BSEB Class 10th Science Viral Question 2023

BSEB Class 10th Science Viral Question 2023:- For Bihar Board Matriculation Examination 2023, 80 important science questions have been given here which are first and second. Will be asked in shift, as you all know that from February 17, the matriculation annual examination has started in Bihar, on February 18, the examination of science will be taken by the Bihar Board.

BSEB Class 10th Science Viral Question 2023

1. What is the speed of light in vacuum?

(A) 3 x 108 cm / sec

(B) 3 x 108 km / sec

(C) 3 x 108 m / sec

(D) none

Years ⇒ C

2. Which mirror is suitable for shaving It happens ?

(A) flat

(B) convex

(C) concave

(D) none of these

Years ⇒ C

3. What is the focal length of a spherical mirror to its radius of curvature?

(A) is half

(B) doubles

(C) triples

(D) is fourth

Ans ⇒ A

4. Which is used as a side mirror?

(A) Convex Mirror

(B) Concave Mirror

(C) both

(D) none of these

Ans ⇒ A

5. The focal length of a convex lens is 20 cm, then the power of the lens will be

(A) + 0.5 diopter

(B) – 0.5 diopter

(C) + 5 diopters

(D) – 5 diopters

Years ⇒ C

6. It takes place according to Snell’s law.

(A) µ = sin i / sin r

(B) µ = sin i + sin r

(C) µ = sin i – sin r

(D) none of these

Ans ⇒ A

7. When a ray of light travels from one medium to another, it deviates from its former path.

(A) refraction of light

(B) reflectors of light

(C) dispersion of light

(D) none of these

Ans ⇒ A

8. Which mirror is used by the dentist to measure the teeth of the patients? To see the reflection?

(A) plane mirror

(B) concave mirror

(C) convex mirror

(D) all of these

Ans ⇒ B

9. How many protons make up a coulomb of electric charge?

(A) 1.6 x 10–19

(B) 1.6 x 1019

(C) 6.25 x 1018

(D) 6.25 × 10–18

Ans ⇒ B

10. On what effect of electric current does an electric fuse work?

(A) thermal

(B) Magnetic

(C) Chemical

(D) none of these

Ans ⇒ A

11. Current in the circuit at the time of short circuit value of

(A) becomes very less

(B) does not change

(C) changes a lot

(D) varies continuously

Years ⇒ C

12. Which of the following gas is responsible for global warming?

(A) N2

(B) CO2

(C) O2


Ans ⇒ B

13. Which lens is also called diverging lens?

(A) concave lens

(B) convex lens

(C) both concave and convex lens

(D) none of these

Ans ⇒ A

Original Viral Question 2023 of Matric Exam Science

14. Who controls the size of the pupil?

(A) Even the eyelids

(B) Iris

(C) Eye lens

(D) retina

Years ⇒ D

15. The frequency of alternating current produced in India is

(A) 50Hz

(B) 60Hz

(C) 70 Hz

(D) 80 Hz

Ans ⇒ A

16. The neutral wire in a domestic electrical circuit has a color

(A) red

(B) Green

(C) Black

(D) yellow

Years ⇒ C

17. The main component of LPG is

(A) normal petane and isopentane

(B) normal butane and isobutane

(C) Methane and Ethane

(D) none of these

Ans ⇒ B

18. Zn + CuSO4 → ZnSO4 What type of chemical reaction is +Cu?

(A) Combination reaction

(B) displacement reaction

(C) double displacement reaction

(D) decomposition reaction

Ans ⇒ B

19. What type of chemical reaction is respiration?

(A) oxidation

(B) Combination

(C) exothermic

(D) endotherm

Years ⇒ C

