100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS Page 63 InterviewSolution

3101.	Zinc is a cofactor for (A) Acid phosphatase(B) Alkaline phosphatase (C) Amylase (D) Lipase
Answer» (B) Alkaline phosphatase

Discussion

3102.	In the biosynthesis of heme, condensation between succinyl CoA and glycine requires (A) NAD+ (B) FAD (C) NADH + H+ (D) B6-phosphate
Answer» (D) B₆-phosphate

Discussion

3103.	A rise in blood ‘Ca’ may indicate (A) Paget’s disease (B) Vitamin D deficiency (C) Cushing’s disease (D) Hypervitaminosis D
Answer» (D) Hypervitaminosis D

Discussion

3104.	contribution of marco polo in development of printing press
Answer» (i) In 1295. Marco polo returned to Italy after many years of exploration in China. (ii) He brought the knowledge of woodblock printing with him. (iii) Now in Italy, books started to be produced with woodblocks and soon the technology spread to other parts of Europe.

3104.

contribution of marco polo in development of printing press

Answer»

(i) In 1295. Marco polo returned to Italy after many years of exploration in China.

(ii) He brought the knowledge of woodblock printing with him.

(iii) Now in Italy, books started to be produced with woodblocks and soon the technology spread to other parts of Europe.

Discussion

3105.	The major symptom of acute intermittent porphyria includes (A) Abdominal pain (B) Photosensitivity (C) No neuropsychiatric signs (D) Dermatitis
Answer» (A) Abdominal pain

Discussion

3106.	Acute intermittent porphyria (paraoxymal porphyria) is caused due to deficiency of (A) Uroporphyrinogen I synthase (B) ALA synthase (C) Coproporphyrinogen oxidase (D) Uroporphyrinogen decarboxylase
Answer» (A) Uroporphyrinogen I synthase

Discussion

3107.	Cobalt may act as cofactor for the enzyme: (A) Glycl-glycine dipeptidase (B) Elastase (C) Polynucleotidases (D) Phosphatase
Answer» (A) Glycl-glycine dipeptidase

Discussion

3108.	The condensation of 2 molecules of δ-aminolevulinate dehydratase contains (A) ALA synthase (B) ALA hydratase (C) Uroporphyrinogen synthase I (D) Uroporphyrinogen synthase III
Answer» (B) ALA hydratase

Discussion

3109.	The enzyme δ-aminolevulinate dehydratase contains (A) Zinc (B) Manganese (C) Magnesium (D) Calcium
Answer» Correct option (A) Zinc

Discussion

3110.	The regulatory enzyme for haem synthesis is (A) ALA synthetase (B) haem synthetase (C) Both (A) and (B) (D) None of these
Answer» (A) ALA synthetase

Discussion

3111.	Complete the following words using ai, au, ea, ee, ei, ie, oo, ou, ua, ue. 1. I could (a) bel _ _ ve that we would be able to (b) def _ _ t the army of Puru. 2. I must say every Indian (a) sold _ _ r (b) f _ _ ght like a tiger. 3. Their battle plans are (a) f _ _ lty and they depend too much upon th _ _ r elephants. 4. He (a) contin _ _ d to fight even when others had left the (b) f _ _ ld. 5. He will be (a) br _ _ ght to Your Majesty (b) s _ _ n. 6. Has he(a) b _ _ n put in (b) ch _ _ ns? 7. Puru joins the palms of his hands and raises them to his (a) foreh _ _ d to return the (b) gr _ _ ting. 8. He is, (a) ind _ _ d, a very (b) pr _ _ d man. 9. I’m (a) pl _ _ sed with you. I want to make (b) fr _ _ nds with you. 10. My kingdom should (a) rem _ _ n independent and you should treat me as your (b) eq _ _ l. 11. Third General: I’ve never f _ _ ght (a) such a battle before. Fourth General: I haven’t _ _ ther (b). Until the last moment. I couldn’t believe that we would be able to defeat the army of Puru.
Answer» 1. a) believe b) defeat 2. a) soldier b) fought 3. a) faulty b) their 4. a) continued b) field 5. a) brought b) soon 6. a) been b) chains 7. a) forehead b) greeting 8. a) indeed b) proud 9. a) pleased b) friends 10. a) remain b) equal 11. a) fought b) either

3111.

