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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 20051. |
The reduction potential of hydrogen half cell will be negative if : |
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Answer» `p(H_(2))=1" ATM and" [H^(+)]=2.0 M` `=0-(0.0591)/(2)"log"(pH_(2))/([H^(+)]^(2))` `E_(CEEL)` will be NEGATIVE when `pH_(2) gt [H^(+)]`. |
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| 20052. |
To get DDT chlorobenzene has to react with the following compound in the presence of concentrated sulphuric acid |
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Answer» dichloro acetaldehyde 
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| 20053. |
Whichof thefollowingcompoundscontainsmostacidichydrogen? |
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Answer» `CH_2 = CH_2 ` |
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| 20054. |
Which one of the following compounds would have the highest heat of hydrogenation ? |
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Answer» `CH_(2)=CH_(2)` |
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| 20055. |
Which of the following is not antibiotic |
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Answer» Tetracycline |
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| 20056. |
Which complex ion is formed when undecomposed AgBr is washed with hypo solution in photography? |
| Answer» Solution :`AgBr + 2Na_2 S_2 O_3 to Na_3 [AG(S_2 O_3)_2] + Na BR` | |
| 20057. |
Which is involved in digestion process |
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Answer» HBr |
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| 20058. |
Treatment of ammonia with excess alkyl halide gives |
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Answer» triethyl AMINE |
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| 20059. |
Which statement(s) about the behaviour of a real gas is (are) wrong? |
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Answer» A GAS EXERTS more pressure compared to an ideal gas |
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| 20060. |
Which of the following is best method to prepare phenyl t-butyl ether : |
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Answer» `(CH_(3))_(3)C-O^(-)NA^(+)+C_(6)H_5Br` 
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| 20061. |
Which of the following complexes are polymerisation isomers ? |
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Answer»
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| 20062. |
When one mole of the given compond reacts with sodium metal then how many moles of H_(2) gas will release ? |
| Answer» Solution :N//A | |
| 20063. |
Which of the following is nucleophile ? |
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Answer» `OH^-` |
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| 20064. |
When HB adds on hex-1-ene in the presence of benzoyl peroxide, the product is |
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Answer» 2-bromohexane |
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| 20065. |
When 1 mole of [Co(NH_3)_3Cl_3] is added to excess of AgNO_3 solution the weight of AgCl precipitated is |
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Answer» 13.5 g |
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| 20066. |
What must be the velocity of a beam of electrons if they are to display a de- Broglie wavelength of 100Å? |
| Answer» SOLUTION :`7.25 XX 10^4 MS^(-1)` | |
| 20067. |
Write the structures of the following organic halogen compounds.2-Bromobutane |
Answer» SOLUTION :
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| 20068. |
Two organic compounds (A) and (B) with molecular formula, C_(3)H_(6)O, react with HCN in different manner to produce (C) and (D) respectively. On subsequent hydrolysis of (C) and (D) gives optically active substances (E) and (F). Both (E) and (F) on decarboxylation give propan -1-ol. What are (A),(B) (C),(E)and (F)? |
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Answer» Solution : (A) `CH_(3)CH_(2)CHO,(B)H_(2)C=CH_(2)OH,(C)CH_(3)CH_(2)CH(OH)CN,(D)CH_(3)-CH(CN)CH_(2)OH,` `CH_(3)CH_(2)underset("Opitcally active")overset(**)(CH(OH))COOH,(F)CH_(3)-underset("Optically active")overset(**)(CH(COOH))CH_(2)OH` |
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| 20069. |
Which catalyst is used in cumene process ? |
| Answer» Solution :`H_(3)PO_(4)` | |
| 20071. |
Which one of the following pairs of atoms/atom-ions have identical ground state configuration ? |
| Answer» Answer :B | |
| 20072. |
What is a electro chemical cell? |
| Answer» SOLUTION :Electrochemical cell is a device which interconverts chemical into electrical energy and vice versa. It consists of two SEPARATE ELECTRODES which are in contact with an ELECTROLYTE solution. | |
| 20073. |
Two gases A and B are in a container. The experimental rate law for the reaction between them has been found to be rate =k[A]^(2)[B}. Predict the effect on the rate of the reaction when the partial pressure of each reactant is doubled. |
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Answer» the RATE is doubled |
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| 20074. |
Write simplest ratio of Co^(3+) : NH_(3) : NO_(2)^(-) in : tetraamminedintrito N-cobalt(III)diamminetrtranitrito-N-cobaltate(III) |
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Answer» `[Co(NH_(3))_(4)(NO_(2))_(2)][Co(NH_(3))_(2)(NO_(2))_(4)]` So ratio of `Co^(3+) : NH_(3):NO_(2)^(-)` is `1:2:3`. |
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| 20075. |
When CH_2=CH-COOHis reduced with LiAIH_4 The compound obtained will be |
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Answer» `CH_2 = CH- CH_2-OH` |
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| 20076. |
Write down the products when following compounds are dehydrated: |
Answer» SOLUTION : 
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| 20077. |
The sky looks blue due to: |
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Answer» REFLECTION |
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| 20078. |
Which of the following is / are correct ? |
