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.	Catalytic oxidation of benzyl alcohol gives
Answer» benzaldehyde BENZOIC ACID TOLUENE phenol ANSWER :A

2.	Catalytichydrogenation of natural rubber gives
Answer» syn diotacticproduct atactic product ISOTACTIC product NONE of these Solution :Sincein natural RUBBER methyl groupsare randomly ORIENTED , therefore , in the HYDROGENATION , they arerandomly oriented and henceatactic polymerresults .

3.	Catalytic hydrogenation of methyl 2-methyl propanoate gives
Answer» ANSWER :B

4.	Catalytic hydrogenation of ketones gives 2^@ alcohol
Answer» ANSWER :T

5.	What is catalytic dehydrogenation of alcohols ?
Answer» ANSWER :T

6.	Catalytic hydrogenation of benzene gives
Answer» Xylene Cyclohexane Benzoic ACID Toluene Solution :

7.	Catalytic dehydrogenation of methyl cyclohexane, obtained from petroleum, gives a liquid which on treatment with chlorosulphonic acid at 370 K ylelds a mixture of two isomers (A) and (B), C_(7)H_(7)SO_(2)CI. The major isomer (A) reacts with ammonia to form (C), which on oxidation with permanganate gives compound (D), On heating, compound (D) gives a well known sweetening agent (E). The minor isomer (B) also reacts with ammonia to give a compound (F) which on treatment with NaOCI/NaOH gives an antiseptic (G). Compound (F) on reaction with NaOCI//Cl_(2) (excess) and fotlowed by oxidation gives a compound (H) used for sterilising drinking water Identify (A) lo (H).
Answer» SOLUTION :

8.	Catalytic dehydrogenation of n-heptane in presence of Cr_2O_3//Al_2O_3 at 750 K gives
Answer» Iso-heptane 1-heptane Toluene 2,3-dimethylpentene-1 Solution :

9.	Catalytic dehydrogenation of a primary alcohol gives a
Answer» ketone ester secondary alcohol ALDEHYDE Solution :A PRIMARY alcohol loses hydrogen and forms an aldehyde. `RCH_(2)OHunderset(300^(@)C)OVERSET(Cu)toRCHO+H_(2)`

10.	Catalytic dehydration of ethanol at 413 K gives
Answer» ethene ethoxy ethane ethane epoxy ethane Answer :B

11.	Catalyticdecompositionofphoshineonhottungsten at highpressureis_______ reaction .
Answer» PSEUDO`1^(st)` ORDER `2^(nd)`order `1^(st)`order ZERO order Answer :D

12.	Catalytic action of an enzyme is
Answer» HIGHLY specific NON specific Does not depend on nature of substrate Common for many BIOCHEMICAL reactions Answer :A

13.	The catalyst used in the manufacture of sulphuric acid by contact process is
Answer» `NO(G)` `V_2O_5` `MO` Platinised ASBESTOS Solution :`V_2O_5` (or) Platinised asbestos

14.	Catalyst used in the polymerisation of ethylene is
Answer» `Ag` `O_(2)` `Ni` `Pd+BaSO_(4)` Answer :B

15.	The catalyst used in the manufacture of nitric acid by Ostwald process is:
Answer» SOLUTION :`90%` PT + `10%` RH

16.	Explain Rosenmund’s reduction with an example.
Answer» `HgSO_4` ANHYDROUS `AlCl_3` anhydrous ` ZnCl_2` `Pd//BaSO_4` ANSWER :B

17.	Catalyst used in Rosenmund reduction is :
Answer» `Pd//BaSO_(4)` Zn-Hg couple `Li[AlH_(4)]` `H_(2)//Ni` Answer :A

18.	Catalyst used in dimerization of acetylene to prepare chloropene is:
Answer» `HgSO_4 + h_2so_4` `Cu_2Cl_2` `Cu_2Cl_2 +NH_4Cl` `Cu_2Cl_2 + NH_OH` ANSWER :C

19.	Catalyst used in preparation of CH_(3)COOH is.....
Answer» `NI//Pt` `H_(2)//Ni` `[RH(CO)_(2)I_(2)]^(-)` `MO(IV)` Solution :`[Rh(CO)_(2)I_(2)]^(-)`

20.	Catalyst used in Kjeldahl's method for theestimation of nitrogen is :
Answer» SODIUM MAGNESIUM MERCURY COPPER SOLUTION :N//A

21.	Catalyst used in Deacon's process is …………………….. .
Answer» `CuCl_(2)`<BR>`Cu_(2)Cl_(2)` `CuBr_(2)` `Cu_(2)Br_(2)` SOLUTION :`Cu_(2)Cl_(2)`

22.	Catalyst in the Ostwald's process is
Answer» Pt FE `V_(2)O_(5)` Ni Answer :1

23.	Catalyst in a reaction
Answer» Lowers the activation ENERGY Increases the RATE of reaction Both (a) and (b) Initiates the reaction SOLUTION :A catalyst lowers the activation energy both of FORWARD and backward reaction and increase the rate of reaction .

24.	Catalyst have no effect on the equilibrium constant. Why?
Answer» Solution :In a reversible reaction under equilibrium, a catalyst INCREASES the SPEEDS of both the forward and backward reactions to the same extent. THEREFORE, it has no EFFECT on the equilibrium constant or it does not alter or change the equilibrium constant in a reaction.

