SSC (Marathi Semi-English) 10th Standard Board Exam [इयत्ता १० वी] - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Give scientific reason.

It takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly.

Which device is used to produce electricity? Describe with a neat diagram.

What is meant by specific heat capacity? 

How will you prove experimentally that different substances have different specific heat capacities?

Name and state the principle used to measure the specific heat capacity of a substance.

Read the following paragraph and answer the questions.

1. Heat is transferred from where to where?
2. Which principle do we learn about from this process?
3. How will you state the principle briefly?
4. Which property of the substance is measured using this principle?

Solve the following problems:

Equal heat is given to two objects A and B of mass 1 g. Temperature of A increases by 3°C and B by 5°C. Which object has more specific heat? And by what factor?

A calorimeter has mass 100 g and specific heat 0.1 kcal/ kg °C. It contains 250 gm of liquid at 30°C having specific heat of 0.4 kcal/kg °C. If we drop a piece of ice of mass 10 g at 0°C, What will be the temperature of the mixture?

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?

Explain the following term with an example.

Functional group

Write answer as directed.
Give any four functional groups containing oxygen as the heteroatom in it. Write name and structural formula of one example each.

Give names of three functional groups containing three different hetero atoms. Write name and structural formula of one example each.

Study the following procedure and answer the questions below:
1. Take 3 spheres of iron, copper and lead of equal mass.
2. Put all the 3 spheres in boiling water in a beaker for some time.
3. Take 3 spheres out of the water. Put them immediately on a thick slab of wax.
4. Note, the depth that each sphere goes into the wax.
i) Which property of substance can be studied with this procedure?
ii) Describe that property in minimum words.
iii) Explain the rule of heat exchange with this property.

Choose and write the correct option.

What is the type of the following reaction?

BaCl₂ + ZnSO₄ →  BaSO₄ + ZnCl₂

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.

Study the following principle and answer the question.
A force is excreted on the current carrying conductor. The direction of this force depends on both the direction of the current and the direction of the magnetic field. This force is maximum when the direction of current is perpendicular to the direction of the magnetic field.
a) By which law we can determine the direction of force excreted on the current carrying conductor.
b) In which electrical equipment this principle is used.
c) Draw a diagram representing construction of this equipment.
d) Write the working of this equipment in brief.

Study the following chemical reaction and answer the questions given below:

\[\ce{AgNO3_{(aq)} + NaCl_{(aq)} -> \underset{(Precipitate)}{AgCl_{(s)}}↓ + NaNO3_{(aq)}}\]

1. Identify and write the type of chemical reaction.
2. Write the definition of the above type of chemical reaction.
3. Write the names of the reactants and products of the above reaction.