TS 10th Class Physical Science Question Paper March 2024

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TS 10th Class Physical Science Question Paper March 2024

Parts – A and B

Time: 1 : 30 hrs.
Max. Marks: 40

Instructions :

1. Read the question paper and understand every question thoroughly and write answers in given 1 hr. 30 min. time.
2. 3 very short answer questions are there in section -1. Each question carries 2 marks. Answer all the questions. Write answer to each question in 3 to 4 sentences.
3. 3 short answer questions are there in section – II. Each question carries 4 marks. Answer all the questions. Write answer to each question in 5 to 6 sentences.
4. 3 essay type answer questions are there in section – III. Each question carries 6 marks. Answer any two questions. Write answer to each question in 8 to 10 sentences.

Part – A
Section – I (3 × 2 = 6 M)

Time: 1.15 hrs.
Marks: 30

Instructions :
i) Answer all the questions.
ii) Each question carries 2 marks.
iii) Write answer to each question in 3 to 4 sentences.

Question 1.
Write any two daily life uses of Baking soda.
Answer:
Uses of Baking soda:

1. Baking soda is added for faster cooking.
2. It is used as an ingredient in antacids.
3. It is also used in soda – acid fire extinguishers.
4. It acts as a mild antiseptic.

Question 2.
Write the required materials, chemicals for “esterification reaction” activity.
Answer:
Materials :
a) Test tube
b) Beaker
c) Tripod
d) Bunsen burner / Spirit lamp / Stove
e) Water
f) Wire guage

Chemicals:
a) Ethanol (Absolute Alcohol)
b) Glacial acetic acid
c) Con. sulphuric acid (H₂SO₄)

Question 3.
Guess and write, what changes may happen to the focal length and position of optic centre of a Convex lens, if it is broken into two pieces?
Answer:

• Situation 1:
  1. If lens is broken into two pieces as given in figure.
  2. No change in focal length.
  3. No change in optic center.
     
• Situation 2:
  • If lens is broken into two pieces as given in figure.
  • Focal length will change.
  • Optic center will also change.
    

Section – II (3 × 4 = 12 M)

Instructions :
i) Answer all the questions.
ii) Each question carries 4 marks.
iii) Write answer to each question in 5 to 6 sentences.

Question 4.
Mention the four physical methods of concentration of the ore and explain any two of them.
Answer:
Methods of dressing or concentration of the ore :
a) Hand picking : If the ore particles and the impurities are different in one of the properties like colour, size, etc. using that property, the ore particles are handpicked separating them from other impurities.

b) Washing : Ore particles are crushed and kept on a slopy surface. They are washed with controlled flow of water. Less densive impurities are carried away by water flow, leaving the more densive particles behind.

c) Froth floatation: This method is mainly useful for sulphide ores. The ore with impurities is finely powdered and kept in water taken in a flotation cell. Air under pressure is blown to produce froth in water. Froth so produced, takes the ore particles to the surface whereas impurities settle at the bottom. Froth is separated and washed to get ore particles.

d) Magnetic separation : If the ore or impurity, one of them is magnetic substance and the other is non-magnetic substance, they are separated using electromagnets.

Question 5.
Write any four applications of Faraday’s “Electromagnetic induction”, and explain any two of them.
Answer:
Applications of Faraday’s lawr of electromagnetic induction:
a) Entrance of security checking
b) Tape recorder / Tape player
c) ATM Card
d) Induction stove
e) A. C. generator/Dynamo
f) D. C. generator/Dynamo

i) Security checking: In the security check entrance, there will be a big coil in the frame. It produce weak AC magnetic field. If we are carrying any significant quantitites of iron, the magnetic flux linked with the large coil changes and the induced current generated in coil triggers and alarm.

ii) Tape recorder/Tape player: The cassete of the tape recorder consists a piece of plastic tape coated with iron oxide and is magnetised more in some parts than in others. When the tape mdves past the small coil of wire the magnetic field produced by the tape changes, which leads to generation of current in the small coil of wire.

iii) ATM Card : ATM card consists a black magnetic strip. When strip is swipped through a scanner there will be change in magnetic flux and leads to produce electric current.

iv) Induction stove : Induction stove consists a coil under its surface. Due to A.C. current it produces magnetic field. When a metal vessel is kept, on the stove, due to change in magnetic flux electric current is produced in the vessel.

v) A. C. generator / D. C. generator: When coil rotates in the magnetic field of generator, due to flux change in the coil electric current will be produced.

