GS One‑Liners
high‑yield facts · smart revision
5107
facts
5107
results
Latest facts first
| # | Question & Answer |
|---|---|
| 3951 |
Which metal lies just above hydrogen in the reactivity series?
-
Lead.
|
| 3952 |
Which metal is at the top of the reactivity series?
-
Potassium.
|
| 3953 |
Why do non-metals tend to form negative ions?
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Because they gain electrons.
|
| 3954 |
Why do metals form positive ions?
-
Because they lose electrons easily.
|
| 3955 |
What gas is produced when metals react with acids?
-
Hydrogen gas.
|
| 3956 |
What kind of oxides are formed by non-metals?
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Acidic or neutral oxides.
|
| 3957 |
What type of oxides do metals generally form?
-
Basic oxides.
|
| 3958 |
Which non-metal is the hardest known natural substance?
-
Diamond.
|
| 3959 |
Why do non-metals break when hammered?
-
They are brittle.
|
| 3960 |
Which non-metal is a good conductor of electricity?
-
Graphite.
|
| 3961 |
Which metal is a poor conductor of electricity despite being a metal?
-
Lead.
|
| 3962 |
What makes metals good conductors of heat and electricity?
-
Presence of free electrons.
|
| 3963 |
Why can metals be stretched into wires?
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Because they are ductile.
|
| 3964 |
Why can metals be beaten into sheets?
-
Due to their malleability.
|
| 3965 |
Why do metals shine when freshly cut?
-
Because they are lustrous.
|
| 3966 |
What physical state do most metals exist in?
-
They are generally solid (except mercury).
|
| 3967 |
What happens when a base reacts with a non-metal oxide?
-
Formation of salt and water
|
| 3968 |
What happens when an acid reacts with a base?
-
Salt + Water (neutralization)
|
| 3969 |
What happens when an acid reacts with a metal?
-
Salt + Hydrogen gas
|
| 3970 |
What is the use of Plaster of Paris?
-
Setting fractured bones, making molds, construction décor
|
| 3971 |
What is the use of baking soda?
-
Baking, antacid, fire extinguishers
|
| 3972 |
What is the use of washing soda?
-
Cleaning agent, softening hard water, glass manufacturing
|
| 3973 |
How is Plaster of Paris prepared?
-
Heating gypsum (CaSO₄·2H₂O) to remove water molecules
|
| 3974 |
How is baking soda prepared?
-
Reaction of NaCl, ammonia, water, and CO₂ (Solvay process step)
|
| 3975 |
How is washing soda prepared?
-
Heating baking soda followed by recrystallization
|