Welcome to your classification of elements and periodicity in property
1.
Iron loses its magnetic property at:
2.
The purest form of iron is:
3.
Reaction in combustion zone of blast furnace:
4.
Reducing agent for pure haematite:
5.
Product when ferrous oxalate is heated:
6.
On igniting Fe₂O₃ at 1673 K:
7.
Ferric iron forms prussian blue with K₄[Fe(CN)₆] because of:
9.
Stainless steel vessels contain:
10.
Cassiterite is concentrated by:
11.
Galena ore is concentrated by:
12.
Wolframite is separated from tin stone by:
13.
Lime stone is added in iron extraction as:
14.
Tin stone contaminated with Wolframite—method:
15.
Reaction NOT taking place during copper smelting:
16.
Product when Fe reacts with dilute HNO₃:
17.
Slag produced in extraction of iron:
18.
Oxidation number of Fe in Fe₃O₄
19.
Iron sulphide heated in air gives oxide A. A + water forms an acid. Basicity of acid:
20.
Gives blood-red colour with KCNS
21.
Iron obtained from blast furnace:
22.
Heating steel then cooling slowly is called:
23.
Highly corrosive salt:
24.
Nature of aqueous FeCl₃:
25.
No. of ions from FeSO₄(NH₄)₂SO₄·6H₂O
26.
Oxidation state of Fe when potassium ferrocyanide is acidified with H₂O₂
28.
Wrought iron, pig iron & steel differ due to:
31.
Ferrosilicon used as:
32.
Ore containing copper and iron:
33.
In blast furnace Fe₂O₃ is reduced by:
34.
% of silver in German silver:
35.
Alloy containing Cu & Zn:
37.
Hot copper reacts with steam to give:
38.
Product when copper reacts with chlorine:
39.
Metal that does not react with copper sulphate:
40.
Ag is less reactive than Cu → no displacement.
41.
Gas evolved when CuS reacts with dilute HCl:
42.
On strongly heating copper nitrate, we get:
43.
What is formed when H₂S is passed through acidified solution of CuSO₄?
44.
What is produced when cuprous oxide reacts with HCl?
