MCQ Class 11 Chemistry Chapter 4 Chemical Bonding And Molecular Structure Advertisement MCQ’s For All Chapters – Chemistry Class 11th 1. During the formation of a chemical bond between two atoms:Only forces of repulsion are operativeForces of attraction and repulsion forces, both are operativeForces are not involvedOnly forces of attraction are operativeQuestion 1 of 202. Who discovered the octet rule? LangmuirDebyeBoyleKossel and LewisQuestion 2 of 203. The Lewis structure of H2S is: 1. H:S:H 2. H.S.H 3. 4. H:S.HABCDQuestion 3 of 204. A CO2 molecule contains: Two sigma and two pi bondsFour sigma bondsThree sigma and one pi bondFour pi bondsQuestion 4 of 205. Which one of them is an odd-electron molecule?BCl3SF6NOCO2Question 5 of 206. According to the Lewis symbols, the nucleus as well as the electrons in the inner shell of an element is represented by:The symbol of the elementThe number of dots on the symbolAtomic massAtomic numberQuestion 6 of 207. For the formation of covalent bond the difference in the value of electro negativities should be:Less than 2.7Equal to 2.7More than 1.7Equal to or less than 1.7Question 7 of 208. Select the molecule in which the central atom has incomplete octet. NF3BeH2H2OCO2Question 8 of 209. Among the following compounds octet rule is not obeyed by:PCl3SF6SO3SO2Question 9 of 2010. The correct Lewis dot structure for BeF2 molecule is: 1. F.Be.F 2. 3. F: Be: F4. F.Be: FABCDQuestion 10 of 2011. The number of dots in the Lewis symbol represents: The number of valence electrons present in the atomAtomic mass of the elementAtomic number of the elementThe electronic configuration of the atomQuestion 11 of 2012. According to Lewis symbol, the valency of N is:4326Question 12 of 2013. The formal charge on oxygen which is single bonded in ozone is: -1+1+2-2Question 13 of 2014. The formation of a chemical bond is accompanied by:Sometimes increase and sometimes decrease in energyDecrease in energyIncrease in energyNeither increase nor decrease in energyQuestion 14 of 2015. Identify an example of covalent solid:Sodium chlorideSilicon carbideCalcium chlorideMethaneQuestion 15 of 2016. Covalent compounds are soluble in: Polar solventsNon-polar solventsConcentrated acids All solventsQuestion 16 of 2017. A force which binds atoms of same or different elements by mutual sharing of electrons is called:Covalent bondCo-ordinate bondHydrogen bondIonic bondQuestion 17 of 2018. Which one of the following statement is not true for octet rule?It does not explain relative stability of molecules.It is useful for understanding structures of most of organic compounds.It is based upon the chemical inertness of noble gases.It accounts for the shape of molecules.Question 18 of 2019. Among the following molecules octet rule is not obeyed by: OF2CO2PCl3ClF3Question 19 of 2020. The number of electrons present in the valence shell of the central atom of super octet molecules is: SixMore than eightEightTwoQuestion 20 of 20 Loading...
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