Class X Summer Vacation Holiday Homework (Page 2 of 3) in pdf

ECONOMICS ( FOR ALL STUDENTS)

Q1 Conduct Market survey in your Local area and enlist Primary, Secondary and Tertiary activities. Show on graph

in bars/pie chart.

Q2 Prepare a Budget of your house regarding total income and major expenditure, dependent and earning

members under all heads .

Subject : Science

Physics

Assignment -1

1. Define the term “electric current”.

2. Define the term ‘resistivity’ of a material.

3. How is a Voltmeter connected in the circuit to measure the potential difference between two points?

4. You have two metallic wires of resistances 6 ohm and 3 ohm. How will you connect these wires to get

the effective resistance of 2 ohm?

5. If the distance between two electric charges is doubled, how much will the force exerting between them

change to?

6. State Ohm’s law. “The resistance of a conductor is 1Ω.” What is meant by this statement?

7. Why are coils of electric toaster made of an alloy rather than a pure metal?

8. Why is the series arrangement not used for domestic circuits?

9. A wire of resistivity ‘r’ is stretched to double its length. How does it affect the (a) resistance (b)

resistivity

Q10(a) Which has more resistance: 100W bulb or 60W bulb?

(b) A wire of resistance 5W is bent in the form of a closed circle. What is the effective resistance between

the two points at the end of any diameter of the circle?

Q11 You have two metallic wires of resistances 6 ohm and 3 ohm. How will you connect these wires to get the

effective resistance of 2 ohm?

Q12: A torch bulb has a resistance of 1 Ω when cold. It draws a current of 0.2 A from a source of 2 V and

glows. Calculate

(i) the resistance of the bulb when glowing and

(ii) explain the reason for the difference in

resistance.

Subject : Chemistry

Q1. A compound ‘X’ is used for drinking, has pH=7. Its acidified solution undergoes decomposition in presence of

electricity to produce gases ‘Y’ and ‘Z’. The volume of ‘Y’ is double than ‘Z’, ‘Y” is highly combustible whereas ‘Z’ is

supporter of combustion. Identify ‘X’ ‘Y’ and ‘Z’ and write the chemical reactions involved.

Q2. Bhawna took a pale green substance ‘A’ in a test tube and heated it on the flame of a burner. A brown colour

residue ‘B’ was formed along with evolution of two gases with burning smell of sulphur. Identify ‘A’ and ‘B’. Write

the chemical equation involved.

Q3. A student took 2-3 g of a substance ‘X’ in a glass beaker & poured water over it slowly. He observed bubbles

along with hissing noise. The beaker becomes quite hot. Identify ‘X’. What type of reaction is it?

Q4. A student has mixed the solution of Lead (II) nitrate and potassium iodide.

What was the colour of the precipitate formed? Can you name the compound precipitated?

Write the balanced chemical equation for the reaction.

What type of reaction is it?

Q5. A student burnt a metal ‘A’ found in the form of ribbon. The ribbon burnt with a dazzling flame and a white

powder ‘B’ is formed which is basic in nature. Identify ‘A’ and ‘B’. Write the balanced chemical equation.

Q6. Astha has been collecting silver coins & copper coins. One day she observed a black coating on silver coins and

green coating on copper coins. Which chemical phenomenon is responsible for these coatings? Write the chemical

name for the Black and Green coatings?

Q7. A few drops of phenolphthalein indicator were added to an unknown solution ‘A’. It acquired pink colour. Now

another unknown solution ‘B’ was added to it drop by drop and the solution becomes colourless. Predict the

nature of ‘A’ and ‘B’.

Q8. Write the 10 chemical equations from chapter-1(Chemical Reactions & Equations)?

Q9.Do question answers of chapter 1 ie chemical reactions and equations in chemistry note book.

Subject : Biology

(A) HIGHER ORDER THINKING SKILL QUESTIONS-

Page 2 of 3

Class X Summer Vacation Holiday Homework Page 2

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