Maharashtra SSC Science and Technology Part 1 Board Paper March 2024

Q.1 (A)(i) The SI unit of heat is ..................................

Q.1 (A)(ii) We can see the sun even when it is little below the horizon because of .........................................

Q.1 (A)(iii) .................... is the functional group of carboxylic acid.

Q.1 (A)(iv) In simple microscope .......................... lens is used.

Q.1 (A)(v) In ...................... process a layer of molten tin is deposited on metals.

Q.1 (B)(i) Write the name of the atom having the smallest size.

Q.1 (B)(ii) Write the molecular formula of calcium carbonate.

Q.1 (B)(iii) Write the use of ‘Calorimeter’.

Q.1 (B)(iv) Identify the hydrocarbon from the given electron-dot structure :

[Electron-dot structure: H : C : C : H with two H atoms above and two H atoms below the two carbon atoms; all the valence electrons of carbon are shared.]

Q.1 (B)(v) Match the Columns :

Q.2 (A)(i) Give scientific reasons : When the gas formed on heating limestone, is passed through freshly prepared lime water, the lime water turns milky.

Q.2 (A)(ii) Give scientific reasons : Tungsten metal is used to make a solenoid type coil in an electric bulb.

Q.2 (A)(iii) Give scientific reasons : On exposure to air, silver articles turn blackish after some time.

Q.2 (B)(i) State Dobereiner’s law of triad. Give one example of it.

Q.2 (B)(ii) Identify the figure and explain its use :

[Figure: a rectangular coil placed between the two poles of a magnet; the ends of the coil are taken out through an axle and connected to an ammeter A, forming a closed circuit; arrows show the coil rotating in the magnetic field.]

Q.2 (B)(iii) What is meant by satellite launch vehicle ? Name any one Indian satellite launch vehicle.

Q.2 (B)(iv) What is free fall ? When is it possible ?

Q.2 (B)(v) The focal length of a convex lens is 20 cm. What is its power ?

Q.3 (i) Select the appropriate options and complete the following paragraph :

(Metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).

On the basis of electronic configuration, elements in the modern periodic table are classified into ...................... blocks. Groups 1 and 2 elements are included in ......................... and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ..................... . This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ........................... and all the elements are ............................ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute .................... and all these elements are metals.

Q.3 (ii) (a) What are the factors affecting the rate of chemical reaction ?
(b) Explain any one factor.

Q.3 (iii) Observe the following graph and answer the following questions :

[Graph: temperature in ºC on the y-axis (0 to 100) against time in minutes on the x-axis (0 to 34). From A (0 ºC, 0 min) the line runs horizontally along 0 ºC to B (about 5 min), marked “Ice + Water (Solid + liquid)”; it then rises steadily as “Water Liquid” from B to C (100 ºC, about 22 min), and then runs horizontally from C to D, marked “Boiling water + Vapour” and “Liquid - Gaseous state”.]

(a) What does the graph represent ?
(b) What does the line AB represent ?
(c) What does the line BC represent ?

Q.3 (iv) Complete the following table by observing the given figures :

[Figure 1: parallel rays from a distant object enter the eye and meet at a point in front of the retina. Figure 2: parallel rays enter the eye and would meet at a point behind the retina.]

Q.3 (v) Write any three general properties of ionic compounds.

Q.3 (vi) Observe the figure and answer the questions :

[Figure: two spheres of masses m₁ and m₂ separated by a distance d, with equal forces F shown acting on each, directed towards the other.]

(a) State Newton’s universal law of gravitation.
(b) If the distance between the two bodies is tripled, how will the gravitational force between them change ?
(c) What will happen to gravitational force, if mass of one of the object is doubled ?

Q.3 (vii) The orbit of a satellite is exactly 35780 km above the earth’s surface and its tangential velocity is 3.08 km/s.
How much time the satellite will take to complete one revolution around the earth ?
(Radius of earth = 6400 km.)

Q.3 (viii) What is a solenoid ? Draw a neat diagram and name its various components.

Q.4 (i) Observe the given diagram and answer the questions :

[Figure: a triangular glass prism; a beam of white “Sun light” falls on one face, is refracted inside the prism and comes out of the other face as a band of colours marked R, O, Y, G, B, I, V from top to bottom.]

(a) Name the process shown in the figure.
(b) Name the colour that deviates the most.
(c) Name the colour that deviates the least.
(d) Name any one phenomenon in the nature which is based on the above process.
(e) Define ‘spectrum’.

Q.4 (ii) Observe the diagram given below and answer the questions :

[Figure: a big test tube fitted with a two-holed cork and held on a stand; through one hole a thistle funnel reaches the liquid at the bottom, where sodium carbonate is placed; through the other hole a gas delivery tube leads to a small test tube containing freshly prepared lime water. Acetic acid is poured through the thistle funnel.]

(a) Name the reactants in this reaction.
(b) Which gas comes out as effervescence in the bigger test tube ?
(c) What is the colour change in the lime water ?
(d) In the above experiment instead of sodium carbonate which chemical can be used to get same products ?
(e) Write the use of acetic acid.