Complete the following words using ai, au, ea, ee, ei, ie, oo, ou, ua, ue. 1. I could (a) bel _ _ ve that we would be able to (b) def _ _ t the army of Puru. 2. I must say every Indian (a) sold _ _ r (b) f _ _ ght like a tiger. 3. Their battle plans are (a) f _ _ lty and they depend too much upon th _ _ r elephants. 4. He (a) contin _ _ d to fight even when others had left the (b) f _ _ ld. 5. He will be (a) br _ _ ght to Your Majesty (b) s _ _ n. 6. Has he(a) b _ _ n put in (b) ch _ _ ns? 7. Puru joins the palms of his hands and raises them to his (a) foreh _ _ d to return the (b) gr _ _ ting. 8. He is, (a) ind _ _ d, a very (b) pr _ _ d man. 9. I’m (a) pl _ _ sed with you. I want to make (b) fr _ _ nds with you. 10. My kingdom should (a) rem _ _ n independent and you should treat me as your (b) eq _ _ l. 11. Third General: I’ve never f _ _ ght (a) such a battle before. Fourth General: I haven’t _ _ ther (b). Until the last moment. I couldn’t believe that we would be able to defeat the army of Puru.

Answer»

1. a) believe b) defeat

2. a) soldier b) fought

3. a) faulty b) their

4. a) continued b) field

5. a) brought b) soon

6. a) been b) chains

7. a) forehead b) greeting

8. a) indeed b) proud

9. a) pleased b) friends

10. a) remain b) equal

11. a) fought b) either

Discussion

3112.	Complete the following words using ai, au, ea, ee, ei, ie, io, oa, oe, oi, oo, ou, ue, ui.1) The newspaper gave a (a) det _ _ led (b) acc _ _ nt of the boy’s fight wfth the tiger. 2) If he has (a) r _ _ l (b) c _ _ rage, he can do anything. 3) I don’t like the way you are (a) b _ _ ng (b) br _ _ ght up. 4) Swami rose (a) q _ _ etly from his place and (b) tipt _ _ d to his bed in the porch. 5) You must not be (a) afr _ _ d of darkness; it is only a (b) q _ _ stion of habit. 6) If you do it, I’ll tell your (a) t _ _ cher and make you the (b) l _ _ ghing stock of the whole school. 7) The night advanced and the silence in the (a) h _ _ se (b) d _ _ pened. 8) Swami’s (a) h _ _ rt began to(b) b _ _ t faster. 9) Swami (a) sp _ _ d his bed under the bench and (b) cr _ _ ched there. 10) He (a) gr _ _ ned in (b) desp _ _ r. 11) He (a) sh _ _ k in (b) f _ _ r and closed his eyes. 12) He heard a little rustling (a) n _ _ se in the (b) r _ _ m. 13) The devil would (a) s _ _ n pull him out and tear him to (b) p _ _ ces! 14) Swami bit into the (a) kn _ _ of a (b) notor _ _ us house breaker. 15) The headmaster said that he was a (a) tr _ _ (b) sc _ _ t. 16) He felt a (a) gr _ _ t (b) re _ _ f
Answer» 1. a) detailed b) account 2. a) real b) courage 3. a) being b) brought 4. a) quietly b) tiptoed 5. a) afraid b) question 6. a) teacher b) laughing 7. a) house b) deepened 8. a) heart b) beat 9. a) spread b) crouched 10. a) groaned b) despair 11. a) shook b) fear 12. a) noise b) room 13. a) soon b) pieces 14. a) knee b) notorious 15. a) true b) scout 16. a) great b) relief

3112.

