Which is the densest planet in our solar system?

Consider the following statements:

1. Escape velocity on the surface of earth is 11.2 km/s.

2. Jupiter has the largest number of satellites.

3. Venus is known as the morning and evening star.

Which of the above statement(s) are/is correct?

Which of the following statement(s) is/are correct?

1. All the weather phenomena occur in troposphere.

2. Ozone layer is present in the stratosphere.

3. Stratosphere is considered ideal for flying aeroplanes.