2 4
46.

ay,

50,

Hot objects including human bodies give off some Heat In the form’of
rays, which Is used in night vision goggles.

A) Ultra-Violet 8) Intra-Red GC) Raman D) Microwave
Rain drops doesn't hurt the human éven though itis expected (o travel many
kilometres with acceleration due to gravity because
A) Rain drop isso small to’ harm human
B) It is cooler than our body temperature
C) Of Bernoulli's principle
D) Rain drops possess terminal velocity

. Nobel Prize was shared with Rainer Weiss, Barry C, Barish and Kip S. Thorne for

A) Decisive contributions to the LIGO detector and the observation of gravitational
waves

B) The discovery of interplay ol disorder and fluctuations in physical systems from atomic |
planetary scales

C) Tha discovery of a supermassive compact object at the centre of our galaxy

9) The discovery that black hole formation is a robust prediation of the general theory
of relativity 1. £

- Alloys are substances which possess metallic character and are obtained by

mixing metals. On considering alloys of mercury, which of the following metals form
amalgams ?

1. Manganese ii, Iron ॥. Platinum iv. Niobium

A) Land i B) il and iit ೧) 18೧ರ // 0) ॥ ॥ ५
The geometry of phasphorous pentachtoride is trigonal bipyramidal. When considering

the mixed halide PC!_F, which of the following statements are correct at temperature
above -22°C ?

|, Chlorine atoms occupy axial position and tiuorine atoms equatorial position.

॥ Fluorine atoms occupy axial position and two chlorine atoms and one fluorine atom
In the equatorial position.

ii, ७1 spectrum of the compound shows only one doublet, which results from the.
splitting of the fluorine resonance by the 11.

iv. NMF spectrum shows a multiple which results fram the splitting of fluorine atoms
bonded in more than one way.

A) iran iil 8) ॥ 0 ॥४ 0) 18೧61 D) iand iv

51. Calculate the temperature at which the average speed of H equals that of Oat 640 K.

A

8) 5,006 8) 3.16 1 ‏ای‎ 0.۴
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