PYQPulse
HomeMocksPracticePYQsDashboard
PYQPulse

Timing-accurate mock tests and PYQs for SSC, Banking and Railway exams — so the real paper feels like a revision.

Exams

  • SSC exams
  • Banking exams
  • Railway exams
  • All exams

Practice

  • Practice questions
  • Mock test series
  • Sectional tests
  • Year-wise PYQs
  • Performance analytics

Company

  • About us
  • Help Centre
  • Pricing
  • Sign in

Legal

  • Privacy Policy
  • Terms of Service

Contact

  • hello@testwala.co.in
  • Telegram
  • +91 62816 87760

Practice interface modeled on the official exam pattern — not the official examination. PYQPulse is not affiliated with the Staff Selection Commission, IBPS, SBI, RBI, NABARD, SEBI or Indian Railways.

© 2026 PYQPulse. All rights reserved.

Built for aspirants, by aspirants.

HomeMocksPracticeStats
  1. Home
  2. ›
  3. PYQs
  4. ›
  5. TNPSC Group-I
  6. ›
  7. 2021
  8. ›
  9. Q50

TNPSC Group-I 2021 · Question 50 of 148

In Haber's process for the manufacture of ammonia ________.

Chemistry - Industrial

  1. AFinely divided iron is used as a catalystCorrect
  2. BFinely divided molybdenum is used as a catalyst
  3. CFinely divided nickel is used as a catalyst
  4. DNo catalyst is required

Answer: A. Finely divided iron is used as a catalyst

Explanation

Haber's process (N2 + 3H2 -> 2NH3) uses finely divided iron as catalyst with molybdenum as promoter.

Source: TNPSC Group-I Prelims (held 3 Jan 2021) - official paper via examrace.com

← Q49View full paper (148 questions)Q51 →

Practice the full TNPSC Group-I 2021 paper

Timed test with all 148 questions, just like the real exam.

Start test