Consider the following statements: Statement-I: India, despite having uranium deposits, depends on coal for most of its electricity production. Statement-II: Uranium, enriched to the extent of at least 60%, is required for the production of electricity. Which one of the following is correct in respect of the above statements?
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- ABoth Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I
- BBoth Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I
- CStatement-I is correct but statement-II is incorrect
- DStatement-I is incorrect but Statement-II is correct
Show answer
Answer: (C) Statement-I is correct but statement-II is incorrect
Statement-I is correct:
India has uranium deposits but still relies heavily on coal (about 75% of power generation is coal-based).
Statement-II is wrong:
It incorrectly states that all nuclear reactors need enriched uranium above 36%.
Most nuclear reactors use Low Enriched Uranium (LEU) at only 3-5% enrichment.
Uranium enriched above 20% is called Highly Enriched Uranium (HEU).
So Statement-I is correct but Statement-II is not.
Answer is (c).
Coal provides about 75% of India's electricity despite having domestic uranium deposits, making energy transition a critical policy challenge.
Most nuclear reactors worldwide use Low Enriched Uranium (LEU) at only 3-5% enrichment, not the 60% mentioned in the question which would be weapons-grade material.
UPSC is testing whether students can distinguish between civilian nuclear power requirements versus weapons-grade uranium enrichment levels.
Uranium Enrichment Levels
Science And Technology uranium enriched 60%
Uranium Enrichment: LEU vs HEU & Nuclear Power Requirements
Commercial nuclear reactors use Low Enriched Uranium (LEU) at only 3-5% enrichment
Highly Enriched Uranium (HEU) is uranium enriched above 20%
60% enrichment mentioned in Statement-II is weapons-grade level, not power generation
Natural uranium contains only 0.7% U-235, rest is U-238
What is Enrichment?
Uranium enrichment increases the concentration of U-235 isotope, which is fissile (can sustain nuclear chain reactions). Natural uranium has only 0.7% U-235, but nuclear reactors need higher concentrations to maintain controlled fission.
Uranium Enrichment Categories
Category | Enrichment Level | Primary Use | Key Point |
|---|---|---|---|
Natural Uranium | 0.7% U-235 | Heavy water reactors (CANDU) | India's PHWR reactors use this |
Low Enriched Uranium (LEU) | 3-5% U-235 | Most commercial power reactors | Light Water Reactors (LWR) |
Highly Enriched Uranium (HEU) | Above 20% U-235 | Research reactors, naval propulsion | Weapons-grade starts at 90%+ |
Weapons-grade | 90%+ U-235 | Nuclear weapons | Statement-II's 60% falls here |
India's Nuclear Reactor Types
Pressurized Heavy Water Reactors (PHWR) - India's indigenous design uses natural uranium (no enrichment needed)
Light Water Reactors (LWR) - Imported technology requires LEU at 3-5% enrichment
India has 22 PHWRs and 2 LWRs (Kudankulam units from Russia)
Three-stage nuclear program - designed to use natural uranium initially, then thorium
Trap in Statement-II: Confuses weapons-grade enrichment (60%) with power reactor requirements (3-5%)
Common confusion: All nuclear reactors need highly enriched uranium - FALSE, India's PHWRs use natural uranium
Number trap: 20% is the HEU threshold, not 60% for civilian reactors
Technology mix-up: Heavy water reactors vs Light water reactors have different fuel requirements
India's Electricity Generation Mix
Indian Economy coal electricity production uranium deposits
India's Power Generation: Coal Dominance Despite Energy Alternatives
Coal-based thermal power accounts for approximately 75% of India's electricity generation
India has uranium deposits in Jharkhand, Andhra Pradesh, and Rajasthan but limited nuclear capacity
Nuclear power contributes only 3% to India's electricity mix despite uranium availability
Renewable energy (solar, wind, hydro) growing but still secondary to coal
India's Power Generation Sources
