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1. A
   Satellite is kept in orbit by remote control from ground station.
2. B
   Satellite is kept in orbit by retro-rocket and solar energy keeps it moving around the Earth.
3. C
   Satellite requires energy from solar panels and solid fuels for orbiting.
4. D
   Satellite does not require any energy for orbiting.

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1. A
   Energy can be created as well as destroyed.
2. B
   Energy can be created but not destroyed.
3. C
   Energy can neither be created nor destroyed.
4. D
   Energy cannot be created but can be destroyed.

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1. A
   increasing electrical power
2. B
   decreasing electrical power
3. C
   decreasing voltage
4. D
   increasing voltage

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

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1. A
   $\frac{11}{3}$ kg
2. B
   $\frac{3}{11}$ kg
3. C
   $\frac{4}{3}$ kg
4. D
   $\frac{3}{4}$ kg

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1. A
   more electropositive than iron
2. B
   cheaper than iron
3. C
   a bluish white metal
4. D
   a good conductor of heat and electricity

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1. A
   Oxygen
2. B
   Hydrogen
3. C
   Nitrogen
4. D
   Carbon dioxide

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1. A
   Cutting of hair
2. B
   Graying of hair naturally
3. C
   Swelling of resin in water
4. D
   Cutting of fruit

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1. A
   Calcium carbonate
2. B
   Calcium bicarbonate
3. C
   Sodium carbonate
4. D
   Sodium bicarbonate

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1. A
   It kills germs
2. B
   It dissolves the impurities
3. C
   It is a reducing agent
4. D
   It is an oxidizing agent

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

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1. A
   Ibn Battuta's $\textit{Rihla}$
2. B
   Francois Bernier's $\textit{Travels in the Mogul Empire}$
3. C
   Niccolao Manucci's $\textit{Storia do Mogor}$
4. D
   Tavernier's $\textit{Travels in India}$

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1. A
   Khwaja Moinuddin
2. B
   Baba Fariduddin Ganj-i-Shakar
3. C
   Nizamuddin Auliya
4. D
   Shaikh Bahauddin Zakariya

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1. A
   Satyagraha in Kheda
2. B
   Dandi March
3. C
   Satyagraha in Champaran
4. D
   Return from South Africa

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1. A
   Dispersion of light
2. B
   Interference of light
3. C
   Diffraction of light
4. D
   Scattering of light by atmospheric dust

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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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