Question
Differentiate between $\sigma$ and $\pi$ molecular orbital.
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Answer
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- Name the most metallic element in second period and most non-metallic element.
- Name the element with (a) largest atomic radius, (b) smallest atomic radius in third period.
- Name the element having general electronic configuration ns2 np4 in fourth period.
What is normality and formality? Explain.
Do they depend on temperature?
Do they depend on temperature?
What is the correct order of priority for following functional groups of organic compound in IUPAC nomenclature?
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ {\text{ O}}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \|\\-\text{COOH}-,-\text{OH},-\text{CHO},-\text{C}-$
→$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ {\text{ O}}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \|\\-\text{COOH}-,-\text{OH},-\text{CHO},-\text{C}-$
When 6.488 gm lead is treated with 1.002 gm oxygen $PbO _2$ is formed. It can form by heating $Pb \left( NO _3\right)_2$ also, in which percentage of oxygen is $13.38 \%$. Prove that it follows law of definite proportion.
→Write the state of hybridisation of central carbon atom in the following compounds and shapes of each of the molecules.
→- $ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{O}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ ||\\\text{CH}_3-\text{C}-\text{CH}_3$
- $(\text{CH}_3)_3\text{CCl}$
- $\text{HC}\equiv\text{N}$
Answer the following questions.
(i) Why group 1 elements form $M ^{+1}$ instead of $M ^{+2} ?$
(ii) Why second group elements form $M ^{+2}$ instead of $M ^{+1}$ ?
→(i) Why group 1 elements form $M ^{+1}$ instead of $M ^{+2} ?$
(ii) Why second group elements form $M ^{+2}$ instead of $M ^{+1}$ ?
There is only one electron in a hydrogen atom, yet many lines are visible in its spectrum, why?
pKa value of acids A, B, C, D are 1.5, 3.5, 2.0 and 5.0. Which of them is strongest acid?
Which of the following are isoelectronic species i.e., those having the same number of electrons?
$
Na^{+}, K^{+}, Mg^{2+}, Ca^{2+}, S^{2-}, Ar
$
→$
Na^{+}, K^{+}, Mg^{2+}, Ca^{2+}, S^{2-}, Ar
$