Magme Guru: CHEMISTRY

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Monday, June 22, 2020

UPSC June 22, 2020

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 120

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 120

1191). Natural rubber is
A). Polymer of ethylene
B). Polymer of butadiene
C). Polymer of acetylene
D). Polymer of 2 methyl butadiene

Answer: Polymer of 2 methyl butadiene


1192). Which of the following is correct regarding steel?
A). Iron with > 0.5% carbon
B). Iron with < 0.25% carbon
C). Iron with 0.25 - 2% carbon
D). Iron with 2 - 45% carbon

Answer: Iron with 0.25 - 2% carbon


1193). Which is wrongly matched? .
A). Zinc - Enzymes
B). Iron - Haemoglobin
C). Magnesium - Dry cell
D). Beryllium - X ray tubes

Answer: Magnesium - Dry cell


1194). The state of matter in their increasing entropy is
A). Solids, Liquids, Gases, BECs
B). Liquids, Gases, BECs, Solids
C). Gases, Liquids, Solids, BECs
D). BECs, Solids, Liquids, Gases

Answer: BECs, Solids, Liquids, Gases


1195). Identify the odd one from the group of materials given below:
Glass, ebonite, copper, rubber
A). ebonite
B). copper
C). glass
D). rubber

Answer: copper

1196). The oxidation states of nitrogen in the following equations are:
4[NH3OH]^+ --> N2O + 2NH4^+ + 2H^+ + 3H2O

(X) (Y) (Z)
A). '+1 0 -3
B). '-1 1 -2
C). '-1 -2 -3
D). '-1 1 -3

Answer: '-1 1 -3


1197). During the oxidation of acidified ferrous ammonium sulphate with dichromate solution
A). The oxidation number of chromium and iron changes from +6 to +3 and +3 to +2 respectively.
B). The oxidation number of chromium and iron changes from +3 to.+6 and +3 to +2 respectively.
C). The oxidation number of chromium and iron changes from +6 to +3 and +2 to +3 respectively.
D). The oxidation number of chromium and iron changes from +2 to +3 and +6 to +3 respectively.

Answer: The oxidation number of chromium and iron changes from +6 to +3 and +2 to +3 respectively.


1198). Consider the following statements:
Assertion (A) : Copper is mainly used in Electrical Engineering Industry.
Reason .(R): Copper has the property of high conductivity.
Now select your answer according to the coding scheme giVen below:
A). Both (A) and (R) are true and (R) is the correct explanation of (A)
B). Both (A) and (R) are true, but (R) does not explain (A)
C). (A) is true, but (R) is false
D). (A) is false, but (R) is true

Answer: Both (A) and (R) are true and (R) is the correct explanation of (A)


1199). The conjugate base of [Fe(H2O)6]^+3 is
A). [Fe(H2O)5OH]^+3
B). [Fe(H2O)5OH]^+2
C). [Fe(H2O)5]^+3
D). H2O

Answer: [Fe(H2O)5OH]^+2


1200). In the extract of iron haematite ore, the flux added and gangue formed respectively are
A). oxygen, iron oxide
B). carbon dioxide, iron carbonate
C). silica, iron silicate
D). sulphur dioxide, ion sulphate A

Answer: silica, iron silicate

Magme Guru 0

UPSC June 22, 2020

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 119

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 119

1181). Duralumin contains

A). Mg and Al

B). Al and Au

C). Mn and Al

D). Zn and Al

Answer: Mg and Al

1182). Magnetic separation is used for the concentration of

A). Argentite

B). Galena

C). Haematite

D). Magnesite

Answer: Haematite

1183). Consider the following statements:

Assertion (A): Diamond is thermodynamically more stable than graphite at room temperature and ordinary pressure.

Reason (R): In diamond each carbon is tetrahedrally surrounded by four other carbon atoms and the tetrahedral are linked together into a three dimensional giant molecule.

Now select your answer according to the coding scheme given below:

A). Both (A) and (R) are true and (R) is the correct explanation of (A)

B). (A) is false and (R) is not correct explanation of (A)

C). (A) is true, but (R) is false

D). Both (A) and (R) are false

Answer: Both (A) and (R) are true and (R) is the correct explanation of (A)

1184). Match List I correct with List II and select your answer using the codes given below:

List I List - II

a) Malathion 1) Rodenticide

b) Calomel 2) Herbicide

c) Atrazine 3) Fungicide

d) Nor-bromide 4) Insecticide

Codes:

a b c d

A). 4 3 2 1

B). 1 4 3 2

C). 3 2 1 4

D). 2 1 4 3

Answer: 4 3 2 1

1185). Which of the following is the correct pH range of blood of a healthy person?

