94420 + Interview Questions in Chemistry in Class 12

1.	The chemical reaction occurring between covalent moleculse a involves
Answer» breaking of EXISTING bonds formations of new bonds evaluation of HEAT energy both `1` and `2` ANSWER :D

Discussion

2.	The chemical reaction given below : Cl_(2)(g)+SO_(2)(g) +2H_(2)O(l) rarr 2Cl^(-) (aq.) +3H^(+) (aq.)+ HSO_(4)^(-) (aq.) proceeds readily in aqueous acid solution. (i) Give the half-cell reactions. (ii) If a fully charged cell initially held 1 mole of Cl_(2) for how many days could it sustain a current of 0.05 ampere, assuming the cell becomes non0operative when 90% of initial Cl_(2) has been used up ?
Answer» ANSWER :40.2 DAYS

Discussion

3.	The chemical reaction Me_3C-Cl overset(H_2O)(rarr) Me_3C-OHis :
Answer» ADDITION SUBSTITUTION Both of these None Answer :B

Discussion

4.	The chemical reaction in which the yield of the product cannot be increased by the application of high pressure is:
Answer» `PCl_3 (G) + Cl_2 (g) ⇌PCl_5 (g)` `N_2 (g) + O_2 (g) ⇌2NO(g)` `H_2(g) + 3Cl_2 (g) ⇌ 2HCL(g) `2SO_2(g) + O_2(g) ⇌ 2SO_3(g)` ANSWER :B

Discussion

5.	The chemical reaction : BaO_(2(s))hArrBaO_((s))+1/2O_(2(g)),DeltaH=+ve. In equilibrium condition, pressure of O_(2) depends upon
Answer» Increase MASS of BAO Increase mass of `BaO_(2)` Increase in temperaturee Increase mass of `BaO_(2)` and BaO both ANSWER :C

Discussion

6.	The chemical reaction, 2O_3rarr3O_2 proceeds as follows: O_3iffO_2+.........(fast)O+O_3rarr2O_2.......(slow)The rate law expression should be :
Answer» `r=K[O_3]^2` `r=K[O_3]^2[O_2]^-1` `r=K[O_3][O_2]` Unpredictable' Answer :B

Discussion

7.	The chemical recation 2O_(3) to 3O_(2) proceeds as follows : O_(3)overset ("Fast")(to)O_(2)+O & O+O_(3) overset ("Slow")(to)2O_(2) the rate law expression should be
Answer» `r = K [O_3]^2` `r = K [O_3]^2 [O_2]^(-1)` `r = K [O_3][O_2]^2` `r = K [O_3][O_2]^2` ANSWER :B

Discussion

8.	The chemical reaction, 2O_(3) rarr 3O_(2) proceeds as follows Step1 : O_(3) hArr O_(2)+O""…(fast) Step 2: O + O_(3) rarr 2O_(2)""…(slow) The rate law expression should be
Answer» `r = K'[O_(3)][O_(2)]` `r = K'[O_(3)]^(2)[O_(2)]^(-1)` `r = K'[O_(3)]^(2)` unpredictable Solution :Acc.to slowest STEP `r = k[O][O_(3)]""`….(i) as `'O'` INTERMEDIATE its CONC. is calculated as `K = ([O_(2)][O])/([O_(3)]), ""[O] = (K[O_(3)])/([O_(2)])` Subtitute in(i) `r = (kK[O_(3)][O_(3)])/([O_(2)]) rArr r = K'[O_(3)]^(2)[O_(2)]^(-1)`

Discussion

9.	The chemical reaction, 2AgCl_((s))+H_(2(g))to2HCl_((aq))+2Ag_((s)) taking place in a galvanic cell is represented by the notation
Answer» `Pt\|H_(2(g)),1"bar"\|1M" "KCl_((AQ))//AgCl_((s))\|Ag_((s))` `Pt_((s))\|H_(2(g)),1"bar"\|1M" "HCl_((aq))\|\|1MAg_((aq))^(+)\|Ag_((s))` `Pt_((s))\|H_(2(g)),1"bar"\|1M" "HCl_((aq))\|AgCl_((s))\|Ag_((s))` `Pt_((s))\|H_(2(g)),1"bar"\|1M" "HCl_((aq))\|Ag_((s))\|AgCl_((s))` Solution :`2AgCl_((s))+H_(2(g))to2HCl_((aq))+2Ag_((s))` the activities of SOLIDS and liquid are takes as unity and at low CONCENTRATIONS, the ACTIVITY of a solute is approximated to its MOLARITY. The cell reaction will be `Pt_((s))\|H_(2(g)),1"bar"\|H_((aq))^(+)1M\|AgCl_((aq))1M\|Ag_((s))`.

