Maharashtra SSC Class 10 Science and Technology I March 2020 question paper with answers

Q.1 (A)

1 mark each

Q.1 (A) (i)1 mark $According to Mendeleev's periodic law, properties of elements are a periodic function of their _______.$
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Q.1 (A) (ii)1 mark $The vapour content in the air is measured using a physical quantity called _______.$
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Q.1 (A) (iii)1 mark $For the normal human eye, the near point is at _______ cm.$
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Q.1 (A) (iv)1 mark $The astronomical object closest to us is _______.$
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Q.1 (A) (v)1 mark $In the Wilfley table method, the particles of gangue are separated by _______ separation method.$
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Q.1 (B)

1 mark each

Q.1 (B) (i)1 mark $Find the odd one out: Voltmeter, Ammeter, Thermometer, Galvanometer.$
Q.1 (B) (ii)1 mark $=$
Q.1 (B) (iii)1 mark $State true or false: The frequency of AC is 50 Hz.$
Q.1 (B) (iv)1 mark $Match the columns: Column 'A' Column 'B' The wavelength of red light (a) 600 nm (b) 700 nm (c) 500 nm$
Q.1 (B) (v)1 mark $Name the first artificial satellite sent by Russia in space.$

Column 'A'	Column 'B'
The wavelength of red light	(a) 600 nm
	(b) 700 nm
	(c) 500 nm

Q.2 (A)

2 marks each · attempt any 2

Q.2 (A) (i)2 marks $Give scientific reason: The weight of an object changes from place to place though its mass is constant.$
Q.2 (A) (ii)2 marks $Give scientific reason: Stars twinkle but we do not see the twinkling of planets.$
Q.2 (A) (iii)2 marks $Give scientific reason: Elements belonging to the same group have the same valency.$

Q.2 (B)

2 marks each · attempt any 3

Q.2 (B) (i)2 marks $20^\circ C$
Q.2 (B) (ii)2 marks $Observe the given figure of Fleming's Right Hand Rule (the thumb shows the motion of a conductor) and write the labels of A and B correctly.$
Q.2 (B) (iii)2 marks $Observe the given graph of the volume of 1 kg of water versus temperature and answer: a. Name the process represented in the figure. b. At what temperature does this process take place?$
Q.2 (B) (iv)2 marks $\mathrm{CuSO_4\,(aq) + Fe\,(s) \rightarrow \underline{\qquad} + \underline{\qquad}}$
Q.2 (B) (v)2 marks $Write a short note on Alloying.$

Q.3

3 marks each · attempt any 5

Q.3 (i)3 marks $An element has its electronic configuration as 2, 8, 2. Now answer the following: a. What is the atomic number of this element? b. What is the group of this element? c. To which period does this element belong?$
Q.3 (ii)3 marks $Observe the given figure showing the orbit of a planet moving around the Sun and write the three laws related to it.$
Q.3 (iii)3 marks $Read the given passage and answer: The home electrical connection consists of 'live', 'neutral' and 'earth' wires. The 'live' and the 'neutral' wires have a potential difference of 220 V. The 'earth' is connected to ground. Due to a fault in the equipment, or if the plastic coating on the 'live' and 'neutral' wires gives way and the two wires come in contact, a large current flows producing heat, and any inflammable material around can catch fire. Therefore a fuse wire is used as a precautionary measure. a. Name the two wires having a potential difference of 220 V. b. What is a short circuit? c. Write the function of a fuse.$
Q.3 (iv)3 marks $Observe the given figure (a ray AC travelling from air into a glass block, refracting along CB, with angle of incidence i and angle of refraction r about the normal N) and answer: a. Name the process represented by the figure. b. State the two laws related to the process.$
Q.3 (v)3 marks $What is an artificial satellite? Name any two types of artificial satellite and state their functions.$
Q.3 (vi)3 marks $Answer the following: a. Define hydrocarbons. b. Name the types of hydrocarbons. c. Name two carbon compounds used in day-to-day life.$
Q.3 (vii)3 marks $Observe the given figure of the reactivity series of metals and answer: a. Name two metals which react with water. b. Name two moderately reactive metals. c. Name the most highly reactive metal and the most less reactive metal.$
Q.3 (viii)3 marks $\mathrm{CH_4}$

Straight chain of Carbon compounds	Structural formula	Molecular formula	Name
C	H-C(H)(H)-H	$\mathrm{CH_4}$	Methane
C-C	?	?	Ethane
C-C-C	?	$\mathrm{C_3H_8}$	?
C-C-C-C	H-C-C-C-C-H (with H filling)	?	?

Q.4

5 marks each · attempt any 1

Q.4 (i)5 marks $Draw a scientifically correct labelled diagram of a human eye and answer the questions based on it: a. Name the type of lens in the human eye. b. Name the screen at which the maximum amount of incident light is refracted. c. State the nature of the image formed of the object on the screen inside the eye.$
Q.4 (ii)5 marks $\mathrm{Fe_2O_3\cdot H_2O}$