Complete the following words using ai, au, ea, ee, ei, ie, io, oa, oe, oi, oo, ou, ue, ui.1) The newspaper gave a (a) det _ _ led (b) acc _ _ nt of the boy’s fight wfth the tiger. 2) If he has (a) r _ _ l (b) c _ _ rage, he can do anything. 3) I don’t like the way you are (a) b _ _ ng (b) br _ _ ght up. 4) Swami rose (a) q _ _ etly from his place and (b) tipt _ _ d to his bed in the porch. 5) You must not be (a) afr _ _ d of darkness; it is only a (b) q _ _ stion of habit. 6) If you do it, I’ll tell your (a) t _ _ cher and make you the (b) l _ _ ghing stock of the whole school. 7) The night advanced and the silence in the (a) h _ _ se (b) d _ _ pened. 8) Swami’s (a) h _ _ rt began to(b) b _ _ t faster. 9) Swami (a) sp _ _ d his bed under the bench and (b) cr _ _ ched there. 10) He (a) gr _ _ ned in (b) desp _ _ r. 11) He (a) sh _ _ k in (b) f _ _ r and closed his eyes. 12) He heard a little rustling (a) n _ _ se in the (b) r _ _ m. 13) The devil would (a) s _ _ n pull him out and tear him to (b) p _ _ ces! 14) Swami bit into the (a) kn _ _ of a (b) notor _ _ us house breaker. 15) The headmaster said that he was a (a) tr _ _ (b) sc _ _ t. 16) He felt a (a) gr _ _ t (b) re _ _ f

Answer»

1. a) detailed b) account

2. a) real b) courage

3. a) being b) brought

4. a) quietly b) tiptoed

5. a) afraid b) question

6. a) teacher b) laughing

7. a) house b) deepened

8. a) heart b) beat

9. a) spread b) crouched

10. a) groaned b) despair

11. a) shook b) fear

12. a) noise b) room

13. a) soon b) pieces

14. a) knee b) notorious

15. a) true b) scout

16. a) great b) relief

Discussion

3113.	Complete the following words using ai, ea, ee, ei, eo, ie, oa, oo, ou, ui.1. The ship looked much bigger than our (a) sch _ _ l (b) b _ _ lding. 2. (a) P _ _ ple came to see off their (b) fr _ _ nds and relatives. 3. The day was sunny and the (a) s _ _ was reflecting the (b) cl _ _ ds like a flat mirror. 4. I was surprised to see some in (a) sal _ _ n getting their (b) h _ _ r cut. 5. The medical staff was busy (a) tr _ _ ting the (b) pat _ _ nts suffering mostly from sea-sickness. . 6. The crew of the ship was very (a) fr _ _ ndly and (b) court _ _ us. 7. We watched coral (a) r _ _ fs, fishes arid sea turtles through glass-bottomed (b) b _ _ ts. 8. We felt as if the sandy (a) b _ _ ches and (b) gr _ _ nish blue sea were warmly welcoming us.9. Some (a) for _ _ gn (b) t _ _ rists on the beaches were basking in the sun. 10. We tasted (a) delici _ _ s Tandoori fish and other (b) s _ _ foods on the islands. 11. After a while, we (a) r _ _ ched an exciting place, the Mahatma Gandhi Marine National park. The park was spread over a wide area of 15 islands. Open creeks running through the park area were a (b) spec _ _ l attraction.
Answer» 1. a) school b) building 2. a) People b) friends 3. a) sea b) clouds 4. a) saloon b) hair 5. a) treating b) patients 6. a) friendly b) courteous 7. a) reefs b) boats 8. a) beaches b) greenish 9. a) foreign b) tourists 10. a) delicious b) seafoods 11. a) reached b) special

3113.

