Give reasons for the following : a. `Snl_4` is orange in colur . b. Solid ice is known as dry ice . c. Diamond is inert , wheresas gfraphite is not . d. Nitrolim acts as a good nitrogenous fertiliser .

Give reasons for the following : a. `Snl_4` is orange in colur . b. So

1.	Give reasons for the following : a. `Snl_4` is orange in colur . b. Solid ice is known as dry ice . c. Diamond is inert , wheresas gfraphite is not . d. Nitrolim acts as a good nitrogenous fertiliser .
Answer» a. `Snl_4` absorbs bleu light and reflects high proportion of orange or red . The ergy avbsorbed in this way causes he transfer of an electron from `I` to `Sn` which correspond to the temporary oxidation of `Sn (IV)` to `Sn(III)`. Sice transferring an electron to another atom is same as transferring a charge charge transfer complex is formed and due to whcih `Snl_4` is roange in colou. b. Solid ice at `1` atm pressure sublimes i.e., changes form slid state to gaseou sate without liquefying . As a result , solid ice does not wet the surface and is known as dry ice . c. In diamojnd each `C` atom si `sp^3` hybrdised and a C-atom si terahedrally bonded to foru other c-atoms whcih emans there is no unpaired electron left in the struture of diamond . Hence it is incer , whereas in graphite `C` is `sp^2` hyvbrised and ther si one upared eelctron on each `C` atom which is free and hence due to availabiluty of unpaired electrons grahite is reactive . d. Nitrolim is `CaNCN` , i.e., calcium, into calcium carbonate and cyanamide . `CaNCn + H_2 O +CO_2 rarr CaCO_2 darr + underset (Cyanamide) (H_2 N.CN)` the ctyanamide then ghydrolyses into two steps : i. `H_2 N.Cn +H_2O rarr H_2 underset (Urea) (NCONH_2)` ii. ` H-2 CONH_2 +H_2O rarr 2NH_2 +CO_2 uarr` Ammonia `(NH_3)` is converted into intrates by nitrifying vacterica . On account of its show conversion into intrates and `NH_3`, nitrolim or `CaNCN` acts as a goode nitrogenous fertiliser.

Discussion

No Comment Found

Related InterviewSolutions

Identify `X` and `Y` in the following reactions . `PbS underset("in air") overset (Heat) (rarr) (X)` `(X) + PbS overset (Y) (rarr) pb+SO_(2)`.
Assertion (A) :` Pb^(+4)` compounds are stronger oxidiising agents than ` Sn^(4+)` compounds . Reason (R): The higher oxidation states for group `14` elements are more stable for the heavier members of the group due to inert pair effect .A. If bothe (A) and ( R) are correct and (R) is correct eplanation of (A)B. If bothe (A) and ( R) are correct and (R) is correct eplanation of (A)C. If (A) is correct , buyt (R) is incrorect .D. If (A) is incrorect byt ( R) is correct .
Assertion (A) :` Pb^(+4)` compounds are stronger oxidiising agents than ` Sn^(3+)` compounds . Reason (R): The higher oxition states for grouup `14` eelments are more stable for the heavier members of the frop due to inert pair effect .A. If both (A) and (R) are correct and (R) is correct explanation of (A)B. If both (A) and (R) are correct and (R) is not correct explanation of (A)C. If (A) is correct , but (R) is incorrectD. If (A) is incorrect but (R) is correct .
vii. The stability of dihlides of ` Si, Ge , Sn` and Pb increases steadily in the sequence :A. `PbX_(2) lt SnX_(2) lt GeX_(2) ltSiX_(2)`B. `GeX_(2) lt SiX_(2) ltSnX_(2) ltPbX_(2)`C. `SiX_(2)ltGeX_(2) ltPbX_(2) ltSnX_(2)`D. `SiX_(2) ltGeX_(2) ltSnX_(2) ltPbX_(2)`
Assertion: `Pb^(4+)`can be reduced easily to `Pb^(2+)`. Reason: `Pb^(2+)` is paramagnetic.A. If both (A) and (R) are correct and (R) is correct explanation of (A)B. If both (A) and (R) are correct and (R) is correct explanation of (A)C. If (A) is correct , but (R) is incorrectD. If (A) is incrorect byt (R) is incroroect .
`CO_2` and `H_2 O` absorbs strongly in the infrared rrgion and its presence in the atmospheere dectrases the loss fo heat form the enrth by radistiion . This global warming is called the greenhouse effect (other gases , including the oxides of nitraongen form car exhauset freons from aerosols and refrigeratirs and methane from bacteria in the soil and in the rument cows , also add to the reeenhouse effect ). The concentration fo atmospheric `CO_2` has increased by `10%` . The is rsulting in the increase in the mean temperature fo the earth by `2. 5^@ C`, varying form `2^@ C` t the equlator to `4^@ C` at the poles . This could have dramatic effects on the climate. Instead of monitoring carbon dioxide suggest another gas that scientists could studey to substantiate the fact that ` CO_2` conentration is steadily increasing in the atmosphere ?A. `N_2O`B. `O_2`C. `CH_4`D. `O_3`
`CO_2` and `H_2 O` absorbs strongly in the infrared rrgion and its presence in the atmospheere dectrases the loss fo heat form the enrth by radistiion . This global warming is called the greenhouse effect (other gases , including the oxides of nitraongen form car exhauset freons from aerosols and refrigeratirs and methane from bacteria in the soil and in the rument cows , also add to the reeenhouse effect ). The concentration fo atmospheric `CO_2` has increased by `10%` . The is rsulting in the increase in the mean temperature fo the earth by `2. 5^@ C`, varying form `2^@ C` t the equlator to `4^@ C` at the poles . This could have dramatic effects on the climate. As a result of freenhouse effect , thers can be : A: an increase in rate of egvaporation of water thus, untimely more rain , floodingn tec . B: tropical storms in certain parts of the workd C: a decrease in `pH` of the soil D: an increase in `pH` of the soil select correct altemate :A. `B,C,D`B. `A,C,D`C. `A,B,D`D. `A,B,C`
`CO_2` and `H_2 O` absorbs strongly in the infrared rrgion and its presence in the atmospheere dectrases the loss fo heat form the enrth by radistiion . This global warming is called the greenhouse effect (other gases , including the oxides of nitraongen form car exhauset freons from aerosols and refrigeratirs and methane from bacteria in the soil and in the rument cows , also add to the reeenhouse effect ). The concentration fo atmospheric `CO_2` has increased by `10%` . The is rsulting in the increase in the mean temperature fo the earth by `2. 5^@ C`, varying form `2^@ C` t the equlator to `4^@ C` at the poles . This could have dramatic effects on the climate.Which of the following is growing at a fastre rate than ` CO_2` and thus responsible for the greenhouse effect ?A. `CFC`B. `N_2O`C. `O_3`D. `CH_4`
Assertion (A) : `CO_2` is a gas but `SiO_2` had a three -dimenstional network structurte . Reason (R): `CO_2` bonds nut `SiO_2` has a three-dimensional network structure .A. If both (A) and (R) are correct and (R) is correct explanation of (A)B. If both (A) and (R) are correct and (R) is not correct explanation of (A)C. If (A) is correct , but (R) is incorrectD. If (A) is incorrect but (R) is correct .
` CO_2` is used for extinguisng fire because it is neither combustible not a supporter of combustion .

Give reasons for the following : a. `Snl_4` is orange in colur . b. Solid ice is known as dry ice . c. Diamond is inert , wheresas gfraphite is not . d. Nitrolim acts as a good nitrogenous fertiliser .

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment