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. RRB Junior Engineer / DMS / CMA
  6. ›
  7. 2019
  8. ›
  9. Q18

RRB Junior Engineer / DMS / CMA 2019 · Question 18 of 3719

What is the chemical name of quick lime?

Chemistry - Chemical Reactions

  1. Aa. Calcium carbonate
  2. Bb. Hydrogen sulphide
  3. Cc. Calcium oxideCorrect
  4. Dd. Sodium carbonate

Answer: C. c. Calcium oxide

Explanation

Calcium oxide is an ionic compound with the formula CaO. Also known as burnt lime it exists as white crystalline solid at room temperature. It is obtained by thermal decomposition of Calcium Carbonate (CaCO3). It is widely used in the manufacturing of cement, paper, and steel. it is also used in the water treatment plant as an acidity control agent.

Source: RRB JE 2019 CBT-1 (24-May-2019 Shift-2) — ixambee compilation with answer key and solutions · reliable-secondary

← Q17View full paper (3719 questions)Q19 →

Practice the full RRB Junior Engineer / DMS / CMA 2019 paper

Timed test with all 3719 questions, just like the real exam.

Start test