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Answer» Absolute ALCOHOL is 100 % ethanol |
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| 20079. |
Why carboxylic acids do not give the characteristic reactions of carbonyl group? |
Answer» Solution :Due to the PRESENCE of lone pairs of electrons on the OXYGEN atom of the OH group, the carboxylic acids may be regarded as a RESONANCE hybride of STRUCTURES (I and II):  Similarly, a carbonyl group of aldehydes and ketones may be regarded as a resonance HYBRID of structures (III and IV):  Due to contribution of structure (IV), the carbonyl carbon in aldehydes and ketones is electrolphilic. however, due to constribution of structure (II), the electrophilic character of carboxyl carbon is reduced. in other words, carbonyl carbon of carboxyl group is less electrophilic than carbonyl carbon in aldehydes and ketones and hence nucleophilic adition reactions (such as formation of oximes, hydrazones, phenylhydrazones, 2,4-dinitrophenylhydrazones and semicarbazones) of aldehydes and ketones do to take place with carboxylic acids. |
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| 20080. |
Which of the following is high spin complex ? |
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Answer» `[CoCl_(6)]^(3-)` |
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| 20081. |
What single isomer would be found in greatest yield when isopropyl chloride undergoes a Friedel-Crafts alkylation with t-butylbenzene ? |
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Answer» p-isopropyl-t-butylbenzene |
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| 20082. |
Write the strucuture and common name of 3 - phenylpropenal. |
Answer» SOLUTION :STRUCTURE of 3phenylpropenal is  Its COMMON NAME is CINNAMALDEHYDE. |
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| 20083. |
Which reagent can be used to convert a carboxylic acid chloride into a ketone ? |
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Answer» Chromic ACID |
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| 20084. |
Write the application of copper. |
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Answer» Solution :Copper is the first metal USED by the humans and extended USE of its alloy resulted in a new era,.Bronze age. Copper is used for MAKING coins and ornaments ALONG with gold and other metals. Copper and its ALLOYS are used for making wires,water pipes and other electrical parts. |
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| 20085. |
Which of the following is explosive ? |
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Answer» PICRIC acid |
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| 20087. |
Which of the hydrogen halides forms salts like KHX_2 (where X is a halogen atom) |
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Answer» HF |
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| 20089. |
What is the order of increasing vapour pressure of the following at room temperature ? Water, Suger solution in water , alcodol-water solution . |
| Answer» SOLUTION :V.P.of SUGER solution in WATER < V.P. of water < V.P. of alcohol-water solution . | |
| 20090. |
What is the name of element with atomic number 105 |
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Answer» Kurchatovium |
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| 20091. |
Which of the following oxides cannot be reduced to metal by carbon |
| Answer» Answer :B::D | |
| 20092. |
Which of the following acids is a vitamin ?s |
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Answer» Aspartic acid |
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| 20093. |
When an oxide of manganese (P) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (Q). Compound (Q) disproportionates in neutral or acidic solution to give purple compound ( R) oxidises potassium iodide solution to a compound (S) and compound (P) is also formed. Compounds P to S are |
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Answer» `{:(" "P," "Q," "R," "S),(MnO_4^(-),KIO_3,MnO_2,K_2MnO_4):}` `underset((P))(2KMnO_4)oversetDeltatounderset((Q))(K_2MnO_4)+2H_2O` `3MnO_4^(2-)+4H^(+)to underset((R))(2MnO_2)^(-)+MnO_2+2H_2O` |
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| 20094. |
Which of the following are intermediates in the reaction of excess of CH_(3) MgBr " with" C_(6)H_(5)COOC_(2)H_(5)to make 2 - phenyl -2- propanol ? A.C_(6)H_(5) - overset("OMgBr") overset(|) underset(CH_(3)) B. C_(6)H_(5) - overset(O) overset(||) - CH_(3) C. C_(6)H_(5) - overset("OMgBr") overset(|) underset(CH_(3)) underset(|) C- CH_(3) |
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Answer» A and B |
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| 20095. |
Which of the following expressions is correct in case of a CsCl unit cell (edge length, a) ? |
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Answer» rc + RA = a `CL^(-)to`at everycorner `2(rc +ra) = sqrt(3) ` a ( alongbodydiagonal) ` rc + ra = ( sqrt(3 )a)/(2)` `H2O+ CH3COOH hArrH3O^(+)+CH3COO^(-)` |
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| 20096. |
Using the bond enthalpy data given below, calculate the enthalpy change for the reaction. C_(2)H_(4) (g) + H_(2) (g) to C_(2) H_(6) (g) Data : {:("Bond" , C- C , C = C) , (, C-H , H - H):} Bond Enthalpy 336.81 kJ/mol 606.68 kJ/mol 410.87 kJ/mol 431.79 kJ/mol |
| Answer» SOLUTION :`-120.08` J/ml | |
| 20097. |
Why are powdered substabces more effective adsorbents than their crystalline froms? |
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Answer» |
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| 20098. |
Which are given by carbylamine reaction? |
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Answer» `CH_3NH_2` |
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| 20099. |
Which of the following alkanes cannot be prepared by Wurtz reaction ? |
| Answer» Solution :Methane cannot be prepared by Wurtz reaction. | |
| 20100. |
The vapour pressure of an aqueous solution of glucose is 750 mm of mercury at 100^@ C. Mole fraction of solute will be |
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Answer» 0.103 |
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