Class 10 Chemistry Past Papers MCQs Grand Practice Test by admin | Class 10 MCQs Tests | 0 comments 0% 3 Class 10 ChemistryPast Papers MCQsGrand Practice Test 1 / 174 Acid rain has pH less than: 9.5 7.5 8.5 5.6 2 / 174 Which gas has lowest percentage in the air? Hydrogen Oxygen Carbon dioxide Nitrogen 3 / 174 Ultraviolet radiations are absorbed by ozone in the stratosphere, that is why: Temperature of stratosphere increases Ozone holes are formed Ozone layer is destroyed Temperature of stratosphere decreases 4 / 174 Which is an alcohol? CH_{ 3 }-OH CH_{ 3 }-CH_{ 2 }-O-CH_{ 2 }-C{ H }_{ 3 } CH_{ 3 }-CH_{ 2 }-COOH CH_{ 3 }-CH_{ 2 }-N{ H }_{ 2 } 5 / 174 Plants convert glucose into: Lipids Starch Amino acids Proteins 6 / 174 Formic acid contains functional group: −OH −COOH −CHO −CO− 7 / 174 What is the concentration of { H }^{ + } ion in the milk of magnesia? { 10 }^{ -10 } { 10 }^{ -8 } { 10 }^{ -7 } { 10 }^{ -9 } 8 / 174 Which process produces an alkane? Combustion Dehydration Hydrogenation Hydration 9 / 174 The emission of 𝐶𝑂, 𝑁𝑂 and unburned hydrocarbons can be reduced by using: Green houses Catalytic converters Filter Plants Incinerators 10 / 174 Highest temperature in Mesosphere is: −5 °C −60 °C −93 °C −55 °C 11 / 174 The formula of ammonium carbamate is: { NH }_{ 2 }CONH_{ 4 } { NH }_{ 2 }COONH_{ 4 } { NH }_{ 4 }Cl { NH }_{ 2 }CONH_{ 2 } 12 / 174 Chemical formula of Slaked lime is: CaC{ O }_{ 3 } Ca{ Cl }_{ 2 } CaO Ca{ (OH) }_{ 2 } 13 / 174 A drain cleaner contains 1.0 × { 10 }^{ -8 }M, { OH }^{ - } concentration, this solution is: Acidic Unpredictable Basic Neutral 14 / 174 Which substance is used as antacid and laxative? Ca{ (OH) }_{ 2 } KOH NaOH Mg{ (OH) }_{ 2 } 15 / 174 In an irreversible reaction, equilibrium is: Established slowly Established when reaction stops Established quickly Never established 16 / 174 Which coloured solution is produced, when Ketones are mixed with alkaline sodium nitro-prusside solution? Red Blue Orange Green 17 / 174 Nitrogen dioxide is synthesized according to the given equilibrium.2NO_{ (g) }+O_{ 2(g) }\rightleftharpoons 2N{ O }_{2 (g) }The unit of Kc, for this reaction is: { mol }^{ 2 }.{ dm }^{ -6 } { mol }.{ dm }^{ -3 } { mol }^{ -1 }.{ dm }^{ 3 } No units 18 / 174 Which of the following is the chemical formula of Haematite? Fe_{ 3 }O_{ 4 } FeO.Cr_{ 2 }O_{ 3 } Fe_{ 2 }O_{ 3 } FeO 19 / 174 For a reversible reaction K = \frac { { [C] }^{ 2 } }{ [A][B] } . The correct equation of above expression is: { C }_{ 2 }\rightleftharpoons A+B A + B \rightarrow 2C A + B \rightleftharpoons 2C 2C \rightleftharpoons A + B 20 / 174 For a reversible reactionK_{ C }=\frac { [HI]^{ 2 } }{ [{ H }_{ 2 }][{ I }_{ 2 }] } which substance is product of the reaction? { I }_{ 2 } HI Both { H }_{ 2 }and { I }_{ 2 } { H }_{ 2 } 21 / 174 For a general reaction 2A + B \rightleftharpoons 2C + D the rate of forward reaction will be equal to: { K }_{ f }{ [A] }^{ 2 }[B] { K }_{ f }[A][B] { K }_{ f }[2A][B] { K }_{ f }{ [A] }^{ 2 }+[B] 22 / 174 Reduction of Ethylchloride ({ C }_{ 2 }{ H }_{ 5 }Cl) produces. Ethyne Ethane Ethylalcohol Ethene 23 / 174 Which of the following is used as raw material for Solvay process? { NH }_{ 3 } and Brine { CH }_{ 4 } and { CO }_{ 2 } { NH }_{ 3 } and CO Ca{ (OH) }_{ 2 } and { CH }_{ 4 } 24 / 174 Which of the following is not a source of starch? Potato Rice Wheat Cotton 25 / 174 Which of the following is not the macroscopic characteristic of forward reaction? Reactants produce products Rate is fastest in the beginning and gradually slows down Products produce reactants It is written from left to right 26 / 174 Consider the following reaction,H_{ 2 }O+HCl\rightleftharpoons { H }_{ 3 }{ O }^{ + }+{ Cl }^{ - } ,which species is an electron pair acceptor in this reaction? { H }_{ 3 }{ O }^{ + } HCl { H }_{ 2 }O None of these 27 / 174 N{ H }_{ 3 } cannot be classified as a base by: Lewis Theory Bronsted - Lowery Theory Arrhenius Theory All of these 28 / 174 Addition of Hydrogen in the vegetable oil is due to presence of: C - H bonds C - C bonds H - O bonds C = C bonds 29 / 174 Which of the following is used as domestic fuel? Ethyne Chloroform Ethanol Methane 30 / 174 PbS is the formula of: Chalcopyrite Halite Chromite Galena 31 / 174 Which one of the following vitamins is fat soluble? None of these Vitamin A Vitamin C Vitamin B 32 / 174 Which of the following is a Lewis Base? { F }^{ - } AlCl_{ 3 } B{ F }_{ 3 } HCl 33 / 174 Which of following catalysts is used to form { NH }_{ 3 } gas from Nitrogen & Hydrogen gas? { Fe }_{ 3 }{ O }_{ 3 } FeO Fe Pt 34 / 174 Lowest temperature in stratosphere is: -55 °C 55 °C 5 °C -5 °C 35 / 174 Which is not a dextrose sugar? Fructose Galactose Mannose Glucose 36 / 174 In the following reaction which species is donating an electron pair?{ NH }_{ 3 }+{ BF }_{ 3 }\rightarrow { H }_{ 3 }N-{ BF }_{ 3 } B B{ F }_{ 3 } N H 37 / 174 Lowest temperature in stratosphere is: 55 °C -5 °C 5 °C -55 °C 38 / 174 Identify the compound responsible for acid rain: Vicinal dihalide Glyoxal Chlorofluorocarbons Sulphur dioxide 39 / 174 In which of the following compounds, oxygen is attached to two alkyl groups? Alcohols Ethers Phenols Esters 40 / 174 Which of the following is an ore of Aluminum? Haematite Bauxite Magnetite Halite 41 / 174 Raffinose ({ C }_{ 18 }{ H }_{ 32 }{ O }_{ 16 }) is a: Oligosaccharide Monosaccharide Polysaccharide Disaccharide 42 / 174 Which of the following is the functional group of amine? −OH −COOH −N{ H }_{ 2 } −CHO 43 / 174 The temperature inside a green house can be higher than the outside temperature. 10 to 15 °C 15 to 20 °C 20 to 25 °C 5 to 10 °C 44 / 174 Marble buildings and statues are destroyed by acid rain due to reaction of Sulphuric acid with: Fe CaCO_{ 3 } FeSO_{ 4 } Ca(N{ O }_{ 3 })_{ 2 } 45 / 174 Which of the following is used as raw material for preparation of urea? { H }_{ 2 }O and { NH }_{ 3 } { CO }_{ 2 } and { Ca(OH) }_{ 2 } { CO }_{ 2 } and { NH }_{ 3 } { NH }_{ 3 } and NaCl 46 / 174 Which of the following is used for ripening of fruits? Ethyne Benzene Methane Ethanol 47 / 174 Permanent hardness of water can be removed by: Ion exchange method Clark’s method Boiling Cooling 48 / 174 Which of the following is a Lewis base? AlCl_{ 3 } B{ F }_{ 3 } { Cl }^{ - } HCl 49 / 174 For a reversible reaction K = \frac { { [C] }^{ 2 } }{ [A][B] } . The correct product of above expression is: C Both A and B A B 