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# Board Paper of Class 10 2014 Science - Solutions

(PART – A)
General Instructions:
(i) There are 50 objective type (MCQ) questions is Part - A and all the questions are compulsory.
(ii) The questions are serially numbered from 1 to 50 and each carries 1 mark.
(iii) Read each question, carefully, select proper alternative and answer in the O.M.R. sheet.
(iv) The OMR sheet is given for answering the questions. The answer of each question is represented by (A) , (B) , (C) , (D) Darken the circle of the correct answer with ball-pen.
(v) Set No. Of Question Paper printed on the upper-most right side of the Question Paper is to be written in the column provided in the OMR sheet.

(PART – B)
General Instructions:
1) Write in clear hand writing.
2) There are four sections in part –B of the question paper and total 1 to 18 questions are there.
3) All the questions are compulsory. Internal options are given.
4) The numbers at right side represent the marks of the questions.
5) Start new section on new page.
6) Maintain sequence.

SECTION-A
Questions from 51 to 55 are short answer type of questions. Write an answer to each using maximum 30 words. Each question carries 2 marks.
SECTION-B
Questions from 56 to 60 are short answer type of questions. Use maximum 30 words to answer them. Each question carries 2 marks.
SECTION-C
Questions from 61 to 65 are short answer type of question. Write an answer to each using maximum 50 words. Each question carries 3 marks.
SECTION-D
Question numbers 66 to 68 are to be answered in detail using nearly 100 words. Each question carries 5 marks.
• Question 1
Which of the following alternative shows the correct path of oxygenated blood flow in human beings?

(a) Different organs --- Right atrium --- Right ventricle --- Pulmonary artery --- lungs

(b) Lungs --- Pulmonary artery --- left atrium --- left ventricle --- different organs

(c) Lungs --- Pulmonary vein --- left atrium --- left ventricle --- different organs

(d) Lungs --- Pulmonary artery --- Right atrium --- Right ventricle --- different organs VIEW SOLUTION
• Question 2
Which of the following statement is wrong for arteries?

(a) Arteries carry blood from heart to different organs

(b) All arteries carry pure blood

(c) Blood flows in arteries under high pressure

(d) Arteries have thick & elastic walls VIEW SOLUTION
• Question 3
In plants, photosynthetic products are transported through _________________.

(a) sieve cells

(b) sieve cells and companion cell

(c) Sieve tubes and companion cell

(d) Sieve tubes and sieve cells VIEW SOLUTION
• Question 4
When we say a nephron is the structural and functional unit of the kidneys, we mean that _____________.
(P) The kidney is made up of many nephrons
(Q) The filtration of blood that occurs in the kidneys is because of what the nephrons do
(R) Urea formation occurs in the nephrons

(a) Only P and Q

(b) Only Q and R

(c) Only P and R

(d) P, Q and R VIEW SOLUTION
• Question 5
Compared to other animals, the ability of speech has developed more in humans.
Mainly, development of which organ is responsible for this?

(a) Mouth

(b) Heart

(c) Tongue

(d) Brain VIEW SOLUTION
• Question 6
There is a Mimosa plant grown in one of the pot in the garden. It’s leaves get ‘folded up’ on touching it. What is this behaviour called in scientific language?

(a) Photonesty

(b) Hydronesy

(c) Thermonesty

(d) Thigmonesty VIEW SOLUTION
• Question 7
Some organisms and their type of reproductions are given below. Find the correct alternative showing the correct pair.
 (a) Paramoecium (1) Spore formation (b) Hydra (2) Budding (c) Mucor (3) Fission (d) Spirogyra (4) Fragmentation

(a) a – 1, b – 2, c – 3, d – 4

(b) a – 3, b – 4, c – 2, d – 1

(c) a – 2, b – 3, c – 4, d – 1

(d) a – 3, b – 2, c – 1, d – 4 VIEW SOLUTION
• Question 8
Statement X: Disease, AIDS destroys immunity of the body.
Statement Y: Gonorrhea and Syphilis are sexually transmitted diseases caused only in males.
Which one of the following alternatives is correct regarding statement X and Y?

(a) Both X and Y are true.

(b) Statement X is true but Y is wrong

(c) Both X and Y are wrong.