A). 6.9 - 7.1

B). 7.0 - 8.0

C). 7.21 - 8.10

D). 7.35 - 7.45

Answer: 7.35 - 7.45

1186). The radio isotopes for blood circulation disorder or thyroid disorder are

A). radio sodium and radio iodine

B). radio sodium and radio phosphorus

C). radio iodine and radio phosphorus

D). radio iron and radio sodium

Answer: radio sodium and radio iodine

1187). 'Argentine' is chief ore/mineral of

A). silver

B). gold

C). mica

D). limestone

Answer: silver

1188). Consider the following:

l. CO burns with a blue flame.

ll. CO is good reducing agent and reduces alkali metal oxides.

Ill. CO is toxic because it forms a complex with haemoglobin in the blood and this complexes is 300 times more stable than oxyhaemoglobin.

IV. CO from complex with Ni at 50°C

and decomposition resulting complex gives pure Ni.

Which of the statements given above is/are correct?

A). All are correct

B). (ll) is not correct while (I), (III) and (IV) are correct

C). (I), (II) and (III) only are correct

D). (II), (III) and (IV) are correct

Answer: (ll) is not correct while (I), (III) and (IV) are correct

1189). The pH of a soft drink is 3 and that of milk is 7. How many times greater is the concentration of H3O^+ in soft drink than in milk?

A). 4 times

B). 40 times

C). 1000 times

D). 10,000 times

Answer: 10,000 times

1190). Nicotine upon-oxidation with chromic acid gives

A). Pyridine - 3 - Carboxylic acid

B). Pyridine - 2 - Carboxylic acid

C). Pyridine - 4 - Carboxylic acid

D). Pyridine - 2,3 - Dicarboxylic acid

Answer: Pyridine - 3 - Carboxylic acid

Magme Guru 0

UPSC June 22, 2020

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 118

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 118

1171). The ground state energy of the electron hydrogen atom is 13.6 eV. The energy of the state n = 2 is

A). 13.6 eV

B). 6.8 eV

C). 4.5 eV

D). 3.4 eV

Answer: 3.4 eV

1172). Consider the following statements: .

l. Diamond is a bad conductor of electricity.

ll. Graphite is used for making electrodes of electric furnaces.

lll. Solid carbon monoxide is known as dry ice.

IV. Carbon dioxide turns most litmus us slightly bluish.

Which of the above statement is/are correct?

A). (l) and (Ill)

B). (ll) and (Ill)

C). (I) and (II)

D). (III) and (IV)

Answer: (I) and (II)

1173). Match List I with List ll correctly and select your answer using the codes given below:

List .1 (Ores) List II (Metals)

a) Haematite 1) Lead

b) Cinnabar 2) Iron

c) Calamine 3) Mercury

d) Galena 4) Zinc

Codes:

a b c d

A). 2 3 4 1

B). 3 2 1 4

C). 2 4 3 1

D). 4 2 1 3

Answer: 2 3 4 1

1174). Critically observe the reaction and choose the correct RQ from the options given below:

C15H24O2+25.5O218CO2+17H2O

The correct RQ of this reaction is

A). 0.071

B). 0.71

C). 7.1

D). 71

Answer: 0.71

1175). Which of the following statements is not correct?

A). An increase in oxidation number of an element implies that the element has undergone oxidation.

B). An increase in oxidation number of an element implies that it has undergone reduction.

C). The oxidation number of an element can be a fraction.

D). Oxidation number of an element is a positive or negative integer.

Answer: An increase in oxidation number of an element implies that it has undergone reduction.

1176). Choose the correct order the increase in the oxidation number of iodine in the following compounds: I2, HI, HIO4 and ICl

A). I2, HI, ICl, HIO4

B). HI, ICl, HIO4, I2

C). HI, I2, ICl, HIO4

D). HIO4, ICl, I2, HI

Answer: HI, I2, ICl, HIO4

1177). Examine the following statements carefully and select the answer using the code given below:

Assertion (A): Boron carbide is used to make bullet-proof clothing.

Reason (R1): It is an intestitial carbide and has isosahedral structure.

Reason (R2) : The fibres of them have enormous tensile strength.

A). All (A), (R1) and (R2) are correct

B). (A) is correct, (R1) is the correct explanation for (A) and (R2) is incorrect.

C). (A) is correct both (R1) and (R2) are correct but cannot explain (A).

D). (A) is correct, (R1) is incorrect but (R2) is the correct explanation for (A)

Answer: (A) is correct, (R1) is incorrect but (R2) is the correct explanation for (A)

1178). Consider the following statements:

Assertion (A): in nature Ag and Pb occur as oxides and not as sulphides.

