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) !!!
- The Lewis acids are ……………….
5.None of theseAnswer – 4.Electron Deficients
Electron-deficient molecules (those with less than an octet of electrons) are Lewis acids
- The number of fundamental particles in an atom of the lightest isotope carbon are
5.None of theseAnswer – 3.18
The number of fundamental particles in an atom of the lightest isotope carbon are 18
- The Octet rule does not always hold for which of the following elements ?
5.None of theseAnswer – 2.P
The octet rule refers to the tendency of atoms to prefer to have eight electrons in the valence shell. When discussing the octet rule, we do not consider d or f electrons. Only the s and p electrons are involved in the octet rule.but the Octet rule does not always hold for P
- Shielding effect across the period is ……………………
4.Decreasing and Increasing
5.None of theseAnswer – 1.Constant
Shielding effect across the period is constant
- The number of isotopes of elements with even mass number and even atomic number are
5.None of theseAnswer – 1.154
The number of isotopes of elements with even mass number and even atomic number are 154
- Unit rate of reaction is ………………….
1.Moles dm -1 sec -1
2.Moles dm -1 sec -2
3.Moles dm -3 sec -2
4.Moles dm -3 sec -1
5.None of theseAnswer – 4.Moles dm -3 sec -1
Unit rate of reaction is Moles dm -3 sec -1
- Geometric Isomerism found in ……………..
4.All of these
5.None of theseAnswer – 2.Alkenes
Cis/trans isomerism(geometric isomerism) is a term used in organic chemistry to refer to the stereoisomerism engendered in the relative orientation of functional groups within a molecule
- Litmus is obtained from …………………..
5.None of theseAnswer – 4.Lichens
Litmus is a water soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity.
- Rock salt is a mineral containing which of the following ?
5.None of theseAnswer – 3.Sodium chloride
Rock salt is a mineral form and is isometric crystals of Sodium Chloride. It may also contain other elements like magnesium, potassium, etc
- Which of the following is Dry ice ?
1.Solid carbon dioxide
2.Solid carbon monoxide
3.Liquid carbon dioxide
4.Liquid carbon monoxide
5.None of theseAnswer – 1.Solid carbon dioxide
Dry ice, sometimes referred to as “cardice” (chiefly by British chemists), is the solid form of carbon dioxide. It is used primarily as a cooling agent