Maharashtra SSC Science and Technology Part 1 Board Paper July 2025

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

Q.1 (A)(ii) When the positive charge on an atom or an ion increases or the negative charge on them decreases it is called .............. .

Q.1 (A)(iii) ..................... device is used to produce electricity.

Q.1 (A)(iv) Light changes its direction when going from one transparent medium to another transparent medium. This is called the ................... of light.

Q.1 (A)(v) Height of the High earth orbit from the surface of the earth is ..................... .

Q.1 (B)(i) Find the odd one out :
Fuse wire, bad conductor, rubber gloves, generator.

Q.1 (B)(ii) Complete the co-relation.
Red light wavelength close to : 700 nm : : Violet light wavelength close to : .................... .

Q.1 (B)(iii) Match the pair :

Q.1 (B)(iv) Write the electronic configuration of ‘Aluminium’.

Q.1 (B)(v) State true or false :
The escape velocity on the moon is less than that on the earth.

Q.2 (A)(i) Give scientific reasons : Sodium is always kept in kerosene.

Q.2 (A)(ii) Give scientific reasons : We cannot clearly see an object kept at a distance less than 25 cm from the eye.

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

Q.2 (B)(i) An object takes 5 seconds to reach the ground from a height of 5 m on a planet. What is the value of ‘g’ on the planet ?

Q.2 (B)(ii) An element has its electronic configuration as 2, 8, 2. Now answer the following questions :
(a) What is the atomic number of this element ?
(b) To which period does this element belong ?

Q.2 (B)(iii) Complete the following reaction and give name of products :
\(\mathrm{CuSO_4(aq) + Fe(s) \rightarrow ......... + .........}\)

Q.2 (B)(iv) Define specific heat of an object. Write its SI and CGS units.

Q.2 (B)(v) Draw the electron-dot structure of methane (CH₄) and Ethane (C₂H₆).

Q.3 (i) Explain the concept ‘escape velocity’ in detail.

Q.3 (ii) Answer the following sub-questions regarding the modern periodic table :
(a) Write modern periodic law.
(b) Write the number of periods and groups.
(c) What is the valency of halogens ?

Q.3 (iii) State whether the following reactions are endothermic or exothermic :
(a) \(\mathrm{NaOH + HCl \rightarrow NaCl + H_2O + Heat}\)
(b) \(\mathrm{2KClO_3(s) \xrightarrow{\Delta} 2KCl(s) + 3O_2\uparrow}\)
(c) \(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2 + Heat}\)

Q.3 (iv) Identify figure and write one use of it :

[Three photographs: (a) two cartridge-type fuse wires with metal caps at both ends; (b) a miniature circuit breaker (MCB) with a switch lever; (c) an analogue ammeter with a pointer and a scale.]

Q.3 (v) How much heat energy is necessary to raise the temperature of 5 kg of water from 20ºC to 100ºC ?
[c = 1 kcal/kgºC]

Q.3 (vi) Write the Cartesian sign convention for lenses.

Q.3 (vii) Complete the following chart :

[Chart: three rows of three boxes joined in a grid. Top row: IRNSS — [blank] — [blank]. Middle row: [blank] — Weather Study and Predict — [blank]. Bottom row: [blank] — [blank] — Earth’s Observation.]

Q.3 (viii) Give the chemical equations for the following reactions :
(a) Thermit reaction
(b) Burning of magnesium in air
(c) Iron nail/dust is dropped in aqueous solution of copper sulphate.

Q.4 (i) “A rainbow is the combined effect of the refraction, dispersion and total internal reflection of light.” Prove this statement with the help of diagram and explain it.

Q.4 (ii) Complete the following table :