94420 + Interview Questions in Chemistry in Class 12

1.	Histamine causes
Answer» ALLERGIC RESPONSE to pollen Secreation of ACID in stomach Nasal congestion All the above Answer :D

Discussion

2.	Hinsberg’s reagent is –
Answer» BENZENE SULPHONYL CHLORIDE Benzene sulphonic acid Phenyl isocyanide Benzene sulphonamide Solution :Benzene sulphonyl chloride

Discussion

3.	Hinsberg method to separate amines is based on the use of :
Answer» BENZENE sulphonylchloride Benzene sulphonic acid Ethyl oxalate Acetyl CHLORIDE ANSWER :A

Discussion

4.	Hinsberg reagent is
Answer» `C_6H_5SO_3H` `C_6H_5NO` `C_6H_5SO_2Cl` `C_6H_5N_2Cl` ANSWER :C

Discussion

5.	Hinsberg reagent distinguishes between _____ and _____.
Answer» SOLUTION :PRIMARY AMINE, SECONDARY amine

Discussion

6.	Hinsberg reagent can be used to distinguish between
Answer» PRIMARY and SECONDARY amine. primary and secondary alcohol. cyanide and isocyanide. aldehyde and ketone. Answer :A

Discussion

7.	Hinsberg’s reagent is:
Answer» `C_(6)H_(5)SO_(2)CI` `SOCI_(2)` `C_(6)H_(5)COCI` `(COCI)_(2)` SOLUTION :Hinsberg’s REAGENT is benzenesulphonylchloride

Discussion

8.	Highly toxic gas which causes headache, visual paralysis and even death is :
Answer» `CO_2` `O_3` CO All of these Answer :C

Discussion

9.	Highlyreactiveelementsoccur innature in…….State .
Answer» ANSWER :COMBINED

Discussion

10.	Highly pure dilute solution of sodium in liquid ammonia:
Answer» on EVAPORATION yield metals exhibits electrical conductivity produces sodium AMIDE and hydrogen GAS instantly acts as POWERFUL reducing agent Solution :`M+(x+y)NH_3 to [M (NH_3)_x]^(+) + [e (NH_3)_y]^(-)`.Blue colour of the solution is due to ammoniated electrons and good conductor of electricity because of both ammoniated cations and ammoniated electrons.

Discussion

11.	Highly electropositivemetalslike sodium,megnesium oraluminium areobtained by ……………….oftheir purified moltenores.
Answer» ANSWER :ELECTROLYSIS

Discussion

12.	Highly explosive xenon compound is :
Answer» `XeF_(6)` `XeO_(3)` `XeOF_(2)` `XeF_(4)` SOLUTION :`XeO_(3)` is HIGHLY explosive compound.

Discussion

13.	Highly electropositive metals can not he extracted by carbon reduction process because these
Answer» Metals combine with carbon to form carbides Metal oxides are REDUCED by carbon Metal oxides are not reduced by carbon Loss of metal is more by vaporisation Solution :HIGHLY BP metal compounds are not easily reduced by coke and the metal formed COMBINES with carbon FORMS metal carbides. And loss of metal is mroe by vapourisation

Discussion

14.	Highly electropositive metals can not be extracted by carbon reduction process because these :
Answer» METALS COMBINE with carbon to form carbides Metals do not REACT with carbon Metal OXIDES are not reduced by carbon Loss of metal is more by vaporisation Answer :A::D

Discussion

15.	Highly electropositive metal(s) can not be commercially extracted by carbon reduction process at high temperature because these :
Answer» matals COMBINE with carbon to form covalent CARBIDE metals combine with carbon to form ionic carbide `Delta G_(f)` of HIGHLY electropositive METAL oxide is having low negative value metal oxides are not reduced by carbon Answer :B

Discussion

16.	Highly conducting solutions favour rapid corrosion. Explain.
Answer» SOLUTION :CORROSION GENERALLY involes oxidation of metal. If metal is in CONTACT with high ionic concentrations, it favours oxidation. Atmospheric corrosion resulting from exposure of a metal to air generally contains water vapour, `H_(2)S, CO_(2), SO_(2)`, etc.These materials are responsible for electrochemical corrosion.

Discussion

17.	Highlight the role of Jawaharlal Nehru the first Prime Minister of India in the formation of India's foreign policy.
Answer» SOLUTION :i) Jawaharlal Nehru was the chief architect of the foreign policy of India as he held bothe the Prime MINISTER Office and the Foreign Ministry from 1947-----1964. ii) The three major objectives of Nehru's foreign policy were to preserve the SOVEREIGNTY of India, protect India's TERRITORIAL integrity and promote India's rapid economic development. He formed the FOUNDATION of the policy of non-alignment. Afro-Asian unity and the establishment of diplomatic relations with other countries after India's independence.