Complete the following words using ai, ea, ee, ei, eo, ie, oa, oo, ou, ui.1. The ship looked much bigger than our (a) sch _ _ l (b) b _ _ lding. 2. (a) P _ _ ple came to see off their (b) fr _ _ nds and relatives. 3. The day was sunny and the (a) s _ _ was reflecting the (b) cl _ _ ds like a flat mirror. 4. I was surprised to see some in (a) sal _ _ n getting their (b) h _ _ r cut. 5. The medical staff was busy (a) tr _ _ ting the (b) pat _ _ nts suffering mostly from sea-sickness. . 6. The crew of the ship was very (a) fr _ _ ndly and (b) court _ _ us. 7. We watched coral (a) r _ _ fs, fishes arid sea turtles through glass-bottomed (b) b _ _ ts. 8. We felt as if the sandy (a) b _ _ ches and (b) gr _ _ nish blue sea were warmly welcoming us.9. Some (a) for _ _ gn (b) t _ _ rists on the beaches were basking in the sun. 10. We tasted (a) delici _ _ s Tandoori fish and other (b) s _ _ foods on the islands. 11. After a while, we (a) r _ _ ched an exciting place, the Mahatma Gandhi Marine National park. The park was spread over a wide area of 15 islands. Open creeks running through the park area were a (b) spec _ _ l attraction.

Answer»

1. a) school b) building

2. a) People b) friends

3. a) sea b) clouds

4. a) saloon b) hair

5. a) treating b) patients

6. a) friendly b) courteous

7. a) reefs b) boats

8. a) beaches b) greenish

9. a) foreign b) tourists

10. a) delicious b) seafoods

11. a) reached b) special

Discussion

3114.	The characteristic urinary finding in acute intermittent porphyria is (A) Increased quantity of uroporphyrin (B) Increased quantity of coproporphyrin I (C) Increased quantity of coproporphyrin III (D) Massive quantities of porphobilinogen
Answer» (D) Massive quantities of porphobilinogen

Discussion

3115.	Conversion of the linear tetrapyrrole hydroxymethylbilane to uroporphyrinogen III (A) Occurs spontaneously (B) Catalysed by uroporphyrinogen I synthase (C) Catalysed by uroporphyrinogen III cosynthase (D) Catalysed by combined action of uroporphyrinogen I synthase and uroporphyrinogen III cosynthase
Answer» (D) Catalysed by combined action of uroporphyrinogen I synthase and uroporphyrinogen III cosynthase

Discussion

3116.	During breakdown of haem, the methenyl bridge between the following two pyrrole rings is broken: (A) I and II (B) II and III (C) III and IV (D) IV and I
Answer» (A) I and II

Discussion

3117.	Regulation of haem synthesis occurs by (A) Covalent modification (B) Repression - derepression (C) Induction (D) Allosteric regulation
Answer» (B) Repression - derepression

Discussion

3118.	A cofactor required for the activity of the enzyme ALA dehydratase is (A) Cu (B) Mn (C) Mg (D) Fe
Answer» Correct option (A) Cu

Discussion

3119.	Identify the major aspect that helped in the formation of a nation-state in Britain. A. In 1688, the monarch of Britain fought war with English Parliament. B. The Parliament through a bloodless revolution seized power from the monarchy. C. The British nation was formed as a result of a war with Ireland and Wales. D. The formation of a nation-state in Britain was the result of many revolts.
Answer» B. The Parliament through a bloodless revolution seized power from the monarchy.

Discussion

3120.	An amino acid required for porphyrin synthesis is (A) Proline (B) Glycine (C) Serine (D) Histidine
Answer» Correct option (A) Proline

Discussion

3121.	The porphyrin present in haem is (A) Uroporphyrin (B) Protoporphyrin I (C) Coproporphyrin (D) Protoporphyrin II
Answer» (D) Protoporphyrin II

Discussion

3122.	The number of molecules of porphobilinogen required for the formation of a tetrapyrrole i.e., a porphyrin is (A) 1 (B) 2 (C) 3 (D) 4
Answer» Correct option (D) 4

3122.

