NEET Class XI Weekly Mock 9 for NEET & AIIMS Exams

Question 1

Which of the following statements is wrong ?

Question 2

A planet in a distant solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11 km s^-1, the escape velocity from the surface of the planet would be

Question 3

A planet of radius R has an acceleration due to gravity of g_s on its surface. A deep smooth tunnel is dug on this planet radially inward to reach a point P located at a distance of

from the centre of the planet. Assume that the planet has uniform density. The kinetic energy required to be given to a small body of mass m, projected radially outward from P, so that it gains a maximum altitude equal to the thrice the radius of the planet from its surface, is equal to

Question 4

Two point mass each having mass m are placed at distance d apart. The particles start moving due to mutual gravitational attraction. Velocity of the particles as the separation reduces to d/2 is

Question 5

Gravitational potential due to a mass distribution is given by V = (x²y + y²z). The gravitational field can be expressed as

Question 6

Temporary hardness of water is due to the presence of

Question 7

Portland cement is manufactured by using

Question 8

Heat required to raise the temperature of 1 mol of a substance by 1^oC is called

Question 9

The enthalpy of hydrogenation of cyclohexene is –119.5 kg mol^–1. If resonance energy of benzene is – 150.4 kJ mol^–1. its enthalpy of hydrogenation would be