20. The reaction between an acid and a base leads to the formation of salt and water. this reaction is called

(A) Combination

(B) decomposition

(C) neutralization

(D) reduction

Years ⇒ C

21. In the presence of moist air, new articles of iron rust after some time, this process is called?

(A) reduction

(B) Corrosion

(C) neutralization

(D) decomposition

Ans ⇒ B

22. What is the chemical formula of marble?

(A) CaCO3

(B) MgCO3

(C) Ca(HCO3)2

(D) Mg(HCO3)2

Ans ⇒ A

23. Litmus solution is a violet pigment which is extracted from

(A) Lichen

(B) Red Cabbage

(C) Turmeric

(D) petunia flower

Ans ⇒ A

BSEB Class 10th Science Viral Question 2023 PDF Download

24. A substance useful for making water free from bacteria is.

(A) Washing soda

(B) Baking powder

(C) Alum

(D) bleaching powder

Years ⇒ D

25. Milk of Magnesia means [Mg (OH)2] The aqueous solution of is used as the following.

(A) Atacid

(B) Analgesic

(C) Antibiotic

(D) antiseptic

Ans ⇒ A

26. Stainless stein alloy is

(A) Iron

(B) copper

(C) Aluminum

(D) Teen

Ans ⇒ A

27. Whose ore is cinnavar?

(A) Copper

(B) mercury

(C) Sulfur

(D) Silicon

Ans ⇒ B

28. The functional radical of ethanol is


(B)> CO

(C) —OH


Years ⇒ C

29. Calcium corvite reacts with water to give

(A) alkane

(B) Athene

(C) Ethene

(D) ethene

Years ⇒ D

30. The vertical columns of the periodic table are called

(A) class

(B) period

(C) allotropes

(D) none of these

Ans ⇒ A

31. Which of the following is the natural source of oxalic acid?

(A) Orange

(B) Tomato

(C) Vinegar

(D) Tamarind

Ans ⇒ B

32. On heating which chemical compound can be obtained ‘Plaster of Paris’?

(A) bleaching powder

(B) Gypsum

(C) Limestone

(D) raw lime

Ans ⇒ B

33. The IUPAC name of acetic acid is

(A) Methanoic acid

(B) propanoic acid

(C) ethanoic acid

(D) Tartaric acid

Years ⇒ C

34. The brain is responsible

(A) to think

(B) heartbeat

(C) to balance the body

(D) all of these

Years ⇒ D

35. 1 kWh is equal to

(A) 3600 J

(B) 3.6 x 106 J’s

(C) 36 x 106 J’s

(D) 36.00 J का

Ans ⇒ B

matric Pariksha 2023 science viral question

36. Normal blood pressure of human body is

(A) 120/80

(B) 80/120

(C) 120/180

(D) 100/80

Ans ⇒ A

37. A disease caused due to deficiency of iron in the blood.

(A) TV

(B) Honeymoon

(C) Anemia

(D) Hypertension

Years ⇒ C

38. The hormone secreted by testis is called

(A) Testosterone

(B) Progesterone

(C) Estrogen

(D) Prolevtine

Ans ⇒ A

39. Which is called the master gland?

(A) Pituitary gland

(B) From the uterus

(C) In the duct

(D) From the ovary

Ans ⇒ A

40. The outer membrane of the brain is called

(A) pimeter

(B) Durometer

(C) Aralnaid

(D) none of these

Ans ⇒ B

41. Which is not a sexually transmitted disease


(B) Gonorrhea

(C) Syphilis

(D) Typhoid

Years ⇒ D

42. Sex determines in man

(A) Autosome

(B) sex chromosome

(C) both (A) and (B)

(D) any of these No

Ans ⇒ B

43. Who introduced the term ‘gene’

(A) Mendel

(B) Darbin

(C) Johnson

(D) Lamarck

Years ⇒ C

44. Name the scientist who developed the theory of evolution. had rendered

(A) Lamarck

(B) Mendel

(C) Darwin

(D) Aristotle

Years ⇒ C

45. Who is mainly responsible for the depletion of ozone layer?


(B) SO2


(D) NOT2

Years ⇒ C

46. ​​Amrita Devi Visoi Award is given in which field?

