GS One‑Liners
high‑yield facts · smart revision
5107
facts
5107
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Latest facts first
| # | Question & Answer |
|---|---|
| 3901 |
Why are bacteria called prokaryotic cells?
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Because they lack a true nucleus and membrane-bound organelles.
|
| 3902 |
What does the cell theory state about the origin of new cells?
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New cells arise only from pre-existing cells.
|
| 3903 |
Why do we call the cell the basic unit of life?
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Because all living organisms are made up of cells.
|
| 3904 |
Why are organic compounds widely used in industry?
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They can be modified easily due to carbon’s bonding versatility.
|
| 3905 |
What is a major environmental concern related to detergents?
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Non-biodegradable detergents cause water pollution.
|
| 3906 |
What is a major advantage of detergents over soaps?
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Detergents do not lose effectiveness in hard water.
|
| 3907 |
Why were synthetic detergents developed?
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To work even in hard water without forming scum.
|
| 3908 |
Why does soap perform poorly in hard water?
-
Because it forms scum with calcium and magnesium ions.
|
| 3909 |
Why does soap work well in soft water?
-
Because it forms good lather in soft water.
|
| 3910 |
What harmful mixture is formed when ethanol is mixed with methanol?
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Denatured spirit.
|
| 3911 |
Why is ethanol used in sanitizers?
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Because it kills germs effectively.
|
| 3912 |
What is the common name for ethanol in daily use?
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Alcohol.
|
| 3913 |
Which group is found in carboxylic acids?
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The –COOH group.
|
| 3914 |
Which functional group is present in alcohols?
-
The –OH group.
|
| 3915 |
What do we call a specific atom or group that determines a compound’s chemical properties?
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A functional group.
|
| 3916 |
What is the simplest alkyne?
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Ethyne (acetylene).
|
| 3917 |
What is the simplest alkene?
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Ethene.
|
| 3918 |
What is the simplest alkane known?
-
Methane.
|
| 3919 |
What distinguishes alkynes from other hydrocarbons?
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They contain at least one triple bond.
|
| 3920 |
What kind of bonds are present in alkenes?
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At least one double bond.
|
| 3921 |
What kind of bonds do alkanes contain?
-
Only single bonds.
|
| 3922 |
What do we call compounds made only of carbon and hydrogen?
-
Hydrocarbons.
|
| 3923 |
Why are carbon–carbon bonds so strong and stable?
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Due to their small size and high bond strength.
|
| 3924 |
Why can carbon form stable bonds with many elements?
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Because it is tetravalent (forms four bonds).
|
| 3925 |
Why is carbon able to form such a large number of compounds?
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Because it shows catenation (self-linking ability).
|