Advertisements
Advertisements
प्रश्न
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
उत्तर
The zinc ore that gives CO2 on treatment with a dilute acid is calamine.
Its chemical formula is ZnCO3.
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word:
Bronze is an alloy of copper and .........
How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.
When an object made of metal A is kept in air for a considerable time, it loses its shine and becomes almost black due to the formation of a layer of substance B. When an object made of another metal C is kept in damp air for a considerable time, it gets covered with a green layer of substance D. Metal A is the best conductor of electricity whereas metal C is the next best conductor of electricity.
(a) What is metal A?
(b) What is metal C?
(c) Name the substance B.
(d) Name the substance D.
Aluminum is used in thermite welding:
what is thermit?
How an ore is concentrated by froth floatation process?
How many valence electrons are present in metals ?
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Explain Bayer’s process of concentration of bauxite with a chemical equation.
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
