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.	Grignard reagent can give aldehyde with :
Answer» ETHYL formate ethyl orthho formate methyl cyanide hydrogen cyanide Answer :A::B::D

2.	Grignardreagent givesalkane with :
Answer» `C_(2)H_(5)OH` `HOH` `NH_(3)` `C_(2)H_(5)NH_(2)` ANSWER :A,B,C,D

3.	Explain the reaction between carbonyl compounds with Grignard reagent
Answer» ROH RCOCI RCN CO Answer :C

4.	Grignard reagent can be prepared in:
Answer» DIETHYL ETHER Alcohol Benzene None of these Answer :A

5.	Grignard reagent can be prepared in :
Answer» DIETHYL ether Alcohol Benzene None of these. Answer :D

6.	Grignard reagent and acetyl chloride does not react with :
Answer» `RNH_2` `R_2NH` `R_3` None Answer :C

7.	Grignard reagent and ethyl acetate react to give :
Answer» acid ketone aldehyde alcohol. Answer :B

8.	Grignard reagent adds to:
Answer» C = O `-C -= N` C = S All of the above ANSWER :4

9.	Grignard reagent adds to
Answer» A) B) `-C-= N` C) D) all of the above Solution :Grignard reagent gives ADDITION REACTIONS with compounds containing

10.	Grignard reactions generally occur in dry ether because
Answer» The stronger ACID diethyl ether will displace the weaker RH acid from its salt The stronger acid `H_2O` will displace the weaker acid RH from its salt WATER slows down the reaction Water mixes with ether preventing ether to perform its function Solution :`{:(RMGX+,H_2Oto, RH+,MG(X)OH),("Stronger base","stronger acid","weaker acid","weaker base"):}`

11.	Griganrds reagent add to,
Answer» `gtC=O` `-C-=N` `gtC=S` all of these ANSWER :D

12.	Greenhouse gas CO_(2) can be converted to CO(g) by the following reaction CO_(2)(g)+H_(2)(g) rarr CO_(2)+H_(2)O(g) , termed as water gas reaction. A mixture of gases containing 35 vol% of H_(2),45 vol.% of CO and 20 vol. % H_(2)O is heated to 1000K . What is the composition of the mixture at equilibrium?
Answer» SOLUTION :N//A

13.	Griganrd reagent shows addition on :
Answer» ` GT C=O` `-C=N` `C=S` All Answer :D

14.	Gem - dibromide is
Answer» `CH_(3)CH(BR)CH_(2)(Br)` `CH_(3)CBr_(2)CH_(3)` `CH_(2)(Br)CH_(2)CH_(2)` `CH_(2)BrCH_(2)Br` Solution :Gem-dihalides are those in which TWO halogen ATOMS are ATTACHED on the same CARBON atom.

15.	Green vitriol is formed by :
Answer» `FeS_2 + CO` `FeS_2 + H_2O +CO_2` `FeS_2 + H_2O + O_2` `FeS_2 + CO + CO_2` ANSWER :C

16.	Green vitriol is a hydrated salt with formula FeSO_(4).xH_(2)O. What is the value of x
Answer» Solution :(7) Green VITRIOL- `FeSO_(4).7H_(2)O`

17.	Green vitriol is
Answer» `FeSO_(4).7H_(2)O` `ZnSO_(4).7H_(2)O` `CaSO_(4).2H_(2)O` `CuSO_(4).5H_(2)O` Solution :GREEN vitrol is `FeSO_(4).7H_(2)O`

18.	Green vitriol is :
Answer» `CuSO_4. 5H_2O` `FeSO_4(NH_4)_2SO_4. 6H_2O` `FeSO_4. 7H_2O` `FeCl_3. 3H_2O` ANSWER :C

19.	Green muffler is used against which type of pollution
Answer» Soil Water Air Noise Solution :Large green plants are PLANTED in high noise POLLUTION zone because they have capacity to absorb sound waves and these green plants for CHECKING noise pollution are known as green MUFFLER.

