SSC (English Medium) इयत्ता १० वी - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Fill in the blank:

The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.

Corrosion can be prevented by using ……………. solution.

Calculate the focal length of a corrective lens having power +2D.

Define ‘redox reaction’. Give one example.

Elements in the same group show the same valency. Give scientific reason.

Write the electronic configuration of K and Ne.

The chemical formula for rust is.............. .

Calculate the focal length of a corrective lens having power +2.5 D.

The atomic masses of three elements A, B and C having similar chemical properties are 7, 23 and 39, respectively.

1. Calculate the average atomic mass of elements A and C.
2. Compare the average atomic mass with atomic mass of B.
3. What could the elements A, B and C be?

Classify the following elements into metals, non-metals and metalliods

As, C, Hg, Mg, S, Si

Kavita from 10th is using spectacles. The power of the lenses in her spectacles is –2.5 dioptre. Answer the following questions:

1) Which lenses are used in her spectacles?

2) State the defect of vision Kavita is suffering from.

3) Find the focal length of the lenses used in her spectacles

Differentiate between Normal elements and Transition elements.

Define corrosion.

What is meant by rust?

Write the chemical formula of rust.

Which one of the following does not increase while moving down the group of the periodic table?

Give scientific reason.

It is reccommended to use air tight container for storing oil for long time.

Identify from the reaction the reactants that undergo oxidation and reduction.
Fe + S → FeS

Identify from the following reaction the reactants that undergo oxidation and reduction.

\[\ce{2Ag2O → 4 Ag + O2 \uparrow}\]

Identify from the reaction the reactants that undergo oxidation and reduction.

2Mg + O₂ → 2MgO