(A) Sports

(B) Education

(C) Bio-conservation

(D) all

Years ⇒ C

47. The value of current in the circuit at the time of short circuit

(A) becomes very less

(B) does not change

(C) increases very much

(D) varies continuously

Years ⇒ C

48. Blood from the heart is pumped throughout the body

(A) by lungs

(B) by ventricles

(C) by atria

(D) all of them

Ans ⇒ B

49. Who protects the spinal cord?

(A) skull

(B) spinal cord

(C) Ribs

(D) none of these

Ans ⇒ B

50. How many types of nerve cells are there?

(A) 1

(B) 2

(C) 3

(D) 4

Years ⇒ C

51. Anther is found in

(A) Ovaries

(B) Pollen grains

(C) fiber

(D) none of these

Years ⇒ C

52. Male reproductive organ of flower is

(A) Kesar

(B) pistil

(C) stigma

(D) none of these

Ans ⇒ A

53. Where is the body temperature controlled?

(A) Pineal gland

(B) Thymus gland

(C) Hypothalamus

(D) all of these

Years ⇒ C

Bihar board class 10th science ka viral prashn 2023

54. Which reproduction method does Plasmodium adopt?

(A) Denial

(B) fragmentation

(C) Mukulan

(D) vegetative propagation

Ans ⇒ B

55. In which part of the stamen are pollen grains?

(A) fiber

(B) anther

(C) stigma

(D) Ovaries

Ans ⇒ B

56. Which part of flower turns into fruit?

(A) Ovaries

(B) stamens

(C) Strikeshar

(D) Seeds

Ans ⇒ A

57. Who propounded the law of inheritance of traits in humans?

(A) Darwin

(B) Lamarck

(C) Mendel

(D) Spencer

Years ⇒ C

58. Where is the egg fertilized?

(A) in the vagina

(B) in the uterus

(C) in the ovary

(D) in the oviduct

Years ⇒ D

59. The number of chromosomes in a human cell is

(A) 21 pairs

(B) 22 pairs

(C) 23 pairs

(D) 24 pairs

Years ⇒ C

60. Which breeding method does Spirogyra adopt?

(A) fragmentation

(B) Denial

(C) emergence

(D) vegetative propagation

Years ⇒ C

61. The atomic number of sodium (Na) is

(A) 18

(B) 11

(C) 13

(D) 16

Ans ⇒ B

62. Which organic substance is present in LPG?

(A) Butane

(B) ethane

(C) Propane

(D) none of these

Ans ⇒ A

63. What is an inert element?

(A) Carbon

(B) Helium

(C) gold

(D) Hydrogen

Ans ⇒ B

64. Which carboxylic acid group?



(C) —CO

(D) — SMALL2

Ans ⇒ B

65. The molecular formula of wengein is

(A) CH4

(B) C2H2

(C) C6H4

(D) C2H4

Years ⇒ C

66. The molecular formula of sulfuric acid is

(A) H2SO3

(B) H2SO4

(C) H2 S2O3

(D) H2S2O8

Ans ⇒ B

67. What is the valency of caravan

(A) 6

(B) 6

(C) 8

(D) 11

Ans ⇒ B

BSEB Class 10th Science Viral Question 2023 original

68. How many periods are there in the modern periodic table?

(A) 7

(B) 6

(C) 8

(D) 5

Ans ⇒ A

69. What is the classified group of three elements of Dowareine called?

(A) Triac

(B) octaves

(C) both

(D) none of these

Ans ⇒ A

70. What type of element is helium?

(A) inert

(B) Active

(C) active

(D) indifferent

Ans ⇒ A

71. kwh (kilowatt hour) unit is

(A) of power

(B) of the potential difference

(C) resistivity

(D) Energy

Years ⇒ D

72.1K watt is

(A) 10 watt

(B) 100 watt

(C) 1000 watt

(D) 10000 watt

Years ⇒ C

73. The unit of magnetic field is

(A) Ampere

(B) Wait

(C) Volt

(D) Teyla

Years ⇒ D

74. Proposition of the Right-Hand Rule of Thumb did

(A) Ousted

(B) Newton

(C) Maxwell

(D) Faraday

Years ⇒ C

75. Who discovered electromagnetism?

(A) Maxwell

(B) Faraday

(C) Newton

(D) Fleming

Ans ⇒ B

76. Fleming’s right hand rule applies

(A) in the motor

(B) in an electric generator

(C) electromagnet

(D) none of these

Ans ⇒ A

77. The frequency of alternating current (ac) in India is

(A) 30 Hz

(B) 40Hz

(C) 50Hz

(D) 60 Hz

Years ⇒ C

78. Which direction does the thumb indicate in Fleming’s left hand rule?

(A) direction of force

(B) the direction of the magnetic field

(C) direction of current

(D) none of these

Years ⇒ C

79. Fleming’s right hand rule applies.

(A) in the motor

(B) in an electric generator

(C) electromagnet

(D) none of these

Ans ⇒ B

80. Fleming’s left-hand rule applies

(A) in the motor

(B) in an electric generator

(C) electromagnet

(D) none of these

Ans ⇒ A

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