Chemistry Ncert Level -01 - A- 50Q

Santhosh Kumar Athaluri Santhosh Kumar Athaluri
Dec 28, 2020 - 16:50 Updated: Dec 29, 2020 - 17:14
0

1. Which of the following is a super-cooled liquid?

(1) Ice-cream
(2) Ammonia
(3) Glass
(4) Wood

2. Soap is prepared by boiling caustic soda with –

(1) Alcohol
(2) Kerosene oil
(3) Glycerine
(4) Fats

3. Bronze is an alloy of –

(1) Copper and Zinc
(2) Tin and Zinc
(3) Copper and Tin
(4) Iron and Zinc

4. Which of the following elements is non-radioactive?

(1) Uranium
(2) Thorium
(3) Plutonium
(4) Zirconium

5. The gas used for artificial fruit ripening of green fruit is –

(1) Ethylene
(2) Acetylene
(3) Ethane
(4) Methane

6. Manganite is an ore/mineral of

(1) Beryllium
(2) Chromium
(3) Manganese
(4) Copper

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

8. The freezing point of fresh water is -

(1) 0°C
(2) 4°C
(3) 3°C
(4) 5 C

9. What is used for making vinegar.

(1) Tartaric acid
(2) Malic acid
(3) Oxalic acid
(4) Acetic acid

10. Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table?

(1) Scandium
(2) Gallium
(3) Titanium
(4) Germanium

11. The most reactive among the halogens is -

(1) Fluorine
(2) Chlorine
(3) Bromine
(4) Iodine

12. Which one of the following organic compounds has fruity smell?

(1) Alcohol
(2) Aldehyde
(3) Ester
(4) Ether

13. What material is used to make electric heater coil?

(1) Copper
(2) Iron
(3) Silver
(4) Nichrome

14. Which one of the following is a major green gas?

(1) Carbon dioxide
(2) Chlorofluorocarbon
(3) Carbon monoxide
(4) Freon

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

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

17. Steel contains –

(1) 0.1 - 2?rbon
(2) 5 - 10?rbon
(3) more than 10?rbon
(4) no carbon

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

19. The Refrigerant 'FREON' is –

(1) Calcium Tetra Fluoride
(2) Difluoro Dichloro Methane
(3) Fluorspar and Felspar
(4) Hydrofluosilicic Acid

20. what is the number of shells for elements of the 3rd period.

(1) 2
(2) 1
(3) 0
(4) 3

21. Which one among the following polymers is used for making bullet-proof material?

(1) Polyvinyl chloride
(2) Polystyrene
(3) Polyethylene
(4) Polyamide

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

23. The isotope of Uranium capable of sustaining chain reaction is -

(1) U-235
(2) U-238
(3) U-239
(4) N.O.T.

24. Conversion of chemical energy into electrical energy occurs in -

(1) Atomic bombs
(2) Dynamo
(3) A battery
(4) Electric heaters

25. The fuel that is used in modern submarines is –

(1) Nuclear fuel
(2) Petrol
(3) Coal
(4) Diesel

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

27. Which one of the following elements is least likely to be found in commercial fertilizers?

(1) Nitrogen
(2) Phosphorous
(3) Potassium
(4) Silicon

28. In the electroplating of gold, the electrolyte used is –

(1) Gold chloride
(2) Gold nitrate
(3) Gold sulphate
(4) Potassium aurocyanide

29. The basic chemical building block of natural rubber obtained from trees is –

(1) Isoprene
(2) Vinyl Chloride
(3) Acetylene
(4) Neoprene

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

31. 'Red Ink' is prepared from -

(1) Phenol
(2) Aniline
(3) Congo redd
(4) Eosin

32. Gas released during Bhopal tragedy was -

(1) Sodium isothiocyanate
(2) Ethyl isothiocyanate
(3) Potassium isothiocyanate
(4) Methyl isothiocyanate

33. Oil of vitriol is -

(1) nitric acid
(2) sulfuric acid
(3) hydrochloric acid
(4) phosphoric acid

34. Hydrogen was discovered by -

(1) Cavendish
(2) Lavosier
(3) Rutherford
(4) Scheele

35. Glass is a –

(1) pure solid
(2) supercooled liquid
(3) gel
(4) polymer

36. Uranium eventually decays into a stable isotope of

(1) Radium
(2) Thorium
(3) Lead
(4) Polonium

37. The substance that is added to make natural rubber strong and more bouncy is

(1) Polythene
(2) Sponge
(3) Sulphur
(4) Chlorine

38. White phosphorus is always kept under

(1) benzene
(2) kerosene
(3) ether
(4) water

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

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

41. The chemical name of 'Common salt' is

(1) Sodium chloride
(2) Sodium nitrate
(3) Ammonium chloride
(4) Calcium chloride

42. By-product obtained by soap industry is –

(1) Caustic soda
(2) Glycerol
(3) Naphthalene
(4) Caustic potash

43. Polythene is polymer of –

(1) Ethylene
(2) Propylene
(3) Acetylene
(4) Aniline

44. Which one is not micronutrient?

(1) Iron
(2) Zinc
(3) Sulphur
(4) Manganese

45. Who suggested that the most of the mass of atom is located in nucleus?

(1) Bohr
(2) Thomson
(3) Rutherford
(4) Avogadro

46. Electromagnet is constructed with which of the following?

(1) Steel
(2) Soft Iron
(3) Aluminium
(4) Nickel

47. Which one of the following is a cation?

(1) Carbonate
(2) Nitrite
(3) Ammonium
(4) Hydroxide

48. Ginger is an example of -

(1) Modified Node
(2) Modified Root
(3) Modified Stem
(4) Tap Root

49. The ore which is found in abundance in India is -

(1) monazite
(2) bauxite
(3) magnetite
(4) fluorspar

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

Tags: