197 + Interview Questions in 14TH-GROUP-ELEMENTS IN GENERAL AWARENESS Page 1 InterviewSolution

1.	Between `SiCl_(4)` and `C Cl_(4)`, only `SiCl_(4)` reacts with water. `SiCl_(4)` is ionic and `C Cl_(4)` is covalent.A. Statement-I is True, Statement-II is True : Statement-II is a correct explanation for Statement-IB. Statement-I is True, Statement-II is True : Statement-II is `NOT` a correct explanation for Statement-IC. Statement-I is True, Statement-II is False.D. Statement-I is False, Statement-II is True.
Answer» Correct Answer - C

Discussion

2.	The mineral lapis Lazuli is a spendid blue colur and was highly prized as a pigment for oil paintings. It contains ultramarine `Na_(x) [(AlSiO_(4))_(y)] S_(Z)`. Then x - y is:
Answer» Correct Answer - 2

Discussion

3.	Which of the following is used as black pigment in back ink and as filler in automobile tyres ?A. Carbon blackB. GermaniumC. GraphiteD. Coke
Answer» Correct Answer - A

Discussion

4.	Calculate the minimum number of moles of `R - Mg - X` (Grignard reagent) required in the formation of a mole of cyclic silicone.
Answer» Correct Answer - 6

Discussion

5.	`CCl_(4)` is stable towards hydrolysis in water whereas `SiCl_(4)` is easily hydrolysed by water becauseA. carbon is more electropositive than siliconB. `CCl_(4)` is covalent whereas `SiCl_(4)` is ionicC. Silicon has a 3d orbital available for further coordination with water whereas carbon has no dorbital for bondingD.
Answer» Correct Answer - C

Discussion

6.	Assertion : Si-Si bond is stronger than Si-O bond. Reason: Silicon form Si-Si bond easily.A. Both Statement -I and Statement -II are true and Statement -II is the correct explanation of Statement-I.B. Both Statement -I and Statement -II are true and Statement-II is not the correct explanation of Statement-I.C. Statement-I is true and Statement-II is falseD. Statement-I is false but Statement -II is true
Answer» Correct Answer - A

Discussion

7.	Which of the following is not hydrolysed easilyA. `CCl_(4)`B. `SiCl_(4)`C. `GeCl_(4)`D. `SnCl_(4)`
Answer» Correct Answer - A

Discussion

8.	Which of the following statements are correct ?A. Graphite is thermodynamically more stable than diamondB. `alpha` - graphite has layers arranged as ABAB sequenceC. `beta` - graphite has layer arranged as ABCABC sequenceD. The number of C-atoms per unit lattice of diamond is 8.
Answer» Correct Answer - A::B::C::D

Discussion

9.	Which of the following halides is least stable and has a doubtful existence ?A. `Cl_(4)`B. `GeI_(4)`C. `SnI_(4)`D. `PbI_(4)`
Answer» Correct Answer - D

Discussion

10.	Which of the following halides does not exist ?A. `PbF_(4)`B. `PbCl_(4)`C. `PbBr_(4)`D. `PbI_(4)`
Answer» Correct Answer - D

Discussion

11.	Which does not existA. `[SnCl_(6)]^(2-)`B. `[GeCl_(6)]^(2-)`C. `[SiCl_(6)]^(2-)`D. `[CCl_(6)]^(2-)`
Answer» Correct Answer - D

Discussion

12.	The number of corner of O atom shared per tetrahedron in 2D silicate is_______
Answer» Correct Answer - 3

Discussion

13.	Silicon. The element silicon has two allotropic modification (a) Amorphous silicon (b) Adamantine silicon. A third allotropic modification has been observed and is of doubtful character known as graphitoidal silicon. Amorphous silicon is obtained by heating well-powdered quartz of finely silica with magnesium powder in a fireclay which is suitable for the manufacute of crucibles. `SiO_(2)+2Mg to Si+2MgO` The product is washed with dilute HCl to wash away MgO and then with hydrofluoric acid to remove uncharged silica. Silicon reacts with fused aqueous NaOH to formA. `SiO_(2)`B. `SiO_(2)^(2-)`C. `SiO_(3)^(2-)`D. `SiO`
Answer» Correct Answer - C

