52671 + Interview Questions in Chemistry in Class 11

1.	The hybridisation of orbitals of N atom in NO_(3)^(-), NO_(2)^(+) and NH_(4)^(+) are respectively ……………………..
Answer» SOLUTION :`SP^(2), sp, sp^(3)`

Discussion

2.	The hybridisation of carbons of C-C single bond of HC-=C-CH=CH_(2) is
Answer» `sp^(3)-sp^(3)` `sp-sp^(2)` `sp^(3)-sp` `sp^(2)-sp^(3)` SOLUTION :`H_(2)OVERSET(sp^(2))(C)=overset(sp^(2))(CH)-overset(sp)(C)-=overset(sp)(C)H`

Discussion

3.	The hybridisation of carbons in benzene is
Answer» `SP & sp^2` `sp^2 & sp^3` `sp & sp^3` `sp^2` only ANSWER :D

Discussion

4.	The hybridisation of carbon in methyl cation is…..
Answer» `SP^(3)` `sp^(2)` sp `DSP^(3)` Answer :B

Discussion

5.	The hybridisation of carbon in alkane serise is which type?
Answer» `SP^(2)` `sp^(3)` sp `dsp^(2)` ANSWER :B

Discussion

6.	The hybridisation of carbon atoms in C-C single bond H-C equiv CH=CH_(2) is
Answer» `SP^(3)-sp^(3)` `sp^(2) - sp^(3)` `sp-sp^(3)` `sp-sp^(2)` SOLUTION :`sp-sp^(2)`

Discussion

7.	The hybridisation of carbon atoms in C-C single bond H-C equiv C-CH_(3) is
Answer» `SP^(3)-SP3` `sp2-sp3` `sp-sp3` `sp-sp3` ANSWER :D

Discussion

8.	The hybridisation of C in diamond, graphite and ethyne is in the order
Answer» `SP^(3),sp,sp^(2)` `sp^(3),sp^(2),sp` `sp,sp^(2),sp^(3)` `sp^(2),sp^(3),sp` ANSWER :B

Discussion

9.	The hybridisation of boron in ortho boric acid is
Answer» SP `sp^2` `sp^3` `sp^3 d` ANSWER :B

Discussion

10.	The hybridisation of boron and oxygen atoms in a molecule of boric acid are respectively
Answer» `sp^3 and sp^2` `sp^2 and sp^3` `sp^2 and sp^2` `sp^3 and sp^3` ANSWER :B

Discussion

11.	Calculate the hybridisation of BF_(3)
Answer» SOLUTION :`SP^(2)`

Discussion

12.	The hybridisation of atomic orbitals of nitrogen inNO_(2)^(+), NO_(3)^(-) and NH_(4)^(+) are
Answer» `sp , sp^(3) andsp^(2)` RESPECTIVELY `sp,sp^(2) and sp^(3)` respectivly `sp^(2), sp and sp^(3)`respectively `sp^(2), sp^(3) and sp^(3)` respectively. ANSWER :B

Discussion

13.	The hybridisation of Ag in the complex [Ag(NH_(3))_(2)]^(+) is
Answer» SP `sp^(2)` `sp^(3)` `DSP^(2)` ANSWER :A

Discussion

14.	The hybridisation of 1st and 2nd carbon atoms in propadiene respectively
Answer» `SP, sp^(2)` `sp^(2), sp` `sp^(2), sp^(2)` sp, sp Answer :B

Discussion

15.	The hybridisation in methane, ethene and Ethyne respectively is……
Answer» `SP^(3), sp^(2) and sp` `sp^(3), sp, sp^(2)` `sp^(2), sp^(3) and sp` `sp, sp^(2), sp^(3)` ANSWER :A

Discussion

16.	The hybrididsation of S in SO_(2)is
Answer» `SP` `sp^(2)` `sp^(3)` NONE of these ANSWER :d

Discussion

17.	The hybrid state of carbon, to which phenolic group is attached in phenol is
Answer» SP `sp^(2)` `sp^(3)` `DSP^(2)` SOLUTION :`sp^(2)`

