94420 + Interview Questions in Chemistry in Class 12

1.	Which noble gas in most abundant in atmospheric dry air?
Answer» SOLUTION :ARGON (`0.956%` by VOLUME).

Discussion

2.	Name the monosaccharide units in maltose.
Answer» SOLUTION :TWO `ALPHA`-D-glucose UNITS.

Discussion

3.	Name the monomers usedl in the manufacture of Nylon-6, 6.
Answer» Solution :The monomers used in the MANUFACTURE of NYLON - 6, 6 are hexamethylenediamine and ADIPIC ACID.

Discussion

4.	Name the monomers used for getting following polymers: i) PVC ii) Bakelite iii) Polystyrene
Answer» Solution :PVC -Vinyl CHLORIDE BAKELITE -Phenol and FORMALDEHYDE Polystyrene -Styrene

Discussion

5.	Name the monomers used in Nylon-66.
Answer» SOLUTION :These are ADIPIC ACID and HEXAMETHYLENEDIAMINE.

Discussion

6.	Name the monomers present in the following polymers. Nylon-6
Answer» SOLUTION :Çaprolactum

Discussion

7.	Name the monomers present in the following polymers. Neoprene
Answer» SOLUTION :CHLOROPRENE

Discussion

8.	Namethe monomers ofnylon 2 or nylon 6 polymer.
Answer» Solution :Monomer of nylon 2: Glycin, `H_(2)N - CH_(2) - COOH`. Monomer of nylon 6 : AMINO caproic acid, `H_(2)N(CH_(2))_(5)COOH`.

Discussion

9.	Name the monomers in the following two polymers Buna-N
Answer» SOLUTION :MONOMERS are 1, 3- BUTADIENE and acrylonitrite

Discussion

10.	Name the monomers of nylon-2 or nylon-6.
Answer» SOLUTION :Nylon-2 : GLYCINE or 2-aminoethanoic ACID, `H_2N - CH_2 COOH` Nylon-6: CAPROLACTAM or 2-Azacycloheptanone,

Discussion

11.	Write the names of the monomers of the following polymers
Answer» Solution :Nylon 6, 6 : MONOMERS are hexa -methylene DIAMINE and ADIPIC acid

Discussion

12.	Name the monomer used in the preparation of Teflon.
Answer» SOLUTION :TETRAFLUOROETHENE

Discussion

13.	Name the monomer present in natural rubber.
Answer» Solution :MONOMER of NATURAL rubber is isoprene or 2 - methyl - 1, 3 - butadiene

Discussion

14.	Name the monomer present in following polymer. i) Nylon - 6 ii) Natural rubber iii) Neoprene.
Answer» Solution :i. CAPROLACTUM II. Cis - isoprene III. Chloroprene

Discussion

15.	Name the monomer present in following polymer:(i) Nylon-6(ii) Natural rubber (iii) Neoprene
Answer» Solution :(i) CAPROLACTAM(II) ISOPRENE - (2-Methyl-1-3 BUTADIENE)(III) Chloroprene-(2-chloro-1-3-butadiene)

Discussion

16.	Name the method used to determine the nature of charge on colloidal particles.
Answer» SOLUTION :ELECTROPHORESIS.

Discussion

17.	Name the method used for the refining of Zr.
Answer» SOLUTION :ZIRCONIUM is REFINED by VAN Arkel METHOD.

Discussion

18.	Name the method used for the refining of Nickel metal.
Answer» SOLUTION :NICKEL is REFINED by Mond.s PROCESS.

Discussion

19.	Name the method used for the refining of (i) Nickel (ii) Zirconium
Answer» SOLUTION :(i) Mond.s PROCESS (II) VAN Arkel.s METHOD

Discussion

20.	Name the method used for removing gangue from sulphide ores.
Answer» SOLUTION :Froth floatation method is used for removing GANGUE from the sulphide ores.

Discussion

21.	Namethemethodused forrefiningof(i) coppermetal (ii) nickelmetal.
Answer» SOLUTION :(i) Electrolyticmethodisusedforrefiningofcopper. (II) Mond'smethodisusedforrefiningof NICKEL.

Discussion

22.	Namethemethodusedforremovingganguefrom sulphideores.
Answer» SOLUTION :FROTHFLOATATION.

Discussion

23.	Name the method used for refining of : (a). Zirconium. (b). Nickel.
Answer» Solution :(a). VAN Arkel METHOD (B). MOND's PROCESS

Discussion

24.	Name the method used for refining of zirconium.
Answer» SOLUTION :VAN Arkel METHOD.

Discussion

25.	Name the method used for isolation of noble gas mixture from air.
Answer» SOLUTION :Rasmay and RAYLEIGH METHOD.

Discussion

26.	Name the method of refining to obtain silicon of high purity.
Answer» Solution :ZONE refining is used to obtain SILICON of high PURITY.

