Question
What is photoelectric effect? Explain with diagram.
✓
Answer
SELF
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Write a relation between $\triangle G$ and Q and define the meaning of each term and answer the following:
a. Why a reaction proceeds forward when $Q < K$ and no net reaction occurs when $Q = K$.
b. Explain the effect of an increase in pressure in terms of reaction quotient Q for the reaction:
$
CO(g)+3 H_2(g) \rightleftharpoons CH_4(g)+H_2 O(g)
$
→a. Why a reaction proceeds forward when $Q < K$ and no net reaction occurs when $Q = K$.
b. Explain the effect of an increase in pressure in terms of reaction quotient Q for the reaction:
$
CO(g)+3 H_2(g) \rightleftharpoons CH_4(g)+H_2 O(g)
$
Calculate the enthalpy change on freezing of 1.0 mol of water at 10.0°C to ice at –10.0°C. $\Delta_{\text{fus}}\text{H}$ = 6.03kJ mol–1 at 0°C.
Cp[H2O(l)] = 75.3J mol–1 K–1
Cp[H2O(s)] = 36.8J mol–1 K–1
→Cp[H2O(l)] = 75.3J mol–1 K–1
Cp[H2O(s)] = 36.8J mol–1 K–1
Describe hybridisation in the case of PCl5 and SF6. The axial bonds are longer as compared to equatorial bonds in PCl5 whereas in SF6 both axial bonds and equatorial bonds have the same bond length. Explain.
What is meant by the term average bond enthalpy? Why there is difference in bond enthalpy of O–H bond in ethanol (C2H5OH) and water?
- How many electrons will present in sub-shell having spin quantum number value of $-\frac{1}{2}$ for n = 4?
- Which of the following transition will have minimum wavelength and why?
n4 → n1, n4 → n2, n2 → n1.
- Give the number of radial nodes for 3s and 2p orbitals.
The pH of milk, black coffee, tomato juice, lemon juice and egg white are 6.8, 5.0, 4.2, 2.2 and 7.8 respectively. Calculate corresponding hydrogen ion concentration in each.
Enthalpy diagram for a particular reaction is given in Fig. Is it possible to decide spontaneity of a reaction from given diagram. Explain.
Explain oxidizing and reducing agents with examples.
Explain the shapes of different atomic orbitals.
Explain different type of salt hydrolysis and various formulas of these from which amount of hydrolysis and pH of solution are determined.