Board Paper of Class 10 2016 Science - Solutions

• Question 1
  By which we can measure the exact pH of aqueous solution?
  (A) pH meter
  (B) litmus paper
  (C) pH paper
  (D) universal indictor VIEW SOLUTION

• Question 2
  Which gas is produced during the reaction of base with metals?
  (A) Dihydrogen
  (B) Dioxygen
  (C) Carbon dioxide
  (D) Dinitrogen VIEW SOLUTION

• Question 3
  In three test tubes P, Q, and R iron nails, water, oil and anhydrous calcium chloride is taken. Among these test tubes, in which test tubes corrosion of nails will not take place?
  
  
  
  (A) P, Q and R
  (B) P and R
  (C) P and Q
  (D) Q and R VIEW SOLUTION

• Question 4
  Which displacement reaction will not occur among the following reactions?
  (Insert Image)
  (A) Zn + CuSO4
  (B) Fe + CuSO4
  (C) Cu + FeSO4
  (D) Mg + CuSO4 VIEW SOLUTION

• Question 5
  In the table, properties of some specimens are given.
   

  Specimen	Melting Point	Shining	Malleability	Electric conductivity
  P	High	more	No	Insulator
  Q	High	less	No	conductor
  R	High	more	Yes	conductor
  S	Low	less	Yes	low conductor

  
  Which of the following is a metal?
  
  (A) R
  (B) Q
  (C) P
  (D) S VIEW SOLUTION

• Question 6
  Which statement is wrong among the following statement?
  Statement 1: Non metal possess the property of ductility and malleability.
  Statement 2: Non metallic elements in solid form are brittle.
  Statement 3: Metal can produce ringing sound by striking.
  Statement 4: Melting points and boiling points of metals are low.
  (A) Statement 1 and 3
  (B) Statement 2 and 3
  (C) Statement 1 and 4
  (D) Statement 2 and 4 VIEW SOLUTION

• Question 7
  Properties of one gas is given below, Identify the gas,
  1) It is produced by Haber's process.
  2) It possesses very intensive smell, causes irritation in the nose and eyes.
  3) It is highly soluble in water.
  4) Its aqueous solution acts as a weak base.
  (A) SO₂
  (B) H₂
  (C) N₂O
  (D) NH₃ VIEW SOLUTION

• Question 8
  Make the correct pairs from below mentioned X and Y.
   

  X		Y
  a)	Dehydrating agent	1)	Sulphur dioxide gas
  b)	In preparation of fire crackers	2)	Concentrated sulphuric acid
  c)	Weak bleaching agent	3)	Dihydrogen gas
  d)	Lightest gas	4)	Sulphur

  
  (A) (a-2), (b - 4), (c -1), (d - 3)
  (B) (a -3), (b - 2), (c- 4), (d - 1)
  (C) ( a - 4), (b - 3), (c -1), (d - 2)
  (D) (a - 3), (b - 1), (c - 2), (d - 4) VIEW SOLUTION

• Question 9
  Water gas is a mixture of which gas?
  P: Carbon dioxide Q: Hydrogen R: Carbon monoxide
  (A) Q and R
  (B) P and Q
  (C) P and R
  (D) P, Q and R VIEW SOLUTION

• Question 10
  Which component, obtained from refining of petroleum, is used as solvent in petrochemicals?
  (A) Tar
  (B) Kerosene
  (C) Naphtha
  (D) Petroleum coke VIEW SOLUTION

• Question 11
  Properties of one of the mineral coal is given below. Identify the mineral coal.
  1) It is a matured form of mineral coal.
  2) It contains 94 to 98% carbon.
  3) Its heat energy is about 33 kJ gram-1.
  (A) Bituminous coal
  (B) Lignite
  (C) Peat
  (D) Anthracite VIEW SOLUTION

• Question 12
  What is called fossil fuel?
  (A) Mineral Coal
  (B) Petroleum
  (C) Natural Gas
  (D) All the given VIEW SOLUTION

• Question 13
  The general formula for alcohol series is C_nH_2n+1 OH. Which is the formula for alcohol containing four carbon?
  (A) C₅H₁₁OH
  (B) C₄H₉OH
  (C) C₄H₈OH
  (D) C₃H₈OH VIEW SOLUTION

• Question 14
  One girl student uses the liquid compound to remove nail paint from her nail. The liquid compound removes the nail paint from her nail. Give the name of this compound.
  (A) Acetic acid
  (B) Formalin
  (C) Ethanol
  (D) Propanone VIEW SOLUTION

• Question 15
  From which of the following methanol is not used?
  (A) for making dyes, phenol and polymer
  (B) used as raw material in plastic industry
  (C) to preserve residues of dead animals
  (D) in production of ammonia VIEW SOLUTION

