Chemistry Ncert Level -01 - A- 50Q
1. Which of the following is a super-cooled liquid?
(1) Ice-cream
(2) Ammonia
(3) Glass
(4) Wood
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2. Soap is prepared by boiling caustic soda with –
(1) Alcohol
(2) Kerosene oil
(3) Glycerine
(4) Fats
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3. Bronze is an alloy of –
(1) Copper and Zinc
(2) Tin and Zinc
(3) Copper and Tin
(4) Iron and Zinc
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4. Which of the following elements is non-radioactive?
(1) Uranium
(2) Thorium
(3) Plutonium
(4) Zirconium
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5. The gas used for artificial fruit ripening of green fruit is –
(1) Ethylene
(2) Acetylene
(3) Ethane
(4) Methane
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6. Manganite is an ore/mineral of
(1) Beryllium
(2) Chromium
(3) Manganese
(4) Copper
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7. The presence of which of the following salts in water causes corrosion in steam boilers?
(1) Sodium Chloride
(2) Magnesium Chloride
(3) Calcium bicarbonate
(4) Potassium bicarbonate
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8. The freezing point of fresh water is -
(1) 0°C
(2) 4°C
(3) 3°C
(4) 5 C
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9. What is used for making vinegar.
(1) Tartaric acid
(2) Malic acid
(3) Oxalic acid
(4) Acetic acid
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10. Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table?
(1) Scandium
(2) Gallium
(3) Titanium
(4) Germanium
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11. The most reactive among the halogens is -
(1) Fluorine
(2) Chlorine
(3) Bromine
(4) Iodine
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12. Which one of the following organic compounds has fruity smell?
(1) Alcohol
(2) Aldehyde
(3) Ester
(4) Ether
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13. What material is used to make electric heater coil?
(1) Copper
(2) Iron
(3) Silver
(4) Nichrome
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14. Which one of the following is a major green gas?
(1) Carbon dioxide
(2) Chlorofluorocarbon
(3) Carbon monoxide
(4) Freon
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15. Pasteurisation is the process in which milk is heated to –
(1) 60°C for 10 minutes
(2) 63° C for 20 minutes
(3) 63°C for 30 minutes
(4) 72°C for 10 minutes
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16. What is the maximum Water Vapour content in the atmosphere?
(1) 2 to 3 per cent
(2) 3 to 4 per cent
(3) 4 to 5 per cent
(4) 5 to 6 per cent
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17. Steel contains –
(1) 0.1 - 2?rbon
(2) 5 - 10?rbon
(3) more than 10?rbon
(4) no carbon
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18. The chemicals most commonly used for cloud seeding or artificial rainmaking' is/are
(1) Silver Iodide
(2) Sodium Chloride
(3) Dry ice or frozen carbon dioxide
(4) All the above
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19. The Refrigerant 'FREON' is –
(1) Calcium Tetra Fluoride
(2) Difluoro Dichloro Methane
(3) Fluorspar and Felspar
(4) Hydrofluosilicic Acid
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20. what is the number of shells for elements of the 3rd period.
(1) 2
(2) 1
(3) 0
(4) 3
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21. Which one among the following polymers is used for making bullet-proof material?
(1) Polyvinyl chloride
(2) Polystyrene
(3) Polyethylene
(4) Polyamide
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22. The nucleus of an atom consists of -
(1) electrons and neutrons
(2) electrons and protons
(3) protons and neutrons
(4) All of the above
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23. The isotope of Uranium capable of sustaining chain reaction is -
(1) U-235
(2) U-238
(3) U-239
(4) N.O.T.
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24. Conversion of chemical energy into electrical energy occurs in -
(1) Atomic bombs
(2) Dynamo
(3) A battery
(4) Electric heaters
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25. The fuel that is used in modern submarines is –
(1) Nuclear fuel
(2) Petrol
(3) Coal
(4) Diesel
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26. When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is -
(1) Hydrogen
(2) Oxygen
(4) All of them
(3) Carbon dioxide
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27. Which one of the following elements is least likely to be found in commercial fertilizers?
(1) Nitrogen
(2) Phosphorous
(3) Potassium
(4) Silicon
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28. In the electroplating of gold, the electrolyte used is –
(1) Gold chloride
(2) Gold nitrate
(3) Gold sulphate
(4) Potassium aurocyanide
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29. The basic chemical building block of natural rubber obtained from trees is –
(1) Isoprene
(2) Vinyl Chloride
(3) Acetylene
(4) Neoprene
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30. The name of plastic polymer from which combs, toys, bowls etc., can be made, is
(1) Polyurethane
(2) Polystyrene
(3) Metallic polysulphides
(4) Teflon
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31. 'Red Ink' is prepared from -
(1) Phenol
(2) Aniline
(3) Congo redd
(4) Eosin
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32. Gas released during Bhopal tragedy was -
(1) Sodium isothiocyanate
(2) Ethyl isothiocyanate
(3) Potassium isothiocyanate
(4) Methyl isothiocyanate
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33. Oil of vitriol is -
(1) nitric acid
(2) sulfuric acid
(3) hydrochloric acid
(4) phosphoric acid
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34. Hydrogen was discovered by -
(1) Cavendish
(2) Lavosier
(3) Rutherford
(4) Scheele
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35. Glass is a –
(1) pure solid
(2) supercooled liquid
(3) gel
(4) polymer
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36. Uranium eventually decays into a stable isotope of
(1) Radium
(2) Thorium
(3) Lead
(4) Polonium
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37. The substance that is added to make natural rubber strong and more bouncy is
(1) Polythene
(2) Sponge
(3) Sulphur
(4) Chlorine
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38. White phosphorus is always kept under
(1) benzene
(2) kerosene
(3) ether
(4) water
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39. The amount of Chlorine available in water after disinfection is called as –
(1) free chlorine
(2) residual chlorine
(3) free available chlorine
(4) combined available chlorine
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40. What are the major pollutants of cigarette smoke?
(1) Carbon monoxide and dioxin
(2) Carbon monoxide and nicotine
(3) Carbon monoxide and benzene
(4) Dioxin and benzene
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41. The chemical name of 'Common salt' is
(1) Sodium chloride
(2) Sodium nitrate
(3) Ammonium chloride
(4) Calcium chloride
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42. By-product obtained by soap industry is –
(1) Caustic soda
(2) Glycerol
(3) Naphthalene
(4) Caustic potash
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43. Polythene is polymer of –
(1) Ethylene
(2) Propylene
(3) Acetylene
(4) Aniline
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44. Which one is not micronutrient?
(1) Iron
(2) Zinc
(3) Sulphur
(4) Manganese
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45. Who suggested that the most of the mass of atom is located in nucleus?
(1) Bohr
(2) Thomson
(3) Rutherford
(4) Avogadro
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46. Electromagnet is constructed with which of the following?
(1) Steel
(2) Soft Iron
(3) Aluminium
(4) Nickel
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47. Which one of the following is a cation?
(1) Carbonate
(2) Nitrite
(3) Ammonium
(4) Hydroxide
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48. Ginger is an example of -
(1) Modified Node
(2) Modified Root
(3) Modified Stem
(4) Tap Root
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49. The ore which is found in abundance in India is -
(1) monazite
(2) bauxite
(3) magnetite
(4) fluorspar
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50. Baryllium Sulphate is less soluble in water due to –
(1) High inflammable energy
(2) Low Energy of dissociation
(3) Low inflammable energy
(4) Sonic band
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