The number of molecules of porphobilinogen required for the formation of a tetrapyrrole i.e., a porphyrin is (A) 1 (B) 2 (C) 3 (D) 4

Answer»

Correct option (D) 4

Discussion

3123.	Two statements are given below as Assertion (A) and Reasoning (R). Read the statement and choose the most appropriate optionAssertion (A): In Britain, the formation of the nation-state was not the result of a sudden upheaval.Reason (R): Ethnic groups of Britain extended its influence(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) (b) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A). (c) Assertion (A) is true but Reason (R) is false. (d) Assertion (A) is false but Reason (R) is true.
Answer» (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

Discussion

3124.	Porphyrin synthesis is inhibited in (A) Mercury poisoning (B) Lead poisoning (C) Manganese poisoning (D) Barium poisoning
Answer» (B) Lead poisoning

Discussion

3125.	Main symptoms of congenital erythropoietic porphyria is (A) Yellowish teeth (B) Photosensitivity (C) Abdominal pain (D) Brownish urine
Answer» (B) Photosensitivity

Discussion

3126.	The most abundant organic molecule on the surface of the Earth is: w) cellulose x) chitin y) DNA z) hemoglobin
Answer» The most abundant organic molecule on the surface of the Earth is CELLULOSE.

Discussion

3127.	Psychotic symptoms and parkinsonism like symptoms develop due to inhalation poisoning of (A) Manganese (B) Phosphorous (C) Magnesium (D) Zinc
Answer» (A) Manganese

Discussion

3128.	Intolerance between ethnic groups _____ on lack of information. A) usually based B) which has been based C) which is usually based D) is usually based
Answer» Correct option is D) is usually based

Discussion

3129.	In Vitamin D poisoning (hyper-vitaminosis) (A) Both serum and urinary “Ca” (B) The serum Ca is low and urinary calcium high (C) The serum “Ca” is increased and urinary “Ca” is normal (D) Both serum and urinary “Ca” are low
Answer» (A) Both serum and urinary “Ca”

Discussion

3130.	The normal serum level of phosphorous in children varies from (A) 1–2 mg/100 ml (B) 2–3 mg/100 ml (C) 3–4 mg/100 ml (D) 4–7 mg/100 ml
Answer» (D) 4–7 mg/100 ml

Discussion

3131.	B.M.R. is lowered in (A) Hypothyroidism (B) Leukemia (C) Cardiac failure (D) Hyperthyroidism
Answer» (A) Hypothyroidism

Discussion

3132.	The normal serum inorganic phosphorous level is (A) 1.5–2.5 mg/100 ml (B) 2.5–4.5 mg/100 ml (C) 4.5–6.5 mg/100 ml (D) 0.5–1.5 mg/100 ml
Answer» (B) 2.5–4.5 mg/100 ml

Discussion

3133.	When phosphorous level is lowered ? (A) In hyper thyroidism(B) Cirrosis of liver (C) Leukemia (D) Hypothyroidism
Answer» (A) In hyper thyroidism

Discussion

3134.	BMR stands for …………(a) Body matabolic rate (b) Basal matabolic rate (c) Body mass rate (d) Basal mass rate
Answer» (b) Basal matabolic rate

Discussion

3135.	Copper sulphate solution on treatment with excess of KI gives whitish precipitate. The precipitate is-(a) Cu I2(b) Cu2 I2(c) Cu2 SO4(d) I2
Answer» Answer is (a) Cu I₂

Discussion

3136.	What happens when copper sulphate reacts with KI solution?
Answer» When copper sulphate reacts with KI solution then total iodine is separates and white precipate of curpous iodine is formed. 2CuSO₄ + 4KI → 2K₂SO₄ + Cu₂I₂ + I₂

3136.

What happens when copper sulphate reacts with KI solution?

Answer»

When copper sulphate reacts with KI solution then total iodine is separates and white precipate of curpous iodine is formed.

2CuSO₄ + 4KI → 2K₂SO₄ + Cu₂I₂ + I₂

Discussion

3137.	Given below are two statements:Statement I: Iron (III) catalyst, acidified K2Cr2O7 and neutral KMnO4 have the ability to oxidise I- to I2 independently.Statement II: Manganate ion is paramagnetic in nature and involves pπ –pπ bonding.In the light of the above statements, choose the correct answer from the options.(A) Both statement I and Statement II are ture(B) Both statement I and Statement II are false(C) Statement I is true but Statement II is false(D) Statement I is false but Statement II is true
Answer» Correct option is (B) Both statement I and Statement II are false Neutral KMnO₄ oxidises \(I^-\) to \(IO_3^-\) Manganate ion has dπ-pπ bonding.

