ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Bleaching powder is agent: Dehydrating Oxidazing reducing all
2 Bleaching powder is prepared by the reaction of Cl2 with. Lime stone Lime water slaked lime Lime
3 Perchloric acid can be stored in solution form 47% 57% 67% 77%
4 The strongest acid is HF HCl HBr HI
5 The compound with cyclic hexamer is HF HCl HBr HI
6 The strongest hydrogen bond is in HF HCl HBr Hl
7 Which is volatile liquid? HF HCl HBr Hl
8 A property which differs fluorine from the other halogens? Direct combination with inert gases Uninegative Diatomic ns<sup>2</sup> , np<sup>5</sup>
9 Half life of most stable isotope of astatine is 8.0 hrs 8.1 hrs 8.2 hrs 8.3 hrs
10 Colour of Iodine is Pale yellow Greenish yellow Red brown Greyish black
11 Colour of bromine is Pale yellow Greenish yellow Red brown Greyish black
12 Colour of chlorine is Pale yellow Greenish yellow Red brown Greyish black
13 Colour of fluorine gas is Pale yellow Greenish yellow Red brown greyish black
14 Molecule of halogens exist as Monatomic Diatomic Triatomi Polyatomic
15 Radioactive element in halogens is Astatine bromine Iodine Fluorine
16 Halogens are called. salt former Light bearing copper forming None of these
17 Nobel gases are placed group: Group IV-A Group V-A Group VI-A Group VII-A
18 Gaseous HF exists in the form of Monomers Cyclic hexames As single entity Both (a) and (b)
19 Oxidation state of fluorine is: +1 +2 -1 -2
20 Smell of halogens is: Fruity Sweet Irritating Rotten egg
21 The most reactive elements are: Group IV-A Group V-A Group VI-A Group VII -A
22 Astatine belongs to group: I-A II-A III-A VII-A
23 An element that has a high ionization energy and tends to be chemically inactive would most likely to be: an alkali metal a transition element a noble gas a halogen
24 Hydrogen bond is the strongest between the molecules of: HF HCl HBr Hl
25 Chlorin heptoxide reacts with water to form: Hypochlorous acid Chloric acid Perchloric acid Chlorine and oxygen
26 Which of the following hydrogen halide is the weakest acid in solution? HF HBr Hl HCl
27 Allotropic forms of sulpher are Two Three Four Five
28 Allotropic forms of oxygen Te, Se are Two Three Four Five
29 All elements of group VI-A non-metal except Te S Se Po
30 Group VI-A elements are called: Halogens Electron deficient alkaline earth metal Chalcogens
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