Discussion

18.	Highly conducting solution favour rapid corrosion. Explain.
Answer» Solution :Corrosion generally involves OXIDATION of metal. If metal is in contact with high ionic concentrations, it FAVOURS oxidation. Atmospheric corrosion resulting from exposure of a metal to air generally contains water vapour, `H_2S, CO_2, SO_2` ETC. These materials are RESPONSIBLE for ELECTROCHEMICAL corrosion.

Discussion

19.	Highlight two arenas of Cold War along with example of each.
Answer» Solution :Arena is an area where the cold war occurred. i) North Korea (supported by USSR) Vs SOUTH Korea (supported by USA) ii) Northern VIETNAM (supported by USSR) Vs Southern Vietnam (supported by USA)

Discussion

20.	Highest tendency for M^(+3) rarrM^(+2) is in
Answer» Mn Cr Fe All have same Answer :A

Discussion

21.	Highestvalue of pK_(b) will be for ___________.
Answer» `NH_3` `(CH_3)_2NH` `(CH_3)_3N` `CH_3NH_2` ANSWER :A

Discussion

22.	Highest pH value among the following is that of
Answer» GASTRIC juice Lemon juice Human BLOOD PEPSI cold Answer :C

Discussion

23.	Highest pH 14 is given by
Answer» `0.1 M H_(2)SO_(4)` `0.1 M NaOH` 1N NaOH 1N HCl Solution :1N NAOHSOLUTION have highest PH `[OH^(-)] = 1, pOH = 0, pH + pOH = 14` `pH = 14- 0 =14`

Discussion

24.	Highest oxidation state of manganesein fluoride is +4(MnF_(4)) but highest oxidation state in oxides is +7 ( Mn_(2)O_(7)) because "…................" .
Answer» ANSWER :d

Discussion

25.	Highest oxidation state of oxygen is
Answer» `+2` `+4` `+5` `+6` ANSWER :A

Discussion

26.	Highest oxidation state of manganese in fluorides is + 4 (MnF_4) but highest oxidation state in oxides is + 7 (Mn_(2)O_7) because
Answer» fluorine is more electronegative than oxygen fluorine does not possess d-orbitals fluorine stabilises lower OXIDATION state In covalent compounds, fluorine can form SINGLE bond only while oxygen FORMS DOUBLE bond Solution :In covalent compounds, fluorine can form single bond only while oxygen forms double bond

Discussion

27.	Highest oxidation state of manganese in fluorides is +4(MnF_4)but highest oxidation state in oxides is +7(Mn_2O_7) because
Answer» fluorine is more ELECTRONEGATIVE than oxygen fluorine does not POSSESS d-orbitals fluorine stabilises lower oxidation state In covalent compounds, fluorine can FORM single BOND only while oxygen forms double bond Solution :In covalent compounds, fluorine can form single bond only while oxygen forms double bond

Discussion

28.	Highest oxidation state of manganese in fluoride is (+4) (MnF_(4)) but highest oxidation state in oxides is (+7) (Mn_(2)O_(7))because……
Answer» Fluorine is more ELECTRONEGATIVE than oxygen Fluorine does not possess d-orbitals Fluorine stabilises lower oxidation state In COVALENT compounds fluorine can form single bond only while oxygen FORMS DOUBLE bond Solution :In covalent compounds fluorine can form single bond only while oxygen forms double bond

Discussion

29.	Highest oxidation state exhibited by as actinoid is
Answer» SOLUTION :CONCEPTUAL

Discussion

30.	Highest oxidation state exhibited by an actinide element in its compounds is
Answer» `+4` `+6` `+7` `+8` ANSWER :C

Discussion

31.	Highest oxidation number of iodine is in the compound:
Answer» `KIO_4` `IF_5` `KI_2` KI Answer :A

Discussion

32.	Highest ionising power is exhibited by
Answer» `alpha-`rays `BETA-`rays `gamma-`rays X-rays Solution :Highest ionising POWER is EXHIBITED by `alpha-`rays. This is 100 TIMES greater than `beta`-rays and 10,000 times greater than `gamma`-rays. This is due to HIGH kinetic energy

Discussion

33.	Highest melting point would be of
Answer» He CSCL `NH_(3)` `CHCl_(3)` SOLUTION :CsCl has IONIC bonding.

Discussion

34.	Highest group valency of halogens with respect to oxygen is
Answer» ONE FIVE six SEVEN Answer :C

Discussion

35.	Highest ionisation potential in a period stands for:
Answer» ALKALI metals Halogens Transition metals Noble gases Answer :D

Discussion

36.	Highest hydrogen bonding is possible in
Answer» `BiH_(3)` `AsH_(3)` `NH_(3)` `SbH_(3)` Answer :C

Discussion

37.	Highest entropy is in _____ .
Answer» hydrogen water graphite mercury Answer :A

Discussion

38.	Highest entropy is in
Answer» water hydrogen mercury graphite Solution : RANDOMNESS or DISORDER is maximum in gaseous PHASE.