Question 6.
Observe the information given in the table. Answer the equations given below.

Element	Electronic configuration
Be	1s2 2s2
Mg	1s2 2s2 2p6 3s2
P	1s2 2s2 2p6 3s2 3p3
Ne	1s2 2s2 2p6

i) Which of the given are s -block elements?
Answer:
Be, Mg

ii) Which of the given has least valency?
Answer:
Ne.

iii) Which of the given is 15th Group element?
Answer:
p

iv) Which of the given are of same Period?
Answer:
Be, Ne (or) Mg, p

Section – III (2 × 6 = 12M)

Instructions:
i) Answer any two questions.
ii) Each question carries 6 marks.
iii) Write answer to each question in 8 to 10 sentences.

Question 7.
Draw the diagrams showing Myopia and its correction.
Answer:

Question 8.
Write the required material for the experiment to show that the ratio y is a constant for a conductor. Explain the procedure of the experiment.
Answer:
Required Materials:
a) 1.5 v. Batteries – 5
b) Ammeter
c) Voltmeter
d) Conducting wires
e) Iron spoke / Iron rod
f) Switch / Key

procedure:

1. 
2. Connect a circuit as shown in the figure.
3. Switch on the key and observe the readings of ammeter and voltmeter. Note them in the table. Switch off the key immediately.

4. Potential difference (v)	Electric Current (I)	V/I

5. Repeat the experiment by adding batteries two, three, four and five in series connection.
6. Calculate the \(\frac{\mathrm{V}}{\mathrm{I}}\) value in each case.
7. We will find that \(\frac{\mathrm{V}}{\mathrm{I}}\) value is constant.

Question 9.
Hydrogen reacts with Oxygen to produce water. What will be the mass of water produced if 100 grams of Hydrogen participated in the reaction? Calculate the number of molecules of water produced in this reaction. [Atomic masses : H = lu, 0 = 16u]
Answer:

Part – B

Time: 15 Minutes
Marks: 10

Instructions:
i) Answer all the questions.
ii) Each question carries 1 mark.
iii) There are 4 options A, B, C, D for each question. Select the correct option and write it in the bracket given infornt of the question.
iv) Write the answers of Part – B in Part – B only. And tie it to the answer sheet of Part – A. 2 3

Question 1.
Identify the correct shape of water molecule.

Answer:

Question 2.
Number of sub-shells in the main shell ‘M’ …….
A) l
B) 2
C) 3
D) 4
Answer:
C) 3

Question 3.
Which of the following gives the magnification for mirrors?
A) \(-\frac{u}{v}\)
B) \(-\frac{v}{u}\)
C) \(\frac{u}{v}\)
D) \(\frac{v}{u}\)
Answer:
B) \(-\frac{v}{u}\)

Question 4.
Name of the Carbon Compound

A) Ethanoic acid
B) Propanoic acid
C) Acetic acid
D) Propanone
Answer:
B) Propanoic acid

Question 5.
Which of the following element has more Atomic radius?
A) Li
B) Na
C) K
D) Rb
Answer:
D) Rb

Question 6.
Colour of Copper sulphate after removing water of crystallisation.
A) White
B) Blue
C) Green
D) Red
Answer:
A) White

Question 7.
A double convex lens has two surfaces of equal radii 20 cm. Then the focal length is
A) 10 cm
B) 20 cm
C) 40 cm
D) Depends on refractive index
Answer:
D) Depends on refractive index

Question 8.
Example for polar covalent bond.
A) BeCl₂
B) BF₃
C) HCl
D) CH₄
Answer:
C) HCl

Question 9.
Least energy orbital of the following.
A) 4s
B) 4p
C) 4d
D) 3d
Answer:
A) 4s

Question 10.
Characteristics of the image formed by a convex mirror,
i) Diminished
ii) Enlarged
iii) Inverted

A) (i), (iii)
B) (i), (iv)
C) (ii), (iii)
D) (ii), (iv)
Answer:
B) (i), (iv)