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.	Heroin is a derivative of:
Answer» morphine cocaine NICOTINE caffeine. Answer :A

2.	Head-to-tail addition takes place in chain-growth polymerisation, when monomer is
Answer» `CH_2 = CH - CH =CH_2` `CH_2 = UNDERSET(CH_3)underset(\|)C-underset(O)underset(\|\|)(COCH_3)` `CH_2=CH -C -=N` ANSWER :A

3.	Heaematite and tin stone are purified by …………
Answer» GRAVITY SEPARATION process Magnetic separation process Froth FLOATATION process Hand picking Answer :A

4.	Head-to-tail addition take palce in chain-growth polymerisation when monomer is
Answer» `CH_(2)=CH-CH=CH_(2)` `CH_(2)=UNDERSET(CH_(3))underset(\|)(C)-underset(O)underset(\|\|)(C)OCH_(3)` `CH_(2)=CH-C-=N` Solution :Vinyl derivatives containingelectron withdrawinggroup stabilises FREE radicaland READILY undergo HEAD to tail addition polymerisation .

5.	The number of moles of KI required to prepare one mole of K_(2)[HgI_(4)] is
Answer» 4 3 2 1 Answer :A

6.	The metal which can form cation having metal - metal bond
Answer» Mercury Copper Osmium Iron Answer :A

7.	Among the following which has higher electron affinity value
Answer» Iodine Chlorine Bromine Fluorine Answer :B

8.	heflashpointin indiaisfixedat :
Answer» 317K 308K 295.8K 303K Answer :A

9.	Heroin is a derivative of
Answer» Cocaine Morphine Caffeine Nicotine Answer :B

10.	HDPE is formed in the presenceof catalyst
Answer» PEROXIDE Ziegler-Natta `H_(2)//Ni` `Br_(2)//Ni` Solution :Ziegler-Natta catalyst is present in the formation of HDPE.

11.	Heroin is
Answer» NARCOTIC ANALGESIC NON narcotic analgsic antimalerial antiseptic Answer :A

12.	HDP is used in preparation of…………..
Answer» Light and soft devices HARD and DURABLE devices COTTON and WOOL Light and CHEAP devices Solution :Hard and durable devices

13.	Hereditary traits are carried by ______.
Answer» nucleic ACID PROTEIN lipid CARBOHYDRATE Solution :Nucleic acid

14.	HCOONa overset(350^(@))underset(Delta) to Gas(X) + Residue (Y)overset(CoCl_(3)) to "Complex" (Z) Choose the correct statement regarding (X).
Answer» It is paramagnetic Its bond order is ONE It can't ACT as `pi-acid` It is a POWERFUL OXIDISING agent. Answer :D

15.	HCOOHoverset(Conc.H_(2)SO_(4))rarrXuarr overset(X,HCl)underset(AlCl_(3))rarrY What is Y ?
Answer» SOLUTION :`H C COHoverset(Conc.H_(2)SO_(4))rarrCO+H_(2)O`

16.	Here the question contain statement given in two columns which have to be matched. Statements in Column I are lebelled as A, B, C and D, whereas statement in Column II are labelled as p, q, r and s. the answers are to these questions have to be appropriately bubbled as illustrated in the following example. If the correct match as a-p, A-s, B-q, B-r, C-p, C-q and D-p, their correctly labelled 4 xx 4 matrix should look like as under.
Answer» ANSWER :`(##DIN_OBJ_CHM_V02_C08_E01_480_A01##)`

17.	HCOONa overset(350^(@))underset(Delta) to Gas(X) + Residue (Y)overset(CoCl_(3)) to "Complex" (Z) Complex (Z) is:
Answer» an outer ORBITAL complex optically active oxidised when exposed to air paramagnetic Solution :`HCOONaunderset(Delta)overset(350^(@)C)rarrH_(2)(X)+NaC_(2)O_(4)(Y)overset(CoCl_(3))rarrNa_(3)[Co(C_(2)O_(4)](Z)` (i) `"GAS" (X) to H_(2)` -It is diamagnetic -B.O.=1 -It acts as `pi`-acid (into `sigma_(1s)^(**))` (ii) `Na_(3)[Co(C_(2)O_(4)]` `[M(AA)_(3)]` Optically active

