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प्रश्न
From the metals: copper, iron, magnesium, sodium, and zinc, select a different metal in the case which arranges the above metals in the decreasing order of reactivity.
उत्तर
Na > Mg > Zn > Fe > Cu
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संबंधित प्रश्न
The most common ore of iron is ________. (Calcium / Haematite)
What is rust? Give the equation for the formation of rust ?
Name the following:
The chief metal which occur in nature in free state as well as in combined state.
Define the term : Mineral
Name the process of concentration
(a) Based on densities
(b) Based on magnetic nature.
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.
Write the equation for the reaction of zinc of the following: Copper sulphate solution
A to F below relate to the source and extraction of either zinc or aluminium.
- Bauxite
- Coke
- Cryolite
- Froth floatation
- Sodium hydroxide solution
- Zinc blende
Write the formula of cryolite.
Find the odd one out of the following and explain your choice.
Sulphur, Phosphorous, Carbon, Iodine
Cassiterite is an are of:-
