Download App

Metallurgy — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryMetallurgy2 Marks
Question
What is passive iron?
✓

Answer

iron which cannot be easily acted upon by acidsis called as passive iron. Galvanized iron is called passive iron since coating of zinc protects the iron from corrosion as zinc is more electropositive and so would be attacked first.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[2 Mark Question Answer]" from Metallurgy→Metallurgy — all question types→Chemistry STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

How will you distinguished between dilute HCl and dilute $H _2 SO _4$ using lead nitrate solution?
→
Write balanced equation for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
→
Explain the following :
An all glass apparatus is used in the laboratory preparation of nitric acid.
→
Salts of [normal / transition] elements are generally coloured. From the ions $K ^{1+}, Cr ^{3+}$, $Fe ^{2+}, Ca ^{2+}, SO _3^{2-}, Mn _4^{1-}, NO _3^1$ the ions generally coloured are
→
Write the molecular formulae of the third and fifth members of homologous series represented by general formula $C_nH_{2n-2}.$
→
How are the following conversion brought about? Give equation and condition:
Dilute sulphuric acid to hydrogen.
→
Give two tests of the following:
Oxygen
→
Explain the following:
Ammonium nitrate is not used in the laboratory preparation of $NH_3.$
→
Why are conventional drying agent such as calcium oxide and phosphorus pentoxide not used for drying moist HCl gas? Give equations.
→
Give reason:
In the lab. preparation of ammonia
(i) calcium hydroxide is used in excess
(ii) a flask is fitted in slanting position
→