Bihar Board Class 10 · Science · Matric exam 2027
Bihar Board Class 10 Science Model Paper 2022
The board’s 2022 model paper — all 110 questions as printed. Each question names its chapter, where that chapter’s most-asked questions are.
Full marks 80 · Time 2 h 45 min
Section A · Objective questions (80)
Where are the reproductive organs found in plants?
- (A) in root
- (B) in flower
- (C) in stem
- (D) in fruit
The process of photosynthesis takes place in -
- (A) animal
- (B) fungus
- (C) parasite
- (D) green plants
From which oxygen comes out during the process of photosynthesis?
- (A) Water
- (B) glucose
- (C) CO2
- (D) dictyosomes
Where are the gastric glands found in?
- (A) Liver
- (B) Stomach
- (C) Pancreas
- (D) Mouth
The process of glycolysis takes place in -
- (A) Stomata
- (B) Nucleus
- (C) Mitochondria
- (D) Cytoplasm
Ethyl alcohol is made from which type of respiration?
- (A) Aerobic
- (B) Anaerobic
- (C) Both A and B
- (D) None of these
Which is the smallest endocrine gland?
- (A) Adrenal
- (B) Pituitary
- (C) Medulla
- (D) Thyroid
The process of loss of water from the aerial parts of the plant is called -
- (A) Diffusion
- (B) Transpiration
- (C) Pollination
- (D) Fertilization
Goiter disease develops from
- (A) Blood loss
- (B) Due to lack of sugar
- (C) Iodine deficiency
- (D) Obesity
Light yellow colored sticky substance in the blood is called -
- (A) Plasma
- (B) Lymph
- (C) Serum
- (D) WBC
The device for measuring blood pressure is called -
- (A) Stethoscope
- (B) Ammeter
- (C) Lactometer
- (D) Sphygmomanometer
Transpiration is found in
- (A) Animals
- (B) Plants
- (C) Both plants and animals
- (D) None of these
Open circulatory system is found in which of the following?
- (A) Camel
- (B) Horse
- (C) Cockroach
- (D) Human
What is blood?
- (A) Matter
- (B) Tissue
- (C) Cell
- (D) None of these
Which pigment causes the yellow colour of urine?
- (A) Leucoplast
- (B) Chloroplasts
- (C) Urochrome
- (D) Chromoplasts
Which of the following is a hermaphrodite animal?
- (A) Elephant
- (B) Cow
- (C) Dog
- (D) Earthworm
Where does urea enter the blood from?
- (A) Kidney
- (B) Lungs
- (C) Liver
- (D) None of these
It is a chemical showing biomagnifications -
- (A) CFC
- (B) DDT
- (C) ATP
- (D) None of these
Which one of the followings is a Primary consumer?
- (A) Decomposer
- (B) Herbivores
- (C) Carnivores
- (D) Omnivores
Which of the following is an example of 'underground water'?
- (A) Well
- (B) River
- (C) Sea
- (D) Pond
The development of organism by natural selection is called -
- (A) Mendelism
- (B) Lamarkism
- (C) Darwinism
- (D) Micro-evolution
Green plants are called -
- (A) Consumer
- (B) Decomposer
- (C) Producer
- (D) None of these
The cause of ovulation is -
- (A) LH
- (B) Estrogen
Where are the islets of langerhans found in ?
- (A) Ovary
- (B) Stomach
- (C) Pancreas
- (D) Kidney
Which of the following is necessary in the synthesis of thyroxine hormone?
- (A) Iron
- (B) Manganese
- (C) Chlorine
- (D) Iodine
Nissl's granules are found in
- (A) Nephron
- (B) Nucleus
- (C) Neuron
- (D) None of these
The weight of human brain is -
- (A) 1.5 - 2.0 Kg
- (B) 0.5-1.5 Kg
- (C) 1.2-1.4 Kg
- (D) None of these
The image formed by remedial lens in short-sightedness or far sightedness is
- (A) Real, erect
- (B) Virtual, erect
- (C) Virtual, inverted
- (D) Real, inverted
Which of the following is used as a side mirror?
- (A) Convex mirror
- (B) Concave mirror
- (C) Concave lens
- (D) Convex lens
The image obtained by a Concave lens is -
- (A) Virtual
- (B) erect
- (C) diminished
- (D) all of these
The S.I. unit of energy is
- (A) Joule
- (B) Joule/Sec.
- (C) Joule/Sec^2
- (D) None of these
The blue colour of the sky is the result of which phenomenon?
