Q1. Which acid and its salts are widely used as food preservatives to prevent the growth of mould, yeast and fungi?
- (a) Boric Acid
- (b) Perchloric acid
- (c) Sorbic acid
- (d) Malic acid
Answer & solution
Answer: (c) Sorbic acid
All 40 GK / GS questions asked in RRB NTPC UG CBT-1 2024-25 on 28 August 2025 Shift 1, with correct answers and short solutions, subject-wise: Chemistry, Polity, Biology, Static GK, Geography, Modern History.
Answer: (c) Sorbic acid
Answer: (a) Sulphur dioxide and nitrogen oxides
Answer: (c) Nagaland
Answer: (d) Article 2 (Parliament may by law admit new states)
Answer: (c) Article 9
Answer: (c) Anglo-Indian Reservation
Answer: (a) Both, Supreme Court and High Courts can strike down unconstitutional laws.
Answer: (a) To provide basic rules for coordination and assurance
Answer: (d) Nikshay Mitras
Answer: (b) Chloroplast
Answer: (b) Growth and repair of tissues
Answer: (a) National Games
Answer: (a) Ministry of Electronics and Information Technology (MeitY)
Answer: (c) Tamasha
Answer: (a) Tamil Nadu
Answer: (c) The flat land and perennial rivers support canal networks.
Answer: (d) East Coast of India
Answer: (d) South America
Answer: (c) Bal Gangadhar Tilak
Answer: (d) 1820
Answer: (d) Gopal Krishna Gokhale
Answer: (a) Indigo
Answer: (d) Chandigarh
Answer: (a) Courts must report cash transactions over ₹2 lakh to the Income Tax Department.
Answer: (b) Animesh Kujur
Answer: (c) Visakhapatnam
Answer: (c) Right to Life under Article 21
Answer: (b) Heart Lamp
Answer: (d) C-DOT & Sterlite Technologies Ltd.
Answer: (a) Nishchay
Answer: (d) Li Chenggang
Answer: (a) Indian Air Force
Answer: (d) Advanced optical communication
Answer: (b) Primary products
Answer: (a) Infant mortality rate
Answer: (c) Warehousing
Answer: (d) Pallichchhandam
Answer: (d) Faizabad
Answer: (b) Windows + I
Answer: (d) It opens the application or file.