TMA Solutions: CHM205 - Inorganic Chemistry II

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TMA Solutions: CHM205 - Inorganic Chemistry II

Postby Jed » Mon Jul 02, 2018 7:31 am

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1 The reaction C6H6 + HNO3 will give _____________.

C6H5NO2 +H2O



2 Dilute nitric acid will oxidise HI to ____________.

I


3 Dilute nitric acid will oxidise H2S to ____________.

S


4 Concentrated nitric acid readily oxidises solid non metals and metalloids to their respective

Oxoa cids or hydrated oxides


5 Concentrated nitric acid behaves as ______________.

An oxidising agent


6 Oxoacids in which the central atom is in a higher oxidation states are termed as

ic-acid


7 To distinguish between the oxidation states of the central atom in oxoacids, suffixes in which the central atom is in a lower oxidation state are termed ____________.

ous acid


8 The bond energy of N-N bond in hydrazine is very small due to _______.

Repulsion of the nonbonding electrons which weaken the N-N bond


9 Mineral silicates plays an important role in national economy because from it is produced

Glass, ceramics,cement


10 Which of the following statement is true ?

Stability of covalent hydrides of Group 4 elem ents decreases down the group because of decreasing M-H bond energies


11 Boron and silicon combine with carbon to form ___________.

Covalent carbides



12 _________ are formed by elements of 1,2, 3,11,12 and13 except boron.

Ionic carbides


13 The element with the highest electron affinity amongst the halogens is ___________.

Chlorine


14 The tendency of gaining an electron to acquire a stable noble gas configuration makes the halogens

High electron affinity



15 The reactivity of the various allotropes of phosphorus towards other substances decreases in the order?

bro wn-white-red-black


16 Which of the options below indicates how carbon behaves differently from other members of Group 4?

Carbon has a much higher electronegativity and higher ionisation en ergy than other elements in the group


17 Tin exhibit polymorphism because of _____________ .

It exists in two crystalline forms


18 ________ occurs in the elemental state as diamond and graphite.

Car bon


19 Tin is obtained by the ______.

Reduction of oxides of tin with ca rbon


20 Ammonifying bacteria present in the soil decompose plants and animals when they die into ________

Nitrogen and ammon ium compounds




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Jed
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Re: TMA Solutions: CHM205 - Inorganic Chemistry II

Postby Jed » Mon Jul 02, 2018 7:34 am

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21 Other halogens apart from fluorine exhibit variable oxidation states due to ________.

Other halogens have vacant d orbital whereas fluorine doesn't


22 The most stable hydride of phosphurous is _________.

Phosphine


23 In the gaseous state phosphorus exist as _________,

P4


24 All the elements of Group 5 can expand their octet except _____________.

Nitrogen


25 The difference between silica and silicate is ________.

Silica is made of SiO2 units whereas silicate is made of SiO4 units


26 The chief constituent of glass is ____________.

Silica


27 Sandstone, granite and slate are examples of ________.

Natural silicates


28 The purest and most stable form of silica is ____________

Quartz


29 The principal constituents of all rocks, clays and soils are ______.

Silicates


30 Which of the options below shows how carbon behaves differently from the rest of the elements in its group?

Carbon is the only element in the group that can form stable derivatives with double a nd triple bonds


31 Superphosphate of lime is a more effective fertilizer than phosphate rock because of

Ca(H2PO4)2 is water soluble


32 Lightning discharge in the atmosphere converts nitrogen to _________.

Nitric oxide


33 Hydrazine can act as a coordinating ligand forming complexes with metal ions because of _________.

It has lone pairs of electrons


34 The tetrahedron of the trihydrides of Group 5 elements is distorted due to repulsion between the lone pair of electrons and the bonded pairs giving these hydrides __________ structure.

Pyramidal


35 The compound among the options below with the least bond energy is ___________.

BiH3


36 Silica gel is _____________ form of Silicon dioxide.

Amorphous


37 Carbon dioxide is used in fire extinguishers because of ________.

It does not support combustion


38 ____________ are formed by combination of carbon with some transition metals.