(d) Statement X is wrong but Y is true VIEW SOLUTION
• Question 9
Study following statements and choose the correct alternative.
(P) Those organs which have the same internal structure but different functions, are called homologous organs.
(Q) Organs which have different basic design but have similar appearance and carry out similar functions are called analogous organs.
(R) The impressions of dead plants or animals that lived in the past are known fossils.

(a) All the three (P, Q, R) statements are true.

(b) Statements P and Q arc true but R is false

(c) Only R is true

(d) All three statements are wrong. VIEW SOLUTION
• Question 10
Which of the following statement is true for variation in organisms?
(P) The occurrence of differences among the individuals of the same species is known as variation.
(Q) Variations decrease the possibilities of survival.
(R) The process of evolution decreases the variation in organisms.
(S) During meiosis, crossing over takes place between the genes and hence, combinations are formed, which ultimately results in producing variations.

(a) (P) and (S)

(b) (Q) and (S)

(c) (P) and (R)

(d) (Q) and (P) VIEW SOLUTION
• Question 11
Which of the following statement is wrong in case of a food chain?

(a) The one, which are not producers, are consumers.

(b) More energy is available at lower trophic levels.

(c) Decomposers can derive their food from all other nutritional substances except producers.

(d) One organism may be associated with more than one food chain. VIEW SOLUTION
• Question 12
In a food chain, deer is eaten by lion and deer eats vegetation. Which one of the statements given is true?
(P) Lion is second order consumer and deer is first order consumer.
(Q) Lion is predator and deer is prey.
(R) Lion is first order consumer and deer is second order consumer.
(S) Lion is third order consumer and deer is second order consumer.

(a) Only (P) and (Q)

(b) Only (Q) and (R)

(c) Only (P) and (S)

(d) Only (P) and (R) VIEW SOLUTION
• Question 13
One boy goes to school on his vehicle. On the way, he reaches to a cross-road where red signal is shown. He turns off his vehicle until green signal appears. From this, he has used which R to save the environment.

(a) Reduce

(b) Recycle

(c) Reuse

(d) None of the given VIEW SOLUTION
• Question 14
With increase in population, our needs have increased. Today the world is facing a problem of energy crisis. We must conserve energy. Which one of the following statements do not show energy conservation approach?

(a) Switch off the lights, fans, television and other appliances when not in use.

(b) One should use individual vehicle instead of public transport system.

(c) Make use of pressure cooker.

(d) Use of bicycle while going to school. VIEW SOLUTION
• Question 15
Which of the following statement is true in case of carbon nano-tube?

(a) Compressive strength is more compared to its tensile strength.

(b) Tensile strength of carbon nanotube is very less compared to that of steel.

(c) Under excessive tensile strain, it does not show permanent deformation.

(d) Carbon nanotubes can be bent like a rubber-tube. VIEW SOLUTION
• Question 16
Microscopes are used to see extremely minute things which cannot be seen by our naked eyes. These are some of the microscopes that are invented.
(P) Optical Microscope
(Q) Scanning 'funnelling Microscope
(R) Atomic Force Microscope

Which of the given microscope can be used to see nano structures?

(a) Only P and Q

(b) Only Q and R

(c) Only P and R

(d) All P, Q, and R VIEW SOLUTION
• Question 17
The signal light for danger is red in colour. Which of the following principle/principles is/are used in it?
(P) The red coloured light scatters least by fog or smoke.
(Q) The wavelength of red coloured light is about 1.8 times more than that of blue

(a) P only

(b) P and Q both

(c) Q only

(d) None of P or Q. VIEW SOLUTION
• Question 18
Figure given below shows three different mirrors X, Y, and Z along with reflected rays. Find out the correct use of the mirror.

 Mirror → X Y Z Option ↓ A Dressing table Side glass in vehicles Doctor’s use B Side glass in vehicles Doctor’s use Dressing table C Doctor’s in vehicles Dressing table Side glass D Doctor’s use Side glass in vehicles Dressing table
VIEW SOLUTION
• Question 19
Ramesh is sitting on the last bench in class-l0. He can read whatever is written by the teacher on the black board, but he cannot read clearly from the text book. So, of the following statement is: true regarding his eyes?

(a) There is defect in his retina.

(b) His eye lens cannot become thin as required.

(c) His eye lens cannot become thick as required.

(d) A milky and cloudy layer is formed on the eye lens VIEW SOLUTION
• Question 20
We sometimes see rainbow in monsoon season. Which of the fact is not correct about the rainbow?

