SSC (Marathi Semi-English) १० वीं कक्षा - Maharashtra State Board Question Bank Solutions for Science and Technology 1

An object is held 20 cm away from a converging lens of focal length 10 cm. Find the position of the image formed.

Explain the term with examples.

Endothermic reaction  

Give scientific reason.

While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.

Electromagnetic induction means ______.

Identify the endothermic and exothermic reaction.

HCl + NaOH → NaCl + H₂O + heat

Identify the endothermic and exothermic reaction.

\[\ce{2KClO_{3(s)}->[\Delta] 2KCl_{(s)} + 3O2}\]

Identify the endothermic and exothermic reaction.

\[\ce{CaCO_{3(s)}->[\Delta] CaO_{(s)} + CO2}\]

At which position will you keep an object in front of a convex lens so as to get a real image of the same size as the object? Draw a figure.

Give a scientific reason.

Simple microscope is used for watch repairs.

Solve the following example.
5 cm high object is placed at a distance of 25 cm from a converging lens of focal length of 10 cm. Determine the position, size and type of the image.

Solve the following example.

An object kept 60 cm from a lens gives a virtual image 20 cm in front of the lens. What is the focal length of the lens? Is it a converging lens or diverging lens?

An element has its electron configuration as 2,8,8,2. Now answer the following questions.
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?

Identify the process given in following passage and draw neat labelled diagram showing the process.
          Electrolysis of molten mixture of alumina (melting point > 2000⁰C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na₃AlF₆) and fluorspar (CaF₂) are added in the mixture to lower its melting point upto 1000⁰C.

Choose and write the correct option. 

Which of the following astronauts travelled through space shuttle ‘Discovery’ first time?

At which position will you keep an object in front of convex lens to get a real image smaller than the object? Draw a figure.

Give scientific reasons.
While preparing dil. Sulphuric acid from concentrated conc. sulphuric acid in the laboratory the concentrated sulphuric acid is, add slowly to water with constant stirring.

Observer the following diagram and answer the questions.
a) Which eye defect is shown in this diagram?
b) What are the possible reasons for this eye defect?
c) How this defect is corrected, write it in brief?

Name the following diagram and explain the concept behind it.

Rewrite the following table so as to match second and third column with first column.

State Fleming’s Right Hand Rule.