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Maharashtra SSC Class 10 Science and Technology I March 2025 question paper

Maximum marks 40 · Time 2 hours

Try each question first, then open its model answer. Where the paper offers a choice, both questions are shown with OR between them.

Q.1 (A)

1 mark each

  1. Q.1 (A) (i)1 mark
    Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ____ .

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  2. Q.1 (A) (ii)1 mark
    The reaction in which ions in the reactants are exchanged to form a precipitate is called as ____ reaction.

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  3. Q.1 (A) (iii)1 mark
    ____ is used to make a solenoid type coil in an electric bulb.

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  4. Q.1 (A) (iv)1 mark
    Light changes its direction when going from one transparent medium to another transparent medium. This process is called ____ .

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  5. Q.1 (A) (v)1 mark
    CaO+H2O→Ca(OH)2+HeatCaO + H_2O \rightarrow Ca(OH)_2 + Heat is an example of ____ reaction.

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Q.1 (B)

1 mark each

  1. Q.1 (B) (i)1 mark
    State whether true or false: A redox reaction takes place during cellular respiration.
  2. Q.1 (B) (ii)1 mark
    Find the odd one out: Loudspeaker, microphone, electric motor, magnet.
  3. Q.1 (B) (iii)1 mark
    What is the reason for twinkling of stars?
  4. Q.1 (B) (iv)1 mark
    Match the columns:
    Column 'A'Column 'B'
    Simple microscope(a) used to observe minute objects
    (b) used to see distant objects
    (c) used for watch repair
  5. Q.1 (B) (v)1 mark
    Name the behaviour of water between its temperature from 0∘C0^\circ C to 4∘C4^\circ C.

Q.2 (A)

2 marks each · attempt any 2

  1. Q.2 (A) (i)2 marks
    Give scientific reason: While going from left to right within a period, the size of atom decreases.
  2. Q.2 (A) (ii)2 marks
    Give scientific reason: For electric power transmission, copper or aluminium wire is used.
  3. Q.2 (A) (iii)2 marks
    Give scientific reason: In some countries, ethanol is used as an additive to increase the efficiency of petrol.

Q.2 (B)

2 marks each · attempt any 3

  1. Q.2 (B) (i)2 marks
    Name and state the principle used to measure the specific heat capacity of a substance.
  2. Q.2 (B) (ii)2 marks
    What is done to prevent rusting of iron door of your house?
  3. Q.2 (B) (iii)2 marks
    Distinguish between mass and weight.
  4. Q.2 (B) (iv)2 marks
    The 'rocket' is a type of fire cracker used in Diwali. (a) Name the launcher. (b) Name the law on which its working is based.
  5. Q.2 (B) (v)2 marks
    What is meant by decomposition reaction? Write the chemical reaction of decomposition of sugar on heating.

Q.3

3 marks each · attempt any 5

  1. Q.3 (i)3 marks
    An iron ball of mass 3 kg is released from a height of 125 m and falls freely to the ground. Assuming that the value of gg is 10 m/s210\ m/s^2, calculate: (a) Time taken by the ball to reach the ground. (b) Velocity of the ball on reaching the ground.
  2. Q.3 (ii)3 marks
    Write the name and symbol of the element from the description: (a) The most electronegative atom. (b) The atom having smallest atomic mass. (c) The noble gas with the smallest atomic radius.
  3. Q.3 (iii)3 marks
    (a) What happens when copper reacts with concentrated nitric acid? What is the colour of the gas released during the reaction? (b) Write its balanced chemical equation. (c) Write the names of reactants and products.
  4. Q.3 (iv)3 marks
    Name the following diagrams and explain the concept behind them:
  5. Q.3 (v)3 marks
    Answer the following with respect to the 'Formation of Rainbow': (a) Draw a neat diagram to show the formation of rainbow. (b) Name any two natural processes involved in the formation of rainbow. (c) What does a small droplet of water act as?
  6. Q.3 (vi)3 marks
    Name the following: (a) The two metals which can be cut with a knife. (b) A sound is produced when certain metals are struck. Name this property of metals. (c) The non-metallic substance which is a good conductor of electricity.
  7. Q.3 (vii)3 marks
    Answer the following questions with the help of the given diagram [an electrolytic cell: a silver plate as the anode and an aluminium spoon as the cathode dipped in an electrolyte, connected to a cell, with Ag+Ag^+ and NO3−NO_3^- ions in the solution]: (a) Name the process shown in the diagram. (b) How does this process take place? (c) Give two examples in which this process is used.
  8. Q.3 (viii)3 marks
    Complete the following table:
    Type of the satelliteFunction of the satelliteThe names of the Indian satellite series and their launch vehicles
    (a)____Fix the location of any place on the earth's surface____
    (b)Weather satellite________
    (c)________IRS; Launcher: PSLV

Q.4

5 marks each · attempt any 1

  1. Q.4 (i)5 marks
    (a) Draw a neat labelled diagram of human eye. (b) What is the minimum distance of distinct vision for a normal human eye? (c) Name the capacity of the eye lens to change its focal length as per need. (d) Name the defect of eye vision in which the focussing power of eye lens decreases with age.
  2. Q.4 (ii)5 marks
    Atomic number of chlorine is 17. (a) Write the electronic configuration of chlorine. (b) What is the number of electrons in the valence shell of chlorine? (c) Write the molecular formula of chlorine. (d) Name the type of bond in the formation of chlorine molecule. (e) Draw the electron dot structure of a chlorine molecule.