CBSE Class 11   CBSE Class 11 Chemistry

An element with mass number 81 contains 31 (2)
In Rutherford's experiment, generally the thin foil of heavy atoms (2)
The diameter of zinc atom is 2.6 A (2)
If the diameter of a carbon atom is 0.15 nm (2)
Why does the charge-to-mass ratio of positive rays (2)
Use the molecular orbital energy level diagram to show that (2)
Explain why HF is less viscous than $H _{ 2 }O$ (1)
Out of H and ${ H }_{ 2 }$, the latter has higher first ionisation energy (2)
Apart from tetrahedral geometry (2)
Is there any change in the hybridisation (2)
What is the total number of sigma and pi bonds (2)
Using VSEPR theory, draw the molecular structures (2)
Explain the shape of ${ I }_{ 3 }^{ - }$ ion (1)
Discuss the shape of the following molecules using VSEPR model (2)
Explain the non-linear shape of $H _{ 2 }S$ and non-planar shape (2)
Explain the important aspects of resonance (2)
Although geometries of ${ NH }_{ 3 }$ and $H _{ 2 }O$ (2)
Explain the shape of ${ BrF }_{ 5 }$ (1)
What do you understand by bond pairs and lone pairs of electrons? (2)
Which of the following has larger bond angle in each pair? (2)
Draw the Lewis structures for the following molecule and ions (2)
Define octet rule (1)
Write the significance of dipole moment (1)
Define electronegativity (2)
Give reasons for the following :Ethyne molecule is linear (2)
Use Lewis symbols to show electron transfer between (2)
Give reason for the following questions below (2)
Which is more polar (2)
Arrange the bonds in order of increasing ionic character in the molecules (2)
Arrange the following bonds in order of increasing ionic character (2)