18.	Here the reagent is
Answer» `Zn + NH_(4)Cl` `Zn + NAOH` `Sn + HCL` `LiAlH_(4)` ANSWER :C

19.	HCOONa underset(heat)to X+H_(2). X is
Answer» `Na_(2)CO_(3)` `CO_(2)` `(COONA)_(2)` CO Answer :C

20.	Here the question contain statement given in two columns which have to be matched. Statements in Column I are lebelled as A, B, C and D, whereas statement in Column II are labelled as p, q, r and s. the answers are to these questions have to be appropriately bubbled as illustrated in the following example. If the correct match as a-p, A-s, B-q, B-r, C-p, C-q and D-p, their correctly labelled 4 xx 4 matrix should look like as under.
Answer» ANSWER :`(##DIN_OBJ_CHM_V02_C08_E01_479_A01##)`

21.	HCOOHand CH_(3)COOH can be distinguished by
Answer» Tollen's reagent FEHLING's solution `KMnO_(4)` `NaHCO_(3)` Solution :(a) `HCOOH` GIVES silver mirror with Tollen's reagent, acetic acid does not. (b) `HCOOH` form red pptwith Fehling's solution,acetic acid does not. (c ) `HCOOH`decolouries `KMnO_(4)` but acetic and does not. (d) Both REACT with `NaHCO_(3) :.` (d) is not.

22.	HCOOH reacts wihth conc. H_(2)SO_(4) to produce
Answer» CO `CO_2` NO `NO_2` ANSWER :A

23.	Here the question contain statement given in two columns which have to be matched. Statements in Column I are lebelled as A, B, C and D, whereas statement in Column II are labelled as p, q, r and s. the answers are to these questions have to be appropriately bubbled as illustrated in the following example. If the correct match as a-p, A-s, B-q, B-r, C-p, C-q and D-p, their correctly labelled 4 xx 4 matrix should look like as under.
Answer» Answer :(A)-R (B)-s (C)-p (D)-Q

24.	HCOOH shows all tests of aldehyde because
Answer» It has ONE ALDEHYDE group It is member of aldehyde All ACIDS show tests of aldehyde Does not show any test Answer :A

25.	Here the question contain statement given in two columns which have to be matched. Statements in Column I are lebelled as A, B, C and D, whereas statement in Column II are labelled as p, q, r and s. the answers are to these questions have to be appropriately bubbled as illustrated in the following example. If the correct match as a-p, A-s, B-q, B-r, C-p, C-q and D-p, their correctly labelled 4 xx 4 matrix should look like as under.
Answer» <P> Answer :(A)-p, q, s, t (B)-p, QS, t, c-p, q, (D)-R

26.	HCOOC - (CH_2)_5 - COOH overset(Ca(OH)_2//Delta)to X. Compound X is
Answer» ANSWER :A

27.	Here the question contain statement given in two columns which have to be matched. Statements in Column I are lebelled as A, B, C and D, whereas statement in Column II are labelled as p, q, r and s. the answers are to these questions have to be appropriately bubbled as illustrated in the following example. If the correct match as a-p, A-s, B-q, B-r, C-p, C-q and D-p, their correctly labelled 4 xx 4 matrix should look like as under.
Answer» <P> ANSWER :(A)-p,s (B)-p, s (C)-r (D)-p, q, s

