GS One‑Liners
high‑yield facts · smart revision
5107
facts
5107
results
Latest facts first
| # | Question & Answer |
|---|---|
| 3976 |
What is Plaster of Paris chemically?
-
Calcium sulfate hemihydrate (CaSO₄·½H₂O)
|
| 3977 |
What is baking soda chemically?
-
Sodium hydrogen carbonate (NaHCO₃)
|
| 3978 |
What is washing soda chemically?
-
Sodium carbonate decahydrate (Na₂CO₃·10H₂O)
|
| 3979 |
What is neutralization?
-
Reaction between acid and base forming salt and water
|
| 3980 |
What is a salt?
-
Compound formed from neutralization of acid and base
|
| 3981 |
What is the pH of human blood?
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Around 7.4
|
| 3982 |
Why is pH important in daily life?
-
Useful in agriculture, medicine, food science, environmental tests
|
| 3983 |
What pH value indicates a basic solution?
-
More than 7
|
| 3984 |
What pH value indicates an acidic solution?
-
Less than 7
|
| 3985 |
What pH value indicates a neutral solution?
-
pH 7
|
| 3986 |
What is the pH scale range?
-
0 to 14
|
| 3987 |
What does pH measure?
-
Hydrogen ion concentration (acidity/basicity) of a solution
|
| 3988 |
What is the use of calcium hydroxide (Ca(OH)₂)?
-
Whitewashing walls, testing CO₂, soil treatment
|
| 3989 |
What is the use of sodium hydroxide (NaOH)?
-
Soap making, paper industry, cleaning agents
|
| 3990 |
What is the use of nitric acid (HNO₃)?
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Manufacture of explosives, fertilizers, dyes
|
| 3991 |
What is the use of sulfuric acid (H₂SO₄)?
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Manufacture of fertilizers, detergents, car batteries
|
| 3992 |
What is the use of HCl?
-
Cleaning metals, digesting food in stomach (gastric acid), industrial processing
|
| 3993 |
What is the colour of litmus in base?
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Blue
|
| 3994 |
What is the colour of litmus in acid?
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Red
|
| 3995 |
What is the taste/feel of bases?
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Bitter and slippery/soapy
|
| 3996 |
What is the taste of acids?
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Sour
|
| 3997 |
What is a weak base?
-
A base that partially dissociates (e.g., NH₄OH)
|
| 3998 |
What is a strong base?
-
A base that completely dissociates in water (e.g., NaOH, KOH)
|
| 3999 |
What is a weak acid?
-
An acid that partially ionizes in water (e.g., CH₃COOH)
|
| 4000 |
What is a strong acid?
-
An acid that completely ionizes in water (e.g., HCl, HNO₃, H₂SO₄)
|