113 Science MCQ Questions in english

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113 Science MCQ Questions in english हिन्दी

Read science multiple choice questions for the various types of competitive exams. These science questions will help students to prepare for their exams. Improve your Science subject knowledge by reading these science questions.

57. Water's enduring hardness can be eliminated by adding:

A. Bleaching Powder

B. Potassium Permanganate

C. Chlorine

D. Washing Soda

56. A Marsh gas

A. Ethane

B. Hydrogen

C. Methane

D. Nitrogen

55. Which of the following describes gun metal's constituent parts?

A. Copper, Tin and Zinc

B. Iron, Zinc and Titanium

C. Iron, Brass and Tin

D. Iron and Tin

54. What material is used to make radium?a) Limestone

A. Limestone

B. Rutile

C. Haematite

D. Pitchblende

53. Describe laughing gas

A. Sulphur dioxide

B. Hydrogen peroxide

C. Nitrous Oxide

D. Carbon monoxide

52. The elements with atomic numbers starting with actinides are

A. 101 to 115

B. 89 to 103

C. 36 from 43

D. 97 to 104

51. The following two substances are typically used to create transistors:

A. Silicon and Germanium

B. Iridium and Tungsten

C. Niobium and Columbium

D. Boron and Aluminium

50. The most significant aluminium ore is

A. Calcite

B. Galena

C. Bauxite

D. Calamine

49. What is most soluble in water?

A. Sugar

B. Camphor

C. Sulphur

D. Common salt

48. Which of the following was the first to be found in the sun's chromospheres?

A. Neon

B. Krypton

C. Helium

D. Xenon

47. Which of the following is liquid when the temperature is ambient?

A. Sodium

B. Francium

C. Cerium

D. Lithium

46. The metal sodium is stored under:

A. Water

B. Alcohol

C. Kerosene

D. Petrol

45. The mineral monazite is a

A. Zirconium

B. Thorium

C. Titanium

D. Iron

44. Together, carbon, diamond, and graphite are known as:

A. Isomorphs

B. Isotopes

C. Isomers

D. Allotrope

43. Uses for potassium nitrate include

A. Fertilizer

B. Salt

C. Glass

D. Medicine

42. Water's enduring hardness can be reduced by adding:

A. Lime

B. Sodium Carbonate

C. Potassium Permanganate

D. Alum

41. soda water includes

A. Sulphuric acid

B. Carbon dioxide

C. Carbonic acid

D. Nitrous acid

40. Heavy water is defined as:

A. Rain water

B. Deuterium oxide

C. PH7

D. Tritium oxide

39. The group of metals Fe, Co, and Ni is best known as:

A. Main group metals

B. Alkali metals

C. Transition metals

D. Rare metals

38. The chemical (Ethyl Mercaptan) added to otherwise odourless LPG cooking gas to give it a perceptible odour is a compound of:

A. Chlorine

B. Bromine

C. Sulphur

D. Fluorine

37. The element that all acids share is

A. Oxygen

B. Sulphur

C. Hydrogen

D. Carbon

36. Cooking utensils that are nonstick are coated with

A. Teflon

B. Black paint

C. Polystyrene

D. PVC

35. Silicon carbide is used in which of the following activities?

A. Disinfecting water of ponds

B. Cutting very hard substances

C. Making cement and glass

D. Making casts for statues

34. What is the approximate salinity of seawater?

A. 2.5%

B. 3%

C. 3.5%

D. 2%

33. Iron oxide is created when an iron nail rusts.

A. With decrease in the weight of the nail

B. Without any change in the weight of the nail

C. Without any change in colour or weight of the nail

D. With increase in the weight of the nail

32. The coating on galvanized iron sheets is

A. Chromium

B. Zinc

C. Tin

D. Lead

31. Among the different carbon allotropes

A. Diamond is the hardest, graphite is the softest

B. Diamond is the hardest, lamp black is the softest

C. Coke is the hardest, graphite is the softest

D. Diamond is the hardest, coke is the softest

30. Which of the following work as lubricant?

A. Iron Oxide

B. Diamond

C. Silica

D. Graphite

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