Discussion

18.	The hybrid state of carbon in acetylene is the same as that of carbon in
Answer» Benzene Carbondioxide Graphite Ethylene ANSWER :B

Discussion

19.	The hybrid state of Carbon in Acetylene is same as that of …..
Answer» GRAPHITE `BeH_(2)` Benzene Diamond Answer :B

Discussion

20.	The hybrid state of 1 and 3 carbon atoms in CH_(2)=C=CH_(2)
Answer» `SP^(3)` `sp^(2)` `sp` `sp^(3)d` ANSWER :B

Discussion

21.	The hybrid orbitals with 33.33% s-character are involved in the bonding of one of the crystalline allotropes of carbon. The allotrope is
Answer» CARBON BLACK Graphite DIAMOND Gas carbon Answer :B

Discussion

22.	The hybrid orbitals have a bond angle ofk 109.5^(@). The percentage of p-character in the hybrid orbital in nearly
Answer» 0.25 0.33 0.5 0.75 Answer :D

Discussion

23.	The hybrid orbitals have bond angle of 109^(@)28. The ratio ot percentage of 's' and 'p' characters is
Answer» `1:1` `1:2` `1:3` `2:3` ANSWER :C

Discussion

24.	The human eye is sensitive to colour differences of indicator only when the ratio [In^(-) ] // [Hin] is greater then 10 (or)smaller than 0.1. What should be the minimum change in the pH of solution of observe a complete colour change . (pK_(In) =5).
Answer» `1.2` ` 1.4` ` 1` `2` SOLUTION :`pH " RANGE"=[PK_(I_n) -1, pK_(I_n) +1]` ` THEREFORE `change =2

Discussion

25.	The hottest region of Bunsen flame shown in the figure below is:
Answer» 2 1 4 3 Answer :A

Discussion

26.	The hottest region of Bunsen flame shown in the figure below is :
Answer» REGION 2 region 3 region 4 region 1 Solution :COMBUSTION is COMPLETE in this region

Discussion

27.	The hottest region of Bunsen flame showin in the figure below
Answer» Region2 Region3 Region4 Region1 Solution :

Discussion

28.	The horizontal bonds in Fischer projection respresents the bond in the three dimension for
Answer» Both below the plane of paper Both above the plane of paper Both on the plane of paper One above and another below the plane of paper Solution :In FISCHER projection the horizontal line represents GROUPS coming above the plane and VERTICAL line REPRESENT groups below plane.

Discussion

29.	The homologue of ethyne is
Answer» `C_(2)H_(4)` `C_(2)H_(6)` `C_(3)H_(2)` `C_(3)H_(4)` Answer :D

Discussion

30.	The HNH angle value is higher than HPH, HAsH and HSbH angles. Why ?
Answer» <P> Solution :In all the hydrides of group 15 elements, the CENTRAL atom is `sp^(3)`-hybridized. There of the four `sp^(3)`-orbitals FORM three E-H, `sigma-"bonds"` while the fourth CONTAINS the lone pair of electrons as shown below : Since the lone pair-bond pair repulsions are stronger than the bond pair-bond pair repulsions, therefore, in `NH_(3)` the bond angle decreases from `109^(@)-28` to `107.8^(@)`. As we move from N to P to As to Sb, the electronegativity of the central atom goes on decreasing. As a result, bond pairs of electrons, LIE electrons, lie away and away from the central atom. In other words, force of repulsion between the adjacent bond pairs goes on decreasing and consequently the bond angles keep on decreasing from `NH_(3)"to"SbH_(3)`. In other words, HNH bond angle is maximum `(107.8^(@))` followed by HPH `(93.6^(@))`, followed by HAsH`(91.3^(@))`.