20.	Green colour of leaves is due to presence of chlorophyll which is a complex compound. Which metal is present in it?
Answer» SOLUTION :MAGNESIUM

21.	Green house effect is due to the presence of
Answer» Moisture LAYER in the ATMOSPHERE Infrared light reaching the earth Ozone layer in the atmosphere `CO_2` layer in the atmosphere Solution :About 50% of increase in earth's TEMPERATURE is due to `CO_2` 20% due to chlorofluorocarbons.

22.	Green house effect is caused by
Answer» GREEN PLANTS INFRA RED rays UV rays X rays Answer :B

23.	Green house effect is accelerated by :
Answer» Deforestation Rapid industrialization Increased TRANSPORTATION activity All of the above Answer :D

24.	Green chemistry refers to
Answer» chemistry of plants chemistry of green pigments DEVELOPMENT of CHEMICAL products and processes, LESS HARMFUL to HUMANS chemistry of greenhouse effect. Solution :development of chemical products and processes, less harmful to humans

25.	Greenchemistry meanssuchreactions which :
Answer» Producecolourduringreaction Reducethe useand production of hazqrdouschemical Arerelatedto the DEPLETION of ozonelayer STUDY thereactionin plants. ANSWER :B

26.	Green chemistry deals with the production and use of
Answer» PLASTICS ENVIRONMENTAL FRIENDLY MATERIALS cheap materials non-biodegradable materials. Solution : environmental friendly materials

27.	Green chemistry deals with study of ?
Answer» study of plant physiology study of extraction of natural PRODUCTS from plants detailed study of REACTIONS involved in synthesis of chlorophyll utilization of existing knowledge base reducing the chemical HAZARDS along with DEVELOPMENT activities ANSWER :D

28.	Greater the valency, the higher is the coagulating power of ion. This rule was introduced by
Answer» Hard-Schulze Graham Kossel and Lewis Faraday Answer :A

29.	Greater the gold number of a protective colloid, greater is its protecting power.
Answer» SOLUTION :False. Protecting power VARIES inversibly as GOLD number.

30.	Greater range of oxidation states of actinoids is because
Answer» 5f, 6D and 7s LEVELS are of COMPARABLE ENERGIES. They possess large atomic numbers. They possess large atomic masses. They are radioactive. Answer :A

31.	Gravity separation process may be used for the concentration of
Answer» CHALCOPYRITE Bauxite Haematite CALAMINE ANSWER :C

32.	Gravity separation method is based upon
Answer» prefential washing of ORES and gangue particles diferences in dinsities of ore particles and impurities diferences in chemical PROPERTIES of ore particles and impurities none Solution : Gravity separation method is based UPON DIFFERENCES in densities of ore particles and impurities (or) specific GRAVITIES.

33.	Gravity separation is alsocalled as……….
Answer» SOLUTION :HYDRAULIC WASHING

34.	Graphite rods are frequentlyreplaced in Hall-Heroult's process of extracting aluminium metal. Why ?
Answer» SOLUTION :Fluoride ions move towards graphiteanodeand are dischared to give active fluorine. Thisfluorine displaces oxygen of ALUMIN. Oxygen reacts withgraphite. Thusgraphite gets corroded and is to be replaced frequently in the Hall-Heroult.s process of EXTRACTING ALUMINIUM.

35.	Graphite is used in nuclear reactors :
Answer» As a lubricant As a fuel As moderator None of the above Answer :C

36.	Graphite is used in nuclear reactor :
Answer» for REDUCING the speed of neutrons as a fuel as a lubricant for LINING the inner SURFACE of the reactor which will work as an insulator. Answer :A

37.	Graphiteis usedasananodebutnotdiamond. Givereason.
Answer» Solution :Graphiteisa goodconductorofelectricity DUE tothepresenceoffreeelectronswithin its layerswhichhelptoconduct electricity. DIAMOND,on theother hand,ISA hand,isa bad conductorofelectricity sincenofreeelectronsarepresentin itsstructure. Consequently,diamond isnot USED as an ANODE.

