Question
What is photoelectric effect? Explain with diagram.
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Answer
SELF
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The solubility of silver chloride (AgCl) in water at 25°C is 1.06 × 10-5mol L-1. Calculate the solubility product of AgCl at this temperature.
- Use the following reactions to arrange the elements A, B, C and D in order of their redox reactivity:
- A + B+ → At + B
- B + D+ → B+ +D
- C+ + D → No reaction
- B+C+ → B+ + C
- On the basis of above redox activity series, predict which of the following reactions would you expect to occur?
- A+ + C → A+ C+
- A+ + D → A+ D+
Explain different types of isomerism in alkenes with example.
Match the ions given in Column I with their nature given in Column II.
→| | Column I | | Column II |
| (i) |  | (a) | Stable due to resonance. |
| (ii) | $\text{F}_3-\text{C}^\oplus$ | (b) | Destabilised due to inductive effect. |
| (iii) | $\ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ |\\\text{CH}_3-\text{C}^\ominus\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$ | (c) | Stabilised by hyperconjugation. |
| (iv) | $\ \ \ \ \ \ \ \ \ \ \ \ \ _\oplus\\\text{CH}_3-\text{CH}-\text{CH}_3$ | (d) | A secondary carbocation. |
If the photon of the wavelength 150pm strikes an atom and one of tis inner bound electrons is ejected out with a velocity of 1.5 × 107ms –1, calculate the energy with which it is bound to the nucleus.
The buffers of X and Y of pH 4.0 and 6.0 respectively are prepared from acid HA and the salt Na A.
Both the buffers are 0.50M in HA. What would be the pH of the solution obtained by mixing equal volumes of the two buffers?
(KHA = 1.0 × 10-5)
Both the buffers are 0.50M in HA. What would be the pH of the solution obtained by mixing equal volumes of the two buffers?
(KHA = 1.0 × 10-5)
Balance the following ionic equations.
$\text{Cr}_2\text{O}^{2-}_7+\text{Fe}^{2+}+\text{H}^+\xrightarrow{ \ \ \ \ \ \ \ \ }\text{Cr}^{3+}+\text{Fe}^{3+}+\text{H}_2\text{O}$
→$\text{Cr}_2\text{O}^{2-}_7+\text{Fe}^{2+}+\text{H}^+\xrightarrow{ \ \ \ \ \ \ \ \ }\text{Cr}^{3+}+\text{Fe}^{3+}+\text{H}_2\text{O}$
The energy of $\sigma\ 2\text{p}_{\text{z}}$ molecular orbital is greater than 2px and 2py molecular orbitals in nitrogen molecule. Write the complete sequence of energy levels in the increasing order of energy in the molecule. Compare the relative stability and the magnetic behaviour of the following species:
N2, N+2, N–2, N2+2
→N2, N+2, N–2, N2+2
| S. No | Column I | Column II |
| 1. | [Mn(CO)5]- | +6 |
| 2. | [Mn2(CO)10] | +2 |
| 3. | K4[Mn(CN)6] | 0 |
| 4. | K2MnO4 | -1 |
One of the reaction that takes place in producing steel from iron ore is the
reduction of iron(II) oxide by carbon monoxide to give iron metal and CO2.
$\text{FeO (S) + CO (g)}\rightleftharpoons\text{Fe (S) + CO}_2\text{ (g)};\text{ K}_{\text{p}}=0.265\text{atm at}1050\text{K}$
What are the equilibrium partial pressures of CO and CO2 at 1050 K if the initial partial pressures are: pCO= 1.4atm and = 0.80atm?
→reduction of iron(II) oxide by carbon monoxide to give iron metal and CO2.
$\text{FeO (S) + CO (g)}\rightleftharpoons\text{Fe (S) + CO}_2\text{ (g)};\text{ K}_{\text{p}}=0.265\text{atm at}1050\text{K}$
What are the equilibrium partial pressures of CO and CO2 at 1050 K if the initial partial pressures are: pCO= 1.4atm and = 0.80atm?