Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.	Give the uses of Krypton?
Answer» SOLUTION :(i) Krypton is USED in fluorescent bulbs, flash bulbs etc….. (II) Lamps filed with krypton are used in AIRPORTS as approaching lights as they can penetrate through dense fog.

2.	Glycerol has strong intermolecular bonding therefore it is
Answer» SWEET Reactive Explosive Viscous SOLUTION :Glycerol has a three OH GROUP hence it is viscous in NATURE.

3.	Give the uses of mercury button cell.
Answer» Solution :It has HIGHER capacity and LONGER life. Used in pacemakers, ELECTRONIC watches, CAMERAS etc.

4.	Glycerol has
Answer» 2 primary alcoholic group and 1 SECONDARY alcoholic group 3 secondary alcoholic groups 3 primary alcoholic groups 1 primary alcoholic group and 2 secondary alcoholic group Answer :A

5.	Give the uses of helium.
Answer» Solution :1. Helium and oxygen mixture is used by divers in place of AIR oxygen mixture. This PREVENTS the painful dangerous condition called bends. 2. Helium is used to provide inert atmosphere is electric ARC welding of metals 3. Helium has lowest boiling point hence used in cryogenics (log temperature science). 4. It is MUCH LESS denser than air the hence used for filling air balloons

6.	Give the uses of cellulose.
Answer» Solution :CELLULOSE is used extensively in manufacturing PAPER, cellulose FIBRES and rayon explosive.

7.	Glycerol has :
Answer» 3 primary ALCOHOLIC groups 3 secondary alcoholic groups 1 primary alcoholic GROUP and 2 secondary alcohlic groups 2 primary alcoholic groups and 1 secondary alcoholic group Answer :D

8.	Give the uses of Freon-12, DDT and iodoform.
Answer» Solution :Uses of: (i) Freon-12 : (a) Cooling agent for refrigerators and air conditioners. (b) propellants for aerosols. (ii) DDT: It is used as a powerful insecticide. (III) Iodoform : (a) As an antiseptic. (b) The FORMATION of iodoform is used as a test for compounds containing groups. `CH_(3)-UNDERSET(OH)underset(\|)CH-` or `CH_(3)-underset(O)underset(\|\|)C-`

9.	Glycerol does not contain the alcoholic group
Answer» `1^(@)` `2^(@)` `3^(@)` none Answer :C

10.	Give the uses of chlorine.
Answer» Solution :1. Purification of drinking water 2. BLEACHING of cotton textiles, PAPER and rayon . 3. It is used in extraction of GOLD and platinum

11.	Glycol condenses with ketones to give:
Answer» CYCLIC ketal Cyclic detals Acetaldehyde OXALIC acid Answer :B

12.	Give the uses of carbohydrates.
Answer» Solution :Importance of carbohydrates : (i) Carbohydrates, widely distributed in plants and animals, ACTS mainly as energy sources and structural POLYMERS. (ii) Carbohydrate is STORED in the body as glycogen and in plant as starch. (iii) Carbohydrates such as cellulose which is the primary components of plant cell wall, is used to make paper, furniture (wood) and cloths (cotton) (iv) Simple sugar glucose serves as an instant source of energy. ( v) Ribose sugars are one of the components of nucleic acids. (vi) Modified carbohydrates such as hyaluronate (GLYCOSAMINOGLYCANS) act as shock absorber and LUBRICANT.

13.	Give the uses of carbon dioxide.
Answer» Solution :(i) Carbon dioxide is used to PRODUCE an inert atomosphere for CHEMICAL processing. (ii) Biologically, it is important for photosynthesis. (III) It is also used as fire EXTINGUISHER and as a propellentgas. (iv) It is used in the PRODUCTION of carbonated beverages and in the production of foam.

