RU Admission Test 2015-2016 (Unit-H, G-Even)

1. An object of 50gm mass is tied to one-end of a rope of 20 cm length and is rotated in a circular path at the rate of 3 rotations per second. Keeping the mass of the object unchanged if length of the rope is made double and rate of rotation is made half then how many times will be the centripetal acceleration?

2. Which one below is more reactive among the compounds below?

3. Choose the word that best completes the text. "People from all over the world are sent by their doctors to breathe the pure, ________air in this mountain region."

4. If wavelength of light is $1000 \mathrm{~nm}$ then what is the wave number? (velocity of light $=3.0 \times 10^{8} \mathrm{~ms}^{-1}$ )

5. In a mirror of $12 \mathrm{~cm}$ focal distance, 3 times magnified virtual image is produced. What is the distance of object from mirror?