50 / 174 Which of the following is a homocyclic compound? Thiophene Furan Benzene Pyridine 51 / 174 Chemical formula of ammonium carbamate is: { NH }_{ 4 }N{ O }_{ 3 } { (NH }_{ 4 })_{ 2 }SO_{ 4 } { NH }_{ 2 }COON{ H }_{ 4 } { NH }_{ 2 }CON{ H }_{ 2 } 52 / 174 Baeyer’s test is used to detect the presence of: Aldehyde Ketone Alkene Alkane 53 / 174 Compound of _________ helps to ensure antiseptic conditions in hospitals operating rooms. Phenol Aldehyde Alcohol Ether 54 / 174 The linkage which joins two amino acids is called: Metallic Bond Ionic Bond Covalent Bond Peptide Bond 55 / 174 Which of the following is used to remove permanent hardness in water? Slaked lime Washing soda Metal Hydrogen Carbonates Boiling water 56 / 174 Which scientist proposed the law of mass action? C.M Wanderwal C.M. Lewis C.M. Guldberg C.M. Gulder 57 / 174 Which of the following is an Ether? CH_{ 3 }-CH_{ 2 }-O-CH_{ 2 }-C{ H }_{ 3 } { C }_{ 6 }{ H }_{ 5 }-OH CH_{ 3 }-CH_{ 2 }-COOH CH_{ 3 }-CH_{ 2 }-OH 58 / 174 Which of the following reacts explosively with methane? { F }_{ 2 } { Br }_{ 2 } { I }_{ 2 } { Cl }_{ 2 } 59 / 174 By dehydration we mean the removal of: HCl { H }_{ 2 }{ O }_{ 2 } { H }_{ 2 } { H }_{ 2 }O 60 / 174 Each DNA nucleotide consists of: 5 components 4 components 2 components 3 components 61 / 174 Which of the following is not a waterborne disease? Typhoid Hepatitis Dysentery Anemia 62 / 174 Consider the following reaction,H_{ 2 }O+HCl\rightleftharpoons { H }_{ 3 }{ O }^{ + }+{ Cl }^{ - } ,which species is an electron pair acceptor in this reaction? HCl H_{ 2 }O { H }_{ 3 }{ O }^{ + } { Cl }^{ - } 63 / 174 Most of air pollution is caused by: The burning of fossil fuels Ozone CO Acid rain 64 / 174 Pitch is produced by: Coal Petroleum Coal tar Coal gas 65 / 174 Which of the following process is reduction in nature? Grinding Smelting Roasting Floatation 66 / 174 Which of the following acids is used in the manufacturing of many chemicals, drugs, dyes, paints and explosives? { H }_{ 2 }S{ O }_{ 4 } { H }_{ 3 }P{ O }_{ 4 } HCl { HNO }_{ 3 } 67 / 174 At what pH does Phenolphthalein change its colour? 5.5 7 11 9 68 / 174 The volumetric ratio between hydrogen and oxygen in water is: 2:02 3:01 1:08 2:01 69 / 174 Which of the followings is not a waterborne disease? Dysentery Typhoid Anemia Hepatitis 70 / 174 Which of the following substance reacts with to produce ethyleneglycol? Acetylene Ethene Ethyne Ethane 71 / 174 Raffinose ({ C }_{ 18 }{ H }_{ 32 }{ O }_{ 16 }) on hydrolysis forms ______ simple sugars. Disaccharide Monosaccharide Trisaccharide Polysaccharide 72 / 174 Which of the following is a heterocyclic compound? Benzene Cyclohexane neo-pentane Pyridine 73 / 174 ____________ causes breathing difficulties, asthma and eye irritation. Methane Ozone CO CFCs 74 / 174 Active mass means ____________. Mass of substance in mole / { dm }^{ 3 } in dilute solution Total mass of products Total mass of reactants Both A and B 75 / 174 What will happen if [O{ H }^{ - }] increases? Solution becomes unpredictable Solution becomes acidic Solution becomes Neutral Solution becomes Basic 76 / 174 Which of the following diseases is caused due to the deficiency of vitamin-A? Rickets