Discussion

14.	Match the following: `{:(,"Column I",,"Column II",),(A,"Quartz",(P),"Three corners of "SiO_(4)^(4-) " tetrahedron are shared",),(B,"Amorphous" SiO_(2),(q),"Two corners of "SiO_(4)^(4-) " are shared",),(C,"Sheet Silicates",(r),"All four corners of " SiO_(4)^(4) " are symmetrically shared",),(D,"Cyclic silicates ",(s),"Corners of " SiO_(4)^(4-) " are randomly linked",):}`
Answer» Correct Answer - A-r, B-s, C-p, D-q

Discussion

15.	Silicon. The element silicon has two allotropic modification (a) Amorphous silicon (b) Adamantine silicon. A third allotropic modification has been observed and is of doubtful character known as graphitoidal silicon. Amorphous silicon is obtained by heating well-powdered quartz of finely silica with magnesium powder in a fireclay which is suitable for the manufacute of crucibles. `SiO_(2)+2Mg to Si+2MgO` The product is washed with dilute HCl to wash away MgO and then with hydrofluoric acid to remove uncharged silica. When silica is heated with carbon then silica is reduced toA. SiB. SiOC. `SiO_(3)^(2-)`D. SiC
Answer» Correct Answer - D

Discussion

16.	Silicon. The element silicon has two allotropic modification (a) Amorphous silicon (b) Adamantine silicon. A third allotropic modification has been observed and is of doubtful character known as graphitoidal silicon. Amorphous silicon is obtained by heating well-powdered quartz of finely silica with magnesium powder in a fireclay which is suitable for the manufacute of crucibles. `SiO_(2)+2Mg to Si+2MgO` The product is washed with dilute HCl to wash away MgO and then with hydrofluoric acid to remove uncharged silica. Crystalline silicon may be obtained by heating potassium silicon fluoride withA. AlB. CC. ZnD. Both (A) and (C )
Answer» Correct Answer - D

Discussion

17.	Which is the amorphous form of silicaA. QuartzB. TridymiteC. OnyxD. Crystobalite
Answer» Correct Answer - C

Discussion

18.	The final product formed when silica reacts with hydrogen fluoride isA. SiFB. `H_(2) Si F_(6)`C. `H_(2) Si F_(4)`D. `H_(2) Si O_(3)`
Answer» Correct Answer - B

Discussion

19.	The correct statement with respect to CO isA. It combines with `H_(2)O` to give carbonic acidB. It reacts with haemoglobin in RBCC. It is a powerful oxidizing agentD. It is used to prepare aerated drinks
Answer» Correct Answer - B

Discussion

20.	Which is correct in the case of carbonA. It forms complexesB. It shows inert pair effectC. It exhibits catenation propertyD. Its tetra halides undergo hydrolysis
Answer» Correct Answer - C

Discussion

21.	Which of the following is used as refrigerantA. `SO_(2)`B. `CHCl_(3)`C. SiCD. `CF_(2)Cl_(2)`
Answer» Correct Answer - D

Discussion

22.	Silicon dissolves in excess of HF due to formation ofA. `SiF_(4)`B. `SiH_(4)`C. `H_(2)SiF_(6)`D. `H_(2)SiF_(4)`
Answer» Correct Answer - C

Discussion

23.	An oxide of an element is a gas and dissolves in water to give an acidic solution. The element belongs toA. II A groupB. IV A groupC. VIII groupD. Zero group
Answer» Correct Answer - B

Discussion

24.	Which element can form the most acidic oxideA. CarbonB. LeadC. SiliconD. Germanium
Answer» Correct Answer - A

Discussion

25.	The element which forms neutral as well as acidic oxide isA. SnB. SiC. CD. Pb
Answer» Correct Answer - C

Discussion

26.	The neutral oxide isA. `CO_(2)`B. `SiO_(2)`C. GeO_(2)`D. CO
Answer» Correct Answer - D

Discussion

27.	When oxalic acid is heated cone. `H_(2)SO_(4)`, two gases producd are neutral and acidic in nature respectively. Pottasium hydroxide absorbs on the two gases. The product formed during this absorption and the gas which absorbed are respetivelyA. `K_(2)CO_(3) " and " CO_(2)`B. `H_(2)CO_(3) " and " CO_(2)`C. `K_(2)CO_(3) " and " CO`D. `KHCO_(3) " and " CO`
Answer» Correct Answer - A