Discussion

31.	The highly water soluble alkaline earth metal fluoride is
Answer» `CaF_(2)` `BaF_(2)` `MgF_(2)` `BeF_(2)` ANSWER :4

Discussion

32.	Thehighly metallicwill havethe configurationof
Answer» `2,8,7 ` 2,8,8,5 2,8,81 2,8,2 Solution :NA

Discussion

33.	The highly metallic element will have the configuration of....
Answer» `2, 8, 7` `2, 8 , 8, 5` `2, 8, 8, 1` `2, 8, 2` Answer :c

Discussion

34.	The highest yield of m product is possible by the electrophilic substitution of the following:
Answer» `C_6H_5CH_3` `C_6H_5CH_2COOC_2H_5` `C_6H_5CH(COOC_2H_5)_2` `C_6H_5C(COOC_2H_5)_3` SOLUTION :`C_6H_5C(COOC_2H_5)_3`

Discussion

35.	The highest temperature at which vapour pressure of any liquids can be measured is
Answer» CRITICAL temperature BOYLE's temperature Boiling POINT of the LIQUID KRAFT temperature Answer :C

Discussion

36.	The highest temperature at which vapour pressure of a liquid can be measured is :
Answer» CRITICAL temperature inversion temperature critical SOLU. Temperature b.pt of liquid Answer :D

Discussion

37.	What are the highest oxidation states shown by s-block elements ?
Answer» SOLUTION :GROUP NUMBER

Discussion

38.	The highest ionization energy is exhibited by………
Answer» Halogens Noble gases ALKALINE EARTH METALS Transition metals Solution :alkaline earth metals

Discussion

39.	The highest electron affinity is shown by
Answer» `O^(-)` `F^(-)` `Cl_(2)` `F_(2)` Solution :The molecuels of `F_(2)` and `Cl_(2)` and the anion F, All have stable NOBLE gas CONFIGURATION. Therefore, their EA is ALMOST ZERO. However,`O^(-)` has one ELECTRON less than the noble gas configuration, therefore, `O^(-)` has the highest EA.

Discussion

40.	Thehighestelectronaffinityis shownby
Answer» `O^(-)` `F^(-)` `C1_(2)` `F_(2)` SOLUTION :The MOLECULESOF `F_(2) ,C1_(2)`and theanion `F^(-)` , all havestablenoble gasconfiguration. Thereforetheir`Delta_(EG)H_(1) ` isalmostzero.However , `O^(-)` has oneelectronless thanthe noblegas configurationtherefore`O^(-)`has thehighest`Delta_(eg) H_(1)`.

Discussion

41.	The highest dipolemoment is of
Answer» `CF_4` `CH_3OH` `CO_2` `CH_3 F` ANSWER :B

Discussion

42.	The highest bond energy is for
Answer» `UNDERSET(SP)(C ) -H` `underset(sp^2)(C ) - H` `underset(sp^3)(C ) - H` all have EQUAL energy Answer :A

Discussion

43.	The highest boiling point is expected for…..
Answer» iso-octane n-octane 2, 2, 3, 3-tetramethyl butane n-butane Solution :More no. of C -ATOMS in linear structure WITHOUT branches

Discussion

44.	The higher density of water than that of ice is due to ..............
Answer» DIPOLE-dipole interaction dipole-induced dipole interaction HYDROGEN BONDING all of above Solution :hydrogen bonding

Discussion

45.	The high poisonous nature of CO is due to its
Answer» NEUTRAL nature Complex FORMING ability Reducing nature Oxidising nature Answer :B

Discussion

46.	The high density of water compared to ice is due to
Answer» HYDROGEN BONDING INTERACTIONS DIPOLE - dipole interactions Dipole - INDUCED dipole interactions Induced dipole - induced dipole interactions Answer :A

Discussion

47.	The high density of water as compared to ice isdue to ……
Answer» HYDROGEN BONDING interactions DIPOLE-dipole interactions Dipole-INDUCED dipole interactions Induced dipole induced dipole interactions Answer :A

Discussion

48.	The high boiling points of carboxylic acids are due to
Answer» their dimerisation their trimerisation their ABILITY to FORM inter-molecular H-bond Both A and C Solution :FACTUAL QUESTION

Discussion

49.	The heterolytic cleavage of C-H bonds results in the formation of __________
Answer» CARBANION CARBOCATION Hydri Hydronium Solution :N/A

