[Quiz] Science Chemistry- Free Online Test - 2 (7th STD)

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TNPSC Free Online Test by TNPSC GURU.in
Subject	Science - Chemistry
Exam Portions	Tamil Nadu Samacheer Kalvi 7th Std Science - Chemistry Full
Science Chemistry Online Test Series No: 2
No of Questions	20
Duration	10 Min
Difficulty Level	Easy
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1. Select the correct option based on the descending order of Inter-molecular space
   
   1.  Solid-Liquid-Gas
   2.  Gas-Liquid-Solid
   3.  Liquid-Gas-Solid
   4.  Liquid-Solid-Gas
   
   
2. Select the correct option based on the ascending order of Inter-molecular force
   
   1.  Solid-Gas-Liquid
   2.  Liquid-Gas-Solid
   3.  Solid-Liquid-Gas
   4.  Gas-Liquid-Solid
   
   
3. The value of  power in nanometer is
   
   1.  -9
   2.  9
   3.  3
   4.  -3
   
   
4. Which of the following is the fourth state of matter
   
   1.  Plasma - a superheated Gaseous state
   2.  Solid
   3.  Liquid
   4.  Bose-Einstein condensate - super cooled Solids
   
   
5. Which of the following is the fifth state of matter
   
   1.  Plasma - a superheated Gaseous state
   2.  Solid
   3.  Liquid
   4.  Bose-Einstein condensate - super cooled Solids
   
   
6. While cutting vegetable a brown pigment melanin is formed due to the reaction of
   
   1.  Chlorophyll and Oxygen
   2.  Phenolic compound and Oxygen
   3.  Keratin and Oxygen
   4.  Sodium and Oxygen
   
   
7. Which of the following is essential of rusting of Iron?
   
   1.  Oxygen
   2.  Water
   3.  Grease
   4.  Both A and B
   
   
8. The plant in which the flowers blossom in different colour based on the acidity of the soil is
   
   1.  Hydrangea
   2.  Rose
   3.  Hybiscus
   4.  Balsam
   
   
9. The Discolouration of Silver(Tarnishing) is due to the reaction of
   
   1.  Carbondioxide
   2.  Oxygen
   3.  Sulphur
   4.  Nitrogen
   
   
10. Which of the following is known as the king of chemicals
    
    1.  Flurosulphuric Acid
    2.  Sulphuric Acid
    3.  Nitric Acid
    4.  HCL
    
    
11. Which of the following is the known Strongest acid in the world
    
    1.  HCL
    2.  Sulphuric Acid
    3.  Nitric Acid
    4.  Flurosulphuric Acid
    
    
12. Select the Wrong Pair
    
    1.  Vinegar - Acetic Acid
    2.  Tomato - Oxalic Acid
    3.  Ant - Formic Acid
    4.  Grapes - malic Acid
    
    
13. A: Burning of Diesel releases Sulphur dioxide B: Burning of Petrol releases oxides of Nitrogen
    
    1.  Neither A Nor B is Correct
    2.  Both are Correct
    3.  Only A is Correct
    4.  Only B is correct
    
    
14. Natural Gas is a mixture of
    
    1.  Ethane and Propane
    2.  Methane and Butane
    3.  Butane and Propane
    4.  Methane and Ethane
    
    
15. LPG is a mixture of
    
    1.  Methane (15%) and Ethane (85%)
    2.  Methane (15%) and Ethane (85%)
    3.  Butane (15%) and Propane (85%)
    4.  Butane (85%) and Propane (15%)
    
    
16. The gas which gives odour to the LPG is
    
    1.  ethyl oxide
    2.  ethyl mercapton
    3.  ethyl cyanide
    4.  ethyl acetete
    
    
17. Gobar gas is a mixture of
    
    1.  Butane and Propane
    2.  Methane and Ethane
    3.  Methane and Butane
    4.  Ethane and Propane
    
    
18. While burning a candle the hottest point will be having the ___ colour
    
    1.  Blue
    2.  Red
    3.  Yellow
    4.  White
    
    
19. The combustion of white phosphorous is an example of
    
    1.  Rapid Combustion
    2.  Slow Combustion
    3.  Spontaneous Combustion
    4.  Incomplete Combustion
    
    
20. The minimum temperature at which a particular fuel catches fire is
    
    1.  Critical temperature
    2.  ignition temperature
    3.  Sparking temperature
    4.  Burning temperature
    
    

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