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InterviewSolution
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.
| 551. |
Select an incorrect statement for `F^(+)` bacteriaA. It has F plasmidB. Only plasmic pili are present C. It is considered as donor bacteriumD. It cannot conjugate with another `F^(+)` form |
| Answer» Correct Answer - B | |
| 552. |
Mark the odd one w.r.t. cell wall.A. HalophilesB. MethanogensC. ThermoacidophilesD. Cyanobacteria |
| Answer» Correct Answer - D | |
| 553. |
Select an incorrect statement for `F^(+)` bacteriaA. It has F plasmidB. Only plasmic pili are presentC. It is considered as donor bacteriumD. It cannot conjugate with another `F^(+)` form |
| Answer» Correct Answer - B | |
| 554. |
Select the incorrect statement.A. Cuscuta is a parasitic plantB. Bladderwort and Venus fly trap are examples of insectivorous plants.C. Plantae includes algae, bryophytes, pteridophytes, gymnosperms and angiospermsD. The mode of nutrition in plants is holozoic |
| Answer» Correct Answer - D | |
| 555. |
Heterocysts present in Anabaena is specialised forA. Nitrogen fixationB. Food storageC. FissionD. Sexual reproduction |
| Answer» Correct Answer - A | |
| 556. |
Select the incorrect statement.A. Nostoc and Anabaena have heterocysts for nitrogens fixation.B. Cyanobacteria often form blooms in polluted water bodiesC. Heterotrophic bacteria are more abundant in natureD. The cell wall of Mycoplasma are made up of chitin |
| Answer» Correct Answer - D | |
| 557. |
During favourable conditions bacteria mainly reproduce byA. BuddingB. FragmentationC. SporulationD. Fission |
| Answer» Correct Answer - D | |
| 558. |
Capillitium is present in the sporangium ofA. DictyosteliumB. PolysphondyliumC. PhysarumD. Navicula |
| Answer» Correct Answer - C | |
| 559. |
The value of n (i.e. principal quantum number) for the valence shell of palladium is (atomic number-40) |
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Answer» Correct Answer - 4 Electron configuration for `._(46)Pd" is "[Kr]^(36)4d^(10)`. |
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| 560. |
In a given shell, the order of screeing effect isA. `sgtpgtdgtf`B. `fgtdgtpgts`C. `pltdltsltf`D. dgtfltsgtp` |
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Answer» Correct Answer - A The order of screaning effect in a given shell are in order `sgtpgtdgtf`. |
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| 561. |
Assertion: Shielding effect increases as we go down the group. Reason: More is the number of electrons in the penultimate shell, more is shielding.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not a correct explanation of the assertionC. If assertion is true but reason is falseD. If the assertion and reason both are false |
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Answer» Correct Answer - A Both assertion and reason are true and reason is the correct explanation of assertion. The phenomenon in which the Penultimate Shell (n-1) electrons act as screen or shield in between nucleus and valence shell electrons thereby reducing the effective nuclear charge is known as shielding effect. |
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| 562. |
The atomic radius of elements of which of the following series would be nearly the sameA. Na K Rb CsB. Li Be B CC. Fe Co Ni CuD. F Cl Br l |
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Answer» Correct Answer - C `Fe, Co, Ni, Cu. Due to shielding of d-electrons, the effect of increased nuclear charge due to increase in atomic no. neutralised. Consequently atomic radius remains almost unchanged after chromium. |
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| 563. |
The metal-having highest melting point isA. ChromiumB. TungstenC. DiamondD. Silver |
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Answer» Correct Answer - B Tungsten (W) having highest m.p. |
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| 564. |
Elements of atomic number `6` is placed inA. IV groupB. IV periodC. VI groupD. III group |
