30 Questions
What is the atomic number of hydrogen?
1
How many electrons are required to fill the K shell of a hydrogen atom?
1
What is the electronic configuration of helium, the nearest noble gas to hydrogen?
2
How many electrons are shared between two hydrogen atoms when they form a molecule of hydrogen, H2?
2
What type of bond is formed between two oxygen atoms when they share electrons?
Double bond
What is the valency of chlorine?
7
Which term is used to describe compounds with identical molecular formula but different structures?
Isomers
What is the molecular formula of benzene?
$C6H6$
Which type of hydrocarbons contain one or more double bonds?
Alkenes
How many carbon atoms are present in a cyclohexane molecule?
6
What is the term for hydrocarbons that contain only single carbon-carbon bonds?
Alkanes
Which type of carbon compound has atoms arranged in the form of a ring?
Cyclic carbon compounds
What causes a luminous flame in a gaseous substance?
Heating of the atoms
What characteristic property of an element is responsible for the unique color produced by each element?
Atomic structure
What is the yellow color of a candle flame attributed to?
Incomplete combustion resulting in soot
How were coal and petroleum formed according to the text?
Biological and geological processes acting on biomass
Why are coal and petroleum referred to as fossil fuels?
They are derived from ancient organic matter
What chemical reaction occurs when ethanol is gently warmed with alkaline potassium permanganate?
Oxidation reaction
What is the significance of carbon mentioned in the text?
Carbon is a versatile element found in many everyday items.
How much carbon is present in the Earth's crust as mentioned in the text?
0.02%
Based on the text, where is carbon mainly found in the atmosphere?
Mainly as carbon dioxide
What is the approximate amount of carbon present in the atmosphere?
0.03%
Why are food, clothes, medicines, and books mentioned in the text?
To highlight their dependence on carbon.
What is a key characteristic of carbon?
It forms compounds essential for life.
What is the unique orientation of soap molecules inside water that keeps the hydrocarbon portion out of the water?
Hydrophobic tails in the interior of the cluster and ionic ends on the surface of the cluster
Why does a soap solution appear cloudy?
Scattering of light by soap micelles
In what way do soap micelles help in cleaning?
By collecting oily dirt in the center of the micelle
What prevents soap micelles from coming together to precipitate?
Presence of ion-ion repulsion
Why does the hydrophobic 'tail' of soap not dissolve in water when at the surface of water?
It interacts with hydrocarbons instead
What is the main reason an oily dirt particle is easily rinsed away when surrounded by soap micelles?
Because dirt particles are collected in the center of the micelle
Learn about structural isomers in organic chemistry through examples of carbon skeletons with identical molecular formulas but different structures. Explore the concept of isomerism and the differences between straight and branched carbon compounds.
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