(A) Naoh + Hno3 == Nano3 + h20. and it is acid based reaction. (B) H + Br == Hbr. it is synthesis reaction and it should be hydrogen gas with bromine gas if that was question then H2 + Br2 == 2Hbr (c) 3Agno3 + Alcl3 == Al (No3)3 + 3Agcl it is double displacement. and we right the polyatomic ion in bracket that’s why no3 is in bracket. please let me know if you need something