1. A
   Infrasonic waves
2. B
   Ultrasonic waves
3. C
   Radio waves
4. D
   Microwaves

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1. A
   Zeroth law of thermodynamics
2. B
   First law of thermodynamics
3. C
   Second law of thermodynamics
4. D
   Third law of thermodynamics

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1. A
   X-rays
2. B
   Microwaves
3. C
   Radio waves
4. D
   Sound waves

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1. A
   Human eye is a refracting system containing a diverging lens.
2. B
   The retina of the human eye contains millions of light sensitive cells, called rods and cones, which convert the light into electrical messages.
3. C
   Every image that is focused on the retina is upside down.
4. D
   We need both eyes to judge the relative positions of objects accurately.

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1. A
   Ultrasonic waves cannot get reflected, refracted or absorbed.
2. B
   Ultrasonic waves are used to detect the presence of defects like cracks, porosity, etc. in the internal structure of common structure materials.
3. C
   Ultrasonic waves can be used for making holes in very hard materials like diamond.
4. D
   Ultrasonic waves cannot travel through vacuum.

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1. A
   50$^{th}$
2. B
   40$^{th}$
3. C
   30$^{th}$
4. D
   20$^{th}$

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1. A
   Diabetes
2. B
   Food Safety
3. C
   Depression : Let's Talk
4. D
   Ageing and Health

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1. A
   Ministry of Earth Sciences
2. B
   Ministry of Science and Technology
3. C
   Ministry of Information and Broadcasting
4. D
   Ministry of New and Renewable Energy

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   Major Rock Edict 13
2. B
   Rock Edict 6
3. C
   Minor Rock Edict 1
4. D
   Pillar Edict 4

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1. A
   Federation
2. B
   Confederation
3. C
   Unitary form of Government
4. D
   Union of States

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1. A
   Law Commission
2. B
   Santhanam Committee
3. C
   Shah Commission
4. D
   Administrative Reforms Commission

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1. A
   Ozone
2. B
   Ammonia
3. C
   Sulphur dioxide
4. D
   Carbon monoxide

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1. A
   6·5 to 8·5
2. B
   5·0 to 6·5
3. C
   6·5 to 7·0
4. D
   7·0 to 8·5

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1. A
   1 only
2. B
   1 and 2 only
3. C
   2 and 3 only
4. D
   2 and 4 only

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1. A
   One hour
2. B
   Two hours
3. C
   Three hours
4. D
   Four hours

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1. A
   1-2-4-3
2. B
   3-1-2-4
3. C
   3-2-1-4
4. D
   2-3-1-4

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1. A
   Odisha
2. B
   Tamil Nadu
3. C
   Karnataka
4. D
   West Bengal

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1. A
   Maharashtra
2. B
   Chhattisgarh
3. C
   Madhya Pradesh
4. D
   Andhra Pradesh

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1. A
   Gabbro
2. B
   Granite
3. C
   Dolomite
4. D
   Basalt

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1. A
   Pressure gradient
2. B
   Earth's axis of inclination
3. C
   Earth's rotation
4. D
   Earth's revolution

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1. A
   Thailand
2. B
   Cambodia
3. C
   Myanmar
4. D
   Vietnam

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1. A
   Godavari : Indravati
2. B
   Ganga : Penganga
3. C
   Krishna : Bhima
4. D
   Luni : Sukri

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1. A
   Formulation and initial stage
2. B
   Modification stage
3. C
   Full maturity
4. D
   Decay

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1. A
   Dilmun
2. B
   Meluha
3. C
   Magan
4. D
   Failaka

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