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You Are On Question Answer Bank SET 0
1. When water freezes its density-
Answer: Decreases
2. Atoms ofthe same element, i. e., having the Same atomic number that differ in atomic Weight, are called-
Answer: Isotopes
3. The metalthat is present in Photo Films is–
Answer: Silver
4. Which ofthe following is not a neutral oxide ?
Answer: SulphurDioxide
5. Themanufacture of iron ore Involves the process of-
Answer: Reduction
6. Which ofthe following is in liquid form at room temperature ?
Answer: Francium
7. Which ofthe following is used in making smoke bombs ?
Answer: Phosphorus
8. Which ofthe following has the strongest Bleaching property?
Answer: Chlorine
9. Theproperty of a substance to absorb moisture from the air on exposure is called–
Answer: Deliquescene
10. CausticSoda is —
Answer: NaOH
11. Nitricacid does not react with-
Answer: Gold
12. Brassgets discoloured in air due to the presence of which gas in air–
Answer: HydrogenSulphide
13. Which ofthe following is not a bleaching agent?
Answer: Carbon dioxide
14. Oxygenis manufactured by the fractional Evaporation of-
Answer: Liquidair
15. Quartzcrystals normally used in quartz clocks etc. is chemically–
Answer: Silicondioxide
16. The gasusually filled in electric bulb is —
Answer: Nitrogen
17. Sodiumburns in air to give-
Answer: Sodium
18. Which ofthe following elements is non-radioactive?
Answer: Zirconium
19. Heavywater is —
Answer: Deuteriumoxide
20. Argongas was discovered by-
Answer: William
21. Most soluble in water is —
Answer: Sugar
22. One fathom is equal to–
Answer: 6 feet
23. According to Dalton’s atomic theory the smallest particle which can existindependently is–
Answer: Anatom
24. Thegases used in different types of welding would include —
Answer: Oxygen&
25. Formaldehydeis the starting material for The manufacture of-
Answer: Bakelite
26. Therecent atomic weight scale is based on–
Answer: 6C12
27. Which ofthe following alloys is used for making magnets ?
Answer: Alnico
28. Thephenomenon of “metamerism” is Shown by-
Answer: Methylpropylether and diethyl
29. Themajor ingredient of leather is–
Answer: Collagen
30. Chemically, vitamin C is __?
Answer: Sandand silicates
31. Which ofthe following can be used as an anaesthetic?
Answer: Nitrousoxide
32. Which ofthe following is not an ore of Aluminium?
Answer: Azurite
33. Epoxyresins is used as–
Answer: Vinegar
34. Mostsoluble in water is —
Answer: Sugar
35. Onefathom is equal to–
Answer: 6feet
36. An icecube is floating on the surface of water. How will the water level be affected by melting of this ice cube ?
Answer: Waterlevel will remain the same
37. Bromineis —
Answer: Ared liquid.
38. What isthe unit for measuring the pitch or frequency of sound ?
Answer: Decible
39. Whomeasured the charge of an electron at first?
Answer: RobertAndrews Millikan
40. The metalused in storage batteries —
Answer: Lead
41. Thefastest acting enzyme in the biological kingdom is–
Answer: carbonicanhydrase
42. Water hasmaximum density at —
Answer: –4°C
43. Lightening cause rainfall because–
Answer: It activate H2O molecule
44. Which oneof the following is also called Stranger Gas?
Answer: Xenon
45. Thechemial name of Uria is —
Answer: Carbamide
46. Nitrification means–
Answer: Convertthe atmospheric nitrogen to effective nitrogen compound.
47. Permanenthardness of water can be removed by adding —
Answer: WashingSoda
48. Thealcohol used in power alcohol is
Answer: alcohol
49. Cellmembrane is–
Answer: semipermeable
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