Question
Give IUPAC names of the following structures.
✓
Answer
- 4-ethyl-3-propylhept-1-ene.
- 3-chloro-4-cyclopropyl-1,2 cyclobutandiol.
- Butan-2, 3-diol.
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Calcium carbonate reacts with aqueous HCl to give $CaCl _2$ and $CO _2$ according to the reaction, $CaCO _3(s)+2 HCl ( aq ) \rightarrow CaCl _2( aq )+ CO _2(g)+ H _2 O ( l )$
What mass of $CaCO _3$ is required to react completely with 25 mL of 0.75 M HCl ?
→What mass of $CaCO _3$ is required to react completely with 25 mL of 0.75 M HCl ?
Write redox couples involved in the reactions (i) to (iv) given in question 34.
Use the following thermodynamic data to calculate the enthalpy change for the formation of solid lithium fluoride, LiF(s) from Li(s) and F2(g):
→$\text{Li(s)}+\frac{1}{2}\text{F}_2(\text{g})\overrightarrow{\ \ \ \ \ \ \ }\ \text{LiF(s)}$
$\text{Li(s)}\overrightarrow{\ \ \ \ \ \ \ \ }\ \text{Li(g)};$ $\Delta_\text{s}\text{H}^\circ=155\text{kJ mol}^{-1}$
$\frac{1}{2}\text{F}_2(\text{g})\overrightarrow{\ \ \ \ \ \ \ }\ \text{F(g)};$ $\Delta\text{H}^\circ=75\text{kJ}$
$\text{Li(g)}\overrightarrow{\ \ \ \ \ } \ \text{Li}^{+}(\text{g})+\text{e}^-;$ $\Delta\text{H}^\circ=520\text{kJ mol}^{-1}$
$\text{F(g)}+\text{e}^-\overrightarrow{\ \ \ \ \ \ } \ \text{F}^-(\text{g});$ $\Delta\text{H}^\circ=-333\text{kJ mol}^{-1}$
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A sample of drinking water was found to be severely contaminated with chloroform, CHCl3, supposed to be carcinogenic in nature. The level of contamination was 15ppm (by mass).
Express this in percent by mass.
Express this in percent by mass.
An element of atomic weight Z consists of two isotopes of mass number Z - 1 and Z + 2. Calculate the % of higher isotope.
- Indicate the number of $\sigma$ and $\pi$ bonds in HCONHCH3.
- Out of benzene, m-dinitrobenzeme and toluene which will undergo nitration most easily and why?
(a) If there is only one electron in the 3 p subshell, then in which of the $3 p _x, 3 p _y$ and $3 p _z$ orbitals will this electron be present?
(b) What are the quantum numbers representing the following :
(i) Size of orbitals
(ii) Shape of orbitals
(iii) Orientation of orbitals
(c) If the mass number of an element is double its atomic number and it has four electrons in its 2 p subshell, then write the name and electronic of this element.
→(b) What are the quantum numbers representing the following :
(i) Size of orbitals
(ii) Shape of orbitals
(iii) Orientation of orbitals
(c) If the mass number of an element is double its atomic number and it has four electrons in its 2 p subshell, then write the name and electronic of this element.
Write Lewis symbols for the following atoms and ions:
S and S2-.
S and S2-.
Complete the following reactions.
→- $\text{Iso-propyl bromide}\xrightarrow[\text{Heat}]{\text{Alc. KOH}}\text{A}\xrightarrow[\text{Peroxide}]{\text{HBr}}\text{B}$
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