Moderate
0 likes
Question
Draw electron-dot structure of calcium oxide.
[Atomic numbers of Ca and O are 20 and 8 respectively]
WBBSE
Class X
Physical Science
Ionic and Covalent Bond
02 Mark
2025
Answer
Electron-dot structure of Calcium Oxide (CaO):
![Draw electron-dot structure of calcium oxide. [Atomic numbers of Ca and O are 20 and 8 respectively] 1 exec 091617f7 8908 428b a13f ca635499a38b](/wp-content/uploads/2026/08/exec-091617f7-8908-428b-a13f-ca635499a38b.png)
Related Questions
More WBBSE Moderate level questions
1/12
Moderate
Q.
Explain why the melting point of sodium chloride is much greater than that of glucose.
A.
Sodium chloride has a much higher melting point than glucose because NaCl...
View Question
Moderate
743
Q.
Show by the help of a property of sodium chloride that sodium chloride is composed...
A.
Sodium chloride (NaCl) conducts electricity when dissolved in water, indicating it is...
View Question
Moderate
764
Q.
Show by drawing a Lewis dot diagram of CH4 that CH4 is formed by covalent...
A.
Lewis dot diagram of CH4 Carbon shares one of its four valence...
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
Moderate
Q.
Liquid hydrogen chloride is unable to conduct electricity, but molten sodium chloride is able to...
A.
Liquid hydrogen chloride (HCl) is a covalent compound and does not contain...
View Question
Moderate
544
Q.
What type of chemical bond is present in MgCl2? How are the chemical bonds formed...
A.
MgCl2 (magnesium chloride) contains ionic bonds. Formation of Chemical Bonds in MgCl2...
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
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
Easy
639
Q.
Distinguish between naphthalene and sodium chloride by two physical properties.
A.
Properties Sodium chloride Naphthalene Melting Point Has a high melting point (around...
View Question
Easy
Q.
Which of the following compounds has no existence as a separate and distinct molecule?
A.
(d) NaCl Explanation Sodium chloride (NaCl) is an ionic compound. It does...
View Question