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प्रश्न
What type of bond is present in the following molecule?
O2
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उत्तर
A covalent bond is the bond present in O2 as one oxygen atom shares its electrons with another oxygen atom.
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संबंधित प्रश्न
Write the number of covalent bonds in the molecule of butane, C4H10.
Explain the bonding in methane molecule using electron dot structure.
Choose the most appropriate answer from the following list of oxides which fit the description.
A covalent oxide of a metalloid.
Give the formula of the compound that would be formed by the combination of the following pair of elements:
K and H
Explain why, diamond has a high melting point.
Why are covalent compounds generally poor conductors of electricity?
The electronic configurations of three elements X, Y and Z are as follows:
| X | 2, 4 |
| Y | 2, 7 |
| Z | 2, 1 |
(a) Which two elements will combine to form an ionic compound?
(b) Which two elements will react to form a covalent compound?
Give reasons for your choice.
Explain the following term with example.
Homopolymer
Taking hydrogen chloride and methane as examples, distinguish between a polar covalent bond and a non polar covalent bond.
Give examples for the following:
Two gaseous polar compounds.
In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
Answer the following question.
What is methane? Draw its electron dot structure. Name the type of bonds formed in this compound. Why are such compounds:
(i) poor conductors of electricity? and
(ii) have low melting and boiling points? What happens when this compound burns in oxygen?
Identify the incorrect statement and correct them.
- Like covalent compounds, coordinate compounds also contain charged particles (ions). So they are good conductors of electricity.
- Ionic bond is a weak bond when compared to Hydrogen bond.
- Ionic or electrovalent bonds are formed by mutual sharing of electrons between atoms.
- Loss of electrons is called Oxidation and gain of electron is called Reduction.
- The electrons which are not involved in bonding are called valence electrons.
The number of pi-bonds present in benzoic acid molecule are ______.
Consider the coordination compound, K2[Cu(CN)4]. A coordinate covalent bond exists between:
Which of the following compounds of carbon does not consist of ions?
Which of the following statements are correct for carbon compounds?
- Most carbon compounds are good conductors of electricity.
- Most carbon compounds are poor conductors of electricity.
- Force of attraction between molecules of carbon compounds is not very strong.
- Force of attraction between molecules of carbon compounds is very strong.
Assertion (A): Melting point and boiling point of ethanol are lower than that of sodium chloride.
Reason (R): The forces of attraction between the molecules of ionic compounds are very strong.
Non-polar covalent compounds are ______ conductors of heat and electricity.