Reason (R): The cations of Ag and Pb can polarise O^2- ion easily than S^2 ion.

Now select your answer according to the coding scheme given below:

A). Both (A) and (R) are true and (R) is the correct explanation of (A)

B). Both (A) and (R) are true, but (R) is not the correct explanation of (A)

C). (A) is true, but (R) is false

D). Both (A) and (R) are false

Answer: Both (A) and (R) are false

1179). The oxidant used in the testing of alcohol in breadth is

A). MnO2

B). KMnO4

C). K2Cr2O7

D). KNO3

Answer: K2Cr2O7

1180). Sulphide ores are concentrated by

A). hand picking

B). magnetic separation

C). gravity separation

D). froth floatation

Answer: froth floatation

Magme Guru 0

UPSC June 22, 2020

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 117

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 117

1161). Natural gas is a mixture of aliphatic hydrocarbons. What is the main important gas available in that?

A). Oxygen O2

B). Nitrogen N2

C). Methane CH4

D). Carbon-di-oxide CO2

Answer: Methane CH4

1162). An alkane earth metal 'M' forms covalent compounds. It forms water soluble sulphate MSO4 and water insoluble hydroxide M(OH)2 which is amphoteric in nature. The metal 'M' is ............

A). Calcium

B). Beryllium

C). Magnesium

D). Strontium

Answer: Beryllium

1163). During electrolysis of molten calcium hydride .................

A). calcium is deposited at anode

B). hydrogen is liberated at anode

C). hydrogen is liberated at cathode

D). hydrogen and oxygen are liberated at cathode and anode respectively.

Answer: calcium is deposited at anode

1164). Aqueous solution of which of the following is a good conductor of electricity?

A). Ammonium acetate

B). Glucose

C). Ammonia

D). Acetic acid

Answer: Acetic acid

1165). Ammonia burnt with O2 liberate which of the following ions/radicals?

A). NH4^+ + OH

B). N2+H2O

C). NO2+H2O

D). N2+H2

Answer: N2+H2O

1166). The laws of-electrolysis are given by

A). Ostwald

B). Faraday

C). Arrhenius

D). Lewis

Answer: Faraday

1167). How many electrons can be accommodated in d-orbital?

A). 3

B). 6

C). 10

D). 8

Answer: 10

1168). The toxic carcinogenic metal ion in the following is

A). Cr^0

B). Cr^3+

C). Cr^2+

D). Cr^6+

Answer: Cr^6+

1169). The specific rotation, if the plane of polarisation is turned through 26.4°

traversing 20 cm. length of 20% sugar solution is

A). 6.6°

B). 0.66°

C). 66°

D). 6°

Answer: 66°

1170). Which of the following is natural polymer?

A). cellulose

B). polystyrene

C). polythylene

D). nylon

Answer: cellulose

Magme Guru 0

UPSC June 22, 2020

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 116

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 116

1151). Lead is considered as

A). Air pollutant

B). Water pollutant

C). Soil pollutant

D). All of these

Answer: All of these

1152). Which of the following gases is absorbed mostly by activated charcoal?

A). CO2

B). N2

C). CH4

D). Ar

Answer: CO2

1153). What is the chemical difference between celluloid and cellophane?

A). These two material have the same chemical composition

B). Cellophane is much more inflammable than celluloid

C). Celluloid contains Nitrogen while cellophane does not

D). Photographic images stick better to celluloid.

Answer: Celluloid contains Nitrogen while cellophane does not

1154). The Avogadro number is

A). 6.00×10^24

B). 6.023×10^23

C). 6.054×10^22

D). 6.504×10^22

Answer: 6.023×10^23

1155). The oxidation number of Fe in K3[Fe(CN)6]

A). 2

B). 3

C). 1

D). 4

Answer: 3

1156). Which of the following is Natural Rubber?

A). Polyester

B). Polyamide

C). Polyisoprene

D). Polysaccharide

Answer: Polyisoprene

1157). The end product of fermentation of molasses of sugarcane by yeast is

A). Pyruvate

B). Phenol

C). Lactic acid

D). Ethyl alcohol

Answer: Ethyl alcohol

1158). Which of the following is correctly matched?

A). TNT-Fertilizer

B). Gasoline-Petrochemical

C). Potassium Sulphate-Explosive

D). Cement-Molecular crystal

Answer: Gasoline-Petrochemical

1159). An example of addition co-polymer is

A). Buna - S

B). PVC

C). Neoprene

D). Glyptal

Answer: Buna - S

1160). The reaction that takes place in a Daniel cell is

A). Cu+Hg-->Cu.Hg

B). Zn^0+Cu^2+ --> Zn^2+ +CU^0

C). Cu^2+ + 2Ag-->Cu^0 + 2Ag^+

D). 3fe^2+Cr^6+ --< 3Fe^3+ + Cr^3+

Answer: Zn^0+Cu^2+ --> Zn^2+ + CU^0

Magme Guru 0

UPSC June 22, 2020

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 115

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 115

1141). Formalin is an aqueous solution of

A). methanol

B). methanal

C). propanone

D). ethanol

Answer: methanal

1142). Which of the following is weak acid?

