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Carbon: An Important Element — Science STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9ScienceCarbon: An Important Element1 Mark
Question
1. ………………..+………………..$\rightarrow C O+2 H _2 O +$ Heat
2. ………………..+………………..$\rightarrow HCl + Cl + HCl$
3. $2 NaOH + CO _2 \rightarrow$.………………..+………………..
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Answer

(a) $CH _4+2 O _2 \underset{\text { light }}{\longrightarrow} CO _2+2 H _2 O +$ Heat
(b) $CH _4+ Cl _2 \stackrel{ }{ } \stackrel{\text { light }}{\longrightarrow} CH _3 Cl + HCl$
(c) $2 NaOH + CO _2 \longrightarrow Na _2 CO _3+ H _2 O$
(d) $2 NaHCO _3+ H _2 SO _4 \longrightarrow Na _2 SO _4+2 H _2 O +2 CO _2 \uparrow$
(e) $CaCO _3+2 HCl \longrightarrow CaCl _2+ H _2 O + CO _2 \uparrow$

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