14.	Glycerol catches fire on mixing with :
Answer» `KMnO_4` `K_2Cr_2O_7` `HNO_3` None Answer :A

15.	Give the uses of boron.
Answer» ANSWER :

16.	Give the uses of Borax. Uses of borax:
Answer» Solution :(i) Borax is used for the identification of coloured metal ions. (II) In the manufacture OPTICAL and borosilicate GLASS, enamels and glazes for pottery. (iii) It is also used as a FLUX in metallurgy and also as a GOOD preservative.

17.	Glycerol can be obtained by reacting NaOH with
Answer» FATS Alcohol Petroleum Soap Answer :A

18.	Give the uses of argon.
Answer» SOLUTION :Argon prevents the oxidation of hot filament and prolongs the LIFE in filament BULBS.

19.	Glycerol boils at 290^@C with slight decomposition. Which of the following method is used to purify impure glycerine?
Answer» Steam distillation Simple distillation VACCUM distillation EXTRACTION with a solvent Answer :C

20.	Glycerol boils at 290^(@) C slight decomposition Impure glycerine can be purifiedby
Answer» Steam DISTILLATION Simple distillation Vacuum distillation Extraction with a solvent Solution :The liquids which decompose at its BOILING point can be purified by vacuum distillation . Glycerol which decomposes at its boilingpoint(-563K) can be distilled without DECOMPOSITION at 453 K under 12 mm Hg pressure.

21.	Give the uses of Borax.
Answer» Solution :(i) Borax is used for the IDENTIFICATION of coloured METAL ions. (ii) In the manufacture optical and borosilicate GLASS, enamels and glazes for pottery. (iii) It is also used as a flux in metallurgy and also ACTS as a good preservative.

22.	Glycerol as a triester is present in
Answer» Petroleum Kerosene Vegetable oiland fat Naphtha Answer :C

23.	Give the uses of aluminium chloride.
Answer» Solution :(i) ANHYDROUS aluminium chloride is used as a CATALYST in Friedels Crafts reactions. (ii) It is used for the manufacture of PETROL by cracking the mineral oils. (iii) It is used as a catalyst in the manufacture on DYES, drugs and PERFUMES.

24.	Glycerol an oxidation with ______ gives glyceric acid and tartronic acid
Answer» DIL `HNO_(3)` Conc. `HNO_(3)` BISMUTH nitrate Fenton's REAGENT Answer :A

25.	Give 3 uses of aluminium chloride.
Answer» Solution :Uses of ALUMINIUM CHLORIDE: `` Anhydrous aluminium chloride is used as a catalyst in FRIEDELS Crafts REACTIONS. `` It is used for the manufacture of petrol by CRACKING the mineral oils. `**` It is used as a catalyst in the manufacture on dyes, drugs and perfumes.

26.	Glycerol as a triester present in:
Answer» Petroleum Kerosence Vegetable OIL & fat Naphtha Answer :C

27.	Give the unit for molal boiling point elevation constant and molal freezing point depression constant.
Answer» Solution :For both molal boiling POINT ELEVATION constant `(K_(B))` and molal freezing point depression constant `(K_(F))` unit is same, i.e., K KG `mol^(-1)`.

28.	Give the two isomers ofCo_2 (Co)_5*)
Answer» SOLUTION :

29.	Glycerine is a :
Answer» SECONDARY alcohol Tertiary alcohol Trihydric alcohol Ester Answer :C

30.	Give the type and examples of electrodes.
Answer» Solution :(a) On the BASIS of reaction occurs on the surface of electrode: In a galvanic cell, the half-cell in which oxidation takes place is called anode and the other half-cell in which reduction TAKS place is called cathode. (b) On the basis of electric charge on electrode: Positive and negative electrode: More number of electrons are present in negative electrode with respect to positive electrode. E.g., in galvanic cell anode is negative and cathode is positive. (c) Classification based on nature of electrodes: (i) Active electrode : In cell, electrode which shows either increased or decrease in its weight is called active electrode. if active metal during the reaction get dissolved in the solution, in such cases its weight is reduced. and if during the reaction the ions of solution experience the reduction reaction and get reduced and convert into metal particle which should be deposited on the electrode, in such circumstances the weight of metal increases and they are taking part in the reaction. for e.g., Zn and Cu metals are active electrode in Daniell cell. `Zn to Zn^(2+)+2e^(-)` (Oxidation) and `Cu_((aq))^(2+) +2e^(-)toCu_((S))` (Reduction) Here, weight of Zn DECREASES and weight of Cu get increases. (ii) Inert electrode: The electrode in the cell reaction provide only its surface, but do not take part in the reaction, such electrode is TERMED as inert electrode. E.g., metal line platinum, graphite ETC., are used in the half cells having either gas or liquid reactant or product. platinum- `H_(2)` gas is the example of inert electrode.

