ainfoera.com – MCQs, Mock Tests | Chemistry Chemistry MCQ Question -Periodic Classification

1 Inner transition elements are called

A Lanthanides B Actinides C Rare earth metals D All

✅ Correct Answer: 4

2 Seventh period contains ______________ normal elements

A 2 B 4 C 6 D 8

✅ Correct Answer: 1

3 Modern periodic table has been divided in _______ blocks

A 2 B 4 C 7 D 8

✅ Correct Answer: 2

4 Non-metals usually form ______________ oxides

A Acidic B Amphoteric C Neutral D Neutral

✅ Correct Answer: 1

5 Amphoteric exides are those which possess ________ properties

A Acidic B Basic C Acidic and basic D Neutral and acidic

✅ Correct Answer: 3

6 Best position of hydrogen in the periodic table is above I.A Group which is mainly due to

A Both are electropositive B Similar outer most shell electronic configuration C Both form ionic compounds D All

✅ Correct Answer: 4

7 Hydrogen resembles with carbon because of having

A Same number of electrons in the valence shell B Similar physical state C Remarkable reducing properties D Homovalent (show same valency)

✅ Correct Answer: 3

8 Which one of the following sets consists of all coinage metals?

A Cu Hg Au B Cu Ag Au C Ag Au Hg D Cu Fe Au

✅ Correct Answer: 2

9 In which of the following pairs are elements belonging to the same group?

A Boron & Beryllium B Nitrogen & Phosphorous C Magnesium & Aluminium D Gallium & Helium

✅ Correct Answer: 2

10 Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way?

A The nature of its oxides B The charge on its ions C The formula of its oxide D Its number of isotopes

✅ Correct Answer: 4

11 Which one of the following is not a periodic property?

A Melting point of elements B Boiling point of elements C Ionization energy of elements D Coordination number of ions

✅ Correct Answer: 4

12 The atomic radii decreases by increasing atomic number in

A Alkali metal B Alkaline earth metal C Elements from Li to Ne D Halogens

✅ Correct Answer: 3

13 Which discovery caused a revision in the periodic law as stated by Mendeleev?

A Location of nucleus by Rutherford B Atomic number by Moseley C X-rays by Roentgen D Natural radioactivity by Henry Bacquerel.

✅ Correct Answer: 2

14 An element has electronic conviguration 1s2 2s2 2p2. It belongs to

A Group II-A B Group IV-A C Group VII-A D Group VI-A

✅ Correct Answer: 2

15 The property which increases upto group IV-A then decreases onwards

A Ionization energy B Atomic radii C Melting & boiling points D Atomic volume

✅ Correct Answer: 3

16 Which of the following ion is stable in aqueous solution?

A H+ B H- C Cl- D All are stable

✅ Correct Answer: 3

17 The atoms of same element having same atomic number but different mass number are called

A Isobars B Isomers C Isotopes D Isotropes

✅ Correct Answer: 3

18 Deuterium reacts with oxygen to form

A Hard water B Heavy water C Soft water D Water gas

✅ Correct Answer: 2

19 Which order of ionization energy is correct

A Mg < A1 B Si > P C Mg > A1 D both b & c

✅ Correct Answer: 3

20 Ionization energy depends upon

A Nuclear charge B Atomic size C Shielding effect D I.E depends upon all of the above and nature of orbital

✅ Correct Answer: 4

21 Shielding effect across the period

A Increases B Decreases C Can not be predicted D Remains constant

✅ Correct Answer: 4

22 Addition of 2nd electron to a uninegative ion is always

A Exothermic B Endothermic C Data is insufficient D Unpredictable

✅ Correct Answer: 2

23 Higher value of electron affinity means

A Atom will lose electron easily B Atom will gain electron easily C Atom may form di-positive ion D The reason is unknown

✅ Correct Answer: 2

24 Metallic characters of alkali metals

A Increase down the group B Decrease down the group C No regular trend D

✅ Correct Answer: 1

25 Melting points of VII-A group elements down the group

A Increase B Decrease C Remain constant D No regular trend

✅ Correct Answer: 1

26 Oxidation state of an atom represents

A Number of electrons gained B Number of electrons lost C Apparent charge in compound D Its vacancies