3137.

Given below are two statements:Statement I: Iron (III) catalyst, acidified K2Cr2O7 and neutral KMnO4 have the ability to oxidise I- to I2 independently.Statement II: Manganate ion is paramagnetic in nature and involves pπ –pπ bonding.In the light of the above statements, choose the correct answer from the options.(A) Both statement I and Statement II are ture(B) Both statement I and Statement II are false(C) Statement I is true but Statement II is false(D) Statement I is false but Statement II is true

Answer»

Correct option is (B) Both statement I and Statement II are false

Neutral KMnO₄ oxidises \(I^-\) to \(IO_3^-\)

Manganate ion has dπ-pπ bonding.

Discussion

3138.	What happens when H2S reacts with acidified K2Cr2O7 solution?
Answer» When H₂S reacts with acidic K₂Cr₂O₇ solution, then K₂Cr₂O₇ reduced into chromic sulphate(green colour) obtained solution is green. K₂Cr₂O₇ + H₂SO₄ + 3SO₂ → K₂SO₄ + Cr₂(SO₄)₃ + H₂O

3138.

What happens when H2S reacts with acidified K2Cr2O7 solution?

Answer»

When H₂S reacts with acidic K₂Cr₂O₇ solution, then K₂Cr₂O₇ reduced into chromic sulphate(green colour) obtained solution is green.

K₂Cr₂O₇ + H₂SO₄ + 3SO₂ → K₂SO₄ + Cr₂(SO₄)₃ + H₂O

Discussion

3139.	The region of the United States with the lowest pH values found in rainwater (acid rain) is: w) Mid West x) North Westy) North Eastz) South Eas
Answer» The region of the United States with the lowest pH values found in rainwater (acid rain) is NORTH EAST.

Discussion

3140.	Equimolar mixture of two gases \( A_{2} \) and \( B_{2} \) is taken in a rigid vessel at temperature \( 300 K \). The gases reacts according to given equations :\[\begin{array}{ll}A_{2}(g) \rightleftharpoons 2 A(g) & K_{P_{1}}=? \\B_{2}(g) \rightleftharpoons & K_{P_{2}}=? \\A_{2}(g)+B_{2}(g) & \rightleftharpoons 2 A B(g) & K_{P_{3}}=2\end{array}\]If the initial pressure in the container was 2 atm and final pressure developed at equilibrium is \( 2.75 atm \). in which equilibrium partial pressure of gas \( A B \) was \( 0.5 atm \), calculate the ratio of \( \frac{ K _{ p _{2}}}{ K _{ p _{1}}} \).[Given : Degree of dissociation of \( B_{2} \) is greateı than \( A _{2} \) ].
Answer» this is the solution!!!!

Discussion

3141.	Which of the following statements are correct? A \( \quad \sin 1>\sin 1^{\circ} \)B \( \tan 2<0 \)C \( \tan 1>\tan 2 \)D \( \tan 2<\tan 1<0 \)
Answer» Correct option is (A) sin 1 > sin 1° Relation between degree and radian is 180° = π radian ⇒ 1° = π/180 radian = 3.14/180 < 1 ⇒ 1° < 1 ∴ sin 1° < sin 1 ( ∵ tan θ is always increasing function) ∵ 2 > 0 ∵ 2 > 1 > 0 ⇒ tan 2 > tan 1 > tan 0 ⇒ tan 2 > tan 1 > 0

3141.