Discussion

28.	Which gas is essential constituent of almost all fuel gasesA. `CO_(2)`B. `N_(2)`C. COD. `SO_(2)`
Answer» Correct Answer - C

Discussion

29.	When `SO_(2)` is passed through sodium carbonate solution, then `CO_(2)` gas is liberated. This is becauseA. `CO_(2)` is more volatile than `SO_(2)`B. `CO_(2)` has a lower molecular weight than `SO_(2)`C. `SO_(2)` is a stronger acid than `CO_(2)`D. `CO_(2)` is a stronger acid than `SO_(2)`
Answer» Correct Answer - A::B

Discussion

30.	`H_(2)SO_(4)` is not used for preparation of `CO_(2)` from marble chips becauseA. it does not reactB. huge amount of heat is evolvedC. the reaction is vigorousD. calcium sulphate formed is sparingly soluble and gets deposited on marble chips which stops further reaction
Answer» Correct Answer - D

Discussion

31.	CO can be used as a fuel but not `CO_(2)` becauseA. `CO_(2)` is not a good fuelB. CO is a good fuelC. CO can be oxidized but not `CO_(2)`D. `CO_(2)` can be oxidized but not CO
Answer» Correct Answer - C

Discussion

32.	An example of major air pollutant isA. `O_(2)`B. `CO_(2)`C. COD. He
Answer» Correct Answer - C

Discussion

33.	Match the following: Column I (A) Density (B) Melting point (C) Electro negativity (D) Metallic charcter Column II (p) Increases from carbon to lead (q) Decreases from carbon to tin and then increases (r) Decreases from diamond to silicon and then increases (s) Decreases from carbon to silicon and then it is almost same (t) Decrease from carbon to lead
Answer» Correct Answer - A::B::C::D

Discussion

34.	The type of sigma bond between C-C in graphite isA. sp-spB. `sp^(3) - sp^(3)`C. p-pD. `sp^(2) - sp^(2)`
Answer» Correct Answer - D

Discussion

35.	How many of the following substances/molecules/ion have bond order 1.33 ? `BF_(3)`, Boron nitride, graphite, `NO_(3)^(-), SO_(3)^(2-), SO_(4)^(2-), PO_(4)^(3-)`
Answer» Correct Answer - 5

Discussion

36.	Carbon dioxide is a gas but silica is a solid becauseA. Carbondioxide is composed of discrete covalent `CO_(2)` molecules where as silica has continuous tetrahedral structureB. `CO_(2)` molecules are lighter than `SiO_(2)` moleculesC. `CO_(2)` is more acidic than `SiO_(2)`D. Melting point of silica is very high
Answer» Correct Answer - A

Discussion

37.	Mathc the column
Answer» Correct Answer - A::B::C::D

Discussion

38.	Mathc the following
Answer» Correct Answer - A::B::C::D

Discussion

39.	Mathc the following (A) Two dimensional sheet silicate (B) Pyroxene chain silicate (C) Pyro silicate (D) Amphibole chain silicate Column II (p) `(SiO_(3))_(n)^(2n-)` (q) `(Si_(4)O_(11))_(n)^(6n-)` (r) 3-corner oxygen atoms of each `SiO_(4)^(4-)` units are shared (s) non-planar
Answer» Correct Answer - A::B::C::D

Discussion

40.	`CO_(2)` and `N_(2)` are non-supporters of combustion.However for putting out fires `CO_(2)` is preferred over `N_(2)` because `CO_(2)`A. Does not burnB. Forms non combustible products with burning substancesC. Is denser that nitrogenD. Is a more reactive gas
Answer» Correct Answer - C

Discussion

41.	Which is correct regarding `CO_(2)`.A. Involves in photosynthesisB. Causes green house effectC. Dry ice is used as a refrigaerant for ice cream & frozen food.D. All of these
Answer» Correct Answer - D

Discussion

42.	Which of the following statements is true ?A. Dimethyl ether is a better Lewis base than disilyl either `(SiH_(3) - O - Si H_(3))`B. `(CH_(3))_(3) C - O - H` is less acidic than `(CH_(3))_(3) Si - O - H`C. Both the statement (A) and (B) are trueD. Both the statements (A) and (B) are false
Answer» Correct Answer - C