38.	Graphite is soft while diamondis hard because
Answer» Graphite in POWDER form Diamond has `SP^(2)` hybridization but graphite has `sp^(3)` hybridization Graphite is in planar form while diamond is in tetrahedral form Graphite is COVALENT and diamond is ionic ANSWER :C

39.	Graphite is soft because:
Answer» It has THREE dimensional structure It has LAYER structure It is black It has low density Answer :B

40.	Graphite is similar in structure to :
Answer» B BN `B_4C` `B_2H_6` ANSWER :B

41.	Graphite is made by heating coke with silica for many hours in a:
Answer» BLAST furnace Blast of STEAM under pressure In PRESENCE of air High ELECTRIC ARC furnace Answer :D

42.	Graphite is good conductor of current but diamond is non-conductor because :
Answer» Deamond is hard and GRAPHITE is SOFT Graphite and diamond have different ATOMIC configuration Graphite is composed of POSITIVELY charged carbon ions Carbon in graphite is `sp^2`-hybridised while carbon in diamond is `sp^3` hybridised. Answer :C

43.	Graphite is anisotropic with respect to conduction of electric current. Explain.
Answer» Solution :Graphite is anisotropic with respect to electric CONDUCTION DUE to the different arrangement of CARBON atoms in different DIRECTIONS.

44.	Graphite is an example of:
Answer» IONIC SOLID COVALENT solid Van DER Waal.s crystal Methallic crystal Answer :B

45.	Graphite is an example of -
Answer» IONIC SOLID Covalent solid Vander WAAL's CRYSTAL METALLIC crystal Answer :B

46.	Graphite is a soft solid lubricant extremely difficult to melt.The reason for this anomalous behaviour is that graphite
Answer» is an allotropic form of carbon is a non-crystalline substance has carbon ATOMS arranged in large plates of weak interplate bonds has MOLECULES of VARIABLE molecular masses like polymers. Solution :Graphite has carbon atoms arranged in large plates of rings of strongly bound carbon atom with weak interplate bonds as they held by van der Wall's forces. Thus two adjacent layers can easily slide over each other.Therefore graphite is soft and possesses low density.Also DUE to `sp^(2)` hybridisation. Therefore C-C bond is SHORTER and stronger therefore have high melting point.

47.	Graphite is a non-metal, but its electrical behaviour is like metals. Explain.
Answer» Solution :Graphite is a non-METAL, but tr is like metals. EXPLAIN. iphite consists of a layer strucl its electrical ure having an I hexagonal arrangement of carbon atoms. Each carbon atom is `sp^(2)` hybridized and CONNECTED to three more carbon atoms by sigma bonds. Hexagonal structures in each layer are connected to each other through the weak overlap of fourth electron present on each carbon atom PERPENDICULAR to the molecular PLANE. Weak overlap leads to the formation of band structure which is half filled and half empty, thus responsible for free motion of electron.Hence graphite acts an electrical conductor.However it may be noted that metal is a 3D- conductor, but graphite is a 2D- conductor

48.	Graphite is a good conductor of electricity due to the presence of
Answer» LONE PAIR of ELECTRONS FREE VALENCE electrons cations anions Solution :free valence electrons

49.	Graphite is a good conductor of electricity due to the presence of ___
Answer» LONE PAIR of ELECTRONS FREE VALENCE electrons cations anions Solution :free valence electrons

50.	Graphite is a good conductor of electricity due to the presence of ..........
Answer» LONE pair of electrons free valence electrons cations anions Solution :In GRAPHITE carbon is `sp^2` HYBRIDIZED. Hence one electron of carbon is free and so graphite conducts electricity.