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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. |
What are the reasons for unbalanced current in motor? |
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Answer» a. Loose power cable connection. b. Voltage unbalance. c. Short-circuited turns of coils of winding. |
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| 2. |
What are the reasons for high current in motor? |
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Answer» a. High frequency – at 51 Hz current will be 105% of the normal current. b. Low frequency – at 47.8 Hz current will be 102% of the normal current. c. High voltage. d. Under voltage. e. Mechanical over loading. f. Process requirement. |
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| 3. |
Give an example of a chromosomal disorder caused due to non - disjunction of autosomes. |
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Answer» Down's syndrome. |
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| 4. |
Rate of mutation is affected byA. temperatureB. X-raysC. gamma raysD. all of these |
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Answer» Correct Answer - D Any extracellular physical or chemical factor which can cause mutations or increase the frequency of mutations in organisms is called mutagen. They include, temperature and high energy radiations such as X-rays, ultra-violet rays and gamma rays. |
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| 5. |
Refer the given statements (i) Incomplete or mosaic inheritance is an example of pre-Mendelian concept of blending inheritance (ii) Test cross is a special type of back cross (iii) Chromosomal aberrations are commonly observed in cancer cells (iv) Thalassaemia is a Mendelian disorder Which of the above statements are correct ?A. (i) and (ii) onlyB. (ii),(iii) and (iv)C. (ii) and (iv) onlyD. (i) and (iv) only |
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Answer» Correct Answer - B Incomplete (partial or mosaic) dominance is the phenomenon where none of the two contrasting alleles or factors is diminant. The expression of the character in a hybrid or `F_(1)` individual is intermediate or a fine mixture of the expression of the two factor (as found in homozygous state). Incomplete or mosaic inheritance is not an example of pre-mendelian concept of blending inheritance because the parental types reappear in the `F_(2)` generation. |
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| 6. |
Which of the following is not a example of recessive autosomal disease ?A. HaemophiliaB. Cystic fibrosisC. PheylketonuriaD. Sickle-cell anaemia |
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Answer» Correct Answer - A Haemopjilia is a sex-linked recessive disease in which the patient continues to bleed even from a minor cut since he or she does not possess the natural phenomenon of blood clotting. |
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| 7. |
Placed below is a karyotype of a human being..On the basis of this karyotype, which of the following conclusions can be drawn: A. Normal human female B. Person is suffering from Colour Blindness C. Affected individual is a female with Down’s syndrome D. Affected individual is a female with Turner’s syndrome |
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Answer» Correct option is C. Affected individual is a female with Down’s syndrome |
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| 8. |
Given below is a dihybrid cross performed on Drosophila.Which of the following conclusions can be drawn on the basis of this cross? When yellow bodied (y), white eyed (w) Drosophila females were hybridized with brown bodied (y+), red eyed males (w+) and F1 progenies were intercrossed, F2 generation would have shown the following ratio: A. 1:2:1 because of linkage of genes B. 9:3:3:1 because of recombination of genes C. Deviation from 9:3:3:1 ratio because of segregation of genes D. Deviation from 9:3:3:1 ratio because of linkage of genes |
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Answer» Correct option is D. Deviation from 9:3:3:1 ratio because of linkage of genes |
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| 9. |
Which cellular process is shown below?A. DNA Replication B. Translation - Initiation C. Translation - Elongation D. Translation – Termination |
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Answer» Correct option is C. Translation- Elongation |
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| 10. |
Which of the following is chain termination codon? (a) AUG (b) GUG (c) UAA (d) ACC |
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Answer» UAA is chain termination codon. |
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| 11. |
Consider the following statements about the genetic code and identify which of them is/ are INCORRECT. 1: AUG is an initiator codon. 2: Codons in bacteria and animals usually are different. 3: All codons are triplets of amino acids and code for base pairs. 4: All codons are triplets of base pairs and code for amino acids. A. only 3 B. only 2 and 3 C. only 1 and 4 D. only 1, 2 and 3 |
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Answer» B. only 2 and 3 |
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| 12. |
What is lace? |
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Answer» Lace is an open work fabric with complex patterns or figures, handmade or machine made. |
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| 13. |
What is a function of a TV Tuner? |
