Maharashtra Board Class 10 Science and Technology Part 1 Important Questions 2027 (Repeated in Board Exams)

State Kepler's three laws.

Distinguish between mass and weight.

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?

In ................ of the modern periodic table, are the non-metals found. (A) s-block (B) p-block (C) d-block (D) f-block

Give scientific reason: Elements belonging to the same group have the same valency.

Give scientific reason: Atomic radius goes on increasing down the 'group'.

Write demerits of Mendeleev's periodic table.

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

Complete the co-relation: Cooking of food : Chemical change :: Evaporation of water : ................ .

State the factors affecting the rate of chemical reaction. Explain any one of it.

What is meant by decomposition reaction? Write the chemical reaction of decomposition of sugar on heating.

CuSO4(aq) + Zn(s) -> ZnSO4(aq) + Cu(s). This is ................ type of chemical reaction. (A) displacement (B) double displacement (C) combination (D) decomposition

Give scientific reason: Tungsten metal is used to make a solenoid type coil in an electric bulb.

State the laws: (a) Right hand thumb rule. (b) Fleming's left hand rule.

................ device is used to produce electricity. (A) Electric motor (B) Galvanometer (C) Electric generator (D) Voltmeter

Find the odd one out: Loudspeaker, microphone, electric motor, magnet.

Give scientific reason: For electric power transmission, copper or aluminium wire is used.

Identify figure and write one use of it: (a) fuse (b) miniature circuit breaker (MCB) (c) galvanometer.

Observe the following diagram (an appliance with a coil between magnetic poles N and S) and answer: (a) Identify the above diagram. (b) Write the principle on which the above appliance works. (c) Write the working of the above appliance. (d) Write the use of the above appliance.

(a) What is meant by Regelation? (b) What is the effect of pressure on melting point of ice? (c) Write any one example of regelation.

Label the following diagram (Hope's apparatus with two thermometers T1 and T2) and name the property that can be studied using it: A ...... , B ...... degreeC.

Read the paragraph and answer: [context: heat is exchanged between a hot and cold object until both attain the same temperature in an isolated system]. (a) Heat is transferred from where to where? (b) Which principle do we learn from this process? (c) How will you state the principle briefly?

'A rainbow is the combined effect of refraction, dispersion and total internal reflection of light'. Explain the sentence.

What is the wavelength of violet ray in dispersion of light?

What is angle of refraction when angle of incidence is 0 degree?

Match the Columns: Column 'A' - Refractive index of water; Column 'B' - (a) 1.31 (b) 1.36 (c) 1.33

The absolute refractive index of water is 1.33. What is the velocity of light in water? (Velocity of light in vacuum = 3 x 10⁸ m/s).

The focal length of a convex lens is 40 cm. What is its power?

Match the columns: Column 'A' - Simple microscope; Column 'B' - (a) used to observe minute objects (b) used to see distant objects (c) used for watch repair

Observe the following figure and answer: (a) Name the defect of vision represented in the above figure. (b) State the reasons for this defect. (c) How is it corrected? (d) Draw the diagram to show the correction of this defect.

Define: (a) Ores (b) Gangue.

Give scientific reason: Sodium is always kept in kerosene.

................ is the functional group of carboxylic acid. (a) -OH (b) -CHO (c) -NH2 (d) -COOH

Identify the hydrocarbon from the given structural formula: H-C-C-H with hydrogen atoms shown on each carbon (ethane structure).

Observe the figure and answer: (a) Which gas is released out as effervescence in the big test tube? (b) What is the colour change in the lime water? (c) Write the related chemical equation.

................ is one of the combustible component of L.P.G. (A) Ethane (B) Propane (C) Methane (D) Ethene

Read the passage and answer: [context: space debris - non-functional satellites and launcher parts revolving around the earth that can damage satellites]. (a) What is meant by space debris? (b) How can it be harmful to the artificial satellites? (c) What efforts are being taken to manage it?

Complete the following table (Type of satellite / Function / names of Indian satellite series and their launch vehicles): (a) location fixing, (b) Weather satellite, (c) IRS with launcher PSLV.

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.