Discussion

27.	Name the method to deduce the charge of the sol particle. Explain it with a neat diagram.
Answer» Solution : Electrophoresis : (i) When electric potential is applied across two platinum electrodes dipped in a hydrophilic sol, the dispersed particles MOVE TOWARD one or other electrode. (II) This migration of sol particles under the INFLUENCE of electric field is CALLED electrophoresis or cataphoresis. (iii) If the sol particles migrate to the cathode, then they posses positive (+) charges, and if the sol particles migrate to the anode then they have negative charges(-). (iv) Thus from the direction of migration of sol particles we can determine the charge of the sol particles. (v) Hence electrophoresis is used for detection of presence of charges on the sol particles.

Discussion

28.	Name the method used for concentration of sulphide ores.
Answer» SOLUTION :FORTH FLOATATION PROCESS.

Discussion

29.	Name the method of refining of silicon.
Answer» SOLUTION :ZONE REFINING.

Discussion

30.	Name the method of refining of nickel.
Answer» SOLUTION :Nickel is refined by Mond.s process `NI+4CO to Ni(CO)_(4)`.

Discussion

31.	Namethemethodof refiningof nickel.
Answer» Solution :MOND's method is usedto refinenickel. In thismethod,impurenickelis heatedin a current of COat330 -350 K whenitforms volatilenickeltetracarbonylcomplex leaving behindimpurities. Thenickeitetracarbonylcomplex thusobtainedis then heatedto ahighertemperature( 450- 470 K ) whenitundergoesthermaldecomposationgivingpurenickei. `underset ("Impure NICKEL")(Ni (s)) +4 CO(G) overset ( 330 -350 K )tounderset ( " Nickel tetracarbonyl")(Ni(CO)_4(g))overset ( 450-470K) tounderset ("Pure nickel")(Ni(s)) +4 CO (g) `

Discussion

32.	Name the method of refining of metals such as Germanium.
Answer» SOLUTION :ZONE refining is USED for the purification of METALS like germanium.

Discussion

33.	Name the method for determining the osmotic pressure of a solution.
Answer» Solution :Berkley and Hartley.s METHOD is USED to determine the OSMOTIC PRESSURE of the solution.

Discussion

34.	Name the method applied for the concentration of Bauxite ore in the extraction of Aluminium.
Answer» SOLUTION :By LEACHING with a solution of SODIUM HYDROXIDE.

Discussion

35.	Name the metals that are obtained from their oxides using hydrogen as reducing agent.
Answer» SOLUTION :IRON, LEAD and COPPER.

Discussion

36.	Name the metallurgical process used where the ore is heated in a regular supply of air in a furnace at a temperature below the melting point of the metal.
Answer» SOLUTION :ROASTING.

Discussion

37.	Name the metal with tripositive charge represented by the following electronic configuration : 1s^(2)2s^(2)2p^(6)3s(2)3p^(6)3d^(3).
Answer» SOLUTION :`CR^(3+)` is represented by the CONFIGURATION : `1S^(2)2s^(2)2p^(6)3s^(2)3P^(6)3d^(3)`.

Discussion

38.	Name the metal with tripositive ion represented by the configuration : 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5
Answer» Solution :`Cr^(3+)` is the ion represented by the configuration `1s^(2) 2S^(2) 2P^(6) 3S^(2) 3p^(6) 3d^(3)`.

Discussion

39.	Name the metal that is purified by placing the impure metal on sloping hearth of a reverberatory furnace and heating that above its melting point in absence of air.
Answer» Mercury <BR>Galium Zirconium Copper Solution :It is a liquationprocess. Ex. Metals LIKE Br, Sn, Pb and Hg are separated form their crude form by liquation.

Discussion

40.	Name the metal present in:(i) Chlorophyll (ii) Haemoglobin (iii) Vit. B-12 (iv) cis platin
Answer» Solution :(i)MG (II) FE (iii)CO (iv) (Pt)

Discussion

41.	Name the metal used as a reducing agent in aluminothermie process.
Answer» SOLUTION :ALUMINIUM

Discussion

42.	Which metal is refined by Van-Arkel method?
Answer» SOLUTION :ZIRCONIUM or ZR (or) TITANIUM OR TI.

Discussion

43.	Name the metal present in (a) chlorophyll (b) haemoglobin.
Answer» SOLUTION :(a) MG, (B) FE.

Discussion

44.	Name the metal M which is extracted on the basis of following reactions: 4M+8NaCN+2H_(2)O+O_(2)to 4NaM(CN)_(2)+4NaOH 2NaM(CN)_(2)+ZntoNa_(2)Zn(CN)_(4)+2M
Answer» AU or Ag Hg Ni Fe Answer :1

Discussion

45.	Name the metal of the 1^(st) row transition series that has maximum no. of unpaired electrons in its ground state.
Answer» SOLUTION :CHROMIUM

Discussion

46.	Name the metal of the 1^(st) row transition series that (i) has maximum number of unpaired electrons in its ground state. (ii) has zero spin only magnetic moment in its + 2 oxidation state. (iii) exhibits maximum number of oxidation states.
Answer» Solution :(i) Chromium or Cr (II) Zinc or Zn (III) MANGANESE or Mn