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Answer» A TV tuner allows a person to receive signals on his or her television, and therefore receive different channels. It converts signals into pictures and sounds. The oldest type of tuner was simply the dial used to change channels and allow the television to pick up different analog signals broadcast over the air. Sometimes, in order to get certain cable channels, a TV needs a special box purchased or rented from a cable company |
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| 14. |
What are the advantages of Structured play? |
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Answer» i. Encourage creativity ii. Retain interest iii. Promote sense of ownership iv. Promote communication v. Enhance learning |
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| 15. |
What are the stages involved in rearing of chicken? |
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Answer» Stages involved in rearing: There are some steps involved in rearing of chicken. 1. Selection of the best layer: An active intelligent looking bird, with a bright comb, not obese should be selected. 2. Selection of eggs for hatching: Eggs should be selected very carefully. Eggs should be fertile, medium sized, dark brown shelled and freshly laid eggs are preferred for rearing. Eggs should be washed, cleaned and dried. 3. Incubation and hatching: The maintenance of newly laid eggs in optimum condition till hatching is called incubation. The fully developed chick emerges out of egg after an incubation period of 21 – 22 days. There are two types of incubation namely natural incubation and artificial incubation. In the natural incubation method, only a limited number of eggs can be incubated by a mother hen. In artificial incubation, more number of eggs can be incubated in a chamber (Incubator). 4. Brooding: Caring and management of young chicks for 4 – 6 weeks immediately after hatching is called brooding. It can also be categorized into two types namely natural and artificial brooding. 5. Housing of Poultry: To protect the poultry from sun, rain and predators it is necessary to provide housing to poultry. Poultry house should be moisture proof, rat proof and it should be easily cleanable and durable. 6. Poultry feeding: The diet of chicks should contain adequate amount of water,carbohydrates, proteins, fats, vitamins and minerals. |
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| 16. |
Entomology is concerned with the study of …………(a) Formation and properties of soil (b) Agricultural practices (c) Various aspects of human life (d) Various aspects of insect |
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Answer» (d) Various aspects of insect |
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| 17. |
Advantages of LED TV are less power consumption and _____ |
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Answer» Advantages of LED TV are less power consumption and Free from Angle viewing. |
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| 18. |
Planning of play is a part of Structured or Unstructured play? |
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Answer» Structured play |
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| 19. |
Explain the differences between structured data and unstructured data. |
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Answer» Structured data are facts concerning objects and events. The most important structured data are numeric, character, and dates. Structured data are stored in tabular form. Unstructured data are multimedia data such as documents, photographs, maps, images, sound, and video clips. Unstructured data are most commonly found on Web servers and Web-enabled databases. |
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| 20. |
Which of the following is not a natural polymer?(a) Protein(b) Rayon(c) Starch(d) Rubber |
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Answer» Correct option is (b) Rayon Rayon is a synthetic polymer. |
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| 21. |
Match List I with List II:List-IPolymerList-IIUsed for itemsA. Nylon 6,6I. BucketsB. Low density polytheneII. Non-stick utensilsC. High density polytheneIII. Bristles of brushesD. TeflonIV. ToysChoose the correct answer from the options given below: (A) A–III, B-I, C-IV, D-II(B) A–III, B-IV, C-I, D-II(C) A–II, B-I, C-IV, D-III(D) A–II, B-IV, C-I, D-III |
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Answer» Correct option is (B) A–III, B-IV, C-I, D-II LDRE → Toys HDRE → Buckets |
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| 22. |
`C_(2)H_(5).OC_(2)H_(5)to underset("red color") underset(darr KCNS) underset( darr Fe^(2+)) (A+B)` Which is not true for above reactions?A. `A` & `B` are explosivesB. If `A` & `B` are present in ether, then prior ot its use `A` & `B` must be removed from etherC. `A` & `B` can not be removed by adding conc. `H_(2)SO_(4)`D. When `A` & `B` are treated with `Fe^(2+)` followed by `KCNS`, no redox reaction is invelved. |
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Answer» Correct Answer - D `A` & `B` are peroxides & hydroperoxides which oxidizes `Fe^(2+)` to `Fe^(3+)` |
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| 23. |
1. Some compounds of sodium and calcium are given below. Match them. A B(i) Washing soda(ii) Baking soda(iii) Gypsum(iv) Plaster of Paris1. CaSO4.1/2H2O2. Na2CO33.NaHCO34. CaSO4.2H2O2. On passing CO2 through lime water, milkiness appears. On further passing CO2 milkiness disappears. What is the Chemistry behind it? |
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Answer» 1.