Discussion

50.	The hetero elements in organic compound are nitrogen, halogen, sulphur and phosphorousd, Nitrogen is estimated by Duma's method (or) Kjeldahl's method. The other hetero elements are estimated using Carius method.The substance used in the estimation of phosphorous is
Answer» Conc. `H_(2)SO_(4)` fuming sulphuric ACID and `MgCl_(2)` Conc. `HNO_(3).NaOH` fuming nitric acid and magnesia mixture SOLUTION :Phosphorous is precipitated as `Mg_(2)P_(2)O_(7)` by heating the organic COMPOUND with fuming `HNO_(3)` and magnesia mixture.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The hybridisation of orbitals of N atom in NO_(3)^(-), NO_(2)^(+) and NH_(4)^(+) are respectively ……………………..

The hybridisation of carbons of C-C single bond of HC-=C-CH=CH_(2) is

The hybridisation of carbons in benzene is

The hybridisation of carbon in methyl cation is…..

The hybridisation of carbon in alkane serise is which type?

The hybridisation of carbon atoms in C-C single bond H-C equiv CH=CH_(2) is

The hybridisation of carbon atoms in C-C single bond H-C equiv C-CH_(3) is

The hybridisation of C in diamond, graphite and ethyne is in the order

The hybridisation of boron in ortho boric acid is

The hybridisation of boron and oxygen atoms in a molecule of boric acid are respectively

Calculate the hybridisation of BF_(3)

The hybridisation of atomic orbitals of nitrogen inNO_(2)^(+), NO_(3)^(-) and NH_(4)^(+) are

The hybridisation of Ag in the complex [Ag(NH_(3))_(2)]^(+) is

The hybridisation of 1st and 2nd carbon atoms in propadiene respectively

The hybridisation in methane, ethene and Ethyne respectively is……

The hybrididsation of S in SO_(2)is

The hybrid state of carbon, to which phenolic group is attached in phenol is

The hybrid state of carbon in acetylene is the same as that of carbon in

The hybrid state of Carbon in Acetylene is same as that of …..

The hybrid state of 1 and 3 carbon atoms in CH_(2)=C=CH_(2)

The hybrid orbitals with 33.33% s-character are involved in the bonding of one of the crystalline allotropes of carbon. The allotrope is

The hybrid orbitals have a bond angle ofk 109.5^(@). The percentage of p-character in the hybrid orbital in nearly

The hybrid orbitals have bond angle of 109^(@)28. The ratio ot percentage of 's' and 'p' characters is

The human eye is sensitive to colour differences of indicator only when the ratio [In^(-) ] // [Hin] is greater then 10 (or)smaller than 0.1. What should be the minimum change in the pH of solution of observe a complete colour change . (pK_(In) =5).

The hottest region of Bunsen flame shown in the figure below is:

The hottest region of Bunsen flame shown in the figure below is :

The hottest region of Bunsen flame showin in the figure below

The horizontal bonds in Fischer projection respresents the bond in the three dimension for

The homologue of ethyne is

The HNH angle value is higher than HPH, HAsH and HSbH angles. Why ?

The highly water soluble alkaline earth metal fluoride is

Thehighly metallicwill havethe configurationof

The highly metallic element will have the configuration of....

The highest yield of m product is possible by the electrophilic substitution of the following:

The highest temperature at which vapour pressure of any liquids can be measured is

The highest temperature at which vapour pressure of a liquid can be measured is :

What are the highest oxidation states shown by s-block elements ?

The highest ionization energy is exhibited by………

The highest electron affinity is shown by

Thehighestelectronaffinityis shownby

The highest dipolemoment is of

The highest bond energy is for

The highest boiling point is expected for…..

The higher density of water than that of ice is due to ..............

The high poisonous nature of CO is due to its

The high density of water compared to ice is due to

The high density of water as compared to ice isdue to ……

The high boiling points of carboxylic acids are due to

The heterolytic cleavage of C-H bonds results in the formation of __________

The hetero elements in organic compound are nitrogen, halogen, sulphur and phosphorousd, Nitrogen is estimated by Duma's method (or) Kjeldahl's method. The other hetero elements are estimated using Carius method.The substance used in the estimation of phosphorous is