To solve the question, we need to identify which of the given statements are incorrect. Let's analyze each statement step by step.
### Step 1: Analyze Statement (i)
**Statement (i)**: A typical solar cell can produce about 0.5 W electricity when exposed to the Sun.
- A typical solar cell, when exposed to sunlight, can produce around 0.7 W of electricity, not 0.5 W. Therefore, this statement is **incorrect**.
### Step 2: Analyze Statement (ii)
**Statement (ii)**: One atomic mass unit (u) is equivalent to about 931 MeV of energy.
- This statement is **correct**. One atomic mass unit is indeed approximately equal to 931 MeV according to the mass-energy equivalence principle.
### Step 3: Analyze Statement (iii)
**Statement (iii)**: The hydrogen bomb is based on thermonuclear fission reaction.
- The hydrogen bomb is based on thermonuclear **fusion**, not fission. Therefore, this statement is **incorrect**.
### Step 4: Analyze Statement (iv)
**Statement (iv)**: Solar cells are less expensive and highly efficient.
- While solar cells may be less expensive, they are not considered highly efficient. They typically have efficiencies ranging from 15-20%. Thus, this statement is **incorrect**.
### Step 5: Analyze Statement (v)
**Statement (v)**: India receives solar energy equivalent to 500 trillion kWh per year.
- According to government data, India receives solar energy equivalent to approximately 5000 trillion kWh per year, not 500 trillion kWh. Therefore, this statement is **incorrect**.
### Conclusion
The incorrect statements are:
- (i) A typical solar cell can produce about 0.5 W electricity when exposed to the Sun.
- (iii) The hydrogen bomb is based on thermonuclear fission reaction.
- (iv) Solar cells are less expensive and highly efficient.
- (v) India receives solar energy equivalent to 500 trillion kWh per year.
Thus, the answer to the question is that statements (i), (iii), (iv), and (v) are incorrect.
### Final Answer
The incorrect statements are: (i), (iii), (iv), and (v).
---
