Science And Technology (212)
Tutor Marked Assignment
20% Marks Of Theory
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1. Answer any one of the following question in about 40-60 words.
(a) In the diagram shown alongside the displacement- position graph of a wave generated at O is shown after 0.1s. Calculate:
(i) Amplitude of the wave
(ii) Wave length
(iii) Frequency of the wave
(iv) Velocity of the wave
(b) You can join resistances in different ways to obtain resistances of different values. You are given three resistances of 3 ohm each. Draw diagrams to show their different combinations. Also, calculate the equivalent resistance of each combination.
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2. Answer any one of the following question in about 40-60 words.
(a) Calculate the amount of heat required to convert 100g of ice at – 40°C into steam at 100°C
Given: Latent heat of fusion of ice = 335 J/g
Latest heat of vaporization of water = 2260 J/g
Specific heat capacity of ice = 2.1 J/gx°C
Specific heat capacity of water = 4.2 J/gx°c)
(b) Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?
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3. Answer any one of the following question in about 40-60 words.
(a) Draw a labelled Diagram of a plant cell. Mention any three differences between a plant cell and an animal cell.
(b) Name the causative agent and describe the mode of transmission of Malaria. What are the symptoms of this disease? List any four preventive measures for controlling spread of Malaria.
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4. Answer any one of the following questions in about 100 to 150 words.
(a) The position of a moving body at various instants of time is tabulated below:
Draw a position-time graph for the motion. What type of motion does it depict? Describe the motion giving its 3 special features in numerical terms.
(b) The following diagram displays a chemical reaction. Observe carefully and answer the following questions.
(i) Identify the type of chemical reaction that will take place and define it. How will the colour of the salt change?
(ii) Write the chemical equation of the reaction that takes place.
Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in the figure.
