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प्रश्न
From the metals copper, iron, magnesium, sodium and zinc, select a different metal in each case which:
(a) Does not react with dilute hydrochloric acid
(b) Can form 2+ and 3+ ions
(c) Has a hydroxide that reacts with both acid and alkalis.
(d) Does not react with cold water, but reacts with steam when heated.
उत्तर
(a) Copper
(b) Iron
(c) Zinc
(d) Magnesium
APPEARS IN
संबंधित प्रश्न
State the main components of the following alloys:
Brass
Name the process by which impure ore of aluminium gets purified by using the concentrated solution of an alkali.
Name an ore of zinc.
What is the role of cryolite `(Na_3AIF_6)` in the electrolytic reduction of alumina in Hall’s process?
From the metals: copper, iron, magnesium, sodium, and zinc, select a different metal in the case which can form 2+ and 3+ ions.
Name the following :
Ore of iron referred to as "fool's gold".
Define and explain the meaning of the term ore.
State the main components of the following alloy:
Duralumin
Explain concept with example/explain with the help of a balanced equation.
Ores
Which of the following statements are correct?
(i) A depressant prevents certain type of particle to come to the froth.
(ii) Copper matte contains \[\ce{Cu2S}\] and \[\ce{ZnS}\].
(iii) The solidified copper obtained from reverberatory furnace has blistered appearance due to evolution of \[\ce{SO2}\] during the extraction.
(iv) Zinc can be extracted by self-reduction.
