52 inorganic chemistry questions AND answers (CHM 101) YOU NEED TO STUDY

1 : The ability of an element to participate in a chemical reaction is measured in form of its --------- Ans - ionization energy

2 : Electron affinity can be affected by all but except----------- Ans - mass number

3 : In the mordern form of Mendeleev peroidic table, elements are arranged in --------horizontal rows. Ans - 7

4 : _________ used the Law of the Octave to arrange atoms Ans - John Newlands



5 : _____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. Ans - Hund's rule

6 : __________ arranged elements in order of increasing atomic weight on a line which spiraled around a cylinder from bottom to top Ans - De Chanourtios

7 : Halogens have ------ electron affinity Ans - high

8 : ________and____________ tried to classify elements into periods Ans- De Chancourtois and Dobereiner

9 : An orbital can have at the most two electrons of opposite spin can be called the ------- Ans -pauli Exclusion principle

10 : Increase in principal quantum number(n) means-----of the atomic radii Ans - increase

11 : The alkali metals belong to the ------ elements Ans - s-block

12 : The second ionization energy of alkaline earth metals is less than that of corresponding alkali metals because-------- Ans - of stability of a closed shell configuration

13 : ____is the energy released or absorbed when an electron is added to the gaseous atom in its ground state Ans - electron affinity

14 : The properties of elements are periodic functions of their atomic numbers is the----------- Ans - Mordern periodic law


15 : ____________is the enthalpy change when one mole of crystal lattice is formed from the isolated gaseous ions Ans - lattice energy

16 : _________is the tendency of an atom to attract towards itself the shared electron pair of a bond in which it is involved Ans - electronegativity

17 : What property was used by Mendeleev to classify the elements? Ans - chemical properties

18 : In the equation for ionization,effective nuclear charge is represented as------ Ans - Z

19 : Which is of these peroids of the peroidic table has only eight elements? Ans - 3

20 : The positions of K and Ar,Co and Ni do not remain anomalous any longer since --------- is used in arranging the elements. Ans - atomic number

21 : Arrange the following metals in an increasing order of their boiling point LI,Cs,Rb,K Ans - Cs,K,Rb,Li

22 : Arrange the following alkali metals in order of their atomic number,Na,K,Li, Ans - Li,Na,K

23 : According to _________, electronegativity is equated to the force of attraction between an atom and
the electron separated by a distance equal to the covalent radius of the atom. Ans- Alfred Rochow

24 : __________is a requirement in the electrolysis of beryllium chloride Ans - Sodium Chloride

25 : In the extraction of calcium from fused calcium chloride,is used as the anode Ans - graphite

26 : On exposure to air alkaline earth metals lose their silvery luster because ___ Ans

- a layer of oxide is formed on their surface

27 : All the alkaline earth metals form ionic compounds except_____  Ans- beryllium

28 : Calcium compounds give out a characteristic flame colouration of _______  Ans - brick red

28 : The hydrogen energies of alkaline earth metal ions are much greater than those of alkali metals because Ans - they are smaller with increased cationic charge

29 : The first ionization energy of alkaline earth metals is more than that of corresponding alkali metals because_____ Ans - the alkaline earth metals have higher nuclear charge and are smaller in size

30 : ___________ is extremely rare and it is a radioactive element Ans - raduim

31 : ___________ is the second most abundant metallic element in sea water Ans - magnesuim

32 : The strong cohesive forces present in the lithium atom gives rise to__________

Ans - softness

33 : Hydrides of alkali metals react with water to librate?______________
Ans - hydrogen

34 : Which of these alkalis has the most stable floride?______________ Ans- lithium

35 : Why was Newlands law of octaves rejected?____________
Ans - It could not hold good for elements heavier than calcium


36 : Which property was used by Mendeleev to classify elements?_______________
Ans - chemical properties


37 : Which of the alkali metals is the most electropositive?_____________________ Ans - caesuim

38 : The presence of hydrogen bond in most molecules is responsible for __________. Ans – high boiling point

39 : The tendency of an atom to attract towards itself shared electron pair of a bond is known as _________. Ans – Electronegativity


40 Stability of alkali salts depends on which of the following?__________
Ans - enthalpy of formation of the salt

41 : How many electrons are in potassium atom?__________ Ans - 19

42 How many elements are there in period 6 of the periodic table ? ______ Ans - 32

43 : Which element in the periodic table behave partly as the alkaline metals as well as a halogen element? ____________ Ans – Hydrogen

44 : Which elements has the electronic configuration of 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}? Ans – Cu



45 : __________ forms an oxide also known as heavy water. Ans – Deutrium

46 : Which of the isotopes of hydrogen is radioactive? Ans – Tritium

47: Hydrogen can be obtained economically as a biproduct in the electrolysis of______ Ans – brine

48 : Hydrogen may not be advantagous as a fuel because Ans
- it is a secondary source of energy

49 : When alkali metals are heated with hydrogen they form ________hydrides Ans – ionic

50 : Silt is an example of _________ hydride Ans - Covalent

51 : Sodium Hydride is an example of ________ hydride Ans – ionic

52 : In the group of the alkali metals the degree of hydration _________down the group. Ans – decreases