Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Match List-I with List-II and select the correct answer using the code given below the Lists:
List-I (Hypothesis/Theory) List -II (Propounder)
A. Planetesimal Hypothesis 1. Kober
B. Thermal contraction theory 2. Chamberlin
C. Geosynclinals Orogen theory 3. Daly
D. Hypothesis of sliding continent 4. Jefferys
A-2, B-1, C-4, D-3
A-3, B-1, C-4, D-2
A-3, B-4, C-1, D-2
Bright light is found to emit from photographer's flashgun. This brightness is due to the presence of which one of the following noble gases?
Argon
Xenon
Neon
Helium
Which one of the following is not a characteristic of a compound?
Composition is variable.
All particles of compound are of only one type.
Particles of compound have two or more elements.
Both A & B
Which of the following substances cause temporary hardness in water?
1) Mg(HCO3)22) Ca(HCO3)23) CaCl24) MgSO4Select the correct answer using the code given below.
3 and 4
2 and 3
1 and 4
1 and 2
Which one of the following elements will be an isobar of calcium if the atomic number of calcium is 20 and its mass number is 40?
Element with 20 protons and 18 neutrons
Element with 18 protons and 19 neutrons
Element with 20 protons and 19 neutrons
Element with 18 protons and 22 neutrons