✅ Correct Answer: 3

27 Which of the following possesses maximum hydration energy?

A Na+ B K+ C Mg+2 D Ca+2

✅ Correct Answer: 3

28 Halides in which halogen atoms act as a bridge between two atoms of the other element are called

A Covalent halides B Electronegative halides C Polymeric halides D Polymeric hydrides

✅ Correct Answer: 3

29 Less electronegative elements such as Be Ga A? etc form

A Polymeric halide B Covalent halide C Ionic halide D All

✅ Correct Answer: 1

30 Iodine is solid due to

A Strong covalent bond B Large value of dipole moment C High polarizability D Strong hydrogen bonding

✅ Correct Answer: 3

31 True increasing order of acidity of the oxides of Mn is

A MnO < MnO2 < Mn2O7 B Mn2O7 > MnO2 > MnO C MnO2 > MnO > Mn2O7 D MnO2 > Mn2O7 > MnO

✅ Correct Answer: 1

32 Keeping in view the size of atom which order is correct one?

A Mg > Sr B Ba > Mg C Lu > Ce D C1 > I

✅ Correct Answer: 2

33 Which one of the following element has highest exidation state in its compounds?

A Cr B Mn C Sn D O

✅ Correct Answer: 2

34 Which of the following cannot exist in solution

A O-2 B H+ C Cl- D Na+

✅ Correct Answer: 1

35 Which of the following is different with respect to physical appearance?

A Arsenic B Phosphorus C Antimony D Bismuth

✅ Correct Answer: 2

36 Which one of the followings possesses melting point below 0?C?

A Nitrogen B Phosphorus C Carbon D Bismuth

✅ Correct Answer: 1

37 Compounds of nitrogen and phosphorus are mostly

A ionic B covalent C polar D all varieties are possible

✅ Correct Answer: 2

38 The most electronegative element among the following is

A Sb B N C As D P

✅ Correct Answer: 2

39 SO3 is not absorbed in water directly because

A Reaction is exothermic B It is insoluble in water C Dilute acid is produced D All of above

✅ Correct Answer: 1

40 Phosphene gas will be produced if phosphorous acid is subjected to

A Oxidation B Reduction C Decomposition D Both b & c

✅ Correct Answer: 4

41 Which of the following will give phosphoric acid one reaction with water

A PCI5 B P2O3 C P2O5 D All of the above

✅ Correct Answer: 4

42 Which one of following is not a property of pure quartz?

A Coloured solid B Brittle C Hard D All of above

✅ Correct Answer: 1

43 Phosphorus is a Greek word and it means

A Light bearing B Fire C Impure D Tetrahedral

✅ Correct Answer: 1

44 Which of the following does not contain phosphorus?

A Yolk of egg B Bone C Nerves D Steel

✅ Correct Answer: 4

45 Allotropic form of phosphorus that is poisonous is

A White B Red C Black D Violet

✅ Correct Answer: 1

46 Which one of the following is not the use of graphite?

A Lead pencils B Abrasive C Lubricant D Electrode of electrolytic cell

✅ Correct Answer: 2

47 Acetic anhydride can be obtained by treating ethyl alcohol with

A P2O5 B H2SO4 C Both a and b D PCI5

✅ Correct Answer: 3

48 The composition of brown ring in nitrate test is

A FeSO4.No B FeSO4.No2 C FeSO4.No3 D FeSO4.N2o

✅ Correct Answer: 1

49 Phosphorous acid upon thermal decomposition yields phosphoric acid and

A Phosphine B Phosphorus C Water D Phosphorus pentoxide

✅ Correct Answer: 1

50 Which one of the following compounds usually smells like garlic?

A B P2O5 C H3PO3 D All have same smell

✅ Correct Answer: 1

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Chemistry MCQ Question -Periodic Classification