Question
What is nucleoside?
✓
Answer
Nucleoside consists of a base joined to sugar molecule, e.g., adenosine contains adenine and ribose, guanosine contains guanine and ribose, cytidine contains cytosine and ribose.
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Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Reason: $\text{E}_{\text{cathode}}<\text{E}_{\text{anode}}$
→- Both assertion and reason are true and the reason is the correct explanation of assertion.
- Both assertion and reason are true and the reason is not the correct explanation of assertion.
- Assertion is true but the reason is false.
- Both assertion and reason are false.
- Assertion is false but reason is true.
Reason: $\text{E}_{\text{cathode}}<\text{E}_{\text{anode}}$
Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.
The partial pressure of ethane over a solution containing $6.56 \times 10^{-3} g$ of ethane is 1 bar. If the solution contains $5.00 \times 10^{-2} g$ of ethane, then what shall be the partial pressure of the gas?
→Explain position of d-Block in periodic table.
Amongst the following compounds, identify which are insoluble, partially soluble and highly soluble in water?
(i) phenol $\quad$(ii) toluene $\quad$(iii) formic acid
(iv) ethylene glycol $\quad$(v) chloroform $\quad$(vi) pentanol.
→(i) phenol $\quad$(ii) toluene $\quad$(iii) formic acid
(iv) ethylene glycol $\quad$(v) chloroform $\quad$(vi) pentanol.
Write a note on acidity of phenols.
Complete the following reactions by identifying A, B and C.
$\ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\\ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\text{CH}_3-\text{C}-\text{C}-\text{CH}_3\ +\ \text{NaOI}\ \rightarrow\ \text{B}\ +\ \text{C}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ | \ \ \ \ \ \ || \ \\ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\text{O}$
→$\ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\\ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\text{CH}_3-\text{C}-\text{C}-\text{CH}_3\ +\ \text{NaOI}\ \rightarrow\ \text{B}\ +\ \text{C}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ | \ \ \ \ \ \ || \ \\ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\text{O}$
- Which alkyl halide from the following pair is chiral and undergoes faster SN2 reaction?
- Out of SN1 and SN2, which reaction occurs with
- Inversion of configuration.
- Racemisation.
Complete the following reactions by writing the major and minor product in each
case (any 2)
a. CH3CH2Br + KCN →
b. CH3CH2CH=CH2 + HBr →
c. (CH3)2CHCHCICH3 + alc KOH →
case (any 2)
a. CH3CH2Br + KCN →
b. CH3CH2CH=CH2 + HBr →
c. (CH3)2CHCHCICH3 + alc KOH →
(i) Give two methods in which $> C = O$ group is converted into $> C H _2$ group.
(ii) In the purification of aldehydes sodium bi-sulphite is used, why?
→(ii) In the purification of aldehydes sodium bi-sulphite is used, why?