• Question 16
  The food we take in our body travels through a long and complex path. Which starts from mouth and ends at anus? Which is the correct sequence of process on food in digestive system?
  (A) Digestion →Absorption Egestion→ Ingestion
  (B) Ingestion → Egestion → Digestion → Absorption
  (C) Digestion → Ingestion→ Absorption → Egestion
  (D) Ingestion → Digestion → Absorption → Egestion VIEW SOLUTION

• Question 17
  Which statement is true for structure of human heart?
  (A) The walls of atria are thin while the wall of ventricles are thick.
  (B) There is a bicuspid valve between right atrium and right ventricle.
  (C) There is a tricuspid valve between left atrium and left ventricle.
  (D) The upper two chambers of heart is called ventricles and lower two chambers is called atria. VIEW SOLUTION

• Question 18
  In which part of the body blood gets purified (becomes oxygenated)?
  (A) Atrium
  (B) Lungs
  (C) Heart
  (D) Ventricle VIEW SOLUTION

• Question 19
  During which process blood is filtered out in Bowman's capsule?
  (A) Reabsorption
  (B) Secretion
  (C) Ultrafiltration
  (D) None of them VIEW SOLUTION

• Question 20
  By which name, the short tubular region after Bowman's capsule in kidney, is known?
  (A) Henle's Loop
  (B) Proximal tubule
  (C) Neck
  (D) Distal tubule VIEW SOLUTION

• Question 21
  21) What is called the movement of plant towards gravity?
  (A) Chemotropism
  (B) Geotropism
  (C) Hydrotropism
  (D) Phototropism VIEW SOLUTION

• Question 22
  Which of the following is a mis-matched pair?
  (A) insulin - pancreas
  (B) estrogens - ovary
  (C) adrenaline - pituitary gland
  (D) testosterone – testis VIEW SOLUTION

• Question 23
  What does the figure indicates given below?
  
  
  
  
  (A) Binary Fission in Amoeba
  (B) Formation on temporary finger like projection in Amoeba
  (C) Buddin in yeast
  (D) Formation of cyst in Amoeba VIEW SOLUTION

• Question 24
  In which living organism asexual reproduction take place among following?
  
  P-Amoeba  Q- Cladophora  R- Yeast  S- Banana
  
  (A) P and Q
  (B) P, R and S
  (C) Q and S
  (D) Q, R and S VIEW SOLUTION

• Question 25
  Which process is important for production of gametes in living organism performing sexual reproduction in context with chromosomes?
  (A) Inequal fission
  (B) Meiosis
  (C) Mitosis
  (D) Multiple fission VIEW SOLUTION

• Question 26
  The following chart depicts the fertilization between male and female during sexual production
  
  
  
  
  
  
  Which is true for P, Q, R and S from the following?
   

  Sr. No	P	Q	R	S
  1.	Ovary	Testis	Ova	Sperm
  2.	Testis	Ovary	Sperm	Ova
  3.	Uterus	Penis	Ova	Sperm
  4.	Penis	Uterus	Sperm	Ova

  
  (A) Sequence - 3
  (B) Sequence - 2
  (C) Sequence - 1
  (D) Sequence - 4 VIEW SOLUTION

• Question 27
  Which is the correct sequence in context with the least bio degradable to most biodegradable material?
  (A) Bones, Plastic, Paper, Metal Can
  (B) Paper, Metal Can, Bones, Paper
  (C) Plastic, Metal Can, Bones, Paper
  (D) Plastic, Bones, Paper, Metal Can VIEW SOLUTION

• Question 28
  Which sentence is not true in context with house hold waste management?
  (A) Buy loose fruits and vegetables to avoid packaging
  (B) Throwing waste in garbage
  (C) Increase the uses of polythene
  (D) Use rechargeable batteries VIEW SOLUTION

• Question 29
  When we destroy forest, what we are actually destroying?
  (A) Only food for wild life
  (B) Only wild life's habitat
  (C) Only trees
  (D) Our environment VIEW SOLUTION

• Question 30
  Today we are using natural resources maximum. Which of the following alternative correctly explain the natural resources?
  (A) Resources not made by human but made by nature and used by living organism
  (B) Resources made by human and used by all living organism
  (C) Resources made and used by human
  (D) Only forest product VIEW SOLUTION

• Question 31
  An important parameter that determines the functioning of nano material is surface area to volume ratio. Because of which reason small granules of sugar dilute faster than big piece of sugar cube?
  
