Reactive metals react with _____ water to produce hydrogen.
Reactive metals react with cold water to produce hydrogen.
2K(s)+2H20(l)→2KOH(aq)+H2(g)potassiumwaterpotassiumhydroxidehydrogen
State whether the following statements are true or false :
(a) All metals exist in solid form at room temperature.
(b) Coal can be drawn into wires.
(c) Non-metals react with dilute acids to produce hydrogen gas.
(d) Sodium is a very reactive metal.
(e) Copper displaces zinc from zinc sulphate solution.
(f) Rust formed on iron objects is basic in nature.
(g) Non-metals react with water to form a gas which burns with a 'pop' sound.
Fill in the blanks:
(a) Phosphorus is a very _________ non-metal.
(b) Metals are ________ conductors of heat and _________.
(c) Iron is ________ reactive than copper.
(d) Metals react with acids to produce _________ gas.
Correct the following statements :
(a) Hydrogen is used as a fuel for rocket propulsion.
(b) All metals react with acids to give hydrogen.
(c) Metals adsorb hydrogen.
(d) Very dilute nitric acid reacts with zinc to produce hydrogen.
(e) Conc.H2SO4 reacts with zinc to liberate hydrogen.