671: Rivers that pass through Himachal Pradesh are
(a) Beas and Chenab only
(b) Beas and Ravi only
(c) Chenab, Ravi and Satluj only
(d) Beas, Chenab, Ravi, Satluj and Yamuna
672: Which one of the following statements is not correct?
(a) The presence of NaCl increases the rate of setting of Plaster of Paris
(b) Gypsum is added to the cement to slow down its rate of setting
(c) All alkaline earth metals form hydrated salts
(d) Barium and Strontium are found free in nature
673: Which number does not fit in the series
0, 1, 3, 6, 10, 15, 21, 28, 37, 45
(a) 0
(b) 21
(c) 37
(d) 45
674: In the context of digital technologies for entertainment, consider the following statements:
1. In Augmented Reality (AR), a simulated environment is created and the physical world is completely shut out.
2. In Virtual Reality (VR), images generated from a computer are projected onto real-life objects or surroundings.
3. AR allows individuals to be present in the world and improves the experience using the camera of smart-phone or PC.
4. VR closes the world, and transposes an individual, providing complete immersion experience.
Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 3 and 4
(c) 1, 2 and 3
(d) 4 only
675: Which one of the following National Highways passes through Maharashtra Chhattisgarh and Orissa ?
(a) NH 4
(b) NH 5
(c) Nh 6
(d) NH 7