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Answer» Correct Answer - A `1s^(2)2s^(2)2p^(2)`-there are 4e^(-)` in valence shell therefore it goes to IV-group. |
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| 565. |
Identify the correct order of the size of the followingA. `Ca^(2+)ltK^(+)ltArltS^(2-)ltCl^(-)`B. `Ca^(2+)ltK^(+)ltArltCl^(-)ltS^(2-)`C. `ArltCa^(2+)ltK^(+)ltCl^(-)ltS^(2-)`D. `Ca^(2+)ltArltK^(+)ltCl^(-)ltS^(2-)` |
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Answer» Correct Answer - B In isoelectronic species radius decreases on increasing effective nuclear charge. |
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| 566. |
Which pair of atomic numbers represent s-block elements?A. 7, 15B. 6, 12C. 9, 17D. 3, 12 |
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Answer» Correct Answer - D Last electron goes to s-subshell. |
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| 567. |
The element X, Y, Z and T have the indicated electronic configurations. Starting with the innermost shell, which is the most metallic elementA. X=2,8,4B. Y=2,8,8C. Z=2,8,8,1D. T=2,8,8,7 |
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Answer» Correct Answer - C Z=2,8,8,1. `because` it would donate `e^(-)` more easily. |
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| 568. |
Which of the following does not represent the correct order of the property indicated?A. `Sc^(3+)gtCr^(3+)gtFe^(3+)gtMn^(3+)` : ionic radiiB. `ScltTiltCrltMn` : DensityC. `Mn^(2+)gtNi^(2+)ltCo^(2+)ltFe^(2+)` : ionic radiiD. `FeOltCaOgtMnOgtCuO` : Basic nature |
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Answer» Correct Answer - A `Sc^(3+)gtCr^(3+)gtFe^(3+)gtMg^(3+)` the correct order is `Cr^(+3)gtMn^(+3)gtFe^(+3)gtSc^(+3)` |
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| 569. |
In any period, the valency of an element with respect to oxygenA. Increases one by one from IA to VIIAB. Decreases one by one from IA to VIIAC. Increases one by one from IA to IVA and then decreases from VA to VIIA one by oneD. Decreases one by one from IA to IVA and then increases from VA to VIIA one by one |
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Answer» Correct Answer - C Oxidizing power decreases down the group. |
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| 570. |
Which of the following is not the correct arrangement according to the property indicated against it ?A. `Al^(3+)ltMg^(2+)ltNa^(+)ltF^(-)` : Increasing ionic sizeB. `BltCltNltO` : Increasing first ionisation enthalpyC. `IltBrltFltCl` : Increasing electron gain enthalpy (with negative sign)D. `LiltNaltKltRb` : Increasing metallic radius |
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Answer» Correct Answer - B `BltCltNltO`, When we move from B to O in a periodic table the first ionisation enthalpy increases due to the attraction of nucleus towards the outermost electron and I.E. of `NgtO`. |
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| 571. |
The heaviest atom amongst the following isA. UB. RaC. PbD. Hg |
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Answer» Correct Answer - A `UgtRagtPbgtHg` |
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| 572. |
Which of the following statement is correct with respect to the property of elements with an increase in atomic number in the carbon family (group 14)?A. Atomic size decreaseB. Ionisation energy increaseC. Metallic character decreaseD. Stability of +2 oxidation state increase |
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Answer» Correct Answer - D As we go down the group inertness of `ns^(2)` pair increase hence tendency to exhibit +2 oxidation state increases and that of +4 oxidation state decreases. |
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| 573. |
The elements with atomic number 10, 18, 36, 54 and 86 are allA. Light metalsB. Inert gasesC. HalogensD. Rare-earths |
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Answer» Correct Answer - B Inert gases, these have `ns^(2)np^(6)` configuration. |
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| 574. |
