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    10th Pre Board

    Uploaded by

    Aditya Jangra

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    10th Pre Board

    Uploaded by

    Aditya Jangra
    3 views2 pages

    Original Title

    10th pre board

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    Copyright:

    © All Rights Reserved
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    3 views2 pages

    10th Pre Board

    Uploaded by

    Aditya Jangra

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    SECTION-A

    (Physies) Marks: 20]


    c a n nnt see
    . In Myopiu, a person
    (A) Nearby objects (B) Distant objects
    and (B) (D) None of these
    (C) Both (A)
    main reason
    behind the advanccd sunrise and delaycd sunset is the f light.
    2. The
    (A) Refraction
    (B) Reflection
    and (B) (D) None of these
    (C) Both (A)
    difference?
    Which of the 1ollowing
    can be used to measure the potential
    3.
    (A) Ammeter
    (B) Voltmeter

    (D) Nonc of these


    C)Both (A) and (B)
    of candle, the chemical energy converts into:
    During the burning
    a
    4.
    (A) Heat energy (B) Light energy
    (C) Both (A) and (B) (D) None of these
    oI source of ?
    5. What are the properties a good energy
    give a total resistance of 1 2?2
    of resistances 2 2, 3 2 and 6 2 be connected to
    6. How can three resistors

    must have c o n e across the three 'R's to save the environment:


    7. You
    Reduce, Recycle and Reuse. Explain Recycle in detail.
    in between the main focus (F) and optic centre (0) of a
    8. (a) An object is situated at a position
    nature of the image formed. 2
    convex lens. Draw the ray diagram showing the position, size and
    (1 D) power of a lens.
    (b) What is the power of a Lens ? Define one Dioptre
    in detail, the principle, construction and working
    of an clectric motor. Or
    9. Explain
    What the two safety measures commonly used in electric circuits and appliances ? Explain
    (a) are

    their working.
    (b) Draw the magnetic ficld lines around a bar mnagnet.

    SECTION-B [Marks: 19
    (Chemistry)
    exothermic reaction ?
    Which of the following is

    A) Decomposition of caleium carbonate by heat


    B)
    Decomposition of silver chloride by sunlight
    Sclence |HHJ 10th (8)

    C)Decompostiom of vegeluble muatter nto conpost


    hcut
    D) Decomponilion of leud nitrate by
    trcatment with chlorine yields bleachingg powder :
    Name the substunce which
    on
    I.
    (B) Sluked lime |Ca(OH),1
    (A) Gypum (CasO 21,0)
    (D) Lime stone (CaCO,)
    (C) Quick lime (Ca0)
    clement has a total ol Iwo shells, wilh th*e elcetrons in its valence shell?
    12. Which of the lollowing
    (B) Carbon (C)
    (A) Bomn (B)
    (D) Oxygen (0)
    C) Nitrogeu (N)
    reaction:
    13. Write the balanced chemical cquation lor the following

    Aluminium+ Copper Chloride Aluminium Chloride + Copper


    BraSS and CopPper vessels ?
    14. Why should curd and sour substances not be kept in

    1S. What are Isotopes 7 Give oe cxample.

    16. (a) Dillerentiatle betwcen Calcnation and Roasting. 2


    and two metals which will not. 2
    (b) Numne fwo metals whieh will displace hydrogen from dilute ucids
    17. (a) Define the terms Heteo atom und a sultiN. Expluin wilh exanples.

    the formation of bond in CH;C1 2


    (b) Explain the nature of covalent bond using
    (C) Draw siructure of Cyclohexane Or
    Give one exunple.
    ?

    () What do you mean by stnuctural ismers

    and why ?
    ()Which is good for health- 4
    vegetable oil or Animal fat
    (ii) Detergents are etlective in Hard Water also. Comment.

    SECTION-C
    Nebo (Life Science) IMarks: 211

    I8. Which of the tollowing


    A) Panereas
    gland secrectes growtlh hormone?

    (B) Adrenal
    4dO5512113'
    (C) Pituitary (D) Parathyroid

    19. ln which of the 1ollowing muluple Tission oCcur

    (A) Amoebu (B) Leishmania

    20.
    (C) Both (A) and (B)
    Whuch of the tollowing hormone promote he growih in plants
    (D) Plasodum
    106i
    (A) Auxin (H) Gibberellins
    (D) All of these
    (C)Cytukinin
    21. Whal is the function ol sperm tail

    22. Origin of Honosapicns Ccurred in

    2. Wnte down vanous toos which are used to study human cvolution,

    24. "Flow of energy Is unidirectional in ccosystem, cplain


    25. What happens at synape between two neurons

    26. Describe the importance f vanation


    27. What is Excretion "Deserie the stnture of nepthron with the help uf well labelled diagram
    Or

    How do iving things get their toxd anrho

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