(a) Dispersion of incident light first, then reflection internally and finally refraction causes rainbow.

(b) Water droplets act like small prisms.

(c) Sometimes there is formation of two rainbows in the sky.

(d) Rainbow is formed in the direction of the sun. VIEW SOLUTION
• Question 21
In Section A, defects of eye are given, in Section B, effects arising due to defects are given and in section C, remedies are given using lenses. Find the correct pair
 Section A Section B Section C 1. Myopia (x) Focal length increases (a) bifocal lens 2. Hypermetropia (y) Focal length decreases (b) Concave lens 3. Presbyopia (z) Power of accommodation decreases (c) Convex Ions

(a) (1 - y - b), (2 - x - c), (3 - z - a)

(b) (1 - z - b), (2 - z - b), (3 - y - b)

(c) (1 - x - a), (2 - y - c), (3 - x - a)

(d) (1 - y - a), (2 - x - a), (3 - z - c) VIEW SOLUTION
• Question 22
Two resistors of 4 Ω and one resistor of 8 Ω are connected in the circuit as shown below. What will be the equivalent resistance between points A and B in the circuit?

(a) 8 Ω

(b) 16 Ω

(c) 1 Ω

(d) 4 Ω VIEW SOLUTION
• Question 23
"In the definite physical situation, the electric current flowing through the conductor is directly proportional to the potential difference applied across it". To verify this law, in which of the following circuit diagram are ammeter and voltmeter connected
correctly?

(a) (P)

(b) (R)

(c) (Q)

(d) (S) VIEW SOLUTION
• Question 24
Which is the correct option for the given statement A and statement B.?
Statement A: The current flowing through each resistor is same when connected in series.
Statement B: The voltage drop across each resistor remains the same when connected in parallel.

(a) Statement A is wrong but B is true.

(b) Statement A and B both are wrong.

(c) Statement A and B both are correct

(d) Statement A is correct but B is wrong. VIEW SOLUTION
• Question 25
With respect to direction of electric current in a conducting wire, which of the following is true.

(a) In the direction of negatively charged particles but opposite to the positively charged particles

(b) In direction of motion of electron

(c) Opposite to the direction of motion of electron

(d) In the direction opposite to the motion of positively charged particles VIEW SOLUTION
• Question 26
Current is flowing through a conductor and creates a magnetic field. Assume that this is the only source of the magnetic field. Reversing a current in a straight conductor with no change to the magnitude (ampere value) will cause a___________.

(a) reduction in the magnetic field

(b) disappearance of the magnetic field

(c) reversal of the direction of the magnetic field

(d) reversal and reduction of the magnetic field VIEW SOLUTION
• Question 27
From which of the following case, the induced current in the loop will not be obtained?

(a) The loop is moved in the direction of the magnet

(b) The loop and magnet are moved in the opposite direction with the same speed

(c) The magnet is moved in the direction of the loop

(d) The loop and magnet are moved in one direction with the same speed VIEW SOLUTION
• Question 28
Solar system comprises of the sun, its planets, their satellites, asteroids and meteors. Which of the following is not a member of the solar system?

(a) Sun

(b) Asteroids

(c) Shooting stars

(d) Artificial satellites VIEW SOLUTION
• Question 29
Which of the following is true in case of a bar magnet and magnetic field lines produced around it?

(a) Magnetic field lines intersect each other at 90° angle

(b) the tangent drawn at any point of a magnetic field line shows the direction of the magnetic field at that point

(c) The magnetic field is a scalar quantity

(d) The region in which the field lines are at a close distance has a weak magnetic field VIEW SOLUTION
• Question 30
An imaginary sphere covering the sky with the earth at its centre is known as the celestial sphere. The ecliptic of the celestial sphere is divided into 27 equal parts, which are known as_________.

(a) Zodiac sign

(b) Akash ganga

(c) Nakshatra

(d) Pulsar VIEW SOLUTION
• Question 31
Which satellite is launched by India for Direct to Home T.V. transmission?

(a) IRS – P

(b) INSAT – 4A

(c) INSAT – 1

(d) CARTOSAT VIEW SOLUTION
• Question 32
Some stars appear red in colour and some blue in colour. Which one of the statements is true?