Discussion

43.	Correct statement among the following isA. CNC bond angle in `Nme_(3)` is greater than `SiNSi` bond angle in `N (SiMe_(3))_(3)`B. Methyl isocyanate `(CH_(3) - N = C = O)` is bent with respect to nitrogen but silyl isocyanate `(SiH_(3) - N = C = O)` is linear with respect to the sameC. In trisily amine `[(SiH_(3))_(3)N]` all `N - Si` bond lengths are longer than the expected `N - Si` bond lengthD. All the above statements are correct
Answer» Correct Answer - B

Discussion

44.	Purest form of silica isA. QuartzB. FlintC. Sand stoneD. Keiselguhr
Answer» Correct Answer - A::B::C::D

Discussion

45.	The purest form of coal isA. PeatB. AnthraciteC. LigniteD. Bituminous
Answer» Correct Answer - B

Discussion

46.	Inert form of carbon isA. DiamondB. GraphiteC. CoalD. Charcoal
Answer» Correct Answer - A

Discussion

47.	Which one of the following elements reduces NaOH to NaA. SiB. PbC. CD. Sn
Answer» Correct Answer - C

Discussion

48.	Carbon tetrachloride has no net dipole moment because ofA. Planar structureB. Smaller size of C and Cl atomsC. Regular tetrahedral strucuteD. None of these
Answer» Correct Answer - C

Discussion

49.	A compound (X) when heated with conc. `H_(2)SO_(4)` gives one gaseous product, which under pressure forms sodium methanoate with `NaOH`. How many of the list- HCOOH, `K_(4)Fe (CN)_(6), H_(2)C_(2)O_(4), CH_(2) (COOH)_(2)` can be (X) ?
Answer» Correct Answer - 2

Discussion

50.	A scarlet red compound (X) on treatment with conc. `HNO_(3)` gives compounds (Y) and (Z). (Z) with HCL produces a chloride compond (A) which can also be produced by treating (X) with conc HCL. Compounds (X), (Z) and (A) will beA. `Mn_(3)O_(4), MnO_(2), MnCl_(2)`B. `Pb_(3)O_(4), PbO_(2), PbCl_(2)`C. `FeO_(4), Fe_(2)O_(3), FeCl_(2)`D. `Fe_(3)O_(4), Fe_(2)O_(3), FeCl_(3)`
Answer» Correct Answer - B

Discussion

Explore topic-wise InterviewSolutions in .

The mineral lapis Lazuli is a spendid blue colur and was highly prized as a pigment for oil paintings. It contains ultramarine `Na_(x) [(AlSiO_(4))_(y)] S_(Z)`. Then x - y is:

Which of the following is used as black pigment in back ink and as filler in automobile tyres ?A. Carbon blackB. GermaniumC. GraphiteD. Coke

Calculate the minimum number of moles of `R - Mg - X` (Grignard reagent) required in the formation of a mole of cyclic silicone.

Which of the following is not hydrolysed easilyA. `CCl_(4)`B. `SiCl_(4)`C. `GeCl_(4)`D. `SnCl_(4)`

Which of the following statements are correct ?A. Graphite is thermodynamically more stable than diamondB. `alpha` - graphite has layers arranged as ABAB sequenceC. `beta` - graphite has layer arranged as ABCABC sequenceD. The number of C-atoms per unit lattice of diamond is 8.

Which of the following halides is least stable and has a doubtful existence ?A. `Cl_(4)`B. `GeI_(4)`C. `SnI_(4)`D. `PbI_(4)`

Which of the following halides does not exist ?A. `PbF_(4)`B. `PbCl_(4)`C. `PbBr_(4)`D. `PbI_(4)`

Which does not existA. `[SnCl_(6)]^(2-)`B. `[GeCl_(6)]^(2-)`C. `[SiCl_(6)]^(2-)`D. `[CCl_(6)]^(2-)`

The number of corner of O atom shared per tetrahedron in 2D silicate is_______

Which is the amorphous form of silicaA. QuartzB. TridymiteC. OnyxD. Crystobalite

The final product formed when silica reacts with hydrogen fluoride isA. SiFB. `H_(2) Si F_(6)`C. `H_(2) Si F_(4)`D. `H_(2) Si O_(3)`

The correct statement with respect to CO isA. It combines with `H_(2)O` to give carbonic acidB. It reacts with haemoglobin in RBCC. It is a powerful oxidizing agentD. It is used to prepare aerated drinks

Which is correct in the case of carbonA. It forms complexesB. It shows inert pair effectC. It exhibits catenation propertyD. Its tetra halides undergo hydrolysis

