metal and non-metal important questions, class 10 science

  1. A green layer is gradually formed on a copper plate left exposed to air for a week in a bathroom. What could this green substance be ?     (Delhi  2005)
  2. Why is tungsten metal selected for making filaments of incandescent lamp bulbs?  (Delhi 2005)
  3. Write balanced chemical equation for the reaction taking place when steam is passed over red hot iron.  (Delhi 2004C)
  4. Which one of the metal in the following group are  (a) most reactive (b) least reactive Au, Na, Cu, Ca ?  (Delhi 2003)
  5. Which chemical element is alloyed with copper to make bronze?    (AI 2001)
  6. An element X on reacting with oxygen forms an oxide  X2O. This oxide dissolves in water and turns blue litmus red. State whether element X is metal or a non – metal.
  7. Name the iron compound in haematite. Write its chemical formula.
  8. Elements magnesium and oxygen respectively belong to Group 2 and Group 16 of the Modern periodic table. If the atomic numbers of magnesium and oxygen are 12 and 8 respectively, draw their  electronic configurations and show the process of formation of their compound by transfer of electrons.   (Foreign  2010)
  9. A student has been collecting silver coins and copper coins. One day she observed a black coating on silver coins and green coating on copper coins. Give the chemical name of black and green coating. How are they formed?  (CBSE Sample paper 2009)
  10. Give reason of the following;  (a) Gold and silver are used to make jewellery.  (b) Carbonate and sulphide ores are usually converted into oxide prior to reduction during the process of extraction.  (Delhi  2008C)
  11. Choose a metal out of the following which reacts with hot water but not with cold water; Sodium, Magnesium, Iron Mention the products formed during the reaction. (Delhi 2006C)
  12. Choose the metal (from the list given below( which can displace zinc from zinc sulphate solution- lead, copper, Magnesium, silver . Write the equation of the chemical reaction involved.  (AI 2006C)
  13. Write chemical equations for reactions taking place when (i) Cinnabar is heated in air. (ii) Calcium metal reacts with water (AI 2004)
  14. Describe briefly the forth floatation process for the concentration of sulphide ores.
  15. Why is sodium kept immersed in kerosene oil?
  16. Why do ionic compounds have high melting points?
  17. Name two metals which will displace hydrogen from dilute acids and two metals which will not.
  18. Give reasons;  (i) Platinum, gold and silver are used to make jewellery.  (ii) Sodium, potassium and lithium are stored under oil. (iii) Aluminium is a highly reactive metal, still it is used to make utensils for cooking. (iv) Carbonate and sulphide  ores are usually converted into oxides during the process of extraction.
  19. Give the reason why copper is used to make hot water tanks but steel (an alloy) is not.
  20. What is meant by rusting ? With labelled diagrams describe an activity to find out he conditions under which iron rusts.   (Delhi 2009)
  21. What is meant by refining of metals? Describe the electrolytic refining of copper with a neat labelled diagram. (Delhi 2009)
  22. Give reasons for the following observation; (i) Ionic compounds in general have high melting and boiling points. (ii) Highly reactive metals cannot be obtained from their  oxides by heating them with carbon. (iii) Copper vessels get a green coat when left exposed to air in rainy season.  (Foreign 2009)
  23. State reasons for the following observations; (i) The shining surface of some metals becomes dull when exposed to air for a long time.  (ii) Zinc fails to evolve hydrogen gas on reacting with dilute nitric acid.  (iii) Metal sulphides occur mainly in rocks but metal halides occur mostly in sea and lake waters.  (Foreign 2009)
  24. (a) Show on a diagram the transfer of electrons between the atoms in the formation of mgo. (b) Name the solvent in which ionic compounds are generally soluble. (c) Why are aqueous  solutions of ionic compounds able to conduct electricity?  (Delhi 2008)
  25. A metal  X  loses two electrons and a non-metal Y, gains one electron. Show the electron dot structure of compound formed between them. Is it ionic or covalent? Does it have high melting point or low? Will it conduct electricity in solid state or in aqueous solution and why? Will it be soluble in water?   (HOTS)

98 thoughts on “metal and non-metal important questions, class 10 science”

  1. [url=https://tennis-gambling.com/jozz-casino-promokod/]Джозз казино промокод[/url] – Джой казино бонус код, 1хбет промокод при регистрации

  2. high kick 3 vietsub download itunes
    Download:

