SELECT * FROM question_mgmt as q WHERE id=1735 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=56 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

Classify each of the following solids as ionic, metallic, molecular, network (covalent) or amorphous.

(i) Tetra phosphorus decoxide (P4O10)           (vi) Plastic

(ii) Ammonium phosphate (NH4)3PO4            (vii) Graphite

(iii) SiC                                                        (viii) Brass  

(iv) I2                                                           (ix) Rb

(v) P4                                                          (x) LiBr                                            

(xi) Si

Answer:

(i) Tetra phosphdecoxide (P4O10)  → Molecular

(ii) Ammonium phosphate (NH4)3PO4  → ionic

(iii) SiC → Network (Covalent)

(iv) I2 → molecular

(v) P4 → Molecular

(vi) Plastic → Amorphous

(vii) Graphite → Network (Covalent)

(viii) Brass → Metallic

(ix) Rb → Metallic

(x) LiBR → Ionic

(xi) Si → Network (Covalent)


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