Ca(OH)2 + CO2 → CaCO3 + H2O When CO2 is passed through lime water for a long time, it becomes colourless due to the formation of water soluble calcium bicarbonate. CaCO3 + H2O + CO2 → CaO(HCO3)2 |
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| 24. |
Why are potassium and caesium, rather than lithium used in photoelectric cells? |
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Answer» Potassium and caesium have much lower ionisation enthalpy than that of lithium. As a result, these metals on exposure to light, lose electrons much more easily than lithium. Hence, potassium and caesium rather than lithium are used in photoelectric cells. |
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| 25. |
Li2CO3 decomposes at a lower temperature whereas Na2CO3 at higher temperature ....... |
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Answer» Li+ is very small |
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| 26. |
A sodium potassium alloy is used as a ....... |
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Answer» coolant in nuclear reactor. |
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| 27. |
Potassium carbonate cannot be prepared by Solvay process. Why? |
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Answer» Potassium carbonate cannot be prepared by Solvay process because potassium biocarbonate being highly soluble in water does not get precipitated in carbonation tower when CO2 is passed through a concentrated solution of KCI saturated with ammonia. |
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| 28. |
The stability of alkaline earth metal carbonate. |
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Answer» Increases from Be to Ba |
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| 29. |
Match the following: A B C Caustic Soda CaCO3It is used as mordant in dyeingWashing sodaMgSO4.7H2OIt is used for softening of hard waterLime stone CaSO4. 1/2H2OIt is used in petroleum refiningEpsom saltNaOHFor making moulds for potteryPlaster of Paris Na2CO3Used in Cement manufacturing |
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| 30. |
(a) How will you prepare Ca(OH)2 and CaCO3 from quicklime.(b) Give any two uses of quick lime. |
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Answer» (a) By adding water to quick lime we can prepare Ca(OH)2 . This process is called slaking. CaO + H2O → Ca(OH)2 When CO2 is passed through lime water we can prepare CaCO3 . Ca(OH) + CO → CaCO + H O (b) 1. As an important primary material for manufacturing cement. 2. In the manufacture of Na2CO3 from NaOH. |
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| 31. |
Pick out the odd one and write reason for it.Ca(OH)2 , Mg(OH)2 , Ba(OH)2 , Be(OH)2 Sp |
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Answer» Be(OH)2. The others hydroxides are basic but Be(OH)2 is amphoteric. |
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| 32. |
A compound is used as drying agent as such or as soda lime with NaOH and it is used on a very large scale as a building material. (a) Which is this compound? (b) How can we prepare this compound? (c) What are the properties of this compound? |
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Answer» (a) Calcium oxide (b) It can be prepared by heating lime stone in a rotary kiln at 1070-1270 K. (c) Pure calcium oxide is an amorphous white solid of very high melting point. It is sparingly soluble in water. Calcium oxide readily absorbs moisture and carbon dioxide. |
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| 33. |
The element placed at the bottom of the alkali metal family is expected to (a) Have maximum ionisation enthalpy (b) Be the least reducing agent (c) Be the least electropositive element (d) Be the most easily ionisable |
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Answer» (d) Be the most easily ionisable |
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| 34. |
Which of the following is least soluble in water? (a) BeSO4 (b) BaSO4 (c) CaSO4 (d) SrSO4 |
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Answer» BaSO4 is least soluble in water. |
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| 35. |
1. Name the element showing anomalous behaviour in group 2. Give reason forthis anomalous behaviour.3. List any two similarities between Be and Al. |
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Answer» 1. Be 2. Be has exceptionally small atomic and ionic size, it has high ionisation enthalpy, it cannot exhibit coordination number more than four as in its valence shell there are only four orbitals. There are no d-orbitals. 2. (i) Both Be and Al are not readily attacked by acids because of the presence of an oxide film on the surface of the metal. (ii) The chlorides of both Be and Al have Cl bridged chloride structure in vapour phase. |
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| 36. |
Give the biological importance of Na+ and K+. |
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Answer» Biological importance of sodium: The Na+ ions participate in the transmission of nerve signals, in regulating the ow of water across cell membranes and in the transport of sugars and amino acids into cells. Biological importance of potassium: The K+ ions activate many enzymes, participate in the oxidation of glucose to produce ATP and, with sodium, are responsible for the transmission of nerve signals. |
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| 37. |
Cement is an important building material employed in different kinds of construction works.1. What are the major raw materials for making cement? 2. How is cement prepared? 3. What are the important ingredients of Portland cement? 4. Explain the Chemistry involved in the setting of cement. |