Discussion

10.	The chemical reaction2AgCl_((s)) + H_(2(g)) to 2HCl_((aq)) + 2Ag_((s)) taking place in a galvanic cell is represented by the notation.
Answer» `Pt(s) \|H_2(G) , 1" BAR "\| 1 M KCl(aq)\| AGCL(s) \| AG(s)` `Pt(s) \| H_2(g) , 1 " bar" \| 1 M HCl (aq) \|\|1 M Ag^(+) (aq) \|Ag(s)` `Pt(s) \| H_2(g) , 1 " bar "\| 1 M HCl(aq) \|\|AgCl(s) \| Ag(s)` `Pt(s) \|H_2(g) , "1 bar "\| 1 M HCl(aq) \| Ag(s) \| AgCl(s)` Answer :C

Discussion

11.	The chemical reaction , 2 Ag Cl (s) rarr 2HCl(aq) + 2Ag(s) taking place in a galvanic cell is represented by the notation .
Answer» `Pt \|H_2(g), 1 "bar" \|1 M KCL(aq)\|AgCl (s) \|Ag(s)` `Pt(s) \|H_2(g), 1 "bar" \|1 "bar" \|a M HCl(aq) \|\| 1 Mag^+ (aq) Ag(s)` `Pt (s) +H_2(g).1 \|"bar" \|MHCl (aq) \|AgCl(s) \|Ag(s)` `Pt (s) +H_2(g).1 \|"bar" \|MHCl (aq) \|AgCl(s) \|Ag(s)` SOLUTION :` 2 AgCl(s) + H_2(g) rarr HCl (aq) + 2 Ag (s)` The activites of solids and liquids are TAKEN as unity and at low concentratios, the activity of a solute is APPROXIMATED to its molarity . The cell reaction will be `Pt (s) \| H_2 (g) , 1 "bar "\|H^+ (aq) 1M \| Ag Cl (aq) 1M \| Ag(s)`.

Discussion

12.	The chemical reacitivity of halogens is in the order
Answer» `F_(2) GT Cl_(2) gt Br_(2)`<BR>`F_(2) gt Br_(2) gt Cl_(2) gt I_(2)` `F_(2) gt Cl_(2) gt Br_(2) gt I_(2)` `F_(2) gt I_(2) gt Br_(2) gt Cl_(2)` SOLUTION :`F_(2) gt Cl_(2) gt Br_(2) gt I_(2)`

Discussion

13.	The chemical produced by bacteria, fungi is moulds which can inhibit the growth of other harmul microorganism is called
Answer» antimaalarial antibiotics antivial antiseptics Answer :B

Discussion

14.	The chemical process in the production of steel from haematite ore involves :
Answer» OXIDATION REDUCTION reduction FOLLOWEDBY oxidation oxidation FOLLOWED by reduction Answer :C

Discussion

15.	The chemical passengers produced in ductless glands are called :
Answer» LIPIDS CELLULAR MEMBRANE HORMONES antibodies. Answer :C

Discussion

16.	The chemical part of the dye that absorbs light and produces colour is called
Answer» Photochrome CHROMOPHORE Auxochrome PHOTOSENSITIZER SOLUTION :Chromophore is the part of the DYE molecule that absorbs light and produces colour.

Discussion

17.	The chemical oxidation of tertiary hydrogen in alkanes leads to the formation of:
Answer» Alcohol Aldehyde Ketone NONE of these Answer :A

Discussion

18.	Thechemical nameof vitamin B_(9)is ……… .
Answer» BIOTIN folic ACID NIACIN thaimain ANSWER :B

Discussion

19.	The chemical name of vitamin C is
Answer» ASCORBIC acis Folic acid Nicotinic acid Tartaric acid Solution :

Discussion

20.	The chemical name of vitamin B_(12) is…………………..
Answer» SOLUTION :CYANOCOBALAMIN

Discussion

21.	The chemical name of vitamin B_12 is .................
Answer» SOLUTION :CYANOCOBALAMIN

Discussion

22.	The chemical name of vitamin B_(1) is :
Answer» Ascorbic ACID RIBOFLAVIN THIAMINE PYRIDOXINE. Answer :C

Discussion

23.	The chemical name of melamine is:S
Answer» `2,4`-Diamino-`1,3,5`-triazine `2`-AMINO-`1,3,5`-triazine `2,4,6`-Triamino-`1,3,5`-Triazine `1,3,5`-Triamino-`2,4,6`-triazine Answer :C

Discussion

24.	Write the structure of isoprene and polyisoprene.
Answer» 2 - CHLORO - 1, 3 - butadiene 2 - METHYL - 1,3 - butadiene 2 - Methyl - 3 - chloro - 1- butane 2 - Methoxypropene. Answer :B

Discussion

25.	The chemical name of Horn silver is ____.
Answer» Chlorargyrite Silver glance Prousitite Pyrargyrite Solution :Chlorargyrite

Discussion

26.	The chemical name of bleaching powder is:
Answer» CALCIUM CHLORO hypochlorite Calcium hypochlorite Calcium chlorate Calcium prechlorate Answer :A

Discussion

27.	The chemical name of anisole is
Answer» Propanone Acetone Ethanoic acid Methoxy BENZENE Solution :The CHEMICAL STRUCTURE of ANISOLE is Chemical NAME of anisole is methoxy benzene.

