Q1. A buffer solution has [CH₃COOH] = 0.1 M and [CH₃COO⁻] = 0.1 M. If pKa of CH₃COOH is 4.76, then what is its pH?
- (a) 4.76
- (b) 3.76
- (c) 5.76
- (d) 7.00
Answer & solution
Answer: (a) 4.76
All 37 GK / GS questions asked in RRB NTPC GL CBT-1 2024-25 on 14 June 2025 Shift 1, with correct answers and short solutions, subject-wise: Chemistry, Current Affairs, Geography, Economics, Modern History, Polity.
Answer: (a) 4.76
Answer: (d) Main group elements
Answer: (a) Gyanendra Pratap Singh
Answer: (d) Purpose
Answer: (b) May 2025
Answer: (a) Thakkolam, Tamil Nadu
Answer: (b) Madhav Gadgil
Answer: (a) Tapentadol and Carisoprodol
Answer: (c) Pankaj Advani
Answer: (d) Marie Howe
Answer: (b) Arunachal Pradesh
Answer: (d) Indo-Ganga-Brahmaputra Plain
Answer: (d) Jamshedpur
Answer: (c) Mega City
Answer: (c) Havelock Island
Answer: (c) Tarapore Committee
Answer: (c) 1948
Answer: (b) Service sector
Answer: (a) 3%
Answer: (c) Uttar Pradesh
Answer: (c) Indigo
Answer: (a) 1849
Answer: (c) Pitts' lndia Act, 1784
Answer: (b) Ho tribes
Answer: (c) Governor of the State
Answer: (c) 97ᵗʰ Amendment Act
Answer: (d) Article 351
Answer: (c) Village Panchayat, Block Samiti, Zilla Parishad
Answer: (c) Jharkhand
Answer: (a) Khayal
Answer: (d) Recycle Bin
Answer: (c) Graphics Processing Unit (GPU)
Answer: (b) Using 'File' → 'Close'
Answer: (c) To provide a consistent interface for applications to access different file systems
Answer: (b) Dhruvadevi
Answer: (a) DNA’s large polymeric nature and fragility
Answer: (c) Diwan-i-Kohi