Interstitial carbides


39 Which one of the following compounds is formed when carbides are decomposed by water or dilute acids?

Acetylen e


40 The tendency of ________ to form multiple bonds easily is due to its high bond energy and small atomic radius.

Carbo n




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Jed
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Re: TMA Solutions: CHM205 - Inorganic Chemistry II

Postby Jed » Mon Jul 02, 2018 7:36 am

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41 Group 5 elements form compounds mainly in two oxidation states, namely

+3 and +5


42 Hydrazine has how many lone pairs of electrons?

Two


43 Ammonia functions as an electron donor because of __________.

Lone pair of electron on the nitrogen atom available for donation


44 _____ is the main types of halides formed by Group 5 elements.

Trihalides


45 The forms of carbon include _________.

Coke, charcoal and carbon black


46 Diamond are used in jewellery on account of their ______.

High refractive index and dispersive power


47 Nitrogen react with metals of low ionisation energy because of ________.

Its small size and high electronegativity


48 Nitrogen is quite inert at room temperature because of ________.

Multiple bonds between its atoms



49 Coke and charcoal are formed by ___________.

Destructive distillation of coal and hardwood or bon es in the absence of air
Pyrolysis of coal and hardwood or bones in the absence of air
None of the above
***All of the above


50 The softest of the allotropes of carbon is ____________.

Graphite


51 Which of the following statement is true?

In carbonmonoxide, oxygen forms a coordina te bond with C by donating and sharing its lone pair of electrons


52 The product obtained when steam is passed over red hot coke is ___________.

CO



53 Fluorocarbons are resistant to attack by acids, alkalis, oxidizing and reducing agents because of__________.

The greater strenght of th e C-F bond and the large size of fluorine


54 Al4C3 is an example of ____________.

Carbide


55 Which of the following is capable of forming comparatively stable multiple bonds?

Car bon



56 What is the reason why nitrogen is not able to form coordination number beyond four, whereas other members of its group is able?

P, As, Sb and Bi can attain sp3d and sp3d2 hydridisation whereas nitroge n cannot


57 Which of the following have high small size and high electronegativity?

Nitrogen


58 ________________ is used to create inert atmosphere where the presence of air would involve fire explosion, hazards or undesirable oxidation products.

Nitrogen


59 Among Group 5 elements, increase in atomic number leads to increase in ________.

Atomic radii


60 Nitrogen is obtained commercially from ___________.

Fractional dist illation of liquid air



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Jed
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Re: TMA Solutions: CHM205 - Inorganic Chemistry II

Postby Jed » Mon Jul 02, 2018 7:39 am

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61 Which of the following statement is correct?

Hydrolysis of silicon tetrachloride gives silicic ac id


62 Among the Group 4 elements moving from carbon to silicon the covalent radius increases sharply afterwards the increase is gradual, this is attributed to __________.

As we move down the group after silicon, effective nuclear ch arge outbalances the effect of additional shell leading to only a marginal increase in size


63 The elements of Group 4 show oxidation states of _____

+2 and +4


64 Group 4 elements form mostly covalent compounds because of _______.

Very large amount of energy is required to form a M4+ ion


65 Diamond is not a conductor of electricity because of _________.

It does not have delocalised electrons


66 Which of the following options is used in glass and cement manufacture.

Lead


67 ________ is used to strenghten rubber, as a pigment in inks, paints, paper and plastics.

Carbo n black


68 _________ is used for making crucibles, as a lubricant in heavy machines and as pencil lead.

Graphite


69 Tin is obtained by ___________.

Reduction of oxides of tin with carb on


70 Although diamond occur in nature but it can be obtained artificially by __________.

Subjecting carbon to high temperature and pressure


71 Germanium is obtained by ____________.

Reduction of germanium dioxide with car bon or hydrogen


72 Commercial form of silicon can be obtained by __________.

Reduction of silicon dioxide with calcium II carbide in an electric furnace


73 _______ is formed when petroleum gases or natural gas is burnt in a limited supply of air.

Carbon black


74 Diamond and SiC (silicon carbide) have the same structure, but, they differ in that

In diamond , each carbon is tetrahedra lly bonded to four other carbons, while in SiC silicon is tetrahedrally bonded to four other carbons


75 The ability of the molecules of graphite held together to slide pass one another imparts in it

Softness



76 Diamond is one of the hardest substances known due to the presence of _____ in its structure.

Three dimensional lonkage s


77 The different layers or molecules of graphite are held together by __________.

van der Waa ls forces


78 __________ is a component of coal and petroleum.

Carbon


79 Diamond behaves as an insulator because of __________.

Strong covalent bonds formed within its molecule restricting mobility of electrons


80 ___________ occurs in the elemental state as diamond and graphite.

Car bon





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