Night blindness Scurvy Anaemia 77 / 174 When H^{ + } < 1 × 10^{ -7 } M, then solution will be: Acidic Neutral Basic Amphoteric 78 / 174 Which of the following is a heterocyclic compound? Cyclohexane Thiophene Cyclopentene Benzene 79 / 174 A double arrow (rightleftharpoons ) indicates. Reversible reaction Reverse reaction Irreversible reaction Forward reaction 80 / 174 Which of following reacts with concentrated alkaline KMn{ O }_{ 4 } to produce oxalic acid? Ethene Ethyne Ethane Ethanol 81 / 174 { K }_{ w } is called ionization constant of water. Its value can be obtained by: Multiplying { H }^{ + } and { OH }^{ - } Adding { H }^{ + } and { OH }^{ - } Multiplying { H }^{ + } 𝑎𝑛𝑑 { H }_{ 2 }O Dividing { H }^{ + } and { OH }^{ - } 82 / 174 Which product is obtained when chloromethane (or methyl chloride) is reduced? Ethene Ethyne Ethane Methane 83 / 174 Ice floats over liquid water because: Its temperature is less than water Its density is less than water Its mass is less than water Its volume is less than water 84 / 174 Which of the following acids is found in Butter? Caproic Acid Stearic Acid Palmitic Acid Oleic Acid 85 / 174 The functional group of Amines is −N{ H }_{ 2 } −OH −CHO −COOH 86 / 174 For which reaction Kc has NO units? PC{ l }_{ 5 }\rightleftharpoons PCl_{ 3 }+{ Cl }_{ 2 } 2ICl\rightleftharpoons I_{ 2 }+{ Cl }_{ 2 } 2N{ O }_{ 2 }\rightleftharpoons { N }_{ 2 }{ O }_{ 4 } { N }_{ 2 }+3{ H }_{ 2 }\rightleftharpoons 2N{ H }_{ 3 } 87 / 174 Which of the following layers contains ozone gas? Thermosphere Stratosphere Mesosphere Troposphere 88 / 174 Which compound has two halogen atoms on adjacent carbon atoms? Ether Vicinal dihalide Ester Alkyle halide 89 / 174 Formic acid contains functional group: −OH −COOH −CHO −CO− 90 / 174 Which of the following is NOT a water-borne disease? Typhoid Anaemia Hepatitis Dysentery 91 / 174 Sulphur Trioxide is prepared according to the following reaction:2SO_{ 2(g) }+O_{ 2(g) }\rightleftharpoons 2S{ O }_{ 3(g) }The condition of this reaction is: V_{ 2 }O_{ 5 } ⁄ 450^{ O }C, 200atm Fe ⁄ 400^{ O }C, 200atm Electric / Spark Ni ⁄ 450^{ O }C, 200atm 92 / 174 n-pentane: iso-pentane and neo pentane are having different: Number of H-atoms Structures Molecular formulas Molecular masses 93 / 174 Which compound is not a saturated hydrocarbon? CH_{ 3 }-CH=C{ H }_{ 2 } CH_{ 4 } CH_{ 3 }-CH_{ 3 } CH_{ 3 }-C{ H }_{ 2 }-C{ H }_{ 3 } 94 / 174 Which one is not an air pollutant? O_{ 3 } N_{ 2 } NO_{ 2 } CO 95 / 174 Which of the following cannot be classified as Arrhenius acid? { { H }_{ 2 }SO }_{ 4 } { { H }_{ 2 }CO }_{ 3 } { CO }_{ 2 } { HNO }_{ 3 } 96 / 174 The unit of Kc for a reaction with equal number of moles of reactants & products is: { mol }^{ 2 }.{ dm }^{ -6 } { mol }.{ dm }^{ -3 } None of these { mol }.