31.	Glycerine has
Answer» One PRIMARY and TWO secondary -OH groups One secondary and two primary -OH groups Three primary -OH groups Three secondary -OH groups Solution :`{:(CH_(2)-OH),(\|),(CH-OH),(\|),(CH_(2)-OH):}` one secondary and two primary alcoholic groups.

32.	Give the trend of electronegativity of elements of Group-VA.
Answer» Solution :The DECREASING ORDER of electronegativity of Group-VA ELEMENT is: `NgtPgtAsgtSbgtBi`, where Nitrogen is the most electronegative element.

33.	Glycerides are
Answer» ESTERS of FATTY ACIDS and glycol esters of fatty acids and glycerol esters of fatty acids and sorbitol esters of fatty acids and glucose Answer :B

34.	Glyceraldehyde is an example of………… in monosaccharides.
Answer» SOLUTION :ALDOTRIOSE

35.	Give the trade name of Hexamethylene tetraamine
Answer» SOLUTION :UROTROPINE

36.	Givethe totalnumberof isomersincludingstereoisomersobtainedon monochlorinationof isopentane .
Answer» Solution : totalsix isomers INCLUDING STEREISOMERS out of whichfourare OPTICALLY ACTIVE (two parisof enentiomaers) .

37.	Glutamic acid, H_(2)N-CH(CH_(2)COOH)-COOH has pK _(a_(1))(alpha-COOH)=2.2, pK_(a_(2))(alpha-NH_(3))=9.8 and pK_(a_(3))=("R group"COOH)=4.3. The isoelectric point of glutamic acid is
Answer» `5.9` `7.0` `10.2` `3.2` Solution :`{:(H_(3)overset(+)-CH-COOH),(""\|),(""CH_(2)CH_(2)COOH),("""Cationic form"):} overset("On NEUTRALIZATION")underset("1st ionization")to` `{:(H_(3)overset(+)N-CH-COO^(-)),(""\|),(""CH_(2)CH_(2)COOH):}` `underset("2 ND ionization")to {:(H_(3)overset(+)-CH-COO^(-)),(""\|),(""CH_(2)CH_(2)COO^(-)):}` Isoelectric point `(pI)=(pK_(a_(1))+pK_(a_(2)))/(2)=(2.2+4.3)/(2)=3.25`

38.	Give the synthesis of melamine formaldehyde resin. Mention its uses.
Answer» Solution :It is synthesised by the polymerisation of MELAMINE with formaldehyde as shown ahead: Uses. It is used in making UNBREAKABLE cups, PLATES and plastic CROCKERY.

39.	Glyceraldehyde and Dihydroxy acetone are a pair of
Answer» Anomers Enantiomeres Functional isomers EPIMERS ANSWER :C

40.	Give the strutures of (A), (B) and (C ) in the following reactions : i. ii. C_(6)H_(5)N_(2)CI overset(CuCN)rarr (A) overset(H_(2)O //H^(+))rarr (B) overset(NH_(3))underset(Delta)rarr (C) iii. CH_(3)CH_(2)Br overset(KCN)rarr (A) overset(LiAIH_(4))rarr (B) overset(HNO_(2))underset(0^(@)C)rarr (C) iv. C_(6)H_(5)NO_(2) overset(Fe//HCI)rarr (A) overset(NaNO_(2)+HCI)underset(273K)rarr (B) overset(H_(2)O //H^(+))underset(Delta)rarr (C) v. CH_(3)COOH overset(NH_(3))underset(Delta)rarr (A) overset(NaOBr)rarr (B) overset(NaNO_(2) //HCI)rarr (C) vi. C_(6)H_(5)NO_(2) overset(Fe //HCI)rarr (A) overset(HNO_(2))underset(273K)rarr (B) overset(C_(6)H_(5)OH)rarr (C)
Answer» Solution :` (##KSV_CHM_ORG_P2_C15_E01_030_S01.png" WIDTH="80%"> ii. iii. iv. V. VI. .

