Rayvila

Science Set 2

Q.1 What is laughing gas?

1. Carbon monoxide
2. Sulphur dioxide
3. Nitrous Oxide
4. Hydrogen peroxide

Answer : 3  

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Q.2 Balloons are filled with

1. Argon
2. Nitrogen
3. Helium
4. Oxygen

Answer : 3  

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Q.3 Which of the following is the lightest metal?

1. Lead
2. Lithium
3. Silver
4. Mercury

Answer : 2  

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Q.4 The hardest substance available on earth is

1. Gold
2. Quartz
3. Platinum
4. Diamond

Answer : 4  

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Q.5 Most commercial nuclear power plants worldwide are cooled by

1. Hydrozen
2. Mercury
3. Water
4. Helium

Answer : 3  

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Q.6 Small pox is caused b

1. Fungus
2. Virus
3. Algae
4. Bacteria

Answer : 2  

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Q.7 First Nuclear Plants in India

1. Kakrapar
2. Rawatbhata
3. Narora
4. Tarapur

Answer : 4  

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Q.8 First Satellite Aryabhatta launched by India in the year

1. 1978
2. 1973
3. 1977
4. 1975

Answer : 4  

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Q.9 In which temperature the density of water is maximum ?

1. 4 degree
2. 100 degree
3. 0 degree
4. 273 degree

Answer : 1  

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Q.10 Which device is used to measure the speed of wind

1. Anemometer
2. Calorimeter
3. Chronometer
4. Altimeter

Answer : 1  

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Q.11 Loudness of sound depends upon ________ of the sound wave

1. Frequency
2. Pitch
3. Wavelength
4. Amplitude

Answer : 4  

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Q.12 Which method can be applied to determine purity of a metal ?

1. Boyle's law
2. Pascal's law
3. Archimedes principle
4. Newton's law

Answer : 3  

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Q.13 What is the minimum escape velocity of rocket to be launched into space ?

1. 11 Km/Sec
2. 15 Km/Sec
3. 10 Km/Sec
4. 20 Km/Sec

Answer : 1  

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Q.14 What is the wavelength of visible spectrum ?

1. 1300A0 - 3000A0
2. 8500A0 - 9800A0
3. 3900A0 - 7600A0
4. 7800A0 - 8000A0

Answer : 3  

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Q.15 Which type of mirror is used in the head lights of vehicles ?

1. Plain mirror
2. Concave mirror
3. Parabolic mirror
4. Convex mirror

Answer : 2  

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Q.16 Increased RBC's in the blood leads to a condition called

1. Anemia
2. Haemophilia
3. Polycythemia
4. Leukaemia

Answer : 3  

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Q.17 The spring balance works on the principle of

1. Boyle's Law
2. Hooke's Law
3. Bernoulli's principle
4. Pascal's Law

Answer : 2  

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Q.18 Calcium salts used as fertilizer is:

1. Calcium Carbide
2. Calcium Carbonate
3. Calcium Cyanide
4. Calcium Sulphate

Answer : 4  

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Q.19 Formic acid is produced by

1. White ants
2. Cockroaches
3. Red ants
4. Mosquitoes

Answer : 3  

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Q.20 Which one of the following forms of phosphorus is most reactive?

1. Black phosphorus
2. White phosphorus
3. Violet phosphorus
4. Red phosphorus

Answer : 2  

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Q.21 Ethanol containing 5% water is known as

1. Power
2. Rectified
3. Absolute
4. Dilute

Answer : 2  

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Q.22 There is no life on moon because it has no

1. Water
2. Sulphur
3. Oxygen
4. Nitrogen

Answer : 1  

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Q.23 the poison of honey bee is

1. 206
2. 236
3. 256
4. 226

Answer : 1  

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Q.24 The sound produce by bat is

1. subsonic
2. ultrasonic
3. infrasonic
4. Audible

Answer : 2  

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Q.25 The noble gas used for the treatment of cancer is

1. Helium
2. Argon
3. Krypton
4. Radon

Answer : 4  

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