Discussion

28.	The chemical messengrs transport message between a) Neuron to neuron b) Neuron to muscles c) Enzyme to receptor are d) Enzyme to enzyme Correct answers are
Answer» a only B only a and b a,b,C and d ANSWER :C

Discussion

29.	The chemical messengers transport message between
Answer» NEURON to neuron Neuron toto MUSCLES Enzyme to receptor are Enzyme to enzyme SOLUTION :Messages may TRANSFER between neuron to neuron , neutron to muscles , ENZYMES to receptor

Discussion

30.	The chemical messengers produced in ductless glands are
Answer» VITAMINS LIPIDS ANTIBOTICS Hormones Answer :D

Discussion

31.	The chemical messengers produced in ductless glands are :
Answer» Vitamins Lipids Antibiotics Hormones ANSWER :D

Discussion

32.	The chemical messenger produced in the endocrine (duct-less) glands are grouped as:
Answer» Polypeptides Hormones Bile salts Purines Answer :B

Discussion

33.	The chemical messangers produced in ductless glands are called :
Answer» LIPIDS CELLULAR MEMBRANE HORMONES antibodies. Answer :C

Discussion

34.	The chemical inertness of nitrogen is due to
Answer» half-FILLED '2p' ORBITALS of Nitrogen high BOND dissociation energy COMPLETELY filled d-orbitals its gaseous nature Answer :2

Discussion

35.	The chemical formula of Wilkinson's catalyst is :
Answer» <P> SOLUTION :`[(Ph_(3)P)_(3)RHCL]`

Discussion

36.	The chemical formula of wallemite is
Answer» ZnO `ZnCO_(3)` `ZN_(2)SiO_(4)` ZnS Answer :C

Discussion

37.	The chemical formula of Zeigler-Natta catalyst is
Answer» `CuCl_(2)` `NiCl_(2)` `CrCl_(3)` `TiCl_(4)` Answer :D

Discussion

38.	The chemical formula of tear gas is
Answer» `COCl_(2)` `CO_(2)` `Cl_(2)` `C Cl_(2)NO_(2)` ANSWER :D

Discussion

39.	The chemical formula of 'tear gas ' is
Answer» `CoCl_(2)` `CO_(2)` `Cl_(2)` `C Cl_(3)NO_(2)` Solution :Chloropicrin is also knonw as tear gas. It is obtained by the reaction of chloroform with NITRIC ACID. `CHCl_(3) +HNO_(3)to UNDERSET("(tear gas)")underset("chloropicrin")(C Cl_(3)NO_(2))+H_(2)O`

Discussion

40.	The chemical formula of phosgene or carbonyl chloride is :
Answer» `PH_3` `COCl_2` `POCl_3` `PCl_3` ANSWER :B

Discussion

41.	The chemical formula of copper pyrite is:CuFeS2,Cu2S,Cu2O,CuCO3.Cu(OH)2
Answer» `CuFeS_` `Cu_2S` `Cu_2O` `CuCO_3.Cu(OH)_2` ANSWER :A

Discussion

42.	The chemical formula of azurite is:
Answer» `2CuCO_3*CU(OH)_2` `CuSO_4.3Cu(OH)_2` `CuCO_3.Cu(OH)_2` `CuFeS_2` ANSWER :A

Discussion

43.	The chemical formula for tartar emetic is:
Answer» ANSWER :D

Discussion

44.	The chemical extracted from the plant Rauwalfia serpentina is
Answer» reserphine QUININE ASPIRIN paracetmal Solution :RESERPINE is rawolfia ALKALOID

Discussion

45.	The chemical equilibrium of a reversible reaction is not influenced by
Answer» pressure catalyst concentration of the reactants temperature Solution :The value of equilibrium CONSTANT is independent of the following factors: (i) initial concentration of the reactants involved (ii) presence of a catalyst (iii) DIRECTION from which the equilibrium has been attained (iv) presence of INERT MATERIALS.

Discussion

46.	The chemical elements are arranged in the order of increasing electronegativities in the sequence
Answer» P, Si, Se, Br, N Si, Se, P, Br, N Si, P, Se, Br, N Se, P, Si, Br, N Solution :Electronegativity increases as we move from left to right in a period so phosphours is more ELECTRONEGATIVE than silicon and bromine is more electronegative than selenium and electronegativity decreases as we descend the group. `therefore` Nitrogen is the most electronegative ELEMENT of the given elements. `therefore` The OBSERVED ORDER is Si, P, Se, Br, N.

