MDCAT Chemistry Online Test With Answers

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MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Which one is a non-polar compound? SnCl2 PH3 Gecl4 H2O
2 The no. of Ip's on oxygen in CO are 1 3 4 2
3 A molecule that has polar bonds but is overall non - polar IF CCl4 PCI3 All
4 In a group, the atomic radii from top to bottom increase decrease don't change show variable trend
5 In a period the atomic radii increase decrease remain same first increase, then decreased
6 The ionization energy generally increases from left to right in a period increases from top to bottom in a group does not change in a period does not change in a group
7 Octet rule is not allowed in the formation of NF3 B.CF4 CCI4 PCI5
8 what is the exact value of angle in BF3 90 104.51 119.5 120°
9 pi-bond can be formed by sideways overlap of s-orbital d-orbital p-orbital sp orbital
10 Total number of valence electrons in phosphonium ion (PH4-) is 8 9 12 10
11 Elements of group IA and IIA are electronegative neutral electropositive non-metals
12 lonic bond is produced after complete transfer of nucleus neutrons electrons protons
13 Elements having high ionization potential values are metals non- metal liquids solid
14 Greater shielding effect corresponds to ionization potential value greater lesser remain same no effect
15 Energy required to remove electron from an atom Ionization potential Electronegativity Electropositivity <div>Electron affinity</div>
16 Covalent bonds are directional Bidirectional Multidirectional Non directional
17 Bonding in MgO is an example of lonic bond Polar bond Covalent bond Coordination covalent bond
18 A covalent bond may be 100% covalent Partial ionic 100% ionic Both a and b
19 Polarity of a molecule is expressed in terms of Bond strength Dipole moment Bond length Shape
20 Carbon-Carbon double bond length in C3H6 154 pm 134 pm 120 pm 105 pm
21 Geometry of simple molecule with sp2 hybridization Triangular planar Trigonal Square planner Pyramidal
22 Which one of the followings has polar covalent bonds hut is overall nom-polar molecule: HF CO<sub>2</sub> CH<sub>4</sub> N<sub>2</sub>
23 Mostly ionic compounds are produced between elements of group IA and IIA IB and VIB IA. IIA and VII-A IA and IB
24 Bond will be covalent when electronegativity difference of bonded atom is Equal to 1.7 between 0.5 to l.7 Greater to 1.7 zero
25 Energy of atom in compound is Higher than individual atom Lower than individual atom equal to individual atom Impossible to predict
26 Which of the following best describes the shape and polarity of the carbon disulphide molecule? Bent and polar Linear and non-polar Pyramidal and polar Bent and non-polar
27 Total number of valence electrons in CH4 8 9 10 12
28 In which molecule. all atoms are coplanar? CH4 BF3 NH3 PH3
29 Which molecule is least ionic" NaCI HCL HF CsF
30 Geometry of NH3 is <sup>Tetrahedral</sup> Square planer Pyramidal Linear
31 Most reactive among the following Li Mg Ca Na
32 Which of the following bonds is not present in NH4CL lonic bond Covalent bond Co-ordinate covalent bond De-localized covalent bond
33 Which of the following molecules has angel of 120° BeCl2 BF3 CH4 NH3
34 The electrolyte used in fuel cell is КOH NaCl(aq) NaNO3 Molten NaCl
35 During space flights, astronauts ohlained water from Nickel cadmium cells Lead accumulator Fuel Cell Alkaline battery
36 Rusting of iron metal Fe occurs when Fe gets converted into Fe2O3 What happen with Fe? F'e is neutralized Fe is sublimed Fe is reduced Fe is oxidized
37 Which one of the following elements is the strongest reducing agent? Chlorine Sodium Magnesium Aluminium
38 Which of the following metal does not liberate hydrogen on reaction with acid? Mg Pt Zn Ca
39 Stronger is the oxidizing agent, stronger is the emf of cell Oxidation potential Reduction potential Reduction potential
40 During oxidation process, oxidation number of an element Decreases Increases Remains constant Both a and b
41 Coinage metals Cu, Ag and Au are the least reactive because they have Negative reduction potential Negative oxidation potential Positive reduction potential Positive oxidation potential
42 The standard electrode potential of hydrogen is arbitrarily taken at 298k is 1.00volt 0.10 volt 0.00 volt 10.0 volt
43 In an electrochemical series, elements are arranged on the basis of pH scale pKa scale pOH scale Hydrogen scale
44 In voltaic cell a saht bridge is used in order to Pass the electric current Prevent the flow of ions Mix solutions of two half cells Allow movement of' ions between two cells
45 The value of oxidation number of chlorine in HCIOs is +7 +5 -1 +3
46 The oxidation state of carbon in C2O-²4 is +4 -4 +3 +2
47 The common oxidation number of halogens is -1 +1 -2 0
48 In SO-²4 the oxidation number of sulphur is -8 -6 +8 +6
49 In MgCl2, the oxidation state ofCI is Zero -2 +2 -1
50
In all oxidation reactions, atoms of an element in a chemical species lose electrons and increases their

 Oxidation states Reduction states Electrode Negative charges
51 The reaction which is responsible for the production of electricity in the voltaic cell is Hydrolysis Oxidation Reduction Redox
52 The element with highest E°red N F O CI
53 If a salt bridge is removed from two half cells the emf is Increased Decreased Dropped to zero Electrodes will be reversed
54 SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode Zn has less reduction potential than hydrogen and Cu <div>Zn has high reductionl potential than hydrogen</div><div>and Cu</div> <div>Zn is below electrochemical series than hydrogen and Cu</div><div><br></div> Zn has least tendency to lose electron
55 The electrochemical series is based on pH scale Redox scale Hdrogen scale Arrhenius scale
56 The potential of SHE is taken as zero which is avalue Reference Arbitrary Exact Experimental
57 The working condition/s for SHE 1atm pressure 1M H-solution 298K temperature All of these
58 The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute Oxidation reduction Redox reaction electrolysis
59 During the electrolysis of Fused NaCI, the products are Na and H2 Na and Cl2 Na and O2 H2 and Cl2
60 The products of electrolysis of which of the followings are known Fused electrolyte Aqueous solution of eleetrolyte Solid electrolyte Solid metal
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