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    Holiday Homework Chemistry Class X

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    Chemistry revision

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    Holiday Homework Chemistry Class X

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    Chemistry revision

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    holiday homework chemistry class X

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    Chemistry revision

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    5 views2 pages

    Holiday Homework Chemistry Class X

    Uploaded by

    1540.13
    Chemistry revision

    Copyright:

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

    TARAPORE SCHOOL

    PRACTICE WORKSHEET (HOLIDAY HOMEWORK )

    SUBJECT – CHEMISTRY

    Q .1 ) Choose the correct options:-

    1.Compounds which are covalent but develop ions in solution are known as

    a) non polar covalent molecules b) polar covalent molecules c) Diatomic


    d) Monotomic

    2.In ………. Symbols the electrons present are represented with the help of dots

    a) Lewis b) Empirical c) Skeletal d) Condensed

    3.Sodium and chloride ions are held together by strong………………

    a) Electrostatics forces of attraction b) Covalent bonds


    c) Hydrogen bonds d) Electrostatic forces of Repulsion

    4. Nitrogen molecule contains a ……….. bond.

    a) Single b) double c) triple d) electrostatic

    5. Among the following the one which is composed of all the three kinds of bond(ionic;
    covalent and coordinate bond) is :

    A )Sodium chloride b)Ammonia


    c)Carbon tetrachloride d) ammonium chloride

    Q. 2 ) Draw the electron dot structure of ammonium ion and nitrogen molecule .
    Q.3) Beaker A contains solution of Nacl.
    Beaker B contains solution of chloroform.
    a) Which beaker will conduct electricity on passing current using electrodes
    through them ?
    b) What is the reason behind the conduction of electricity for both the beakers?

    Q.4) For each of the following pairs, predict which one has greater ionization
    energy and greater electron affinity?

    A) I, I- B) B, C C)Li, Li+
    Q.5) Select the correct order of radii of three species : Ca, Ca+ and Ca2+ : Assign
    suitable reason.

    A) Ca > Ca+ > Ca2+

    B) Ca2+ > Ca+ > Ca

    C) Ca+ > Ca > Ca2+

    D) Ca+ > Ca2+> Ca

    Q. 6) Answer the Following

    1) How does ionization potential vary across the period represented by the
    elements sodium to argon?

    2)What change occurs in electronegativity going down the group of alkali metals
    from lithium to caesium?

    3)Describe the change in metallic character associated with moving

    a) Across a period, b)Down a group.

    Q.7) Name the following:-

    (a) An alkali metal in. 3 and halogen in period 2

    (b) The noble gas with 3 shells?

    (C) The non metals present in. 2 and metals in period 3.

    (d) The element of period 3 with valency 4.

    (e)The element in period 3 which does not form oxide.

    (f) The element of lower nuclear charge out of Be and Mg.


    Q.8) On what factors the formation of an ionic compound depends?

    Q.9)Which conditions are necessary for the formation of co-ordinate bond?

    Q.10)Explain with the help of ionic equation and electron dot structural diagram
    the formation of the following electrovalent compounds.

    (i) NaCl
    (ii) MgCl2
    (iii) CaO

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