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Category: CHM101

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CHM101

1 / 50

Which of the isotopes of hydrogen is radioactive?_________

2 / 50

Increase in principal quantum number(n) means _________ of the atomic radii

3 / 50

Hydrogen can be obtained economically as a bi-product in the electrolysis of a compound called ________

4 / 50

Which of these alkali metals is the most electro-positive?______________

5 / 50

Atoms of an element which have the same atomic number but different mass number is known as _________

6 / 50

_______ is a compound formed when hydrogen combines covalently with non-metals.

7 / 50

Ortho and para-hydrogen exemplifies a type of isomerism referred to as __________ isomerism.

8 / 50

Which of these statements is not true of metallic elements?_________

9 / 50

The elements which the extra electron enters(n2)f orbitals are called ________

10 / 50

The f-blocks elements are otherwise known as ________

11 / 50

The alkali metals belong to the _______ elements

12 / 50

Which of these statements is not true of metallic hydrides? _______

13 / 50

The stability of alkali salts depend on ______

14 / 50

__________ is one of the isotopes of hydrogen whose neutron number is zero.

15 / 50

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{7}4s^{2}$ is the electronic configuration for an element with atomic number ___________

16 / 50

All these can be used as raw materials for the production of oxygen except ______

17 / 50

Berylium , an alkaline earth metal belongs to the _______ block elements.

18 / 50

Which of these alkalis has the most stable fluoride?______________

19 / 50

A consequence of _______ is the formation of a chelate ring.

20 / 50

Within the alkali metals, atomic size _________ down the group.

21 / 50

_________ is a radioactive isotope of hydrogen obtained on a large scale by irradiation of Li/Mg alloy of $ LiFe{3}$ with slow neutrons.

22 / 50

How many electrons are in potassium atom? __________

23 / 50

Which of the following is not true as we move down a group of s and p-block elements in the periodic table? ________

24 / 50

Ionization energy ________ down the group within the alkali metals

25 / 50

Which of these elements behave partly as the alkaline metals as well as a halogen element? _________

26 / 50

The most abundant metal in sea water is called ______.

27 / 50

Fuel cell have advantage over power plants in that its efficiency is _________

28 / 50

The presence of hydrogen bond in most molecules is responsible for the following EXCEPT ________

29 / 50

Inner transition elements are otherwise known as ________

30 / 50

Magnesium hydride is an example of ________ hydride.

31 / 50

Which of these is not a covalent hydride? ______

32 / 50

Halogens have ________ electron affinity

33 / 50

Which of these periods of the periodic table has only eight elements? ________

34 / 50

_____states that as far as possible in a given atom in the ground state, electrons in the same sub shell will occupy different orbitals and will
have parallel spins.

35 / 50

The percentage of deuterium in natural occurring hydrogen is ________

36 / 50

Elements which achieve a stable noble gas configuration by accepting just one electron are collectively called _______

37 / 50

How many elements are there in period 6 of the periodic table ? __________

38 / 50

The name given to group 2 elements in the periodic table is ________

39 / 50

Stability of alkali salts depends on which of the following?_______________

40 / 50

Hydrides of alkali metals react with water to liberate which of these?______________

41 / 50

An element that shows some properties similar to alkali metals and some others similar to those of halogens is most likely to be _________

42 / 50

The attractive force which binds hydrogen atom of one molecule with an electronegative atom of another molecule is known as _________

43 / 50

Which of these elements has the electronic configuration of $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}$? __________

44 / 50

The phenomenon in which a metal is surrounded by solvent molecules is called ________

45 / 50

Alkaline metals are extracted mainly by _________

46 / 50

Hydrogen is discharged at ___________ electrode during the electrolysis of brine

47 / 50

_________ metals react with sulphur to form simple sulphides and polysulphides.

48 / 50

Why was Newlands law of octaves rejected? ____________

49 / 50

Lithium in the form of lithium stearate is used for the production of a substance known as __________ which minimizes friction between moving parts.

50 / 50

Hydride ion is unusually _________ with respect to size

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