Discussion

47.	The chemical compounds used to remove dirt or oily materials from surface are called .....
Answer» CLEANSING AGENTS hydrophobic hydrophilic strong BASE SOLUTION :cleansing agents

Discussion

48.	The chemical compounds released by one species of animals in order to influence the behaviour of the other members of the same species are called
Answer» Pheromones Nucleic ACID Hormones Steroids Answer :A

Discussion

49.	The chemical composition of slag formed during the smelting process in the extraction of copper is :-
Answer» `Cu_(2)O+FeS` `FeSiO_(3)` `CuFeS_(2)` `Cu_(2)S+FeO` ANSWER :B

Discussion

50.	The chemical composition of slag formed during the smelting process in the extraction of copper is :
Answer» `Cu_2O+ FES` `FeSiO_3` `CuFeS_2` `Cu_2S+FeO` ANSWER :B

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The chemical reaction occurring between covalent moleculse a involves

The chemical reaction Me_3C-Cl overset(H_2O)(rarr) Me_3C-OHis :

The chemical reaction in which the yield of the product cannot be increased by the application of high pressure is:

The chemical reaction : BaO_(2(s))hArrBaO_((s))+1/2O_(2(g)),DeltaH=+ve. In equilibrium condition, pressure of O_(2) depends upon

The chemical reaction, 2O_3rarr3O_2 proceeds as follows: O_3iffO_2+.........(fast)O+O_3rarr2O_2.......(slow)The rate law expression should be :

The chemical recation 2O_(3) to 3O_(2) proceeds as follows : O_(3)overset ("Fast")(to)O_(2)+O & O+O_(3) overset ("Slow")(to)2O_(2) the rate law expression should be

The chemical reaction, 2O_(3) rarr 3O_(2) proceeds as follows Step1 : O_(3) hArr O_(2)+O""…(fast) Step 2: O + O_(3) rarr 2O_(2)""…(slow) The rate law expression should be

The chemical reaction, 2AgCl_((s))+H_(2(g))to2HCl_((aq))+2Ag_((s)) taking place in a galvanic cell is represented by the notation

The chemical reaction2AgCl_((s)) + H_(2(g)) to 2HCl_((aq)) + 2Ag_((s)) taking place in a galvanic cell is represented by the notation.

The chemical reaction , 2 Ag Cl (s) rarr 2HCl(aq) + 2Ag(s) taking place in a galvanic cell is represented by the notation .

The chemical reacitivity of halogens is in the order

The chemical produced by bacteria, fungi is moulds which can inhibit the growth of other harmul microorganism is called

The chemical process in the production of steel from haematite ore involves :

The chemical passengers produced in ductless glands are called :

The chemical part of the dye that absorbs light and produces colour is called

The chemical oxidation of tertiary hydrogen in alkanes leads to the formation of:

Thechemical nameof vitamin B_(9)is ……… .

The chemical name of vitamin C is

The chemical name of vitamin B_(12) is…………………..

The chemical name of vitamin B_12 is .................

The chemical name of vitamin B_(1) is :

The chemical name of melamine is:S

Write the structure of isoprene and polyisoprene.

The chemical name of Horn silver is ____.

The chemical name of bleaching powder is:

The chemical name of anisole is

The chemical messengrs transport message between a) Neuron to neuron b) Neuron to muscles c) Enzyme to receptor are d) Enzyme to enzyme Correct answers are

The chemical messengers transport message between

The chemical messengers produced in ductless glands are

The chemical messengers produced in ductless glands are :

The chemical messenger produced in the endocrine (duct-less) glands are grouped as:

The chemical messangers produced in ductless glands are called :

The chemical inertness of nitrogen is due to

The chemical formula of Wilkinson's catalyst is :

The chemical formula of wallemite is

The chemical formula of Zeigler-Natta catalyst is

The chemical formula of tear gas is

The chemical formula of 'tear gas ' is

The chemical formula of phosgene or carbonyl chloride is :

The chemical formula of copper pyrite is:CuFeS2,Cu2S,Cu2O,CuCO3.Cu(OH)2

The chemical formula of azurite is:

The chemical formula for tartar emetic is:

The chemical extracted from the plant Rauwalfia serpentina is

The chemical equilibrium of a reversible reaction is not influenced by

The chemical elements are arranged in the order of increasing electronegativities in the sequence

The chemical compounds used to remove dirt or oily materials from surface are called .....

The chemical compounds released by one species of animals in order to influence the behaviour of the other members of the same species are called

The chemical composition of slag formed during the smelting process in the extraction of copper is :-

The chemical composition of slag formed during the smelting process in the extraction of copper is :