Science and Technology 1 Official 2023-2024 SSC (English Medium) 10th Standard Board Exam Question Paper Solution

The SI unit of heat energy is ______.

joule

calorie

kilo calorie

Cal/g °C

none of these

Kcal/kg

We can see the sun even when it is little below the horizon because of ______.

 Reflection of light

Refraction of light

Dispersion of light

Absorption of light

______ is the functional group of carboxylic acid.

\[\ce{-COOH}\]

\[\ce{-CO-}\]

\[\ce{-CHO-}\]

\[\ce{-OH}\]

In simple microscope ______ lens is used.

Concave

Plano concave

Plano convex

Convex

In ______ process a layer of molten tin is deposited on metals.

Anodization

Tinning

Galvanizing

Alloying

Write the name and symbol of the element from the description.

The atom having the smallest size.

Write the molecular formula of calcium carbonate.

Write the use of ‘Calorimeter’.

Identify the hydrocarbon from the given electron-dot structure:

\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{....}\ce{H}\phantom{}\\
\phantom{}\ce{H}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{\overset{\bullet\phantom{.}\bullet}{\underset{\bullet\phantom{.}\bullet}{C}}}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{\overset{\bullet\phantom{.}\bullet}{\underset{\bullet\phantom{.}\bullet}{C}}}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{H}\phantom{}\\
\phantom{}\ce{H}\phantom{....}\ce{H}\phantom{}\\
\end{array}\]

Match the Columns:

Give scientific reason.

When the gas formed on heating limestone, is passed through freshly prepared lime water, the lime water turns milky.

Give a scientific reason.

Tungsten metal is used to make a solenoid type coil in an electric bulb.

Write scientific reason.

On exposure to air, silver articles turn blackish after some time.

State Dobereiner’s law of triad.

Give one example of Dobereiner's law of triad.

Identify the figure and explain their use.

What is meant by a satellite launch vehicle?

Name any one Indian satellite launch vehicle.

What is the free fall?

When is free fall possible?

If focal length of a convex lens is 20 cm at what is the power of the lens?

Select the appropriate options and complete the following paragraph:

(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).

On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.

What are the factors affecting the rate of chemical reaction?

Explain any one factor affecting the rate of chemical reaction.

Observe the following graph and answer the following questions:

1. What does the graph represent? 
2. What does the line AB represent?
3. What does the line BC represent?

Complete the following table by observing the given figures:

Figure →
Points ↓
(a) Name of the defect	______	______
(b) Position of the image	______	______
(c) Lens used to correct the defect	______	______

Write the properties of ionic compounds.

Observe the figure and answer the questions:

1. State Newton's universal law of gravitation.
2. If the distance between the two bodies is tripled, how will the gravitational force between them change?
3. What will happen to gravitational force, if mass of one of the object is doubled?

The orbit of a satellite is exactly 35780 km above the earth's surface and its tangential velocity is 3.08 km/s.

How much time the satellite will take to complete one revolution around the earth?

(Radius of earth = 6400 km.)

What is a solenoid?

Draw a neat diagram of a solenoid and name its various components.

Observe the given diagram and answer the questions:

1. Name the process shown in the figure.
2. Name the colour that deviates the most.
3. Name the colour that deviates the least.
4. Name any one phenomenon in nature which is based on the above process.
5. Define ‘spectrum’.

Observe the diagram given below and answer the questions:

1. Name the reactants in this reaction.
2. Which gas comes out as effervescence in the bigger test tube?
3. What is the colour change in the lime water?
4. In the above experiment instead of sodium carbonate which chemical can be used to get same products?
5. Write the use of acetic acid.