Which of the following statements are correct? A \( \quad \sin 1>\sin 1^{\circ} \)B \( \tan 2<0 \)C \( \tan 1>\tan 2 \)D \( \tan 2<\tan 1<0 \)

Answer»

Correct option is (A) sin 1 > sin 1°

Relation between degree and radian is

180° = π radian

⇒ 1° = π/180 radian = 3.14/180 < 1

⇒ 1° < 1

∴ sin 1° < sin 1 ( ∵ tan θ is always increasing function)

∵ 2 > 0

∵ 2 > 1 > 0

⇒ tan 2 > tan 1 > tan 0

⇒ tan 2 > tan 1 > 0

Discussion

3142.	\( 16] \)Let \( U=\{1,+2,3,4,5,6,7,8,9\} \quad A=\{1,2,3,4\} \) \( B=\{2,4,6,8\} \) Find \( (A \cap B)^{\prime} \)
Answer» \(A \cap B = \{2,4\}\) \((A\cap B)' = \{1,3,5,6,7,8,9\}\)

3142.

\( 16] \)Let \( U=\{1,+2,3,4,5,6,7,8,9\} \quad A=\{1,2,3,4\} \) \( B=\{2,4,6,8\} \) Find \( (A \cap B)^{\prime} \)

Answer»

\(A \cap B = \{2,4\}\)

\((A\cap B)' = \{1,3,5,6,7,8,9\}\)

Discussion

3143.	158 grams of potassium permanganate is reacted with ferrous sulfide in the presence of hydrochloric acid, approximately how much ferric sulfate will it produce?(a) 111 grams(b) 169 grams(c) 254 grams(d) 399 grams
Answer» Right choice is (a) 111 grams For explanation: The balanced chemical reaction is 18KMnO4 + 10FeS + 32H2SO4 -> 18MnSO4 + 5Fe2(SO4)3 + 9K2SO4 + 32H2O, => weight of ferric sulfate = (158/158)(5/18)400 = 111.1 grams ≈ 111 grams.

Discussion

3144.

Consider the following reaction at \( 600^{\circ} C \). \[ 2 SO _{2}( g )+ O _{2}( g ) \rightleftharpoons 2 SO _{3}( g ) ; \quad K_{C}=4.00 \] A mixture was prepared with \( \left[ SO _{3}\right]=0.50 M ,\left[ O _{2}\right]=0.35 M \) and \( \left[ SO _{2}\right]=0.0 M \) Thus, equilibrium concentration of \( O _{2} \) is (a) \( 0.0450 M \) (b) \( 0.035 M \) (c) \( 0.35 M \) (d) \( 0.45 M \)

Answer»

Correct option is (d) 0.45 M

Given,

\(2SO_2(g) + O_2(g) \leftrightharpoons 2SO_3(g)\)

\(K_C = \frac{[SO_3]^2}{[SO_2]^2[O_2]^2}\)

initially	0.0M	0.35M	0.5M
at equilibrium	0.0 - 2x	0.35 - x	0.5 + 2x

\(\therefore K_C= \frac{(0.5 + 2x)^2}{(-2x)^2(0.35 -x)}\)

⇒ \(4 = \frac{0.25 + 4x^2 + 2x}{4x^2 (0.35 -x)}\)

⇒ \(16x^2 (0.35 - x) = 0.25 + 4x^2+ 2x\)

⇒ \(5.6 x^2 - 16x^3= 0.25+4x^2+ 2x\)

⇒ \(16 x^3 - 1.6 x^2 + 2x + 0.25 = 0\)

⇒ \(x = - 0.10633\)

∴ Concentration of O₂at equilibrium

\(= 0.35 - (-0.10633)\)

\(= 0.35 + 0.10633\)

\(= 0.456 M\)

Discussion

3145.	What do you understand by activation of adsorption `: ` How is it achieved.
Answer» Activation of adsobent means, increasing the adsorbing power of an adsobent. This can be done by increasing the surface area of the adsobent which can be achieved in any of the following ways `:` `a.` By removing the gases adsorbed, `i.e.,` wood charcoal can be activated by heating it between `650K` and `1330K` in vacuum or super heated steam. `b.` By breaking the adsorbent into small pieces. `c.` By making the surface of adsorbent rough.

