CLASS X -CHAPTER WISE QUESTIONS FOR SA I Practice by Rabi Sir

SA I

CHEMICAL REACTIONS AND EQUATIONS

CHEMISTRY PREPARATORY

Q. PAPER

MARKS-30 TIME- 70 MINUTES

Instructions:

· Questions : 1 to 5 – 1 Mark each

· Questions : 6 to 9 – 2 Marks each

· Questions : 10 to 13 – 3 Marks each

· Question 14 – 5 Marks

1. On what chemical law, balancing of chemical equation is based?

2. Identify the compound oxidized in the following reaction:

H2S (g) + Cl2 ® S (s) + HCl (g)

3. Give an example of photochemical reaction.

4. Name the reaction which forms insoluble salts.

5. Name the product obtained and type of reaction given below:

Na2SO4 + BaCl2 ® _________ + ________

6. Explain the following in terms of gain or loss of oxygen with one example:

a. Oxidation

b. Reduction

7. A copper coin is kept in a solution of silver nitrate for some time, what will happen to the coin and

the colour of the solution?

8. Why do we apply paint on iron articles?

9. What happens chemically when quicklime is added to water?

10. What is rancidity? Write the common methods to prevent it.

11. What is corrosion? State the conditions necessary for rusting of iron. How rusting is harmful?

12. Name the type of reactions in the following cases:

a. Garbage producing foul smell

b. Burning of natural gas.

c. Carbon dioxide gas passed through lime water.

13. Blue crystals of copper sulphate on heating in a dry test tube become colourless. Give reasons.

14.

a. Why can not a chemical change be normally reversed?

b. Why is it always essential to balance a chemical equation?

c. What happens when CO2 gas is passed through lime water and why does it disappear on

passing excess CO2?

d. Can rusting of iron take place in distilled water?

ELECTRICITY

PHYSICE PREPATORY I

Q. PAPER

MARKS-30 TIME- 70 MINUTES

Instructions:

· Questions : 1 to 5 – 1 Mark each

· Questions : 6 to 9 – 2 Marks each

· Questions : 10 to 13 – 3 Marks each

· Question 14 – 5 Marks

1. Define resistivity of material.

2. What is the power of torch bulb rated at 2.5V and 500mA?

3. Why series arrangement not used for connecting domestic electrical appliances in a

circuit?

4. Which has higher resistance – a 50W bulb or a 2.5W bulb and how many times?

5. What is the direction of flow of conventional current?

6. Why is it not advisable to handle electrical appliances with wet hands?

7. Two electric bulbs marked 100W 220V and 200W 200V have tungsten filament of same

length. Which of the two bulbs will have thicker filament?

8. How does the resistance of a wire vary with its area of cross section?

9. Draw the following symbols

i) Battery ii) Switch closed

iii) Resistor of resistance R iv) Voltmeter

10. A geyser is rated 1500W, 250V. This geyser is connected to 250V mains. Calculate –

i) The current drawn

ii) The energy consumed in 50hrs.

iii) The cost of energy consumed at Rs. 2.20 per kWh.

11. What is the function of an electric fuse? Name the material used for making fuse. In

household circuit where is fuse connected?

12. Write one important advantage of using alternative current. How alternating current differ

from direct current?

13. What is the difference between short circuiting and overloading?

14. a) Draw diagram showing three resistors R1, R2 and R3 in series.

b) Two resistors of resistance 4W and 12W

i) In parallel

ii) In series

Calculate the values of effective resistance in each case.

LIFE PROCESS

BIOLOGY PREPARATORY

Q.PAPER

MARKS-30 TIME- 70 MINUTES

Instructions:

· Questions : 1 to 5 – 1 Mark each

· Questions : 6 to 9 – 2 Marks each

· Questions : 10 to 13 – 3 Marks each

· Question 14 – 5 Marks

1. Name the site of photosynthesis.

2. What is osmoregulation?

3. Name the excretory unit of kidney.

4. What is neuron?

5. Name the term for transport of food from leave to other parts of the plant.

6. Draw the diagram of cross – section of a lead and label the following in it:

a. Chloroplast

b. Guard cell

c. Lower epidermis

d. Upper epidermis

7. What do you mean by double circulation of blood?

8. Explain why Bile juice does not contain any digestive enzymes, yet it is essential for digestion.

9. How would non – secretion of hydrochloric acid in our stomach affect food digestion? Explain.

10. How does nutrition takes place in Amoeba?

11. Draw a diagram of cross section of human heart. Show the path of flow of blood with the help

of arrows.

12. How water is transported upwards in plants?

13. Descried the functioning of nephrons.

14.

a. Draw a diagram of human alimentary canal.

b. Label the following – oesophagus, liver, gall bladder, and duodenum.

c. What is the function of liver in human body?