ECAT Chemistry Chapter 12 Periodic Classification of Elements and Periodicity Online Test With Answers

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ECAT Chemistry Chapter 12 Periodic Classification of Elements and Periodicity Online Test

Sr. # Questions Answers Choice
1 NaH is Ionic hydride Complex hydride Covalent hydride Interstitial hydride
2 Ionic hydrides are generally Liquid at room temperature Good electrical conductors Good reducing agents Easily reduced
3 Li, Be, B, C, O, Fl Ne are elements of Second period First period Third period Fourth period
4 The elements of sub-group A are called Transition elements Main elements Typical elements Rare earth elements
5 All the elements belongs to the 2nd period are Normal elements Transition elements Stable elements Halogens
6 According to Mendeleev, the properties of the elements are periodic function of their Atomic number Atomic volumes Atomic masses Atomic densities
7 Who gave the concept of atomic number Newton Mosley Dalton Newland
8 The classify the elements, Newland gave the idea of Octaves Triads Atomic volume Atomic mass
9 The statement that the properties of every eight elements are similar to the first is the law of Dobereiner Newland Mendeleev L. Meyer
10 From 39Y to 48Cd are called Transition elements Outer transition elements Inner transition elements 2nd transition series
11 Which of the following is not true for metalloids They are borderline elements that exhibit both metallic and non-metallic properties to some extent They usually act as electron donors with non-metals and as electron acceptors with metals Some of these elements are boron, silicon and germanium They are good conductors of heat and electricity
12 Indicate the correct statement All lanthanidees are present in the same group All halogens are present in the same period All the alkali metals are present in the same group All the noble gases are present int he same period
13 From left to right, atomic radii of transition elements Increases Decreases Remain same None of the above
14 The coinage metals are Ni, Pd, Pt Cu, Ag, Au Zn, Al, Pb Fe, Si, Sn
15 Which is the most volatile compound Hl HCl HBr HF
16 Mark the correct statement Na<sup>+ </sup>is smaller than Na atom Na<sup>+</sup>is larger than Na atom Cl<sup>-</sup>is the smaller than Cl atom Cl<sup>-</sup>(ion) and Cl (atom) are equal in size
17 Keeping in view the size of atoms, which order is the correct one Mg &gt; Sr Ba &gt; Mg Lu &gt; Ce Cl &gt; l
18 The valency, ionization energy and electrongativity of elements are related to its Atomic number Properties Atomic weight Family group
19 Which of the following has highest oxidation potential Be Li Na Ca
20 The valence shell of hydrogen is half filled like those of IV - A VIA V - A VIIA
21 Which of the following statement about electron affinity of two elements is correct Carbon has greater than oxygen Sulphur has less than oxygen Iodine has greater than bromine Bromine has less than chlorine
22 The structure of complex hydrides is Tetrahedal Trigonal Octahedral Square planar
23 For the representative elements from left to right across a period in the periodic table, the electron effinity of the atom generally Increases Remains constant Decreases Not clear
24 The elements of f-block are also known as Inner-transition Outer transition Normal elements Alkaline earth metals
25 Elements in the same family have Same atomic number Molecular wt same Same chemical properties Same electronic configuration
26 According to the periodic law, the chemical properties of the elements are periodic functions of their Density Atomic number Atomic mass Mass number
27 Which is not interstitial hydride LaH VH TaH None
28 In a group form top to bottom, the hardness of alkali metals Remains unchanged Increases Decreases None
29 Which has highest 1st I.E. Br Cl F l
30 Each vertical column of the periodic table includes elements with chemical characteristics that are in general Identical Similar Different Similar as well as different
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