  (A) $\frac{\mathrm{SA}}{\mathrm{V}}$ ratio of sugar granules is smaller than sugar cube
  
  (B) Cannot say anything without knowing temperature of solvent
  
  (C) $\frac{\mathrm{SA}}{\mathrm{V}}$ratio is same for sugar and sugar cube
  
  (D) $\frac{\mathrm{SA}}{\mathrm{V}}$ ratio of sugar granules is larger than sugar cube. VIEW SOLUTION

• Question 32
  Make proper pair.
  
  a. Fullerene       
  
  
  b. SWNT           
  
  
  c. MWNT          
  
  
  
  d. Carbon         
  
  
  
  
  (A) a - 2, b - 4, c - 1, d - 3
  (B) a - 3, b -1, c - 2, d - 4
  (C) a - 4, b - 2, c - 1, d - 3
  (D) a -1, b - 3, c - 4, d - 2 VIEW SOLUTION

• Question 33
  From the understanding of cartesian sign convention for reflection by spherical mirror, students took part in group discussion for FA-I in classroom. Who is wrong in the group discussion?
  
  Alpesh : All the distances are measured from the pole of a mirror parallel to the principal axis.
  
  Beena: The distance measured in the direction of incident ray are taken positive.
  
  Champak: The height measured upward and perpendicular to principal axis is taken negative.
  
  Daksha : The height measured downward and perpendicular to principal axis is taken as positive.
  (A) Champak and Daksha
  (B) Only Champak
  (C) Mpesh and Beena
  (D) Only Daksha VIEW SOLUTION

• Question 34
  Which statement is wrong from the following for the reflection by plane mirror?
  (A) The size of image is same as size of object
  (B) Object distance and image distance is same
  (C) A plane mirror forms virtual and erect image
  (D) Image of the object in not laterally inverted VIEW SOLUTION

• Question 35
  Which coloured light scatters least by fog and smoke?
  (A) Green
  (B) Yellow
  (C) Blue
  (D) Red VIEW SOLUTION

• Question 36
  Which is true for the far sightedness or hypermetropia from the following?
  (A) Eyelense does not become thin as per requirement
  (B) Distant object cannot be seen clearly
  (C) Nearby object cannot be seen clearly
  (D) Defect can be corrected by using concave lens VIEW SOLUTION

• Question 37
  Specify the colour for P and Q from the following diagram.
  
  
  
  (A) Magenta and Yellow
  (B) White and Cyan
  (C) White and Yellow
  (D) Magenta and Cyan VIEW SOLUTION

• Question 38
  Which pair is not correct for the instrument used in the laboratory and their uses from the following?
   

  	Instrument	Uses
  (A)	Voltmeter	To measure the electric potential difference
  (B)	Ammeter	To measure the electric current
  (C)	Galvanometer	To detect the presence of current
  (D)	Resistor	To supply the electric energy to circuit

  VIEW SOLUTION

• Question 39
  To deposit the copper on the iron spoon, the copper plate is to be connected with what?
  (A) With the iron spoon
  (B) With the positive terminal
  (C) With the negative terminal
  (D) Between the positive and negative terminal of battery VIEW SOLUTION

• Question 40
  P. Q, R and S are the conductors in the following diagram. By removing which conductor the bulb will not glow?
  
  
  
  (A) S
  (B) R
  (C) Q
  (D) P VIEW SOLUTION

• Question 41
  Which statement is true according to Ohm's law?
  (A) Current will increase by increasing voltage in circuit
  (B) Resistance will increase by increasing voltage in circuit
  (C) Resistance will increase by increasing current in circuit
  (D) Resistance and current both will increase by increasing voltage VIEW SOLUTION

• Question 42
  Which statement is wrong from the following?
  (A) The earthing wire is green coloured.
  (B) In India, current flowing through wire is AC and its frequency is 50Hz.
  (C) In India, voltage between two wires is 110V.
  (D) T.V., tube light, bulbs are connected with 5A line. VIEW SOLUTION

• Question 43
  Match the following:
   

  	Section A		Section B
  1.	Fuse	P.	Converts electric energy in to mechanical energy
  2.	Electric generator	Q.	Heating effect of electric current
  3.	Electric motor	R.	Converts mechanical energy in to electrical energy

  
  (A) 1 - Q, 2 - R, 3 - P
  (B) 1 - Q, 2 - P, 3 - R
  (C) 1 - P, 2 - Q, 3 - R
  (D) 1 - P, 2 - R, 3 - Q VIEW SOLUTION

• Question 44
  Which instrument is not used to convert electrical energy in to heat energy?
  (A) Room heater
  (B) Electric Iron
  (C) Electric Bell
  (D) Electric Water heater VIEW SOLUTION

• Question 45
  Planets are divided in to two groups based on their characteristic.
   

