Question

Q1.    Define one  Volt ?

Q2.    Name the chemical and its chemical formula which is used to keep the fractured bone in their place  .

Q3.    Name the place where ultra filtration takes place in the nephron.

Q4.     Write the S I units of electrical resistivity.

Q5.    An electric appliance draws a current of 0.4A where the voltage is 200 volts .  Calculate the amount of charge flowing through it in one hour.

                                                    Section B

Q6.   

Q7.    Explain with diagram the process of endocytosis in amoeba.

Q8.    Give two reasons why alloys are used in electrical heating devices . 

Q9.    Differentiate between arteries and veins (Any four).


Q10.    Calculate the total resistance of the circuit when three resistors of  3 ohms , 4 ohms and 12 ohms are connected in parallel. Draw the circuit diagram .

                                           

Q11.    Differentiate between series and parallel connection of resistors  . 


Q12.    Describe the steps involved in circulation of blood in human heart .

   

Q13.    A calcium compound is a white powder and is used as disinfectant .Name the compound, write chemical equation for its preparation  .

                                                    Section C

 Q14.   


Q15.    i)    Draw a labelled diagram of a nephron .

    ii)    Explain the important steps involved in urine formation.  

    

Q16.    i)    Salt A is used in bakery products . on heating salt A get converted into  another salt B which itself is used in removal of hardness of water. Along with salt B , gas C is also evolved . The gas C when pass through lime water , turns it milky. Identify A, B and C write the chemical equation for formation of B and C.

    ii)    Write the chemical equation for production of caustic soda .

Q17.    i)    What is photosynthesis ? Write the three steps of photosynthesis. And its complete chemical reaction  .

    ii)    Write two functions of lymph.




Q18.    i)     Study the given figure  and calculate the reading of ammeter .



    ii)    Study the given figure and calculate the reading of voltmeter .


this is my science exam paper​

Answer 1

Answer:

(a) What is the common name of the compound CaOCl

2

?

(b) Name the raw material used for the preparation of plaster of Paris.

(c) Which property of plaster of Paris is utilised in making casts for broken limbs in hospitals?

(d) Explain why chlorine is used for sterilising drinking water supply.

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ANSWER

(a) The common name of the compound CaOCl

2

is Bleaching powder.

(b) The raw material used for the preparation of plaster of Paris is Gypsum.

(c) The property of setting into a hard mass in about 30 mins is utilised in making casts for broken limbs in hospitals.

(d) Chlorine is used for sterilising drinking water supply because it is a disinfectant which kills germs or bacteria.

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