- (A) Refraction
- (B) Scattering
- (C) Reflection
- (D) None of these
The least distance of distinct vision for a normal eye is -
- (A) 25 m
- (B) 2.5 cm
- (C) 25 cm
- (D) 2.5 m
The focal length of Convex lens is 50 cm, It's power will be -
- (A) +5D
- (B) -5D
- (C) -2D
- (D) + 2D
A prism is surrounded by how many surfaces?
- (A) Two
- (B) Three
- (C) Four
- (D) Five
The focal length of the eye lens is changed by -
- (A) Pupil
- (B) Iris
- (C) Retina
- (D) Ciliary muscles
How many laws of reflection of light are?
- (A) 1
- (B) 2
- (C) 3
- (D) 4
The objective of a photography camera is
- (A) Convex lens
- (B) Concave lens
- (C) Convex mirror
- (D) Concave mirror
If a ray is incident normally to the surface of a concave mirror, through which point will it pass after reflection?
- (A) From focus
- (B) From Centre of Curvature
- (C) From pole
- (D) None of these
If a monochromatic ray passes through a prism, it will not suffer -
- (A) refraction
- (B) dispersion
- (C) deviation
- (D) none of these
In a wind electric generator, the coil is rotated basically by
- (A) at high pressure of Air
- (B) air at rest
- (C) air in motion
- (D) none of these
The power of a Concave lens of a glass in air is
- (A) negative
- (B) positive
- (C) Sometimes positive
- (D) none of these
Which one of the following is a good conductor of electricity?
- (A) Iodine
- (B) Graphite
- (C) Sulphur
- (D) Diamond
The focal length of a concave mirror having radius of curvature 1m is -
- (A) 50 mm
- (B) 50 cm
- (C) 50 m
- (D) None of these
A ray passing from denser to rarer medium deviates
- (A) away from normal
- (B) to coincide with the normal
- (C) towards the normal
- (D) none of these
The device used to produce electric current is -
- (A) Generator
- (B) Motor
- (C) Ammeter
- (D) Galvanometer
The conventional source of energy is -
- (A) Wind energy
- (B) Solar energy
- (C) Coal
- (D) Biogas
A white ray is incident obliquely on a glass slab with the first refraction. Which of the following will also occur?
- (A) Deviation
- (B) Dispersion
- (C) Reflection
- (D) All of these
The electricity supplied to our houses is -
- (A) 220 v direct current
- (B) 12 v direct current
- (C) 220 v alternating
- (D) 12 v alternating current
The atomic number of zinc is -
- (A) 24
- (B) 28
- (C) 29
- (D) 30
What is the chemical formula of washing soda ?
- (A) Na2CO3.10H2O
- (B) Na2CO3.7H2O
- (C) Na2CO3.5H2O
- (D) Na2CO3.H2O
Which one of the following is the strongest base?
- (A) Mg(OH)2
- (B) NH4OH
- (C) NaOH
- (D) Cu(OH)2
Haematite is an ore of which of the following metals ?
- (A) Zn
- (B) Fe
- (C) Cu
- (D) Au
The sulphide ore is concentrated by which of the following process?
- (A) Liquation
- (B) Hand picking
- (C) Calcination
- (D) Froth-floatation process
The reaction, 2Zn + O2 -> 2ZnO is which type of reaction.
- (A) Oxidation
- (B) Displacement
- (C) Neutralisation
- (D) Decomposition
The Molecular Formula of Glucose is
- (A) C2H5OH
- (B) C6H12O6
- (C) H2SO4
- (D) C5H15N7
The aqueous solution of an acid conducts electricity because an acid is
- (A) soluble in water
- (B) insoluble in water
- (C) ionized in water
- (D) none of these
How many electrons are there in the outermost shell of lithium?
- (A) 1
- (B) 2
- (C) 3
- (D) 4
The element of zero group of the Periodic Table is -
- (A) Cl
- (B) H
- (C) He
- (D) Na
Which one of the following is the most electronegative element?
- (A) F
- (B) K
- (C) I
- (D) Na
Which gas is deposited on Cathode in the electrolysis of water?
- (A) Oxygen
- (B) Ozone
- (C) Hydrogen
- (D) None of these
What is the pH value of our body?
- (A) 2-3
- (B) 5-7
- (C) 7.0 - 7.8
- (D) 9.1 - 9.5
Which one of the following compounds is an acid?
- (A) Na2O
- (B) CuO
- (C) Ca(OH)2
- (D) H2SO4
Which of the following is Synthetic Indicator?
