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. A white crystalline solid X when heated forms a compound Y (which is red/orange when cold and yellow when hot), a brown gas Z an

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. A white crystalline solid X when heated forms a compound Y (which is red/orange when cold and yellow when hot), a brown gas Z and a colourless, odourless gas P (which is essential to living organisms). Identify X, Y, Z and write the chemical reaction involved. What is the nature of the chemical reaction taking place?

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Sadie

before Jesus Christ birth =BC
After death=AD
but when he was alive what we will call that time​

A good constitution doesn’t allow sudden whims to change its basic structure. Explain with the help of an example. Class8

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  1. Answer:

    X=NaHCO3 ; Y=Na2CO3 ; Z=CO2

    Explanation:

    carbon dioxide(Z) is an acidic oxide is produced on heating sodium bicarbonate (X) while the formation of sodium carbonate (Y).

    2NaHCO 3 (X)→Na 2
    CO3(Y)+CO 2 (Z)+H 2
    O


    The carbon dioxide gas is also given out when sodium bicarbonate reacts with an acid.

    NaHCO 3
    (X)+HCl→NaCl+CO 2
    (Z)+H 2
    O


    The sodium carbonate is formed if caustic soda is left open in the atmosphere.

    2NaOH+CO 2
    (Atmosphere)→Na 2
    CO 3 (Y)+H 2O

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