Science (English Medium) Class 11 - CBSE Question Bank Solutions

How many significant figures are present in the 0.0025?

How many significant figures are present in the 208?

How many significant figures are present in the 5005?

How many significant figures are present in the 126,000?

How many significant figures are present in the 500.0?

How many significant figures are present in the 2.0034?

Round up the following upto three significant figures:

34.216

Round up the following upto three significant figures:

10.4107

Round up the following upto three significant figures:

0.04597

Round up the following upto three significant figures:

2808

How many significant figures should be present in the answer of the following calculation:-

`(0.02856 xx 298.15 xx 0.112)/0.5785`

How many significant figures should be present in the answer of the following calculation?

5 × 5.364

How many significant figures should be present in the answer of the following calculation?

0.0125 + 0.7864 + 0.0215

Write the general outer electronic configuration of p- block elements.

In Rutherford’s experiment, generally the thin foil of heavy atoms, like gold, platinum etc. have been used to be bombarded by the α-particles. If the thin foil of light atoms like aluminium etc. is used, what difference would be observed from the above results?

Write the favourable factors for the formation of the ionic bond.

How do you account for the formation of ethane during chlorination of methane?

Why does boron trifluoride behave as a Lewis acid?

Consider the compound, CCl₄. How will CCl₄ behave with water? Justify.

Describe the shapes of BF₃ and BH₄^–. Assign the hybridisation of boron in these species.