{ dm }^{ 3 } 97 / 174 Which of the following Salts causes temporary hardness in water? Magnesium Hydrogen carbonate Both calcium sulphate and magnesium sulphate Magnesium sulphate Calcium sulphate 98 / 174 Kwashiorkor is a disease caused by an extreme lack of: Mineral Protein Carbohydrate Fats 99 / 174 At equilibrium state of a reversible reaction: Concentration of reactants and products become constant. Concentrations of the reactants become zero Forward and reverse reactions are stopped Concentrations of reactants and products become equal 100 / 174 Green colour in firework is produced by the use of: (Example 10.4 P-35) Ba{ (OH })_{ 2 } BaCO_{ 3 } Ba{ (NO }_{ 3 })_{ 2 } BaSO_{ 4 } 101 / 174 Which of the following is evolved during the ripening of fruits and vegetables? Ethene Ethanal Methane Ethane 102 / 174 The pH of Lemon juice is ‘2’. The { H }^{ + } ion concentration { H }^{ + } in the lemon juice is: { 10 }^{ -2 }M { 10 }^{ 2 }M 2.0 M 0.2 M 103 / 174 Which is used for dehydrohalogenation of Alkyl halides? { Br_{ 2 } } water Alcoholic KOH Conc. { { H }_{ 2 }SO }_{ 4 } { Al_{ 2 }{ O }_{ 3 } } 104 / 174 ___________ is used to make rectified spirit by fermentation process Glucose Starch Cellulose Sucrose 105 / 174 The reduction of alkyl halides takes place in the presence of: Zinc + Dust Zn + HCl { Al }_{ 2 }{ O }_{ 3 } at 350^{ O }C Conc. H_{ 2 }S{ O }_{ 4 } at 170^{ O }C 106 / 174 What is the percentage of Nitrogen in Ammonium sulphate { (NH }_{ 4 })_{ 2 }{ SO }_{ 4 }? 21.20% 35% 40% 46.60% 107 / 174 Chalcopyrite is the ore of: Aluminium Iron Copper Chromium 108 / 174 What is the unit of equilibrium constant for N_{ 2(g) }+O_{ 2(g) }rightleftharpoons 2N{ O }_{ (g) }? mol.{ dm }^{ -3 } No units { dm }^{ 3 }.{ mol }^{ -1 } { mol }^{ 2 }.{ dm }^{ -6 } 109 / 174 Formic acid contains functional group: −COOH −OH −CO− −CHO 110 / 174 Colour of methyl red in solution of pH=9 is: Red Blue Pink Yellow 111 / 174 Which is reddish brown gas? { NO }_{ 2 } { SO }_{ 2 } NO { O }_{ 3 } 112 / 174 The separation of mineral from gangue is called concentration. Which of the following methods is used for concentration? Roasting Flotation Refining Smelting 113 / 174 Which of the following is a Lewis acid? O{ H }^{ - } N{ H }_{ 3 } { F }^{ - } B{ F }_{ 3 } 114 / 174 Which of the following is the chemical formula of Gypsum? CaS{ O }_{ 4 }.{ 2H }_{ 2 }O CaC{ O }_{ 3 } CaS{ O }_{ 4 } MgS{ O }_{ 4 }.{ H }_{ 2 }O 115 / 174 The gastric juice has pH= 1 It means a ___________________ solution. Slightly basic Slightly acidic Strongly basic Strongly acidic 116 / 174 Which process produces an Alkane? Hydrogenation Dehydration Combustion Hydration 117 / 174 The atmospheric layer that has the temperature range of −5 °C to −93°C is: Stratosphere Troposphere Thermosphere Mesosphere 118 / 174 Stem "But" stands for how many carbon atoms? 4 3 7 2 119 / 174 Halite is an ore of: Copper Iron Zinc Sodium 120 / 174 Which of the following does not happen, when a system is at equilibrium state? Concentration of reactants and products stop changing Forward and reverse reactions stop Forward and reverse reactions occur at same rate Reaction continues to occur in both the directions 121 / 174 In which of the following hydrocarbons, oxygen is attached to two alkyl groups? Ketones Aldehydes Ethers Esters 122 / 174 Which one of the followings is insoluble in water? Ca(HC{ O }_{ 3 })_{ 2 } NaHCO_{ 3 } CaCO_{ 3 } { Na }_{ 2 }CO_{ 3 } 123 / 174 In an irreversible reaction equilibrium is: Never established Established when reaction stops Established slowly Established quickly 124 / 174 If an alkane is having '5’ carbon atoms then the number of Hydrogen atoms in this alkane will be: 12 5 15 10 125 / 174 Which of the following is a Lewis base? { F }^{ - } B{ F }_{ 3 } HCl AlCl_{ 3 } 126 / 174 Hydrogen is added to Propene according to the following equation:C{ H }_{ 3 }CH={ CH }_{ 2 }+{ H }_{ 2 }x\rightarrow { 200-300^{ O }C } { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 3 }Which of the following catalysts is used for this reaction? Pt Zn Ni Zn/{ HCl }_{ (aq) } 127 / 174 The density of water is maximum at: 100 °C 0 °C 4 °C -4 °C 128 / 174 In the following reaction which species is donating an electron pair?{ NH }_{ 3 }+{ BF }_{ 3 }rightarrow { H }_{ 3 }N-{ BF }_{ 3 } H B{ F }_{ 3 } N B 129 / 174 Which product is obtained when chloromethane is reduced? Ethane Ethyne Ethene Methane 130 / 174 Which of the following causes brain damage in children? { SO_{ 2 } } Ozone Lead compounds { CO_{ 2 } } 131 / 174 Which of the following is an aldehyde? { CH }_{ 3 }COOH { CH }_{ 3 }{ CH }_{ 2 }CHO { CH }_{ 3 }{ COCH }_{ 3 } { C }_{ 6 }{ H }_{ 5 }OH 132 / 174 Phenol gives _______ ppt with bromine water. White Green Red Black 133 / 174 Raffinose ({ C }_{ 18 }{ H }_{ 32 }{ O }_{ 16 }) is a: Trisaccharide Monosaccharide Polysaccharide Disaccharide 134 / 174 Fehling’s solution is used to determine the presence of: Ketone Alcohol Phenol Aldehyde and Ketone 135 / 174 Complete the following reaction:CH\equiv CH+{ H }_{ 2 }\xrightarrow [ Ni ]{ 200-300^{ O }C } _____________ C{ H }_{ 3 }-C{ H }_{ 3 } C{ H }_{ 2 }=C{ H }_{ 2 } C{ H }_{ 2 }-C{ H }_{ 2 } C{ H }_{ 2 }\equiv C{ H }_{ 2 } 136 / 174 In the given reaction which species is donating an electron pair?{ NH }_{ 3 }+{ BF }_{ 3 }\rightarrow { H }_{ 3 }N-{ BF }_{ 3 } H B N { BF }_{ 3 } 137 / 174 __________ is used for artificial ripening of fruits. Acetylene Benzene Ethylene Methanol 138 / 174 The disease caused due to the deficiency of Vitamin D is: Hemolysis of Red blood cells Rickets Scurvy Night blindness 139 / 174 The general formula for Amines is: R - NH R-NH_{ 2 } R-NH_{ 4 } R-NH_{ 3 } 140 / 174 Which of the following is used for dehydrohalogenation of alkyl halides? Alcoholic KOH Conc. { { H }_{ 2 }SO }_{ 4 } { Br_{ 2 } } water { Al_{ 2 }{ O }_{ 3 } } 141 / 174 Which of the following reaction will not have any units for 𝐾𝑐? 2A_{ (g) }+B_{ (g) }\rightleftharpoons 3AC_{ (g) } N_{ 2(g) }+O_{ 2(g) }\rightleftharpoons 2N{ O }_{ (g) } All of these { H }_{ 2(g) }+C_{ 2(g) }\rightleftharpoons { H }_{ 2 }{ O }_{ (g) }+C{ O }_{ 2(g) } 142 / 174 Glucose is: Tetrose Hexose Disaccharides Pentose 143 / 174 The substance which fight against diseases in living organisms are: Lipids Carbohydrates Proteins Enzymes 144 / 174 Raffinose produces ______ units of simple sugars when hydrolyzed. 5 4 2 3 145 / 174 What are the units of Kc for { N }_{ 2(g) }+{ O }_{ 2(g) }\rightleftharpoons 2{ N }_{ 2(g) } ? No units { dm }^{ 3 }.{ mol }^{ -1 } { mol }^{ 2 }.