Discussion

47.	Name the metal of the 1^(st) row transition series that Exhibits maximum number of oxidation states.
Answer» SOLUTION :MANGANESE

Discussion

48.	Name the metal M which is extracted on the basis of following reactions 4M+8CN^(-)+2H_2O+O_2to4[M(CN)_2]^(-)+4OH^-2[M(CN)_2]^(-)+Znto[Zn(CN)_4]^(2-)+2M:
Answer» Nickel Silver Copper Mercury Answer :B

Discussion

49.	Name the metal M, which is extracted based on the following equation 4M+8CN+2H_(2)O+O_(2) to4[M(CN)_(2)]+4OH: 2[M(CN_(2))]^(-)+Zn to [Zn (CN)_(4)]^(2)+2M
Answer» CUPELLATION AU (or) Ag Hg Ni Answer :B

Discussion

50.	Name the method by which Na, K, Mg and Al Can be extracted.
Answer» SOLUTION :ELECTROLYTIC REDUCTION.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which noble gas in most abundant in atmospheric dry air?

Name the monosaccharide units in maltose.

Name the monomers usedl in the manufacture of Nylon-6, 6.

Name the monomers used for getting following polymers: i) PVC ii) Bakelite iii) Polystyrene

Name the monomers used in Nylon-66.

Name the monomers present in the following polymers. Nylon-6

Name the monomers present in the following polymers. Neoprene

Namethe monomers ofnylon 2 or nylon 6 polymer.

Name the monomers in the following two polymers Buna-N

Name the monomers of nylon-2 or nylon-6.

Write the names of the monomers of the following polymers

Name the monomer used in the preparation of Teflon.

Name the monomer present in natural rubber.

Name the monomer present in following polymer. i) Nylon - 6 ii) Natural rubber iii) Neoprene.

Name the monomer present in following polymer:(i) Nylon-6(ii) Natural rubber (iii) Neoprene

Name the method used to determine the nature of charge on colloidal particles.

Name the method used for the refining of Zr.

Name the method used for the refining of Nickel metal.

Name the method used for the refining of (i) Nickel (ii) Zirconium

Name the method used for removing gangue from sulphide ores.

Namethemethodused forrefiningof(i) coppermetal (ii) nickelmetal.

Namethemethodusedforremovingganguefrom sulphideores.

Name the method used for refining of : (a). Zirconium. (b). Nickel.

Name the method used for refining of zirconium.

Name the method used for isolation of noble gas mixture from air.

Name the method of refining to obtain silicon of high purity.

Name the method to deduce the charge of the sol particle. Explain it with a neat diagram.

Name the method used for concentration of sulphide ores.

Name the method of refining of silicon.

Name the method of refining of nickel.

Namethemethodof refiningof nickel.

Name the method of refining of metals such as Germanium.

Name the method for determining the osmotic pressure of a solution.

Name the method applied for the concentration of Bauxite ore in the extraction of Aluminium.

Name the metals that are obtained from their oxides using hydrogen as reducing agent.

Name the metallurgical process used where the ore is heated in a regular supply of air in a furnace at a temperature below the melting point of the metal.

Name the metal with tripositive charge represented by the following electronic configuration : 1s^(2)2s^(2)2p^(6)3s(2)3p^(6)3d^(3).

Name the metal with tripositive ion represented by the configuration : 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5

Name the metal that is purified by placing the impure metal on sloping hearth of a reverberatory furnace and heating that above its melting point in absence of air.

Name the metal present in:(i) Chlorophyll (ii) Haemoglobin (iii) Vit. B-12 (iv) cis platin

Name the metal used as a reducing agent in aluminothermie process.

Which metal is refined by Van-Arkel method?

Name the metal present in (a) chlorophyll (b) haemoglobin.

Name the metal M which is extracted on the basis of following reactions: 4M+8NaCN+2H_(2)O+O_(2)to 4NaM(CN)_(2)+4NaOH 2NaM(CN)_(2)+ZntoNa_(2)Zn(CN)_(4)+2M

Name the metal of the 1^(st) row transition series that has maximum no. of unpaired electrons in its ground state.

Name the metal of the 1^(st) row transition series that (i) has maximum number of unpaired electrons in its ground state. (ii) has zero spin only magnetic moment in its + 2 oxidation state. (iii) exhibits maximum number of oxidation states.

Name the metal of the 1^(st) row transition series that Exhibits maximum number of oxidation states.

Name the metal M which is extracted on the basis of following reactions 4M+8CN^(-)+2H_2O+O_2to4[M(CN)_2]^(-)+4OH^-2[M(CN)_2]^(-)+Znto[Zn(CN)_4]^(2-)+2M:

Name the metal M, which is extracted based on the following equation 4M+8CN+2H_(2)O+O_(2) to4[M(CN)_(2)]+4OH: 2[M(CN_(2))]^(-)+Zn to [Zn (CN)_(4)]^(2)+2M

Name the method by which Na, K, Mg and Al Can be extracted.