Source | Share (%) | Installed Capacity | Key Feature |
|---|---|---|---|
Coal (Thermal) | ~75% | ~210 GW | Abundant domestic reserves |
Renewable Energy | ~12% | ~120 GW | Fastest growing sector |
Hydro Power | ~5% | ~47 GW | Seasonal variation issues |
Nuclear Power | ~3% | ~7 GW | 22 reactors operational |
Natural Gas | ~2% | ~25 GW | Import dependent |
Diesel/Others | ~3% | ~15 GW | Backup and peak load |
Why Coal Dominance Persists
Abundant reserves - India has world's 4th largest coal reserves (~106 billion tonnes)
Cost advantage - Coal power remains cheapest baseload option at ₹2-3 per unit
Infrastructure legacy - Existing coal plants, mining, and transport networks
Energy security - Domestic coal reduces import dependency unlike oil/gas
Nuclear constraints - Limited uranium reserves, high capital costs, long gestation periods
India's Uranium Resources
# India's Uranium Deposits
## Major States
- **Jharkhand** (Jaduguda mines)
- **Andhra Pradesh** (Tummalapalle)
- **Rajasthan** (scattered deposits)
- **Chhattisgarh** (Bastar region)
## Challenges
- **Limited high-grade ore**
- **Environmental concerns**
- **Land acquisition issues**
- **Processing capacity constraints**
## Strategic Aspects
- **Three-stage program**
- **Import agreements** (Russia, Kazakhstan)
- **Thorium reserves** (world's largest)
- **Indigenous reactor technology**Statement-I Validation
Statement-I correctly captures the energy paradox - despite having uranium deposits at Jaduguda (Jharkhand) and Tummalapalle (Andhra Pradesh), India generates 75% electricity from coal. This reflects economic and infrastructural realities rather than resource unavailability.
Resource vs utilization confusion: Having uranium deposits ≠ major nuclear power generation
Percentage precision: Coal share is ~75%, not exactly 75% - UPSC tests approximate ranges
Nuclear capacity mistake: India's nuclear share is 3%, much lower than global average of 10%
Renewable growth trap: Despite fast growth, renewables still secondary to coal in total generation
Statement-Based Questions Strategy
Indian Economy Statement-I Statement-II correct explanation
UPSC Statement-Based Questions: Analysis Framework & Common Traps
Two-step analysis: First verify each statement independently, then check explanation relationship
Option C pattern: Statement-I correct, Statement-II incorrect - very common in UPSC
Explanation trap: Even if both statements are correct, Statement-II may not explain Statement-I
Statement Analysis Process
%%{init: {"flowchart": {"wrappingWidth": 460}}}%%
flowchart TD
s1["`****Step 1: Verify Statement-I****
Check factual accuracy independently - ignore Statement-II`"]
s2["`****Step 2: Verify Statement-II****
Check factual accuracy independently - ignore Statement-I`"]
s3["`****Step 3: Check Explanation Link****
If both correct, does Statement-II logically explain Statement-I?`"]
s4["`****Step 4: Select Option****
A/B/C/D based on individual truth + explanation relationship`"]
s1 --> s2
s2 --> s3
s3 --> s4Option Selection Matrix
Statement-I | Statement-II | Explanation Link | Correct Option |
|---|---|---|---|
✓ Correct | ✓ Correct | ✓ Valid explanation | A |
✓ Correct | ✓ Correct | ✗ No explanation link | B |
✓ Correct | ✗ Incorrect | N/A | C (This question) |
✗ Incorrect | ✓ Correct | N/A | D |
This Question's Analysis
Statement-I: India depends on coal despite having uranium - CORRECT (75% coal-based power).
Statement-II: 60% enriched uranium required for electricity - INCORRECT (civilian reactors need only 3-5%).
Since Statement-I is correct but Statement-II is factually wrong, answer is Option C.
Hasty reading: Students often don't verify each statement independently before checking explanation
Explanation assumption: Assuming Statement-II explains Statement-I without checking logical connection
Option A bias: Many students default to Option A when both statements 'sound correct'
Technical detail traps: Statement-II uses specific numbers (60%) that sound authoritative but are wrong
Real-world logic trap: Using general knowledge instead of precise technical facts for verification