{ dm }^{ -6 } { mol } { dm }^{ -3 } 146 / 174 What is the colour of methyl red in basic solution? Red Orange Pink Yellow 147 / 174 On boiling temporary hard water, the substance which is settled down is: Ca(HC{ O }_{ 3 })_{ 2 } CaCO_{ 3 } CaCl_{ 2 } Mg(HC{ O }_{ 3 })_{ 2 } 148 / 174 Which of the following is responsible for acid rain? CO { SO_{ 2 } } { O_{ 3 } } { CH_{ 4 } } 149 / 174 Which human activity results in contamination of water bodies? All of these Pesticides Septic tanks Livestock waste 150 / 174 Which of the following is not a water borne disease? Typhoid Anemia Hepatitis Dysentery 151 / 174 Disorders of Red blood cells is caused due to the deficiency of: Vitamin K Vitamin A Vitamin D Vitamin E 152 / 174 A drain cleaner solution contains 1.0 × { 10 }^{ -8 }M, { OH }^{ - } concentration. This solution is: Acidic Basic Cannot be predicted Neutral 153 / 174 The general formula of alkynes is: C_{ n }{ H }_{ 2n-1 } C_{ n }{ H }_{ 2n-2 } C_{ n }{ H }_{ 2n+2 } C_{ n }{ H }_{ 2n } 154 / 174 Which of the following is a water soluble vitamin? Vitamin B Vitamin D Vitamin A Vitamin K 155 / 174 __________ is used to manufacture urea fertilizer. Ethane Methane Ethyne Ethene 156 / 174 Which of the following is used as Antacid? Ca{ (OH) }_{ 2 } Mg{ (OH) }_{ 2 } NaOH KOH 157 / 174 What happens when ammonium carbamate is distilled with steam? Carbon dioxide is produced Ammonium hydroxide is produced Ammonia is produced Urea solution is produced 158 / 174 Which is used for dehydro-halogenation? { Al_{ 2 }{ O }_{ 3 } } Alcoholic KOH Bromine water Conc. { { H }_{ 2 }SO }_{ 4 } 159 / 174 What is the unit of equilibrium constant for{ N }_{ 2 }+{ O }_{ 2 }\rightleftharpoons 2N{ O }_{ 2 } { dm }^{ 3 }.{ mol }^{ -1 } No units { mol }^{ 2 }.{ dm }^{ -6 } { mol }.{ dm }^{ 3 } 160 / 174 Galena is the ore of _________ metal. Zinc Mercury Lead Aluminium 161 / 174 Which of the following is used as jet fuel? Fuel oil Lubricating oil Diesel oil Kerosene oil 162 / 174 What per cent of alkaline aqueous solution of KMnO_{ 4 } is used to detect the presence of an Alkene? 0.01% 0.10% 1% 0.00% 163 / 174 Identify molecule produced when electrical discharges pass through oxygen in air: { O }_{ 2 } \frac { 1 }{ 2 } { O }_{ 2 } { O }_{ 4 } { O }_{ 3 } 164 / 174 Formic acid contains _______ functional group. −CO− −CHO −OH −COOH 165 / 174 Which process produces an alkane? Combustion Dehydration Hydration Hydrogenation 166 / 174 What is the chemical formula of slaked lime? { Ca(OH })_{ 2 } { CaCl }_{ 2 } { CaCO }_{ 3 } CaO 167 / 174 By dehydration, we mean the removal of: Water Halogen Hydrogen Hydrogen Halide 168 / 174 The formula of Halite is: NaCl SiO_{ 2 } PbS ZnS 169 / 174 The word vitamin was first used by: Francis Crick C. Eijkman Casmir Funk F.G. Hopkins 170 / 174 Percentage of nitrogen in urea is: 35 80 21.2 46.6 171 / 174 What is the colour of phenolphthalein in acidic medium? Pink Orange Red Colourless 172 / 174 The general formula of alkane is: C_{ n }{ H }_{ 2n } C_{ n }{ H }_{ 2n+2 } C_{ n }{ H }_{ 2n+1 } C_{ n }{ H }_{ 2n+3 } 173 / 174 _________ is used to make liquid soap and shaving cream. NaOH Mg{ (OH) }_{ 2 } KOH Ca{ (OH) }_{ 2 } 174 / 174 Raffinose ({ C }_{ 18 }{ H }_{ 32 }{ O }_{ 16 }) on hydrolysis forms ______ simple sugars. 2 3 to 9 3 1 Your score is LinkedIn Facebook Twitter 0% Restart quiz Send feedback Submit a Comment Cancel replyYou must be logged in to post a comment.
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