Of the following on combustion can never form soot? charcoal, methane, cng, hydrogen,
kerosene​

Joints that allows only a back and forth movement

Which type of cost iron is widely used for machine base, tables, side ways and for machine tools​

Nahco,, na, cox, caoci,, caso, yh, o, hcl, naoh(1) name the reaction when hcl and naoh combined.(ii) what is the use of na, co,? (111) which one is strong acid and strong base? (iv) what is the use of nahco,? (v) what is the use of caso, 12 h, o? (vi) what is the use of caoci,? ​