Discussion

3146.	Why is furan less reactive than thiophene?
Answer» Furan is comparatively less reactive because O-atom (in furan )can accommodate accommodate a positive charge less readily at N-atom (in Pyrrole). Thiophene is being followed by these two and is least reactive.

Discussion

3147.	What is the difference between displacement and double displacement reaction?Give suitable chemical equations for the same.
Answer» Displacement reaction: Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Zn+2HCl⟶ZnCl₂+H₂ Double displacement reaction: A type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products is called double displacement reactions. MgCl₂+2KOH⟶Mg(OH)₂ +2KCl

3147.

What is the difference between displacement and double displacement reaction?Give suitable chemical equations for the same.

Answer»

Displacement reaction:
Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound.

Zn+2HCl⟶ZnCl₂+H₂

Double displacement reaction:
A type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products is called double displacement reactions.

MgCl₂+2KOH⟶Mg(OH)₂ +2KCl

Discussion

3148.	Calculate the pKa of lactic acid, given that when the concentration of lactic acid is 0.010M and the concentration of lactate is 0.087M, the pH is 4.80.
Answer» pH = pK_a + log [lactate]/[lactic acid] pK_a = pH – log [lactate]/[lactic acid] = 4.80 – log (0.087/0.010) = 4.80 – log 8.7 = 3.9.

3148.

Calculate the pKa of lactic acid, given that when the concentration of lactic acid is 0.010M and the concentration of lactate is 0.087M, the pH is 4.80.

Answer»

pH = pK_a + log [lactate]/[lactic acid]

pK_a = pH – log [lactate]/[lactic acid]

= 4.80 – log (0.087/0.010)

= 4.80 – log 8.7

= 3.9.

Discussion

3149.	Which of the following statements is correct ? (i) Copper is extracted by hydrometallury from low grade ores. (ii) In electrolytic reduction of alumina , graphite is acting as anode and steel vessel with lining of carbon acts as cathode. (iii) In Hall-Heroult process, aluminium is obtained at anode and CO and `CO_(2)` are produce at cathodeA. (i) onlyB. (i) and (ii) onlyC. (ii) and (iii) onlyD. All of these
Answer» Correct Answer - B In Hall-Heroult process, At cathode : `Al_("(melt)")^(3+)+ 3e^(-) to Al_((l))` At anode : `C_((s)) + O_("(melt)")^(2-) to CO_(2(g)) + 4e^(-)` `C_((s)) + 2O_("(melt)")^(2-) to CO_(2(g)) + 4e^(-)`

Discussion

3150.

What mass of \( NaCl (58.5 g / mol ) \) must be dissolved in \( 65 g \) water to lower the freezing point by \( 7.5^{\circ} C \) ? \( Kr ^{-1.86} \) \( K Kg / mol \) and \( i \) for \( Na Cl =1.86 \).

Answer»

As we know

\(\Delta T_f = iK_fm\)

i = Van't hoff factor

⇒ \(7.5 ^\circ K = 1.86 \times 1.86 \times \frac{\frac{w}{58.5}\times 1000}{65}\)

⇒ \(w = \frac{7.5 \times 65 \times 58.5}{1.86 \times 1.86 \times 1000}\)

w = 0.24 g

Discussion

Explore topic-wise InterviewSolutions in .

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Why is furan less reactive than thiophene?

What is the difference between displacement and double displacement reaction?Give suitable chemical equations for the same.

Calculate the pKa of lactic acid, given that when the concentration of lactic acid is 0.010M and the concentration of lactate is 0.087M, the pH is 4.80.

What mass of \( NaCl (58.5 g / mol ) \) must be dissolved in \( 65 g \) water to lower the freezing point by \( 7.5^{\circ} C \) ? \( Kr ^{-1.86} \) \( K Kg / mol \) and \( i \) for \( Na Cl =1.86 \).

Which of the following statements are correct? A \( \quad \sin 1>\sin 1^{\circ} \)B \( \tan 2<0 \)C \( \tan 1>\tan 2 \)D \( \tan 2<\tan 1<0 \)