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Answer» 1. Limestone, Clay 2. When clay and lime are strongly heated together they fuse and react to form cement clinker. This clinker is mixed with 2- 3% by weight of gypsum to form cement. 3. Dicalcium silicate (Ca2SiO4) – 26%, tricalcium silicate (Ca3SiO5) – 51% and tricalcium aluminate (Ca3Al2O6) – 11% 4. When mixed with water, the setting of cement takes place to give a hard mass. This is due to the hydration of the molecules of the constituents and their rearrangement. |
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| 38. |
Which of the following have lowest thermal stability?(a) Li2CO3 (b) Na2CO3 (c) K2O3 (d) Rb2CO3 |
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Answer» Li2CO3 have lowest thermal stability. |
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| 39. |
A mixture of NaOH and CaO is known as ........ |
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Answer» A mixture of NaOH and CaO is known as Soda lime. |
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| 40. |
Molar heat capacity at constant volume can be given asA. `C_(V)=(d E)/(d T)`B. `C_(V)=(d H)/(d T)`C. `C_(p)=(d E)/(d T)`D. `C_(p)=(d H)/(d T)` |
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Answer» Correct Answer - A At constant volume , `q=DeltaEor dE ` `therefore C_(v)=[(dE)/(dT)]` |
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| 41. |
1. Which metal is present in chlorophyll? 2. What is the role of calcium in our body? |
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Answer» 1. Mg 2. About 90% of body calcium is present in bones and teeth. It also plays important roles in neuromuscular function, intemeuronal transmission, cell membrane integrity and blood coagulation. |
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| 42. |
The chemical formula of Plaster of Paris is (a) Ca2SiO4 .½H2O (b) Ca2SiO4 .2H2O (c) CaSO4 .½H2O (d) CaSO4 .2H2O |
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Answer» (c) CaSO4 .½H2O |
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| 43. |
1. Match the following : A B1. Washing Soda 2. Plaster of Paris 3. Slaked lime 4. Bleaching power CaSO4.2H2ONaOHCaCOCl2Ca(OH)2CaONa2CO3CaSO4.1/2H2O2. Study the list of elements given below: Na, Mg, Li, B, C Select the pairs showing diagonal relationship. 3. Write the chemical equation showing the reaction of sodium metal with water. |
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Answer»
2. Li, Mg 3. 2Na + 2H2O → 2NaOH + H2 |
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| 44. |
The density at `20^(@)C` of a 0.5 solution of acetic acid in water is `1.0042` g/m L. The molality of the solutionA. `0.50m`B. `0.613m`C. `0.513m`D. `0.48m` |
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Answer» Correct Answer - C Let , volume of solution `=1000m L` Moles of solute `=0.5` `therefore` Weight of acetic acid `=0.5xx60g=30g` Mass of solution = volume of solution x density `therefore = 1000m L xx1.0042g//m L ` `therefore` Mass of solution `=1004.2g` Mass of solvent `=1004 .2g-30g` `therefore =974.2g` Molality `=(1000xx"moles of solute")/("mass of solvent")=(1000xx0.5)/(974.2)` `therefore` Molality `=0.513 m` |
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| 45. |
If the heat fo dissolution of anhydrous `CuSO_(4)` and `CuSO_(4).5H_(2)O` is `-15.89 kcal` and `2.80 kcal`, respectively, then the heat of hydration of `CuSO_(4)` to form `CuSO_(4).5H_(2)O` isA. `-13.09` kcalB. `-18.69` kcalC. `+13.09`kcalD. `+18.69` kcal |
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Answer» Correct Answer - B (i) `CuSO_4+aqto CuSO_4(ag)DeltaH_1=-1589kcal` (ii) `CuSO_4.5H_2O+aqtoCuSO_4(aq)DeltaH_2=+2.8kcal` Eq.(i) -Eq.(ii) gives `DeltaH=-1869kcal (DeltaH=DeltaH_1-DeltaH_2)` |
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| 46. |
Density of a gas is found to be `4 gm//dm^(3)` at `27^(@)C` and 2 bar pressure. It density at STP will be :A. `1.80 gm//dm^(3)`B. `2.22 gm//dm^(3)`C. `3.10 gm//dm^(3)`D. `1.65 gm//dm^(3)` |
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Answer» Correct Answer - B Density of a gas in found …………. `PM = dRT` `(P_(1))/(d_(1)T_(1))= (P_(2))/(d_(2)T_(2)) implies (2)/(4xx300) = (1.01)/(d_(2)xx273)` `d_(2)= (4xx300xx1.01)/(2xx273) = 2.22 gm//dm^(3)` |
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| 47. |
Which of the following acts as an effective mosquito repellent?1. Citronella2. Alcohol3. Honey4. Turmeric5. |
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Answer» Correct Answer - Option 1 : Citronella The correct answer is Citronella.
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| 48. |
Socket-style API for windows is called ____________(a) wsock(b) winsock(c) wins(d) sockwi |
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Answer» Right option is (b) winsock For explanation: Winsock is a programming interface which deals with input output requests for internet applications in windows OS. It defines how windows network software should access network services. |
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| 49. |
Program errors are known as ....... |
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Answer» Program errors are known as bugs. |
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| 50. |
One who writes program is called ....... |
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Answer» One who writes program is called Programmer |
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