Choose terms from the options given in brackets to complete these sentences.
(a) When CuO reacts with hydrogen, .............. is reduced and ............... is oxidized to .............. . (CuO,H2,Cu,H2O)
(b) Hydrogen is ................ soluble in water. (Sparingly, highly, moderately)
(c) Metals like ................., ................. and ................ give H2 with steam.
(iron, magnesium, aluminium, sodium, calcium)
(d) Sodium .......... reacts smootly with cold water. (metal, amalgam, in the molten state)
(e) A metal ............. hydrogen in the activity series gives hydrogen with ............... acid or acid.
(above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).
Choose terms from the options given in brackets to complete these sentences.
(a) When CuO reacts with hydrogen, .............. is reduced and ............... is oxidized to .............. . (CuO,H2,Cu,H2O)
(b) Hydrogen is ................ soluble in water. (Sparingly, highly, moderately)
(c) Metals like ................., ................. and ................ give H2 with steam.
(iron, magnesium, aluminium, sodium, calcium)
(d) Sodium .......... reacts smootly with cold water. (metal, amalgam, in the molten state)
(e) A metal ............. hydrogen in the activity series gives hydrogen with ............... acid or acid.
(above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).
(a) (CuO,H2,H2O)
(b) sparingly
(c) iron, magnesium, aluminium
(d) amalgam
(e) above, dilute hydrochloric, dilute sulphuric.
(a) (CuO,H2,H2O)
(b) sparingly
(c) iron, magnesium, aluminium
(d) amalgam
(e) above, dilute hydrochloric, dilute sulphuric.
