Sample paper Science and Technology part-1 set-1

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

Exam

Instructions: 1. It is necessary to solve all the questions. 2. Draw neat and labelled diagrams wherever necessary. 3. Start every new main question on separate page. 4. Figures on the right indicate marks. 5. For each Multiple Choice Question (1.B), ONLY first answer will be considered. 6. Write answer of each MCQ with option number. Eg. i) a………. ii) c…………..

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

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

   a) The amount of water vapour in air is determined in terms of its …………

   b)  If objects of equal masses are given equal heat, their final temperature will be different. This is due to difference in their ……………...

   c) During transformation of liquid phase to solid phase, the latent heat is………….

   d) When two or more reactants combine in a reaction to form a single product, it is called a ……………

   e) The chemical reaction in which two or more products are formed from a single Reactant is called……………….

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

      1)    A student obtained clear image of window grills on the screen. But the teacher told him to get the image of a tree far away, instead of window. To get a clear image, the lens must be............................

a) Moved towards the screen.           b) Moved away from the screen.

c) Moved behind the screen.              d) Moved far away from the screen.

      2)     What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?

a) Cu, Fe, Zn, Al            b) Al, Cu, Fe, Zn

c) Zn, Al, Cu, Fe            d) Fe, Zn, Al, Cu

      3)    In which block of the modern periodic table are the non-metals found?

                 (a) s-block   (b) p-block   (c) d-block    (d) f-block

     4)    What will be the weight of a person on earth, who weighs 9N on the moon?

      a) 3 N         b) 15 N       c) 45 N        d) 54 N

     5)    Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Which of the following elements be present in the same group as X.

a)     Na                   (b) Mg         (c) Al                    (d) Si

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

1. Statement 1: Electric current (flow of electrons) creates heat in the resistor.

    Statement 2: Heat in the resistor is created according to the rule of energy           conservation.

Explain Statement 1 with the help of Statement 2.

2. Swarali has got the following observations while doing an experiment. Answer her questions with the help of observations.

Swarali observed that the light bent away from the normal, while travelling from dense medium to rarer medium. When Swarali increased the values of angle of incidence (I), the values of angle of refraction (r) went on increasing. But at a certain angle of incidence, the light rays returned into the dense medium.

So, Swarali has some questions. Answer them –

a) Name this certain value of ‘i ’. What is the value of ‘r’ at that time?

b) Name this process of returning of light in dense medium. Explain the process.

3. What is the correct reason for blinking / flickering of stars? Explain it.

a) The blasts in the stars.

b) Absorption of star light by the atmosphere.

c) Motion of the stars.

d) Changing refractive index of gases in the atmosphere.

4. Atomic number of metal ‚A‛ is 11, while atomic number of metal ‚B‛ is 20. Which of them will be more reactive? Write the chemical reaction of dilute HCl with metal ‚A‛.

5. Draw electron - dot structure and structural formula of methane.

6. If mass of a planet is 8 times that of the earth and its radius is twice the radius of the earth, what will be the escape velocity of that planet? (Escape velocity for the earth – 11.2 km/s)

7. What are space expeditions? Explain their need and importance in your words.

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

      1)     Elements belonging to the same group have the same valency. Give reason

      2)     A stone thrown vertically upwards with initial velocity u reaches a height ‘h’ before coming down. Show that the time taken to go up is same as the time taken to come down.

     3)     The masses of the earth and moon are 6 x 1024 kg and 7.4x1022 kg, respectively. The distance between them is 3.84 x 105 km. Calculate the gravitational force of attraction between the two?

     4)     When the gas formed on heating limestone is passed through freshly prepared lime water, the lime water turns milky. Give reason.

    5)     For electric power transmission, copper or aluminium wire is used. Give reason

     6)     What is the role of anomalous behaviour of water in preserving aquatic life in regions of cold climate?

Q4)   Attempt any one of the following                                                             [5]

       1)      Explain anomalous behaviour of water using Hope’s apparatus with suitable diagrams

2)    Explain the construction and working of Electric motor draw a neat diagram and label it.