Sample paper science and technology part-1 set-2

Science and technology sample question paper based on Maharashtra state board - 2019

Sample paper 2                                                                                                          Time: 2 Hours Std 10th                             Sub. Science and Technology -1              Marks: 40

Q. 1 A) Solve the following questions.                                 [5]

a) If the height of the orbit of a satellite from the earth surface is increased the tangential velocity of the satellite will________

b) Substances having ester as the functional group are formed by reaction between a ___________and an alcohol.

c) Refractive index depends on the_____________ of light.

d) During transformation of liquid phase to solid phase, the latent heat is _______________

e) To prevent rusting, a layer of ______________ metal is applied on iron sheets.

Q 1 B) Choose and write the correct option.                       [5]

(i) The halogen which is liquid at room temperature is ___________

a) Fluorine            b) astetine             c) bromine d) iodine

(ii) Which of the following process to be carried out to avoid the formation of greenish layer on brass vessels due to corrosion?

a)     plating    b) anodization      c) tinning             d) alloying

(iii) The temperature of ice can be decreased below 0°C by mixing ____in it.

a) Saw dust          b) sand                 c) salt                   d) coal

(iv) The image obtained while finding the focal length of convex lens is____

a) a real and erect.          b) Virtual and erect.       c) Real and inverted.      d) Virtual and inverted.

(v) The reaction in which two or more product is produce from the single reactant is called____

          a) Combination reaction          b) decomposition reaction       c) displacement reaction        d) redox reaction  

Q 2. Solve ANY 5 from the following questions.                                               [10]

i) Observe the following reaction and answer the following questions.

a) Identify and write the type of chemical reaction.

b) Write the definition of above reaction.

ii) Light travels with a velocity 1.5 x 108 m/s in a medium. On entering second medium its velocity becomes 0.75 x 108 m/s. What is the refractive index of the second medium with respect to the first medium?

v) Why does tungsten metal used to make solenoid type coil in an electric bulb?

vi) Mahendra and Virat are sitting at a distance of 1 metre from each other. Their masses are 75 kg and 80 kg respectively. What is the gravitational force between them? G = 6.67 x 10-11 Nm2/kg2

Q3)   Answer the following questions (any five)                                               [15]

i) Observe the given figure and answer the following questions.

a) Identify and write the natural process shown in the figure.

b) List the phenomena which are observe in this process.

c) Redraw the diagram and show above phenomena in it.

ii) Identify the law shown in the figure and state three respective laws.

iii) An element has its electron configuration as 2,8,8,2. Now answer the following questions.

a) What is the atomic number of this element?

b) What is the group of this element?

c) To which period does this element belong?  

iv) Write the importance of artificial satellites in your words.

v) Observe the figure and answer the following questions.

a) Identify the machine shown in figure.

b) Write a use of this machine.

c) How transformation of energy takes place in this machine.

vi) Balance the following equation step wise.

vii) Identify the process given in following passage and draw neat labelled diagram showing the process.

Electrolysis of molten mixture of alumina (melting point > 2000°C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite ( Al ) and fluorspar (Ca ) are added in the mixture to lower its melting point up to 1000°C.

Q4)   Attempt any one of the following                                                       [5]

1)   Read the following paragraph and answer the questions.

If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy. The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistant box, then no energy can flow from inside the box or come into the box.

a) Heat is transferred from where to where?                                                       (1)

b) Which principle do we learn about from this process?                                   (1)

c) How will you state the principle briefly?                                                        (2)

d) Which property of the substance is measured using this principle?                (1)

ii) Observe the following figure and answer the questions.

a) Which optical instrument shows arrangement of lenses as shown in the figure?    (1)

b) Write in brief the working of this optical instrument.                                              (2)

c) How can we get different magnifications in this optical instrument?                      (1)

d) Draw the figure again and labelled it properly                                                         (1)



Also read sample paper science and technology part 1 set 1