(a) Star with blue colour has more temperature than red colour star

(b) Temperature of blue colour star is less than red colour star

(c) There is no relation between colour of the star and temperature

(d) Blue colour star and red colour star has equal temperature VIEW SOLUTION
• Question 33
The following table lists the pH values of some acids and bases.
 Solutions pH Hydrochloric acid 1 milk 6 pure water 7 Baking soda 9 Sodium hydroxide 14

What would happen to the pH of an acid and a base when each is diluted (pure distilled water is added to it)?

(a) On dilution, the pH of an acid and base will both decrease.

(b) On dilution, the pH of an acid will increase and that of a base will decrease.

(c) On dilution, the pH of an acid and base will both increase.

(d) On dilution, the pH of an acid will decrease and that of a base will increase. VIEW SOLUTION
• Question 34
3 litre aqueous solution is prepared by dissolving 4.9 gram H2SO4 in water. To calculate pH of this solution, there is need to calculate moles of H2SO4. Which of the following formula you would use?

(a)

(b)

(c)

(d) VIEW SOLUTION
• Question 35
Which of the following substance enters our body when a red ant bites us?

(a) Melittin

(b) Calcium Formate

(c) Formic acid

(d) Magnesium hydroxide VIEW SOLUTION
• Question 36
Some substances are acidic while others are basic. A scale called the pH scale is used to measure the extent of acidity. What will happen to the pH of the solution if a little ACID is added to a beaker of WATER (original pH =7)?

(a) It will become a little less than 7

(b) It will become a little more than 7

(c) It will remain 7

(d) It will become 0 VIEW SOLUTION
• Question 37
Rods of carbon and copper are hammered simultaneously. Which property of carbon is responsible for carbon rod breaking down into pieces?

(a) Ductility

(b) Malleability

(c) Elasticity

(d) Brittle VIEW SOLUTION
• Question 38
In the table given below is the composition of a few alloys. Based on this table answer the question.
 Name of alloy Elements in the alloy Bronz Cu and Zn Brass Sn and Cu Pewter Pb, Sb, Sn, Cu Steel Fe, Cr, Mn, C

Which of these metal alloys does not contain copper?

(a) Brass

(b) Pewter

(c) Bronze

(d) Steel VIEW SOLUTION
• Question 39
Which of the following statement is incorrect?

(a) Corrosion of iron takes place by contact with air and water

(b) The method to convert carbonate containing ore to metal oxide is called calcinations

(c) The melting point and boiling point of metals are low

(d) The displacement of less active metal from their solution takes place by more active metal VIEW SOLUTION
• Question 40
Make the correct pairs for the following given X and Y. X contains substance and Y has method of manufacture.
 X Y 1. Extraction of Sulphur p. Contact process 2. Production of Nitric acid q. Frasch method 3. Production of Sulphuric acid r. Haber’s process 4. Production of Ammonia gas s. Ostwald’s process

(a) (1-s), (2-r), (3-q), (4-p)

(b) (1-r), (2-q), (3-s), (4-p)

(c) (1-q), (2-s), (3-p), (4-r)

(d) (1-s), (2-q), (3-r), (4-p) VIEW SOLUTION
• Question 41
Ammonia is filled in weather balloons that work at very high altitudes, because it is

(a) a neutral gas

(b) a compound of nitrogen

(c) lighter than air

(d) liquefied at low temperatures VIEW SOLUTION
• Question 42
Physical properties of a substance are given below.
P → it is colour less
Q → has intense smell
R → It’s aqueous solution possesses basic property
Which of the above physical properties are correct for sulphur dioxide?

(a) Only P and Q

(b) P, Q and R

(c) Only Q and R

(d) Only R VIEW SOLUTION
• Question 43
During fractional distillation of petroleum, different fractions are obtained, ‘their name, no. of carbon atoms, temperature range at which it is obtained and their use are given below. There is error in one of the alternatives. In which alternative there is error?

(a) Petrol, C5 to C10, 303 K to 393 K, fuel in vehicles.

(b) Diesel, C15 to C18 533 K to 613 K, fuel in vehicles and generators.

(c) Neptha, C8 to C10 393 K to 453 K, solvent in petrochemicals.

(d) Lubricating Oil, C8 to C12, 400K, fuel in high speed vehicles. VIEW SOLUTION
• Question 44
Chemical equations of preparing some substance are given below. Which of the given chemical equation is used for the preparation of Ethyne?
(1) CH3COONa + CaO + NaOH $\stackrel{∆}{\to }$ CH4 + Na2CO3
(2) CaC2 + 2H2O → ΗC ≡ CH + Ca(OH)2
(3) CH3CH2OH  CH2 = CH2 + H2O

(a) (1)

(b) (2)

(c) (3)

(d) (1), (2) VIEW SOLUTION
• Question 45
Which statement is wrong for Anthracite?

