Download App

PART - 1 CH - 4 Chemical Bonding and Molecular Structure — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryPART - 1 CH - 4 Chemical Bonding and Molecular Structure2 Marks
Question
Explain with help of suitable example polar covalent bond.
✓

Answer

Polar covalent bond : It is an ideal situation for a bond to be $100 \%$ ionic or covalent. But in reality no bond or compound is completely covalent or ionic.
When a covalent bond is formed between two similar atoms (like $H _2, O _2, Cl _2, N_2$ and $F _2$ ) then the valence electron pair is equally attracted by both atoms. Due to this, the electron pair is located exactly in middle of two identical nuclei. The bond thus obtained is called non-polar covalent bond. On the contrary, in a hetero-atomic molecule like HF, the shared electron pair between two atoms gets displaced towards the more electronegative atom fluorine. This bond is called polar covalent bond.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from PART - 1 CH - 4 Chemical Bonding and Molecular Structure→PART - 1 CH - 4 Chemical Bonding and Molecular Structure — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

What is the relationship between direction of current and flow of electrons by convention?
→
Predict the periods and blocks to which each of the following elements belong?
  1. 13Al
  2. 24Cr
  3. 29Cu
  4. 11Na
→
What are limiting reagent? Explain.
→
When 6.488 gm lead is treated with 1.002 gm oxygen $PbO _2$ is formed. It can form by heating $Pb \left( NO _3\right)_2$ also, in which percentage of oxygen is $13.38 \%$. Prove that it follows law of definite proportion.
→
Justify that the following reactions are redox reactions:

2K(s) + F2(g) → 2K+F-(s)

→
Calculate the volume of water that should be added to 25cm3 of 10M H2SO4 to obtain 0.5M H2SO4 solution.
→
Assign oxidation number to the underlined elements in the following species:

NaHSO4

→
Distinguish between a sigma and a pie bond.
→
Which has more energy.
  1. Last electron of Cl- or last electron of O2-
  2. n = 4, l = 3 or n = 5, l = 2
→
What do you meant by spontaneity? Explain.
→