25.	Catalyst for Deacon.s process
Answer» `CuCl_(2)` `Fe_(2)O_(3)` `V_(2)O_(5)` NO ANSWER :A

26.	Catalyst commonly used in free radical polymerisation is
Answer» `MnCl_2` ` FE -MO` ` R- CO-O-R ` ` R-O-O-R` ANSWER :D

27.	Catabolism and anabolism are collectively known as _____.
Answer» ANSWER :METABOLISM

28.	Castner Kellner cell is used for the manufacture of :
Answer» SODIUM hydroxide Sodium carbonate Magnesium chloride Sodium metal Answer :A

29.	Cast iron is not used in ..........
Answer» Anchors STOVES Railways PIPES of GUTTER Solution :Wrought iron is USED in anchors.

30.	Cast iron is manufactured by remelting:
Answer» PIG IRON and POURING into moulds Steel and pouring into moulds Wrought iron and pouring into moulds Answer :A

31.	Cast iron is made by melting………….with scrap iron and coke using hot air blast.
Answer» SOLUTION :PIG IRON

32.	Cast iron is made by melting
Answer» pig IRON with zinc pig iron with SCRAP iron and tin pig iron with scrap iron and coke pig iron with lead and zinc Solution :Cast iron CONTAIN 4% carbon

33.	Cast iron is harder than pure iron . Why ?
Answer» SOLUTION :Because PERCENTAGE of carbon in CAST iron is 2.5 to `5%.`

34.	Cast iron is hard but pure iron is soft in nature. Explain why ?
Answer» Solution :CAST iron CONTAINS 2.5 to 5% carbon which makes cast iron hard.

35.	Cast iron is
Answer» made by melting pig IRON with scrap iron and coke using hot air blast having slightly lower carbon content (about 3%) as compared to pig iron EXTREMELY HARD and BRITTLE All of the above statements are true Solution :Cast iron is DIFFERENT from pig iron and is made by melting pig iron with scrap iron and coke using hot air blast. It has slightly lower carbon content (about 3%) and is extremely hard and brittle.

36.	Cassiterite ore is used to extract
Answer» Fe Sn Au Pb Answer :B

37.	Cassiterite one is used to extract
Answer» Fe Sn Au Pb Answer :B

38.	Cassiterite is an ore of:
Answer» Mn Ni Sb Sn Answer :D

39.	Cassiterite is an ore of :
Answer» Mn Ni Sb Sn. Solution :CASSITERITE `(SnO_(2))` is an ORE of TIN.

40.	CaSO_(4) in insoluble but is not preciplated when excess of (NH_(4))_(2)SO_(4) is added to CaCI_(2) explain
Answer» SOLUTION :`CaSO_(4)+(NH_(4))_(2) SO_(4) RARR (NH_(4))_(2)[CA(SO_(4))_(2)]`

41.	Caslculate the magnetic moments of Fe^(2+) and Fe^(3+)
Answer» Solution :`FE^(2+)`, there are 4 unpaired electrons `mu= SQRT(4(4 + 2)) = sqrt(4xx6) =sqrt24 = 4.89 B.M` In `Fe^(3+)` there are 5 unpaired electrons. `mu = sqrt(5(5+2)) = sqrt(5xx7)=sqrt135 =5.91 B.M`

42.	Cartisone is a molecular substance containing 21 atoms of carbon per molecule. The mass percentage of carbon in cartisone is 69.98%. What is the molecular mass of cartisone?
Answer» 360.4 176.5 287.6 312.8 Answer :A

43.	Carry out the following conversions : (i) Propanoic acid to 2-Bromopropanoic acid. (ii) Benzoyl chloride to benzaldehyde.
Answer» Solution :(i) Propanoic ACID to 2-bromopropanoic acid `CH_(3)CH_(2)COOHoverset(Br_(2)//"Red P")(to)UNDERSET("2-Bromopropanoic acid")(CH_(3)-underset(Br)underset(\|)(CH)-COOH)` (II) Benzoyl chloride to benzaldehyde

44.	Caro.s acid is:
Answer» `H_2S_2O_3` `H_2S_2O_8` `H_2SO_3` `H_2SO_5` ANSWER :D

45.	Carnallite is a mineral of :
Answer» Ca Na Mg Zn Answer :C

46.	Carnallite is :
Answer» `KCl.MgCl_(2).6H_(2)O` `Na_(3)AlF_(6)` `Ca_(2)B_(6)O_(11).2H_(2)O` `Ca_(2)Mg_(2)Si_(8)O_(22)(OH)_(2)` Answer :A

47.	Carnalite is presentin seawater mainly. It isthe main ore of magnesium which has thechemicaklfromulaMgCl_(2).KCl.xH_(2)O . Thevalue of x is .
Answer» ANSWER :6

48.	Carius method is used for the estimation of :
Answer» N C and H P Halogen Answer :D

49.	Carnalite isdouble chloride of potassium andmagnesium containing 38.86% of waster . 0 . 458 g of it gave 0 . 71 g of AgCl and 0.666 g ofgave 0 . 27G Mg_(2)P_(2)O_(7). Find the percentageof KCl in the camalite
Answer» ANSWER :`26 - 46%`

50.	Care sugar gives red color with Fehling.s solution.(True/False)
Answer» Answer :GLUCOSE GIVES RED COLOUR with Fehling.s SOLUTION.