CTET Solved Paper - UTET April 2015 Paper2
131. Emission of which one of the following will produce isobars?
- Option : B
- Explanation : (B) Atoms of different elements having same mass numbers but different atomic numbers are called isobars. Isobar is formed due to beta emission of a radioactive element.
132. The radioactive isotope of hydrogen is called
- Option : D
- Explanation : (D) Hydrogen has three main isotopes, there are protium (1H) deuterium (2H) and tritium (3H). Protium and deuterium are stable while tritium is radioactive and has a half-life of about 12 years
133. Vapour pressure of liquid depends upon the
- Option : B
- Explanation : (B) Vapour pressure of a liquid depend only on temperature and nothing else.
134. Which one of the following phenomena cannot be attributed to the refraction of light?
135. During day time, plants absorb
- Option : B
- Explanation : (B) Plants absorb CO2 during daytime to form sugar by the process of photosynthesis.
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