GS One‑Liners
high‑yield facts · smart revision
5107
facts
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Latest facts first
| # | Question & Answer |
|---|---|
| 3926 |
What is a permanent way to protect metals from corrosion?
-
Alloying (e.g., stainless steel).
|
| 3927 |
What do we call coating a metal object using electricity?
-
Electroplating.
|
| 3928 |
What is coating iron with zinc called?
-
Galvanization.
|
| 3929 |
What two conditions are necessary for rusting?
-
Water and oxygen.
|
| 3930 |
What does iron form when it corrodes?
-
Rust.
|
| 3931 |
What do we call the slow eating away of metals?
-
Corrosion.
|
| 3932 |
What is solder made from?
-
Lead and tin.
|
| 3933 |
What makes stainless steel resistant to corrosion?
-
Chromium.
|
| 3934 |
What is bronze composed of?
-
Copper and tin.
|
| 3935 |
What is brass an alloy of?
-
Copper and zinc.
|
| 3936 |
During refining, what forms on the cathode?
-
Pure copper.
|
| 3937 |
In electrolytic refining of copper, what acts as the anode?
-
Impure copper.
|
| 3938 |
What is the most widely used method for refining metals?
-
Electrolytic refining.
|
| 3939 |
How are least reactive metals like gold extracted?
-
By roasting or simple heating.
|
| 3940 |
How are moderately reactive metals like iron extracted?
-
By carbon reduction.
|
| 3941 |
How are highly reactive metals like sodium extracted?
-
By electrolysis.
|
| 3942 |
Which technique is used to separate magnetic ores?
-
Magnetic separation.
|
| 3943 |
Which method is commonly used to concentrate sulphide ores?
-
Froth flotation.
|
| 3944 |
What is the waste product formed after flux combines with gangue?
-
Slag.
|
| 3945 |
What substance helps remove gangue in metallurgy?
-
Flux.
|
| 3946 |
What are the unwanted impurities mixed with ore called?
-
Gangue.
|
| 3947 |
Which mineral is profitable enough to extract metal from?
-
An ore.
|
| 3948 |
What do we call the natural substance containing metal compounds?
-
A mineral.
|
| 3949 |
Why is the reactivity series important?
-
It helps predict displacement reactions and extraction methods.
|
| 3950 |
Which metals are at the bottom of the reactivity series?
-
Silver and gold.
|