Home
Class 11
CHEMISTRY
Calcium burns in nitrogen to produce a w...

Calcium burns in nitrogen to produce a white powder which dissolves in sufficient water to produce a gas (A) and alkaline solution. The solution on exposure to air produce a thin solid layer of (B) on the surface. Indentity the compound (A) and (B)

Text Solution

Verified by Experts

Ca burns in air to form CaO and `Ca_(3)N_(2)`.
`2 Ca + O_(2) overset(Delta)(to) 2 CaO , 3 Ca + N_(2) overset(Delta)(to) Ca_(3)N_(2)`
Calcium nitride on hydrolysis with `H_(2)O` gives ammonia (A)
`Ca_(3) N_(2) + 6 H_(2)O to 3 Ca(OH)_(2) + underset(A) (2 N)H_(3)`
The alkaline solution of `Ca(OH)_(2)` thus formed reacts with `CO_(2)` present in the air to form `CaCO_(3)` which being insoluble forms a thin solid layer on the surface .
`Ca(OH)_(2) + CO_(2) to underset(B)(CaC)O_(3) + H_(2)O`
Thus , A = `NH_(3)` and `B = CaCO_(3)` (white powder)
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • S-BLOCK ELEMENTS (ALKALI AND ALKALINE EARTH METALS)

    PRADEEP|Exercise Competition Focus JEE (Main and Advance)/Medical Entrance (I. Multiple Choice Questions (With One Correct Answer))|1 Videos

  • S-BLOCK ELEMENTS (ALKALI AND ALKALINE EARTH METALS)

    PRADEEP|Exercise Competition Focus JEE (Main and Advance)/Medical Entrance (Multiple Choice Questions (With One Correct Answer))|33 Videos

  • S-BLOCK ELEMENTS (ALKALI AND ALKALINE EARTH METALS)

    PRADEEP|Exercise Analytical Questions and Problems with Answers/Solutions (Questions)|17 Videos

  • REDOX REACTIONS

    PRADEEP|Exercise Assertion reason type question|16 Videos

  • SOLID STATE

    PRADEEP|Exercise Advanced problems|19 Videos

Similar Questions

Explore conceptually related problems

Calcium burns in nitrogen to produce a white powder which dissolves insufficient water to produce a gas A and an alkaline solution. The solution on exposure to air produces a thin solid layer of b on the surface. Indentify the compounds A and B .

Calcium bums in nitrogon to produce a white powder which dissolves in sufficient water to produce a gas (A) and an alkaline solution. The solution on exposure to air produces a thin solid layer of (B) on the surface. Identify the compounds A and B.

Knowledge Check

  • Which one of the following salts will produce an alkaline solution while dissolving in water ?

    A
    `NH_(4) Cl`
    B
    `Na_(2) CO_(3)`
    C
    `NaNO_(3)`
    D
    `Na_(2) SO_(4)`

  • The indicator which produces a pink colour in an alkaline solution is:

    A
    methyl orange
    B
    turmeric
    C
    litmus paper
    D
    phenolphthalein

  • Sodium nitroprusside when added to an alkaline solution ions produces a colouration which is :

    A
    red
    B
    blue
    C
    brown
    D
    purple

    • Similar Questions

    Explore conceptually related problems

    Calcium burns in nitrogen to produce a white powder which dissolve in sufficient water to produce a gas A and an alkline solution .The solution on esposure to air produces a this solid layer of B on the surface identify the compound A and B.

    Calcium burns in nitrogen a white solid which sufficient water to produce a gas (A) and an alkaline solution. The solution o nexposure to air produces a solid layer of (B) on the surface. Identify the compound (A) and (B).

    An element (A) of group 2 gives brick red colour in the Bunsen flame. (A) burns in nitrogen atmoshphere to give (B) , which gets hydrolysed to produce gas (C ) and an alkaline solution (D) . The solution (D) on exposure to air produces a thin solid layer (E) on the surface. Identify (A) to (E) .

    Anhydrous white solid (A) on addition of potassium iodine solution gave a brown precipitate which turned white (B) on addition of excees of hypo solution. When potasium cyanide is added to an aqeous Solution of (A) a white precipitate is formed which then dissolved in excess forming (C ) A Solution (%) of (A) on adding to a solution of white portion of egg produced violet colouration in alkaline medium (i.e) in presence of NaOH) identify compound (A) and explain the reactions.

    A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains:

    Home
    Profile