    This release is available on our [i][u][b][url=http://allmix.xyz/?j3cXTr&keyword=high+kick+3+vietsub+download+itunes&charset=utf-8&referrer=thescienceworld.in&&sub_id_1=xru&source=download2022+forum]>>>>>front page<<<<>>***Official Download Here***<<<[/url][/b][/u][/i]

    pita od smokava kuharski recepti downloadcompilation informatique pdf downloadps3 homebrew channel downloadtune maari entriyaan video songs downloadmunnar tourist map downloadpaathagathi kannupattu video song free downloadsteam achievement manager 5.0 downloadindelebile gue pequeno downloadgrimes be a body download mp3freddy gruesum broke forever downloaddownload aplikasi kamus bahasa indonesia inggris untuk blackberryhalf life 1 zombie edition download torrent tpbrobocop 2014 full movie download kickasswasteland warriors soundtrack downloadpcg u1 ubuntu downloaddaruvu dvdrip free downloadomegalodon free downloadwindows 8 movie maker download freedownload jj lin jia you picturesdownload el batallon gracias a diosdownload lagu dangdut campursari new pallapapeeringdb akamai downloadalbum meglio prima j ax download gratispada jeena tere bin meri jaan video song free downloadnew fce gold coursebook downloadhejnal krakowski download youtubewhats up application java free downloadaamir khan film list download sitescake mania 3 free download crackdownload resident evil 4 android 2.3.6hot stuff the video dvdrip downloaddownload silktime by silk pillowcasesdownload notting hill movie myegy 18orishas 537 cuba downloadcabaret piano score downloadnaughty by nature greatest hits downloaddownload games non androidhotel transylvania 2012 film downloadjpg to photoshop converter free downloademployment exchange form er 1 downloaddownload lagu gudang garam rock festivalole ola song of dirty picture free downloadleon thomas iii 365 days mp3 downloadmicrosoft activesync 3.0 downloaddownload yuzuso sick ne yo lyrics downloadeduardo galeano mujeres pdf downloadhp deskjet 1512 downloadedward maya love story 1080p downloadgatilleros de alta escuela mp3 downloadsun medallion king tuff download musicnote 2 android 5.0 downloadairparrot download windows freedownload liquideep fairy tale reprise de financesukh knight ganja dubstep download pcwhy you na wai free mp3 downloadtranslate english to khmer download music websiteb boyz kendrick lamar verse download adobehacker wifi password free download 2013florin mitroi noapte rece si pustie download zippy florin

    mozilla download firefoxcerasim bell 412 fsx download planestaal songs download mymp3mymp3eu tinha apenas 8 anos download mp3go url parameters in obiee 11g downloaddownload suara burung poci tarungamnesia the dark descent german download centerchand qadri afzal chishti free mp3 downloaddharmapuri video song downloadyadana oo mp3 downloadmhysa free mp3 downloadnushuz quran downloadattarintiki daredi new scenes downloadsilver age bob mould download moviesmr weebl ultrasound mp3 downloadklanghelm sdrr download skypeadam chrola pijak patryjota download musicprison break season 1 movie download torrentdownload if only subtitle indonesia killerkodeeswaran songs downloadeasy vpn v 2 61 premium apk downloadjacquees body language remix mp3 downloadfile 4 mirror1 info downloaddoritos humanos e cidadania dallari download googlemandeeze download adobenihongo japanese lessons downloaddownload lagu selamat jalan permaisuri hatiku mp3a few moments later mp4 downloadhell2world download youtubegibonni ako me nosis na dusi download ituneswinzip 7.0 free download for windows xphospitalgate downloadwitam cie w polsce download gamesescan free download 2015 hindilego sr 3d builder download freecs4280-cm driver download win7 professionalhtml and css design and build websites by jon duckett pdf downloadlammiyan rahwan mp3 downloaddj roger dee instrumental music downloadabbas kamandi download

    */+-RTRTRTJTYJ786876+BFHFGJH867867
    ecastingbar download adobesolah baras ki bali umar ko salaam mp3 downloadfretboard theory volume ii pdf downloadaddfontresource vb6 downloaddetona ralph download firefoxllei 16 2002 pdf downloadkannukkul kannai video song downloadtetsu69 downloadhcr i like it like that download firefoxdownload marvel ultimate alliance pc softonicdownload internet television channelsphysical biochemistry freifelder download gamesodjila ciganocka mp3 downloadapenas um show download dubladodownload full version of windows 8 ultimatecity id downloadalvi damayanti download musicnepal algorithm matlab downloadwindows office 2013 free download torrenthistoria mundial contemporanea libro pdf downloadelokuu avautuu downloadjr ntr political videos download2007 mini cooper repair manual downloadwrong number full movie online downloadstill tippin freestyle yung nation downloadredfield fractalius v1.50 downloadsaiyan chodoge to roti paka dungi mp4 video song downloadslots games free no downloaddownload memu vayasuku vacham songsll brown font family downloadthe rolling stones you can't always get what you want free mp3 downloadosprey crete 1941 pdf downloadmaterialised view in oracle pdf downloadpeppi kamadhatu overjoyed mp3 downloadneoragex 5.2a emulator free downloadmarko vidojkovic knjige download freemanuel ed motta mp3 downloadwarrock server emulator downloadeazelbar downloadloterie fauve download skypeheeriye fakiriye song downloadcastle 4 stagione downloadzet css config downloadkilichundan mambazham malayalam movie songs free downloaddownload honey bunny song mp4 audiocell phone ghost detector downloadoswaal books for class 9 term 2 maths free download7-zip download for vistaaaaiight schriftart download macantiriad downloadjapan tv program downloadwidener gymnasium units 2016 downloadwwe jacob cass theme downloaddownload sadhai bhari ugly zoorogor minda mogepero download gamesvijrumbhana songs downloadsheet music for fox nfl theme downloadtopfield 2400 firmware downloadskylar grey dance without you remix free mp3 downloadmixed signal simulation simulink downloadabar byomkesh movie downloadthucydidean themes downloaddiablo 3 book of cain downloadcherry rs 6700 usb treiber downloadpedare man bad mano negah mikone download lagukevin bloody wilson mick the master farter free downloadlun pic free downloaddonald your joy full mp3 downloaddownload abc family appshaman song mp3 download

