Chemistry Question Bank

In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu2O with (JIPMER 2018)

Wolframite (FeWO4), present as an impurity in cassiterite (SnO2), can be removed by the process of

In the froth-floatation process, the sulphide ores are concentrated by mixing the ore with

In the froth-floatation process, the ore particles float because

Sulphide ores are generally concentrated by the

Concentration of ores is not done by the

Silicon is the main constituent of

The ore of calcium which contains phosphorus is

The metal which mainly occurs as oxide ore in nature is:

Among the following, the most abundant metal in the earth’s crust is

The impurities present in a mineral are called

Which of the following statements is correct?

An element whose electronic configuration is 4s13d10. The possibility of element is

The maximum temperature that can be achieved in blast furnace is: (NEET 2021)

Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature? (NEET 2021)

Identify the correct statement from the following: (NEET 2020)

Assertion: Cryolite is used in electrolytic extraction of Al from alumina. Reason: It dissolves alumina.

Assertion: All the ores are mineral. Reason: Ores contains metals in combined state

Assertion: Al2O3 is converted into Al by reduction with carbon at high temp. Reason: Carbon has greater affinity for oxygen than aluminium.

Assertion: Lead, tin and bismuth are purified by liquation method. Reason: Lead, tin and bismuth have low m.p. as compared to impurities.

Assertion: In froth flotation process sodium ethyl xanthate is used as collector. Reason: Sulphide ores are water soluble.

Which of the following has maximum iron content? (AIIMS 2019)

Identify the incorrect statement. (Odisha NEET 2019)

Which one is malachite from the following? (NEET 2019)

Assertion: Wrought iron is more malleable and ductile than steel. Reason: It contains slightly less percentage of carbon.