41.	Glutaric acid is :
Answer» butane-1, 4-dioic ACID propane-1, 3-dioic acid pentane-1, 5-dioic acid hexane-1, 4-dioic acid Solution :(C) GLUTARIC acid is pentane-1,5-dioic acid.

42.	GLy-Al-Gly which formula is true for Tripeptide ?
Answer» ANSWER :C

43.	Give the suitable chemical tests that defines the open chain structure of glucose.
Answer» Solution :(i) The molecular formula of glucose is `C_(6)H_(12)O_(6)`. (ii) On prolonged reaction with HI, it forms n-hexane, suggesting that all the six CARBONS of glucose are linked in a straight chain. `{:(""CHO),("\|"),(" "(CHOH)_(4)),("\|"),(""CH_(2)OH):}overset(HI,Delta)rarrunderset("(n - Hexane)")(CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(2)-CH_(3))` (iii) Glucose reacts with hydroxyl amine to form an oxime and adds a molecule of hydrogen cyanide to form cyanohydrin. These reactions confirm the presence of carbonyl group in the glucose. (iv) Glucose gets oxidized to six carbon carboxylic acid (gluconic acid) on reaction with a MILD oxidizing agent like bromine water. This indicates that carbonyl group present is the aldehydic group. `{:(""CHO),("\|"),(" "(CHOH)_(4)),("\|"),(""CH_(2)OH):}overset(Br_(4)" Water")rarr{:(""COOH),("\|"),(" "(CHOH)_(4)),("\|"),(underset("Gluconic acid")(""CH_(2)OH)):}` (v) Acetylation of glucose with acetic anhydride gives glucose pentaacetate with confirms the presence of five -OH groups. Since it exists as a stable COMPOUND, the five -OH groups should be attached to the different carbon atoms. (vi) When oxidized by nitric acid, glucose as well as gluconic acid yields dicarboxylic acid, saccharic acid. This indicates the presence of primary alcoholic `(-OH)` group in glucose. The exact spatial arrangement of different -OH group was given by Fischer after studying many other properties. Its configuration is correctly represented as I. So, the gluconic acid is represented as II and saccharic acid as III.

44.	Glucosedoes not react with
Answer» HCN `NaHSO_3` `NH_2OH` `C_6H_5NHNH_2` ANSWER :B

45.	Give the structural formula of (i) 2-amino-2-methyl propane. (ii) 2-(N, N-dimethyl) amino butane
Answer» SOLUTION :

46.	glucose will show mutarotation when solvent is
Answer» Acidic BASIC Neutral Amphoteric Solution :In neutralsolvents, glucose SHOWS mutarotation.

47.	Glucose with excess of phenylhydrazine from :
Answer» Fructosazone GLUCOSE PHENYL HYDRAZONE GLUCOSAZONE Phenyl hydrazone of glucosazone ANSWER :C

48.	Give the strucutres and IUPAC names of monohydric phenols of molecular formula, C_(7)H_(8)O.
Answer» SOLUTION :THREE ISOMERS are POSSIBLE

49.	Glucose will show mutarotation when solvent is :
Answer» ACIDIC BASIC NEUTRAL Amphoteric Answer :D

50.	Give the structures of the products you would expect when each of the following alcohol reacts with SOCl_2a.butan-1-olb.2-methylbutan-2-ol
Answer» SOLUTION :Both REACT to from the CORRESPONDING CHLORIDES