Hello Aspirants. Welcome to Online General Knowledge section in Affairs cloud, which is important for all the competitive exams. We have created Some questions related to General Science(Chemistry) !!!
- ………………….. having strongest intermolecular forces of attraction
5.None of theseAnswer – 1.Iodine
These forces are strongest in large, polarizable molecules.Iodine (I2) is a nonpolar molecule, but it is large (MW: 253.8 g/mol) and has a very polarizable electron cloud.
- Which of the following is used for artificial fruit ripening of green fruit ?
5.None of theseAnswer – 2.Ethylene
Blackberries at various stages of ripeness: unripe (green), ripening (pink and red),when green and artificially ripened after shipment by being gassed with ethylene.
- The Radio active element ……………………. used in heart pacemaker
5.None of theseAnswer – 4.Uranium
Plutonium is formed in nuclear power reactors from uranium. Early heart pacemakers used Pu-238 as the power source.
- Galvanized iron is made by coating iron with ……………..
5.None of theseAnswer – 3.Zinc
Galvanizing is a process of coating iron or steel with zinc in order to provide greater
protection against corrosion for the iron or steel base.
- Water has maximum density at
5.None of theseAnswer – 1.4oC
Basically, at 4 degrees C the water molecules still have enough energy to move around, but the strength of the hydrogen bonds keeps the molecules close together.Hence Water has maximum density at 4oC
- ………………. has same isotopes like Palladium
5.None of theseAnswer – 3.Calcium
Calcium isotopes (mainly Ca-42, Ca-44, Ca-46 and Ca-48) are used extensively in clinical research and mainly in nutritional studies and it has same isotopes like Palladium
- Cinnabar is an ore of which of the following ?
5.None of theseAnswer – 4.Mercury
Cinnabar is a toxic mercury sulfide mineral with a chemical composition of HgS.
- ……………… is a minute amount of a radio isotope
5.None of theseAnswer – 2.Tracer
A trace radioisotope is a radioisotope that occurs naturally in trace amounts (i.e., extremely small).
- The Composition of tritium is ……………………
1.1 electron, 2 proton, 1 neutrons
2.2 electron, 1 proton, 1 neutrons
3.1 electron, 1 proton, 2 neutrons
4.2 electron, 2 proton, 2 neutrons
5.None of theseAnswer – 3.1 electron, 1 proton, 2 neutrons
Tritium atom contains one proton, two neutrons, and one electron
- ………….. is the Triple point of water
5.None of theseAnswer – 1.273K
The triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.
Triple point of water is 273K