Question

In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ion ends up in

A. slag  
B. gangue
C. metallic calcium
D. calcium carbonate
Answer :   slag
Solution :
$$CaC{O_3}\mathop \to \limits^{Heat} CaO + C{O_2};$$
$$\mathop {CaO}\limits_{{\text{Flux}}} + \mathop {Si{O_2}}\limits_{{\text{impurity}}} \to CaSi{O_3}\left( {{\text{slag}}} \right).$$

Releted MCQ Question on
Inorganic Chemistry >> D and F Block Elements

Releted Question 1

When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is

A. $$1:1$$
B. $$1:2$$
C. $$2:1$$
D. $$9:4$$
Releted Question 2

Which of the following is the weakest base

A. $$NaOH$$
B. $$Ca{\left( {OH} \right)_2}$$
C. $$KOH$$
D. $$Zn{\left( {OH} \right)_2}$$
Releted Question 3

One of the constituent of German silver is

A. $$Ag$$
B. $$Cu$$
C. $$Mg$$
D. $$Al$$
Releted Question 4

Which of the following dissolve in hot conc.$$NaOH$$  solution

A. $$Fe$$
B. $$Zn$$
C. $$Cu$$
D. $$Ag$$

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D and F Block Elements


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