28.	HCO_3^- contains carbon in the oxidation state :
Answer» `+5` `+1` `+4` `+6` ANSWER :C

29.	HCNoverset("Hydrolysis")rarracid -1 CH_(3)C Cl_(3)overset("Hydrolysis")rarr acid-2 The heat of ionisation of HCN and acid-2 respectivley are x kcal and y kcal [x lt y]. The order of their pK_(a) values will be
Answer» `(pK_(a))_(HCN)gt(pK_(a))_("acid-2")` `(pK_(a))_(HCN(=(pK_(a))_("acid-2")` `(pK_(a))_(HCN)lt(pK_(a))_("acid-2")` All of the above Solution :Acid-2 is ACETIC acid. HCN is a weaker acid as its HEAT of inoisation is LESS than acetic acid. Hence, `(pK_(a))_(HCN)gt(pK_(a))_("acid-2")`

30.	Here the question contain statement given in two columns which have to be matched. Statements in Column I are lebelled as A, B, C and D, whereas statement in Column II are labelled as p, q, r and s. the answers are to these questions have to be appropriately bubbled as illustrated in the following example. If the correct match as a-p, A-s, B-q, B-r, C-p, C-q and D-p, their correctly labelled 4 xx 4 matrix should look like as under.
Answer» ANSWER :(A)-r, s (B)-p, Q (C)-p, q (D) -p, s

31.	HCN+H_(2)Orarr[X]+NH_(3), [X]rarr[Y]+H_(2)O (Unbalanced equations) [Y] May be prepared by which one of the following methods?
Answer» By DEHYDRATION of Malonic acid with `P_(2)O_(5)` By THERMAL decomposition of carbon sub - OXIDE in air. By heating potassium hexacyanoferrate (II) with CONC. `H_(2)SO_(4)` By the action of conc. `HNO_(3)` on charcoal. Answer :C

32.	Here the product ‘X’ is
Answer» ANSWER :B

33.	HCN and HNC are :
Answer» METAMERS Functional Position isomers Chain isomers Answer :B

34.	Here P is/are :
Answer» All of these Solution :This is an EXAMPLE of NUCLEOPHILIC substitution. Since phenoxide ion is an AMBIDENT nucleophile, with negative charge on both O and on the ortho C atoms of the ring, it will produce both (a) and (B) products.

35.	HClO is a weak acid. The concentration of H^(+) ions in 0.1 M solution of HClO (K_(a) = 5 xx 10^(-8)) will be equal to
Answer» `7.07 xx 10^(-5) m` `5 xx 10^(-9) m` `5 xx 10^(-7) m` `7 xx 10^(-4) m` Solution :`[H^(+)]^(2) = C.alpha = 0.1 xx 5 xx 10^(-8)` `H^(+) = sqrt(5 xx 10^(-9)) = 7.07 xx 10^(-5) M`.

36.	Here how many ligands are ambidentate? CN^(-), ONO^(-), S_(2)O_(3)^(2-), CNO^(-), C_(2)O_(4)^(2-), CH_(3)COO^(-)en
Answer» ANSWER :4

37.	Hclo is a weak acid. What is the concentration of H^+ions in 0.1 solution of Hclo '(K_a = 5 xx 10^-8)?
Answer» `7.07xx10^(-5)` M `5XX10^(-7)` M `5xx10^(-7)` M `7XX10^(-4)` M Answer :A

38.	Here each questions contains statements given in two columnns which have to be matched. Statements in Column I are labelled as A, B C and D wheras the statements in Coloumn II are labelled as p,q,r and s. the answer to these questions are to be appropriately bubbled as illustrated below in the following example. if the correct matches are A-P, A-s,B-q, B-r, C p ,C-q and D-p, their correctly labelled 4 x 4 matrix should look the . {:("Column I",,"Column II"),("(A) GeO",,"(p) Amphoteric "),("(B) CO",,"(q) Boric"),("(C) " SnO_(2),,"(r) Acidic"),("(D)" Te_(2)O,,"(s) Neutral"):}
Answer» Solution :GeO is acidic , CO is neutral , `SnO_(2)` is neutral `Te_(2)O` is BASIC OXIDE.

