IGET
IGET MCQ · Tests · Exam Prep
Quiz Start PYQ NEW

Railway RRB / NTPC

All Subjects 1,954 General Knowledge 439 Quantitative Aptitude 1,106 Reasoning Ability 202 General Science 207

Medical & Engg

NEET UG JEE Main Campus Placement

Govt Exams

UPSC Civil Services SSC CGL / CHSL Bank PO / Clerk Railway RRB/NTPC Defence NDA/CDS

Quick Links

Online Tests PYQ Bank All Subjects Current Affairs
Home › Tests › Railway RRB / NTPC

Railway RRB / NTPC

Railway RRB & NTPC MCQ questions — GK, Math, Reasoning, General Science.

1,954 Q 4 Subjects 10th / Graduate
Take Mock Test
Difficulty: All Easy Medium Hard 1931–1940 of 1,954
Advertisement
Q.1931 Easy General Science Environment
Gas causing global warming?
A Oxygen
B Nitrogen
C Carbon Dioxide
D Hydrogen
Correct Answer:  C. Carbon Dioxide
EXPLANATION

CO₂ is main greenhouse gas.

Take Test
Q.1932 Easy General Science Chemistry
Hardest natural substance?
A Gold
B Iron
C Diamond
D Quartz
Correct Answer:  C. Diamond
EXPLANATION

Diamond = 10 on Mohs scale.

Take Test
Q.1933 Easy General Science Disease & Health
Vitamin C deficiency causes?
A Rickets
B Scurvy
C Night blindness
D Beriberi
Correct Answer:  B. Scurvy
EXPLANATION

Scurvy from Vitamin C deficiency.

Take Test
Q.1934 Easy General Science Space & Astronomy
Planet closest to Sun?
A Venus
B Mercury
C Earth
D Mars
Correct Answer:  B. Mercury
EXPLANATION

Mercury is closest to Sun.

Take Test
Q.1935 Easy General Science Chemistry
Liquid to gas process?
A Condensation
B Precipitation
C Evaporation
D Sublimation
Correct Answer:  C. Evaporation
EXPLANATION

Evaporation = liquid to gas.

Take Test
Advertisement
Q.1936 Easy General Science Biology
DNA stands for?
A Deoxyribose Nucleic Acid
B Deoxyribonucleic Acid
C Double Nucleic Acid
D Deoxyribonicotinic Acid
Correct Answer:  B. Deoxyribonucleic Acid
EXPLANATION

DNA = Deoxyribonucleic Acid.

Take Test
Q.1937 Medium General Science Physics
Speed of sound in air?
A 300 m/s
B 343 m/s
C 400 m/s
D 250 m/s
Correct Answer:  B. 343 m/s
EXPLANATION

~343 m/s at 20°C.

Take Test
Q.1938 Easy General Science Physics
Unit of electric current?
A Volt
B Ohm
C Ampere
D Watt
Correct Answer:  C. Ampere
EXPLANATION

Current measured in Amperes.

Take Test
Q.1939 Easy General Science Disease & Health
Vitamin produced by sunlight?
A Vitamin A
B Vitamin B12
C Vitamin C
D Vitamin D
Correct Answer:  D. Vitamin D
EXPLANATION

Sunlight → Vitamin D synthesis.

Take Test
Q.1940 Easy General Science Chemistry
Atomic number of Carbon?
A 6
B 8
C 12
D 14
Correct Answer:  A. 6
EXPLANATION

Carbon atomic number = 6.

Take Test
IGET
iget AI
Online · Ask anything about exams
Hi! 👋 I'm your iget AI assistant.

Ask me anything about exam prep, MCQ solutions, study tips, or strategies! 🎯
UPSC strategy SSC CGL syllabus Improve aptitude NEET Biology tips