A). HCl

B). CH2COOH

C). HNO3

D). H2SO4

Answer: CH2COOH

1143). ...................is used in the manufacture of artificial leather

A). Ketone

B). Acetone

C). Aldehyde

D). Acitic acid

Answer: Acetone

1144). The greenhouse gas is

A). O2

B). H2

C). N2

D). CO2

Answer: CO2

1145). The polymer used in the manufacture of electrical goods like switches, plug, etc., is

A). Chloroprene

B). Bakelite

C). Teflon

D). Nylon

Answer: Bakelite

1146). Chlorofluoro Carbon contributes about ..... percent of global warming.

A). 10.4

B). 6

C). 14

D). 20

Answer: 10.4

1147). Sulphates of calcium, barium and strontium exhibit

A). Chemiluminescence

B). Fluorescence

C). Phosphorescence

D). Bioluminescence

Answer: Fluorescence

1148). The products. in the electrolysis of aqueous potassium bromide are

A). Potassium metal and Oxygen

B). Potassium metal and Bromine

C). Hydrogen and Bromine .

D). Oxygen and Bromine

Answer: Potassium metal and Bromine

1149). Which statement is correct?

A). All minerals are ores

B). A mineral cannot be an ore

C). An ore cannot be a mineral

D). All ores are minerals

Answer: All ores are minerals

1150). Which metal is used for Galvanisation of iron

A). Chromium

B). Zinc

C). Nickel

D). Manganese

Answer: Zinc

Magme Guru 0

UPSC June 22, 2020

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 114

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 114

1131). Breathalyzers determine alcohol content through the redox reaction

Cr2O2^7+C2H5OH-->Cr^3++C2H4O2

Which substance is being reduced?

A). Cr^3+

B). Cr2O7^2

C). C2H5OH

D). Cr^3+ and Cr2O7^2

Answer: C2H5OH

1132). Which oxide of nitrogen is formed when ammonium nitrate is heated?

A). N2O

B). NO

C). NO2

D). N2O5

Answer: N2O

1133). Why aspirin has a sour taste?

A). The acidic nature of aspirin

B). The sour flavour is added to help prevent overdosing

C). Aspirin is made sour as mandated child safety feature

D). It is the basic nature of aspirin

Answer: The acidic nature of aspirin

1134). Rusting of iron is ........... process

A). oxidation

B). reduction

C). neither oxidation nor reduction

D). both oxidation and reduction

Answer: oxidation

1135). Match List l with List ll correctly and select your answer using the codes given below

List l List II

a) Ammonium sulphate 1) Fertilizer

b) Chloroform 2) Reducing agent

c).Carbon 3) Anaesthesia

d) Hydrogen peroxide 4) Bleaching agent

Codes:

a b c d

A). 1 3 2 4

B). 1 2 3 4

C). 2 3 4 1

D). 3 2 1 4

Answer: 1 3 2 4

1136). Consider the following statements:

Assertion (A): Drinking soda is mildly acidic in nature.

Reason (R): It contains carbon dioxide.

Now select your answer according to the coding scheme given below:

A). Both (A) and (R) are, true and (R) is the correct explanation of (A)

B). Both (A) and (R) are true, but (R) is not the correct explanation of (A)

C). (A) is true, but (R) is false

D). (A) is false, but (R) is true

Answer: Both (A) and (R) are, true and (R) is the correct explanation of (A)

1137). Enriched Uranium is

A). Uranium U-238

B). Uranium U-235

C). Uranium mixed with Thorium

D). Uranium mixed with Plutonium

Answer: Uranium U-235

1138). The compound whose aqueous solution is basic in nature is

A). NaNO3

B). Na2CO3

C). Na2SO4

D). MgCl2

Answer: NaNO3

1139). The mobility of H^+ ion in aqueous solution is high because

A). of the small size of H^+ ion

B). it has no electron

C). it exhibits Grothus type of conduction

D). hydrogen is the lightest element

Answer: it exhibits Grothus type of conduction

1140). The molarity of sulphuric acid is 2M. The normality of sulphuric acid is ...........N.

A). 2

B). 4

C). 3

D). 1

Answer: 4

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Monday, June 22, 2020

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 120

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 119

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 118

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 117

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 116

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 115

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 114

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