Quiz: Take The 10th Grade Science Test Paper!

25 Questions | Total Attempts: 813

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Quiz: Take The 10th Grade Science Test Paper!


Questions and Answers
  • 1. 
    In which one of the following solution the bulb will not glow when electric current passed through it?
    • A. 

      Tap water

    • B. 

      Hydrochloric acid

    • C. 

      Glucose solution

    • D. 

      Dilute sulphuric acid

  • 2. 
    Guard tube containing anhydrous calcium chloride is used to
    • A. 

      Absorb water from air

    • B. 

      Absorb colored component

    • C. 

      Absorb N2 from air

    • D. 

      Absorb O2 from air

  • 3. 
    Which of the following statements is correct about an aqueous solution of an acid and of a base? (i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid (iii) Lower the pH, stronger the base (iv) Lower the pH, weaker the base
    • A. 

      (i) and (iii)

    • B. 

      (ii) and (iii)

    • C. 

      (i) and (iv)

    • D. 

      (ii) and (iv)

  • 4. 
    Which of the following statements is true with regard to hydrogen? (i) Hydrogen reacts to attain a duplet of electrons in its K shell. (ii) Hydrogen always forms a single covalent bond. (iii) Hydrogen can form a single and a double covalent bond.
    • A. 

      (i)

    • B. 

      (i) and (ii)

    • C. 

      (i) , (ii) and (iii)

    • D. 

      (i) and (iii)

  • 5. 
    Which of the following compounds of carbon does not consist of ions?
    • A. 

      CHCl3

    • B. 

      CaCO3

    • C. 

      NaHCO3

    • D. 

      Ca2C

  • 6. 
    6. Which of the following statements is not true? (i) In the earth’s crust carbon is present in the form of minerals. (ii) In the atmosphere very less amount of carbon is present. (iii) In the earth’s crust very large amount of carbon is present.
    • A. 

      (i)

    • B. 

      (i) and (iii)

    • C. 

      (iii)

    • D. 

      (ii) and (iii)

  • 7. 
    An element reacts with oxygen to give a compound with high melting point. This compound is also soluble in water. The element is likely to be
    • A. 

      Calcium

    • B. 

      Carbon

    • C. 

      Silicon

    • D. 

      Iron

  • 8. 
    Which of the following pairs will give displacement reaction
    • A. 

      NaCl solution and copper metal

    • B. 

      MgCl2 solution and aluminium metal

    • C. 

      FeSO4 solution and silver metal

    • D. 

      AgNO3 solution and copper meta

  • 9. 
    An iron nail is dipped in copper sulphate solution. It is observed that
    • A. 

      The colour 0f the solution remain unchanged

    • B. 

      The colour 0f the solution becomes red

    • C. 

      The colour of the solution turns to light green

    • D. 

      None of these

  • 10. 
    Which of the following is not true for metalloids?
    • A. 

      They are borderline elements that exhibit both metallic and non metallic properties to some extent

    • B. 

      They usually act as electron donors with non-metals and as electron acceptors with metals

    • C. 

      Some of these elements are boron, silicon and germanium

    • D. 

      They are good conductors of heat and electricity

  • 11. 
    For a given value of  ‘n’, the ionization energy is highest for a
    • A. 

      D-electrons

    • B. 

      F-electrons

    • C. 

      P-electrons

    • D. 

      S-electrons

  • 12. 
    Which of the following statement (s) about the Modern Periodic Table are incorrect (i) The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number (ii) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses (iii) Isotopes are placed in adjoining group (s) in the Periodic Table (iv) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number
    • A. 

      (i) only

    • B. 

      (i), (ii) and (iii)

    • C. 

      (i), (ii) and (iv)

    • D. 

      (iv) only

  • 13. 
    Which of the following is the correct order of decreasing first ionization energy:
    • A. 

      C > B > Be > Li

    • B. 

      C > Be > B > Li

    • C. 

      B > C > Be > Li

    • D. 

      Be > Li > B > C

  • 14. 
    The first ionization energy of an element is 736 kJ per mole of atoms. An atom of this element in the ground state has a total of how many valence electrons?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 15. 
    In the figure,
    • A. 

      6 W , 3 W and 9 W are in series

    • B. 

      9 W and 6 W are in parallel and the combination is in series with 3 W

    • C. 

      3 W , 6 W and W are in parallel

    • D. 

      3 W , 6 W are in parallel and 9 W is in series

  • 16. 
    When batteries are places in a flashlight, the positive terminal of one is connected to the negative terminal of the next. Why?
    • A. 

      So electricity can flow from the battery to the flashlight to a complete circuit

    • B. 

      So the current is slowed as it enters the next battery

    • C. 

      So the voltage is increased as it enters the next battery

    • D. 

      So electromagnetic interference is reduced

  • 17. 
    A parallel plate capacitor contains a positively charged plate on the left, and a negatively charged plate on the right. An electron in between the plates is moved to the right. Which statement is true?
    • A. 

      The potential energy of the electron is increasing and it is moving to a region having a lower potential

    • B. 

      The potential energy of the electron is increasing and it is moving to a region having a higher potential

    • C. 

      The potential energy of the electron is decreasing and it is moving to a region having a lower potential

    • D. 

      The potential energy of the electron is decreasing and it is moving to a region having a higher potential

  • 18. 
    Which of the following property of a proton can change while it moves freely in a magnetic field? ( there may be more than one correct answer)
    • A. 

      Mass

    • B. 

      Speed

    • C. 

      Density

    • D. 

      Momentum

  • 19. 
    Two bulbs marked 200 watt-250 volts and 100 watt-250 volts are joined in series to  250 volts supply. Power consumed in circuit is
    • A. 

      33 watt

    • B. 

      67 watt

    • C. 

      100 watt

    • D. 

      300 watt

  • 20. 
    The electric field 2.8 cm from a small object points towards the object points towards the object with a strength of 180,000N/C. what is the object’s charge
    • A. 

      +17nC

    • B. 

      -16nC

    • C. 

      -17nC

    • D. 

      +16nC

  • 21. 
    When a current 'I' flows through a resistance 'R' for time 't' the electrical energy spent is given by
    • A. 

      I R t

    • B. 
    • C. 
    • D. 
  • 22. 
    The value of the following is given by 100 (kilo ampere ) x ( micro ampere ) 100 milli ampere * 10 ampere
    • A. 

      0.001 A

    • B. 

      0.1 A

    • C. 

      1 A

    • D. 

      10A

  • 23. 
    With age Near point and Far point recedes due to A : Weakening of ciliary muscles B : Reducing ability to change the focal length
    • A. 

      'A' is correct

    • B. 

      B' is correct

    • C. 

      Both 'A' and 'B' are correct

    • D. 

      Neither 'A' nor 'B' is correct

  • 24. 
    A long-sighted person cannot see objects nearer to his eye than 50 cm. To enable him to read a book 25 cm away, he should use spectacle lenses whose power in dioptres is
    • A. 

      -6

    • B. 

      -4

    • C. 

      -2

    • D. 

      +4

  • 25. 
    Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
    • A. 

      Dispersion of light

    • B. 

      Scattering of light

    • C. 

      Total internal reflection of light

    • D. 

      Reflection of light from the earth

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