Shweta Thakur posted an Question
July 13, 2020 โ€ข 22:59 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Plz explain thecovelent character of hydrides of alkali metal

plz explain thecovelent character of hydrides of alkali metal

3 Answer(s) Answer Now
  • 0 Likes
  • 6 Comments
  • 0 Shares
  • comment-profile-img>
    Priyanshu kumar

    Greater the polarizing power of cation or polarizability of an anion, greater are the percentage of covalent characters produced in an ionic compound. Covalent characters in ionic compound depends upon following factors. 1:-Smaller the size of cation, greater is its polarising power,thus greater will be the covalent nature of the bond. 2:-Larger the size of anion, greater is its polarizability thus greater will be the covalent nature of the bond . 3:-As the charge on ion increases, the electrostatic attraction of the cation for the outer electrons of the onion also increases, with the result its ability for forming the covalent bond increases. 4:-For the two ions of the same size and charge,one with pseudo noble gas configuration will be more polarizing than a cation with noble gas configuration. read little bit revision about fajans rule

    eduncle-logo-app

    yes sir this I know...I am only confused on solubility....

    eduncle-logo-app

    yes now your confusion gets clear na๐Ÿ˜Š

    eduncle-logo-app

    no sir

    eduncle-logo-app

    ask??

    eduncle-logo-app

    which is more soluble lih or nah

    eduncle-logo-app

    in water

    eduncle-logo-app

    shweta always keep in mind about like dissolve like pattern...means polarity same solubility same...and you know covalent character is inversely proportional to solubility...and Lih is more covalent than nah

    eduncle-logo-app

    always we are talking about ionic solubility...and comparing covalent solubility with respect to this

    eduncle-logo-app

    covelent compounds are weak

    eduncle-logo-app

    ionic compound are stronger than covalent due to coulombic interactions

    eduncle-logo-app

    we are conparing this things with respect to some thing not individually

    eduncle-logo-app

    sir covalent compound are non polar that's why they donot dissolve in water

    eduncle-logo-app

    because water is polar

    eduncle-logo-app

    yes like dissolve like...and covalent compounds are more soluble in oil and fats

    eduncle-logo-app

    sir

    eduncle-logo-app

    but nah is not a covelent compond

    eduncle-logo-app

    i am telling you previously na this is comparable thing

    eduncle-logo-app

    we are comparing with respect to something

    eduncle-logo-app

    ok

    eduncle-logo-app

    sir

    eduncle-logo-app

    fine

    eduncle-logo-app

    ๐Ÿ‘๐Ÿ˜Š

  • comment-profile-img>
    Priyanshu kumar

    https://www.toppr.com/guides/chemistry/hydrogen/hydrides/ for all hydrides questions and concepts

  • comment-profile-img>
    Priyanshu kumar best-answer

    got shweta..if any doubt then ask??

    eduncle-logo-app

    read fajan's rule and its applications...it helps you in this aspects

  • comment-profile-img>
    Dinesh khalmaniya 1 best-answer

    it is reverse of ionic characters Explanation:ย As the size of the metal cation increases down the group, the lattice energy of the hydrides decreases down the group. Consequently, the reactivity of the alkali towards hydrogen decreases down the group. iii. The ionic character of the alkali metal hydrides increases from Li to Cs. Explanation: Since ionisation enthalpy of alkali metals decreases down the group, tendency to form cations as well as the ionic character of the hydrides increases. so covalent characters decrease

    eduncle-logo-app

    The covalent character of the alkali metal hydrides decrease from Li to Cs.

    eduncle-logo-app

    LiH > NaH> KH > RbH > CsH

    eduncle-logo-app

    got it??

    eduncle-logo-app

    yes sir plz explain solubility again

    eduncle-logo-app

    so what is your doubt because it's related to fajan's rule. so if you wanna understand which factors affecting solubility please check fajan's rule

    eduncle-logo-app

    also solubility related to ioni6or covalent characters

    eduncle-logo-app

    I've sent to fajan's rule image in previous query please check it

whatsapp-btn

Do You Want Better RANK in Your Exam?

Start Your Preparations with Eduncleโ€™s FREE Study Material

  • Updated Syllabus, Paper Pattern & Full Exam Details
  • Sample Theory of Most Important Topic
  • Model Test Paper with Detailed Solutions
  • Last 5 Years Question Papers & Answers