Periodic Classification Mcqs
Our collections of Multiple choice questions and answers focuses on study of Periodic Classification in Chemistry. These questions are chosen from a collection of most authoritative and best reference books on Chemistry. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate Periodic Classification in Chemistry comprehensively.
33. The atoms of same element having same atomic number but different mass number are called
Isobars
Isomers
Isotopes
Isotropes
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34. Deuterium reacts with oxygen to form
Hard water
Heavy water
Soft water
Water gas
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35. Which order of ionization energy is correct
Mg
Si > P
Mg > A1
Both b & c
36. Ionization energy depends upon
Nuclear charge
Atomic size
Shielding effect
I.E depends upon all of the above and nature of orbital
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37. Shielding effect across the period
Increases
Decreases
Can not be predicted
Remains constant
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38. Addition of 2nd electron to a uninegative ion is always
Exothermic
Endothermic
Data is insufficient
Unpredictable
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39. Higher value of electron affinity means
Atom will lose electron easily
Atom will gain electron easily
Atom may form di-positive ion
The reason is unknown
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40. Metallic characters of alkali metals
Increase down the group
Decrease down the group
No regular trend
Remain same
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41. Melting points of VII-A group elements down the group
Increase
Decrease
Remain constant
No regular trend
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42. Oxidation state of an atom represents
Number of electrons gained
Number of electrons lost
Apparent charge in compound
Its vacancies
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43. Which of the following possesses maximum hydration energy?
Na+
K+
Mg+2
Ca+2
44. Halides in which halogen atoms act as a bridge between two atoms of the other element are called
Covalent halides
Electronegative halides
Polymeric halides
Polymeric hydrides
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45. Less electronegative elements such as Be Ga A? etc form
Polymeric halide
Covalent halide
Ionic halide
All
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46. Iodine is solid due to
Strong covalent bond
Large value of dipole moment
High polarizability
Strong hydrogen bonding
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