define the Octet rule. Give two examples of such compounds in which an exception to...
A.
Octet Rule: Atoms tend to gain, lose, or share electrons to achieve...
View Question
Moderate
653
Q.
How is ionic bond formed in sodium fluoride? (The atomic number of F and Na...
A.
In sodium fluoride (NaF), an ionic bond forms through the transfer of...
View Question
Moderate
837
Q.
What type of chemical bond is present in NH3? Draw Lewis electron dot diagram of...
A.
Ammonia (NH3) has covalent bonds. Lewis electron dot diagram of NH3 :
View Question
Easy
1
Q.
Show the conventional representation of the H2O molecule by ‘dash’ sign
A.
The conventional representation of an H2O molecule using 'dash' signs is H...
View Question
Easy
Q.
Identify the electrovalent and covalent compounds from among the following compounds
A.
Electrovalent (Ionic) Compounds: LiH KCl Covalent Compounds: NH₃ C₂H₆
View Question
Easy
Q.
Give an example of a solid and a liquid covalent compound.
A.
Solid covalent compound: Naphthalene (C₁₀H₈) Liquid covalent compound: Carbon tetrachloride (CCl₄) Both...
View Question