ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Which is used as cooling medium in nuclear reactors? He Ne Ar Kr
2 Which noble gas is used in mixture used for breathing by divers? Cl<sub>2</sub> NH<sub>3</sub> CO<sub>2</sub> He
3 Which has complete valence shell? C N O Ne
4 Which compound of noble gas xenon can be prepared? Oxides Fluoride Oxyfluorides All of these
5 Noble gases are placed in group Group IV-A Group V-A Group VI-A Group VII-A
6 I2O5is used for quantitative study of CO<sub>2</sub> NO<sub>2</sub> NO CO
7 Angle is OF2is 120<sup>0</sup> 180<sup>0</sup> 105<sup>0</sup> 102<sup>0</sup>
8 Gaseous HF exists in the form of Monomers Cyclic hexamers As single entity Both a and b
9 Which has the least oxidizing power? F<sub>2</sub> Cl<sub>2</sub> Br<sub>2</sub> I<sub>2</sub>
10 Oxidation state of fluorine is +1 +2 -1 -2
11 Which halogen has maximum Van-der Waal's forces? F<sub>2</sub> Cl<sub>2</sub> Br<sub>2</sub> I<sub>2</sub>
12 Smell of halogen is Fruity Sweet Irritating Rotten egg
13 Which halogen has Iustrous shining? F<sub>2</sub> Cl<sub>2</sub> Br<sub>2</sub> I<sub>2</sub>
14 The only non-metal in liquid form is S Cl Br P
15 Half life period of astatine is 8.1 hrs 8.2 Hrs 8.3 hrs 8.4 hrs
16 The most reactive elements are Group IV-A Group V-A Group VI-A Group VII-A
17 Astatine belongs to group I-A II-A III-A VII-A
18 Which of the following represents the correct electronic configuration of the outermost energy level of an element of zero (VIIA) group in the ground state? s<sup>2</sup>p<sup>2</sup> s<sup>2</sup>p<sup>4</sup> s<sup>2</sup>p<sup>5</sup> s<sup>2</sup>p<sup>6</sup>
19 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
20 Which halogen occurs naturally in a positive oxidation state? Fluorine Chlorine Bromine Iodine
21 Which is the strongest acid? HClO HClO<sub>2</sub> HClO<sub>3</sub> HClO<sub>4</sub>
22 Bleaching powder may be produced by passing chlorine over Calcium carbonate Hydrated calcium sulphate Anhydrous calcium sulphate Calcium hydroxide
23 the anhydride of HCIO4is CIO<sub>3</sub> ClO<sub>2</sub> Cl<sub>2</sub>O<sub>5</sub> Cl<sub>2</sub>O<sub>7</sub>
24 Which halogen will react spontaneously with Au(s)to produce Au3++ Br2 F2 I2 Cl2
25 Hydrogen bond is the strongest between the molecules of HF HCl HBr HI
26 Chlorine heptoxide (Cl2O7) reacts with water to form Hypochlorous acid chloric acid Perchloric acid Chlorine and Oxygen
27 Which of the following hydrogen halide is the weakest acid in solution HF HBr HI HCl
28 d-block elements belong to groups I-A &amp; II-A III-A to VIII-A I-B to X-B Lanthanides
29 Transition elements belong to I-A &amp; II-A III-A to VIII-A I-B to X-B Lanthanides
30 p-block elements belong to group I-A &amp; II-A III-A to VIII-A I-B to X-B Lanthanides
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