  Group - 1	Group - 2
  Structure of planets resemble to earth	Structure of planets resembles Jupiter
  They have fewer natural satellites	They have large number of natural satellites
  They have thin atmosphere	Rings are seen around planets

  
  Which of the following is included in group – 2?
  
  (A) Mercury and Venus
  (B) Saturn and Mercury
  (C) Jupiter and Saturn
  (D) Jupiter and Venus VIEW SOLUTION

• Question 46
  Some planets and their characteristics are given below. Which option is wrong among this?
   

  (A)	Earth	possesses living organism
  (B)	Venus	bright planet
  (C)	Mars	reddish planet
  (D)	Jupiter	smallest planet

  VIEW SOLUTION

• Question 47
  Which statement is wrong from the following?
  Statement – 1: METSAT is useful for weather forecasting.
  Statement – 2: INSAT is useful for Direct to Home (DTH) transmission.
  Statement - 3: CARTOSAT is useful for astronomical observation.
  (A) Statement - 1
  (B) Statement - 3
  (C) Statement - 1 and 2
  (D) Statement - 2 VIEW SOLUTION

• Question 48
  In which planet sun sets in east?
  (A) Saturn
  (B) Venus
  (C) Mercury
  (D) Pluto VIEW SOLUTION

• Question 49
  When honeybee bites, which chemical enters in to our body?
  (A) Calcium formate
  (B) Melittin
  (C) Formic acid
  (D) Magnesium hydroxide VIEW SOLUTION

• Question 50
  One student examines the properties of substance in laboratory. Aqueous solution of this substance converts blue litmus paper in to red. Identify the substance
  P: Lemon juice Q: Tomato juice R: Washing soda
  (A) P and R
  (B) Q and R
  (C) P and Q
  (D) P, Q and R all VIEW SOLUTION

• Question 51
  How nano- technology can be useful in energy sector? Explain                           [2]
   

  OR

  
  ''Nano-technology is considered as an invention of modern society use has been identified from long past’ Give four examples providing statement. VIEW SOLUTION

• Question 52
  Draw a labelled diagram of experiment explaining Ohm's Law.                  [2]
  (Blind candidate can write apparatus and experimental method in short) VIEW SOLUTION

• Question 53
  What is isomer? Write the isomer of butane with structural formula                   [2]
   

  OR

  
  Write the industrial name and two use of ethyne. VIEW SOLUTION

• Question 54
  Write four points of difference between arteries and veins.                     [2] VIEW SOLUTION

• Question 55
  Explain the types of waste based on its nature and degradation.                        [2] VIEW SOLUTION

• Question 56
  What is solar system? Write the name of planets of solar system in sequence      [2] VIEW SOLUTION

• Question 57
  Write the definition of acid and base based on Arrhenius principle and write the limitations of this principle.    [2] VIEW SOLUTION

• Question 58
  Write the properties of hormone.                 [2] VIEW SOLUTION

• Question 59
  Explain the acquired trait with examples                                      [2]
   

  OR

  
  In which way analogous organs gives evidence for evolution? VIEW SOLUTION

• Question 60
  Explain the usefulness of dam constructed on the river.              [2] VIEW SOLUTION

• Question 61
  Explain total internal reflection using diagram.                  [3]
  (Blind student should not have to draw diagram) VIEW SOLUTION

• Question 62
  What precautions should be taken during the use of electricity?                 [3]
  (Write any six points)
   

  OR

  
  Write principle and uses of electric motor with diagram.
  (Constructions and working is not necessary) VIEW SOLUTION

• Question 63
  Explain the method of preparation of hydrogen gas in laboratory with chemical equation and diagram.                [3] VIEW SOLUTION

• Question 64
  Explain the cleansing process of the soap and detergent.                 [3]
   

  OR

  
  Write industrial production of ethanol with two uses. VIEW SOLUTION

• Question 65
  Explain the processes to control human population                        [3] VIEW SOLUTION

• Question 66
  What is len's formula? Derive the formula $\frac{1}{\mathrm{v}}-\frac{1}{\mathrm{u}}=\frac{1}{\mathrm{f}}$ for spherical lens.               [5] VIEW SOLUTION

• Question 67
  Write the name of different stages of obtaining pure metal from its ore.              [5]
  Explain refining of copper by electrolysis with diagram.
   

  OR

  
  Discuss the Bayer's method for extraction of alumina from bauxite ore with chemical equation. VIEW SOLUTION

• Question 68
  What is nutrition? Explain heterotrophic nutrition with their types.                        [5]
   

  OR

  
  What is respiration? Write the detail note on human respiratory organs. VIEW SOLUTION