Discussion

39.	Highest entropy at the same temperature is in:
Answer» Water Hydrogen Mercury Graphite Answer :B

Discussion

40.	Highest electron affinity observe in :-
Answer» `2S^(2)2P^(5)` `2s^(2)2p^(4)` `2s^(2)2p^(3)` `2s^(2)2p^(1)` ANSWER :A

Discussion

41.	Highest electronegativity among the following is for :
Answer» C Si Sn Pb Answer :A

Discussion

42.	Highest energy will be absorbed to eject out the electron in the configuration
Answer» `1s^(2)2s^(2)2p^(1)` 1s^(2)2s^(2)2p^(3)` `1s^(2)2s^(2)2p^(2)` `1s^(2)2s^(2)2p^(4)` SOLUTION :DUE to high STABILITY of half-filled orbitals.

Discussion

43.	Highest density is of ……..
Answer» It Os Pb Hg Answer :B

Discussion

44.	Highest covalent character is found in which of the following ?
Answer» `CaF_2` `CaCl_2` ` CaI_2` `CaBr_2 ` ANSWER :C

Discussion

45.	Highest covalent character is found i9n which following
Answer» `CaF_(2)` `CaCl _(2)` `Cal_(2)` `CaBr_(2)` ANSWER :C

Discussion

46.	The highest B.P.is expected for :
Answer» Iso-octane n-octane 2,2,3,3-tetramethylbutane n-butane Answer :B

Discussion

47.	Highest bond energy exists for:
Answer» `F_2` `Cl_2` `I_2` `Br_2` ANSWER :B

Discussion

48.	Highest bond dissociation energy stands for
Answer» HI HBr HCl HF Answer :D

Discussion

49.	Highest (+7) oxidation state is shown by
Answer» Co Cr V Mn Answer :D

Discussion

50.	Higher the_____or lower the ____of an acid, stronger is the acid.
Answer» SOLUTION :`K_(a),pK_(a)`.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Histamine causes

Hinsberg’s reagent is –

Hinsberg method to separate amines is based on the use of :

Hinsberg reagent is

Hinsberg reagent distinguishes between _____ and _____.

Hinsberg reagent can be used to distinguish between

Hinsberg’s reagent is:

Highly toxic gas which causes headache, visual paralysis and even death is :

Highlyreactiveelementsoccur innature in…….State .

Highly pure dilute solution of sodium in liquid ammonia:

Highly electropositivemetalslike sodium,megnesium oraluminium areobtained by ……………….oftheir purified moltenores.

Highly explosive xenon compound is :

Highly electropositive metals can not he extracted by carbon reduction process because these

Highly electropositive metals can not be extracted by carbon reduction process because these :

Highly electropositive metal(s) can not be commercially extracted by carbon reduction process at high temperature because these :

Highly conducting solutions favour rapid corrosion. Explain.

Highlight the role of Jawaharlal Nehru the first Prime Minister of India in the formation of India's foreign policy.

Highly conducting solution favour rapid corrosion. Explain.

Highlight two arenas of Cold War along with example of each.

Highest tendency for M^(+3) rarrM^(+2) is in

Highestvalue of pK_(b) will be for ___________.

Highest pH value among the following is that of

Highest pH 14 is given by

Highest oxidation state of manganesein fluoride is +4(MnF_(4)) but highest oxidation state in oxides is +7 ( Mn_(2)O_(7)) because "…................" .

Highest oxidation state of oxygen is

Highest oxidation state of manganese in fluorides is + 4 (MnF_4) but highest oxidation state in oxides is + 7 (Mn_(2)O_7) because

Highest oxidation state of manganese in fluorides is +4(MnF_4)but highest oxidation state in oxides is +7(Mn_2O_7) because

Highest oxidation state of manganese in fluoride is (+4) (MnF_(4)) but highest oxidation state in oxides is (+7) (Mn_(2)O_(7))because……

Highest oxidation state exhibited by as actinoid is

Highest oxidation state exhibited by an actinide element in its compounds is

Highest oxidation number of iodine is in the compound:

Highest ionising power is exhibited by

Highest melting point would be of

Highest group valency of halogens with respect to oxygen is

Highest ionisation potential in a period stands for:

Highest hydrogen bonding is possible in

Highest entropy is in _____ .

Highest entropy is in

Highest entropy at the same temperature is in:

Highest electron affinity observe in :-

Highest electronegativity among the following is for :

Highest energy will be absorbed to eject out the electron in the configuration

Highest density is of ……..

Highest covalent character is found in which of the following ?

Highest covalent character is found i9n which following

The highest B.P.is expected for :

Highest bond energy exists for:

Highest bond dissociation energy stands for

Highest (+7) oxidation state is shown by

Higher the_____or lower the ____of an acid, stronger is the acid.

Hinsberg reagent distinguishes between _ and _.

Higher the_or lower the of an acid, stronger is the acid.