39.	HCl cannot form H_2Cl_2 whille HF can form H_2F_2 the reason is
Answer» FLUORINE is more reactive HF is more reactive Fluorine atom is SMALL and can FORM HYDROGEN bonds None ANSWER :C

40.	HClO is:
Answer» An oxide A chloride A hydride An acid Answer :D

41.	Here each questions contains statements given in two columnns which have to be matched. Statements in Column I are labelled as A, B C and D wheras the statements in Coloumn II are labelled as p,q,r and s. the answer to these questions are to be appropriately bubbled as illustrated below in the following example. if the correct matches are A-P, A-s,B-q, B-r, C p ,C-q and D-p, their correctly labelled 4 x 4 matrix should look the . {:("Column I",,"Column II"),("(A) Sn",,"(P) Highest density amongst group 14 elements "),("(B) Pb",,"(q) Lowestmelting point amongst group 14 elements "),("(C) Si",,"(r) Lowest I.E. amongst group 14 elements"),("(D) Ge",,"(s) Semiconductor used in transistor"):}
Answer» SOLUTION :SN has the LOWEST mp and the lowest IE and Pb has highest density among carbon family members and both Si and GE are used as semiconductors in TRANSITION.

42.	HCl When reacts with finely powdered iron. It forms ferrous chloride not ferric chloride why?
Answer» Solution :Its reaction with iron produces `H_(2)`. `Fe+2HClrarr FeCl_(2)+H_(2)` LIBERATION of HYDROGEN prevents the formation of ferric chloride.

43.	Here each question contains statements in two column which have to be matched statements in column I are labelled as A, B, C and D and the statements in column II are labelled as p,q,r and s. The answers are to be appropriately bubbled as illustrted in the following examples . Ifthe correct matches are A-p, A-s, B-q, B-r, C-p, C-q, and D-p then correctly bubbled 4xx4 matrix should look like the following.
Answer» ANSWER :A::B::C::D

44.	HCl is weaker than HI. Explain.
Answer» SOLUTION :Bond dissociation ENERGY HCl is greater than HI.

45.	Here each question contains statements in two column which have to be matched statements in column I are labelled as A, B, C and D and the statements in column II are labelled as p,q,r and s. The answers are to be appropriately bubbled as illustrted in the following examples . Ifthe correct matches are A-p, A-s, B-q, B-r, C-p, C-q, and D-p then correctly bubbled 4xx4 matrix should look like the following.
Answer» ANSWER :A::B::C::D

46.	HCl is covalent in:
Answer» AQUEOUS SOLUTION ETHEREAL solution Gaseous state None Answer :C

47.	Here each question contains statements in two column which have to be matched statements in column I are labelled as A, B, C and D and the statements in column II are labelled as p,q,r and s. The answers are to be appropriately bubbled as illustrted in the following examples . Ifthe correct matches are A-p, A-s, B-q, B-r, C-p, C-q, and D-p then correctly bubbled 4xx4 matrix should look like the following.
Answer» ANSWER :A::B::C::D

48.	HCI is labelled as 3.65% (w/v) 10ml of the solution is diluted to 1 lit. The proton concentration in the resulting solution is
Answer» `10^(-3)`M `2.5xx10^(-2)M` `7.5xx10^(-2)M` `10^(-2)M` ANSWER :D

49.	Here each question contains statements given in two columns which have to be matched. Statements in Column I are labelled as A, B, C and D whereas the statements in Column II are labelled as p, q, r and s. The answers to these questions are to be appropriately bubbled as illustrated below in the following example. If the correct matches are A-p, A-s, B-q, B-r, C-p, C-q and D-p, their correctly labelled 4 xx 4 matrix should look like :
Answer» SOLUTION :`F_2` is a GAS and shows variable oxidation state. `Br_2` is a liquid at room temperature and `I_2` is a SOLID at room temperature. Both these halogens SHOW variable oxidation states.

50.	HCl is a gas but HF is a low boiling liquid. This is because
Answer» H-F bond is strong H-F bonding is weak Molecules AGGREGATE because of HYDROGEN bonding HF is weak ACID Answer :C