[4 marks Questions]

Question 14 Marks

Answer the following questions as directed : $(a)$ Give scientific reason: A fuse is kep in the path of domestic electri circuit. $(b)$ State the precautions to be take while using electricity.

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Question 24 Marks

Draw the diagram of an generator and describe its structure and working. electric

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Question 34 Marks

Draw the labelled diagram of human eye and explain the function of its main parts.

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Question 44 Marks

Draw the labelled diagram showing the internal structure of human heart and explain blood circulation in it.

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Question 54 Marks

Answer directed: the following questions as $(a)$ What is photosynthesis? Enlist the events that take place in process, giving the equation of photosynthesis. $(b)$ Give differences: Aerobic respiration and Anaerobic respiration

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Question 64 Marks

Answer the following questions as directed: $(a)$ Write the structural formulac of the following carbon compounds:$(1)$ Bromobutane $(11) 2$-pentanone $(b)$ Write two physical properties and two uses of ethanol.

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Question 74 Marks

Answer the following questions asdirected: $(a)$ Why is concentrated acid added to water for dilution? $(b)$ Explain with reason: Curd and soursubstances should not be kept in brass and copper vessels.

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Question 84 Marks

Describe an experiment showing the reaction of zinc granules with dilute sulphuric acide with diagram. Write the chemical equation of the reaction.

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Science [4 marks Questions]

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