MCQ Class 11 Chemistry Chapter 3 Classification Of Elements And Periodicity In Properties Advertisement MCQ’s For All Chapters – Chemistry Class 11th 1. Lothar Meyer arranged the elements in order of increasing: Atomic weightDensityAtomic volumeAtomic radiiYour comments:Question 1 of 202. Law of Octaves was proposed by: JW Dobereiner D.I MendeleevJohn Alexander NewlandsLothar MeyerYour comments:Question 2 of 203. Law of Triads is applicable to which set of elements? Sodium, Potassium, RubidiumFluorine, Iodine, BromineChlorine, Bromine, IodineLithium, Beryllium, BoronYour comments:Question 3 of 204. In Mendeleev's periodic table, the groups were divided into how many subgroups?4123Your comments:Question 4 of 205. Modern periodic table is divided into:18 periods and 7 groups8 periods and 18 groups18 periods and 8 groups7 periods and 18 groupsYour comments:Question 5 of 206. Moseley performed experiments and studied the frequencies of which radiations emitted from the elements? Gamma raysX-raysUV raysInfra red raysYour comments:Question 6 of 207. Among the following statements the one that is not true about Mendeleev's Periodic Table is:Elements of group 7 and 8 were arranged on the basis of equivalent weightsSome elements in the same group differ in their propertiesElements were arranged on the basis of atomic weightsThe position of hydrogen was not justifiedYour comments:Question 7 of 208. Which scientist proposed that atomic number is more fundamental property of an element than its atomic mass? NewlandsLothar MeyerMoseleyMeyerYour comments:Question 8 of 209. Johann Dobereiner classified elements in group of three elements called asTrinityTrialsTriadsDiadsYour comments:Question 9 of 2010. In the modern periodic table, which period contains 32 elements? SixthFirstSeventhSecondYour comments:Question 10 of 2011. Horizontal rows in the periodic table are called: CellTableGroupsPeriodsYour comments:Question 11 of 2012. The second and third period of the modern periodic table contains how many elements?832182Your comments:Question 12 of 2013. Newland arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to:Third elementFourth elementSecond elementFirst elementYour comments:Question 13 of 2014. According to Dobereiner's law of triads the number of elements present in each group is:2453Your comments:Question 14 of 2015. Lothar Meyer proposed that on arranging the elements in order of increasing atomic weights; similarities appear in which type of properties?Only physical propertiesOnly chemical propertiesIn both physical and chemical propertiesthermodynamic propertiesYour comments:Question 15 of 2016. Eka silicon predicted by Mendeleev is which element: GermaniumAluminiumGalliumSodiumYour comments:Question 16 of 2017. Eka aluminium predicted by Mendeleev is which element? GermaniumMagnesiumGalliumSodiumYour comments:Question 17 of 2018. The basis of long form of periodic table is: Mass numberAtomic weightAtomic numberIonic radiusYour comments:Question 18 of 2019. Mendeleev predicted the existence of which element/elements in the periodic table? GalliumSodium and germaniumGallium and germaniumGermanium and GoldYour comments:Question 19 of 2020. At present how many elements are known?11011463105Your comments:Question 20 of 20 Loading...
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