- (A) Turmeric
- (B) Litmus Paper
- (C) Methyl Orange
- (D) Red Cabbage
Carbon dioxide reacts with water to form -
- (A) Sulphuric acid
- (B) Carbolic acid
- (C) Carbonic acid
- (D) Hydrochloric acid
The chemical composition of Copper pyrite is -
- (A) Cu2FeS
- (B) CuFeS2
- (C) CuFe2S
- (D) Cu2FeS2
A metal found in the Free State in nature is -
- (A) Zinc
- (B) Gold
- (C) Iron
- (D) Copper
Which of the following metals is the most reactive?
- (A) Zn
- (B) Ag
- (C) Au
- (D) Cu
The number of electrons in the outermost shell of non-metal can be -
- (A) 3, 4, 5 or 6
- (B) 4, 5, 6 or 7
- (C) 1, 2, 3 or 4
- (D) 2, 3, 4 or 5
Brass is an alloy of which of the following?
- (A) Cu + Zn
- (B) Fe + Ni
- (C) Cu + Au
- (D) Cu + Sn
Which of the following are isomers?
- (A) Methyl alcohol and dimethyl ether
- (B) Acetone and Acetaldehyde
- (C) Ethyl alcohol and dimethyl ether
- (D) Ethene and Ethyne
The name of CH3 - O - C2H5 according to IUPAC system is -
- (A) Methoxyethane
- (B) Propoxymethane
- (C) Ethorymethane
- (D) Ethylmethyl ether
Which oxide of iron is formed when iron is treated with steam?
- (A) Fe3O4
- (B) Fe3O2
- (C) Fe2O3
- (D) FeO
The atomic number of an element is 16. What is the group number of this element in periodic Table?
- (A) 15
- (B) 2
- (C) 16
- (D) 4
Which of the following metals does not react with dilute sulphuric acid?
- (A) Zn
- (B) Fe
- (C) Cu
- (D) Mg
An alloy contains 90% Cu and 10% Sn The name of this alloy is
- (A) Solder
- (B) Bronze
- (C) Brass
- (D) German Silver
Zinc reacts with sodium hydroxide to form -
- (A) H2 gas
- (B) O2 gas
- (C) both H2 and O2 gas
- (D) ZnO
Which of the following metals does not combine with oxygen even when heated at high temperature in air.
- (A) Al
- (B) Cu
- (C) Ag
- (D) Hg
The impurities present in an ore are called.
- (A) minerals
- (B) slag
- (C) gangue
- (D) none of these
Due to which of the following properties of metal, wires are made?
- (A) malleability
- (B) thermal conductivity
- (C) ductility
- (D) hardness
Section B · Written questions (30)
On which factors do the resistance of a conductor depend?
What is nonrenewable source of energy? Give any two examples.
Distinguish between a convex lens and a concave lens.
What is a simple microscope? Draw its ray diagram.
What is the principle of electric motor ?
Explain the uses of ammeter and voltmeter.
What is meant by power of accommodation of the eye?
What is geothermal energy?
Establish the relation 1/v - 1/u = 1/f for a convex lens.
Explain how water energy can be converted into electrical energy. Also write two benefits of water energy.
Name any two industries based on forest resources.
Draw the electric dot structure of the following. (i) H2S (ii) F2
Identity the substances oxidized and reduced in the following reactions. (iii) 4Na(s) + O2 -> 2Na2O(s) (iv) CuO(s) + H2(g) -> Cu(s) + H2O(aq)
What do you mean by precipitation reaction? Explain with an example.
What is single displacement reaction?
Which gas is filled in the bag of chips, and why?
What is bleaching powder? Write its chemical name, formula and uses?
What are differences between calcinations and roasting?
जस्ता के मुख्य अयस्क का नाम लिखें। जस्ता का उसके अयस्क से निष्कर्षण के सिद्धांत का वर्णन करें।
हाइड्रोजनीकरण अभिक्रिया क्या है ? इस अभिक्रिया का एक व्यापारिक उपयोग बताएँ ।
प्रकाशानुवर्तन क्या है ?
पोषण की परिभाषा दें ।
गुणों का संचरण एक से दूसरी पीढ़ी में कैसे होता है ?
रक्त प्लेटलेट्स की रक्त जमने में क्या भूमिका है ?
आनुवंशिक गुण से आप क्या समझते हैं ?
परितंत्र में अपमार्जकों की क्या भूमिका होती है ?
ओजोन परत के क्षय का कारण लिखें ।
मानव मूत्र के अवयवों की प्रतिशत मात्रा क्या है ?
लाल रक्त कोशिका तथा श्वेत रक्त कोशिका में अंतर बताइए ।
उत्तक-संवर्धन (tissue culture) क्या है? यह कैसे सम्पन्न होता है?
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