(a) It is matured form of mineral coal

(b) When burns produces smoke or smell

(c) Its heat energy is about 33 kJ gram–1

(d) It contains small amount of volatile matter and moisture VIEW SOLUTION
• Question 46
Water gas is a mixture of which two gases?

(a) Carbon dioxide and hydrogen

(b) Carbon monoxide and hydrogen

(c) Carbon and hydrogen

(d) Ammonia and hydrogen VIEW SOLUTION
• Question 47
In section A, there are some organic compounds and in section B, their uses are mentioned . Match the correct options.
 Section A Section B 1. Ethanol (a) Nail polish remover 2. Formalin (b) To have sour taste in food 3. Acetone (c) In fragrant materials like perfumes 4. Ethanoic Acid (d) To preserve dead bodies

(a) (1-c), (2-d), (3-a), (4-b)

(b) (1-a), (2-d), (3-c), (4-b)

(c) (1-b), (2-a), (3-d), (4-c)

(d) (1-d), (2-c), (3-b), (4-a) VIEW SOLUTION
• Question 48
The atom or the group of atoms by which the characteristic reactions of organic compounds are determined, that atom or group of atoms is called_____.

(a) Hydrocarbon

(b) Functional group

(c) Atom

(d) Compound VIEW SOLUTION
• Question 49
Which polymer is used in non-stick cooking vessels?

(a) Polythene

(b) Isoprene

(c) Teflon

(d) Neoprene VIEW SOLUTION
• Question 50
Stomach is a very important organ in the digestive system. The food is churned in stomach for nearly three hours. What can be found in stomach from the given?

(a) Amylase, gastric juice, intestinal juice

(b) Dil. Hydrochloric acid, pepsinogen and mucus

(c) Bile, alkaline salts, Trypsin

(d) Villi, lipase, and Trypsin VIEW SOLUTION
• Question 51
How will nanotechnology help to face the future challenges?           [2]

OR

Discuss any two properties of carbon nanotubes. VIEW SOLUTION
• Question 52
Give the definition of electric current and define its unit.          [2] VIEW SOLUTION
• Question 53
Briefly explain: coal tar and coal gas.           [2]

OR

Distinguish between L. P. G. and C. N. G. VIEW SOLUTION
• Question 54
Draw the diagram of human excretory system and label it.         [2] VIEW SOLUTION
• Question 55
What do global problems mean? Which are the global problems that organisms are facing today?     [2] VIEW SOLUTION
• Question 56
What are terrestrial planets? Mention the common characteristics of them.       [2] VIEW SOLUTION
• Question 57
What is reflection? Give its two examples.          [2] VIEW SOLUTION
• Question 58
What is Neutralisation? Explain.            [2] VIEW SOLUTION
• Question 59
Will geographical isolation be a major factor in the speciation of an organism that reproduces sexually? Give reasons for your answer.      [2]

OR

Explain classification of living organisms on the basis of evolution. VIEW SOLUTION
• Question 60
Give some approaches to water management.            [2] VIEW SOLUTION
• Question 61
Explain the subtractive method for mixing the pigment.            [3] VIEW SOLUTION
• Question 62
State the characteristics of magnetic field lines.             [3]

OR

What precautions should be taken during the use of electricity? VIEW SOLUTION
• Question 63
Discuss Haber’s process for industrial manufacture of ammonia.       [3] VIEW SOLUTION
• Question 64
What is soap? Describe its preparation.             [3]

OR

Describe the method of production of ethanol by fermentation reaction. VIEW SOLUTION
• Question 65
Explain female reproductive organs.          [3] VIEW SOLUTION
• Question 66
Derive the relation between focal length and radius of curvature for spherical mirrors.        [5] VIEW SOLUTION
• Question 67
Explain the method of obtaining pure aluminium from alumina.         [5]

OR

What is concentration of ore? Give the method of concentrating sulphide containing ore and describe it with figure. VIEW SOLUTION
• Question 68
Draw a labelled diagram of human digestive system and explain it.           [5]

OR

What is Nutrition? What is the mode of nutrition in Amoeba known as? Draw diagram and explain. VIEW SOLUTION
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