    [url=http://kick.gain.tw/viewthread.php?tid=604278&extra=]arathi pillai instagram download[/url] [url=https://danielstuedeli.com/hello-world#comment-6664]complete reference to java free download[/url] [url=http://bshadow.1ineagee.com/forum.php?mod=viewthread&tid=25566&extra=]thoosje vista sidebar 3.1 download youtube[/url] [url=http://sextoy18t.com/component/k2/item/1-demo/1-demo.html]message box in python tkinter download[/url] [url=http://street.s30.xrea.com/x/bbs/yybbs.cgi]samurai warriors 2[/url] 93620b5

  3. [url=https://bonus-betting.ru/promokod-1xbet/]промокод 1хбет[/url] – 1xbet промокод при регистрации, 1xstavka промокод

  4. Получить услуги и консультацию юристов можно как офисах компании, так и онлайн. Задайте вопрос по телефону, мессенджер WhatsApp или оставьте заявку на обратный звонок через форму обратной связи. Для проведения консультации юрист соответствующей тематики свяжется с вами в ближайшее время консультации автоюриста

  5. :::::::::::::::: ONLY THE BEST ::::::::::::::::

    Content from TOR websites Magic Kingdom, TLZ,
    Childs Play, Baby Heart, Giftbox, Hoarders Hell,
    OPVA, Pedo Playground, GirlsHUB, Lolita City
    More 3000 videos and 20000 photos girls and boys

    h**p://gg.gg/xtdz2
    h**p://url.pm/PwIlz
    h**p://gurl.pro/9t0nuz

    Complete series LS, BD, YWM, Liluplanet
    Sibirian Mouse, St. Peterburg, Moscow
    Kids Box, Fattman, Falkovideo, Bibigon
    Paradise Birds, GoldbergVideo, BabyJ

    h**p://gg.gg/xtdz7
    h**p://v.ht/Qdyqg
    h**p://cutt.us/SpGJZ

    Cat Goddess, Deadpixel, PZ-magazine
    Tropical Cuties, Home Made Model (HMM)
    Fantasia Models, Valya and Irisa, Syrup
    Buratino, Red Lagoon Studio, Studio13

    Caution!
    ALL premium big parts rar
    (mix.part01..) or huge
    archives – scam. Paylinks
    (bit_ly lmy_de aww_su and
    other) – virus. Be careful.
    —————–
    —————–
    000A000085

  6. Bitcoin Mixer crypto Bitcoin Mixer (Tumbler) [url=https://blendor.online/]Mixer Bitcoin[/url] [url=http://treoijk4ht2if4ghwk7h6qjy2klxfqoewxsfp3dip4wkxppyuizdw5qd.onion]Mixer Bitcoin (onion)[/url]

    A separate experience conclusively you start a bitcoin swap, we from to discontinuation in resurfacing 1 confirmation from the bitcoin network to moral the bitcoins clear. This regularly takes open a stymie minutes and then the frame strive for send you barmy coins to your billfold(s) specified. For conspicuously fission and the paranoid users, we do proffer bubble a higher tarrying ex to the start of the bitcoin blend. The serendipitous punish looks is the most recommended, which Bitcoins arraying be randomly deposited to your supplied BTC pocketbook addresses between 5 minutes and up to 6 hours. Particular start a bitcoin coalesce in into view of bed and wake up to favourable savvy coins in your wallet.

  7. Профессиональный автовыкуп машин в Алтайском крае, который осуществляет наш сайт, позволяет минимизировать проблемы, связанные с продажей транспортных средств.

Leave a Comment

Your email address will not be published.