Which of the following is used as refrigerantA. `SO_(2)`B. `CHCl_(3)`C. SiCD. `CF_(2)Cl_(2)`

Silicon dissolves in excess of HF due to formation ofA. `SiF_(4)`B. `SiH_(4)`C. `H_(2)SiF_(6)`D. `H_(2)SiF_(4)`

An oxide of an element is a gas and dissolves in water to give an acidic solution. The element belongs toA. II A groupB. IV A groupC. VIII groupD. Zero group

Which element can form the most acidic oxideA. CarbonB. LeadC. SiliconD. Germanium

The element which forms neutral as well as acidic oxide isA. SnB. SiC. CD. Pb

The neutral oxide isA. `CO_(2)`B. `SiO_(2)`C. GeO_(2)`D. CO

Which gas is essential constituent of almost all fuel gasesA. `CO_(2)`B. `N_(2)`C. COD. `SO_(2)`

When `SO_(2)` is passed through sodium carbonate solution, then `CO_(2)` gas is liberated. This is becauseA. `CO_(2)` is more volatile than `SO_(2)`B. `CO_(2)` has a lower molecular weight than `SO_(2)`C. `SO_(2)` is a stronger acid than `CO_(2)`D. `CO_(2)` is a stronger acid than `SO_(2)`

`H_(2)SO_(4)` is not used for preparation of `CO_(2)` from marble chips becauseA. it does not reactB. huge amount of heat is evolvedC. the reaction is vigorousD. calcium sulphate formed is sparingly soluble and gets deposited on marble chips which stops further reaction

CO can be used as a fuel but not `CO_(2)` becauseA. `CO_(2)` is not a good fuelB. CO is a good fuelC. CO can be oxidized but not `CO_(2)`D. `CO_(2)` can be oxidized but not CO

An example of major air pollutant isA. `O_(2)`B. `CO_(2)`C. COD. He

The type of sigma bond between C-C in graphite isA. sp-spB. `sp^(3) - sp^(3)`C. p-pD. `sp^(2) - sp^(2)`

How many of the following substances/molecules/ion have bond order 1.33 ? `BF_(3)`, Boron nitride, graphite, `NO_(3)^(-), SO_(3)^(2-), SO_(4)^(2-), PO_(4)^(3-)`

Mathc the column

Mathc the following

Mathc the following (A) Two dimensional sheet silicate (B) Pyroxene chain silicate (C) Pyro silicate (D) Amphibole chain silicate Column II (p) `(SiO_(3))_(n)^(2n-)` (q) `(Si_(4)O_(11))_(n)^(6n-)` (r) 3-corner oxygen atoms of each `SiO_(4)^(4-)` units are shared (s) non-planar

`CO_(2)` and `N_(2)` are non-supporters of combustion.However for putting out fires `CO_(2)` is preferred over `N_(2)` because `CO_(2)`A. Does not burnB. Forms non combustible products with burning substancesC. Is denser that nitrogenD. Is a more reactive gas

Which is correct regarding `CO_(2)`.A. Involves in photosynthesisB. Causes green house effectC. Dry ice is used as a refrigaerant for ice cream & frozen food.D. All of these

Which of the following statements is true ?A. Dimethyl ether is a better Lewis base than disilyl either `(SiH_(3) - O - Si H_(3))`B. `(CH_(3))_(3) C - O - H` is less acidic than `(CH_(3))_(3) Si - O - H`C. Both the statement (A) and (B) are trueD. Both the statements (A) and (B) are false

Purest form of silica isA. QuartzB. FlintC. Sand stoneD. Keiselguhr

The purest form of coal isA. PeatB. AnthraciteC. LigniteD. Bituminous

Inert form of carbon isA. DiamondB. GraphiteC. CoalD. Charcoal

Which one of the following elements reduces NaOH to NaA. SiB. PbC. CD. Sn

Carbon tetrachloride has no net dipole moment because ofA. Planar structureB. Smaller size of C and Cl atomsC. Regular tetrahedral strucuteD. None of these

A compound (X) when heated with conc. `H_(2)SO_(4)` gives one gaseous product, which under pressure forms sodium methanoate with `NaOH`. How many of the list- HCOOH, `K_(4)Fe (CN)_(6), H_(2)C_(2)O_(4), CH_(2) (COOH)_(2)` can be (X) ?