the tenth elements in the periodic table resembles with theA. First periodB. Second periodC. Fourth groupD. Ninth group |
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Answer» Correct Answer - B Each period consists of a series of elements whose atom have the same principal quantum no. (n) of the outer most shell i.e., in second period n=2, this shell has four orbitals (one 2s and three 2p) which can have eight electrons, hence second period contains 8 elements from atomic no.3 to 10. |
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| 575. |
The element with electronic configuration `1s^(2)2s^(2)2p^(6)3s^(2)` isA. A metalB. A non-metalC. An inert gasD. A metalloid |
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Answer» Correct Answer - A The cofiguration represents an alkaline earth metals. |
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| 576. |
The electronic configuration of an element `X` is `1s^(2),2s^(2),2p^(6),3s^(2),3p^(3)`. What is the atomic number of the element which is just below the element `X` in the periodic table?A. 33B. 34C. 31D. 49 |
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Answer» Correct Answer - A `33-1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(3)` |
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| 577. |
A retrovirus on injecting its RNA into host cell starts synthesing a single (-)ve strand of DNA which is calledA. cDNA(copy DNA)B. sDNA (synthetic DNA)C. r-DNA (reverse DNA)D. reverse RNA |
| Answer» Correct Answer - A | |
| 578. |
A peculiar odour found in marshy areas and cow sheds is of gas produced byA. MucoplasmaB. ArchaebacteriaC. Slime mouldsD. Cyanobacteria |
| Answer» Correct Answer - B | |
| 579. |
The cell wall encloses the peripheral layer of cytoplasm surrounded a large central vacuole inA. EuglenaB. DiatomsC. AmoebaD. Aulosira |
| Answer» Correct Answer - B | |
| 580. |
Read the statements carefully a. Hartig net is the network of intracellular mycellium of Boletus b. Ectomycorrhiza forms ten percent of total mycorrhiza c. Fungal partner of endomycorrhiza belongs to zygomycetes or phycomycetesA. Only a & c are correctB. Only b & c are correctC. Only c is correctD. All are correct |
| Answer» Correct Answer - B | |
| 581. |
BGA (blue green algae) are included in which of the following groups ?A. BryophytesB. ProkaryotesC. ProtistaD. Fungi |
| Answer» Correct Answer - B | |
| 582. |
Choose the major characteristics of five kingdom system. I. it was developed by RH Whittaker. II. It is divided into five kingdom system based on cell structure, body structure, nutrition , phylogenetic relationship and life style. III. It is given by Copeland. IV. it is divided into four divisions.A. I and IIB. III and IVC. I and IVD. II and IV |
| Answer» Correct Answer - A | |
| 583. |
DNA in bacteriophages is double stranded (ds) and linear and lies inA. headB. tailC. head and tail bothD. tail tube |
| Answer» Correct Answer - A | |
| 584. |
Organisms called Methanogens are most abundant in aA. Hot springB. Sulphur rockC. Cattle yardD. Polluted stream |
| Answer» Correct Answer - C | |
| 585. |
Identify A, B and C in given diagram. A. A = Mucor, B = Aspergillus, C = AgaricusB. A = Mucor, B = Agaricus, C = AspergillusC. A = Agaricus, B = Mucor, C = AspergillusD. A = Agaricus, B = Aspergillus, C = Mucor |
| Answer» Correct Answer - A | |
| 586. |
The members of which group are commonly known as sac fungi?A. PhycomycetesB. DeuteromycetesC. BasidomycetesD. Ascomycetes |
| Answer» Correct Answer - D | |
| 587. |
Acellular slime moulds showA. Haploid uninucleate plasmodiumB. Naked sporangiaC. Autotrophic nutritionD. Isogamous type reproduction |
| Answer» Correct Answer - D | |
| 588. |
Consider the following statements and select correct set of features w.r.t. the life cycle of acellular slime moulds a. Haploid vegetative stage is myxamoebae b. Diploid vegetative stage as plasmodium c. Capillitium d. Photosynthetic protists e. Sporic meiosis f. Isogamous sexual reproduction g. Anisogamous sexual reproduction with zygotic meiosisA. a, c, gB. b, c, gC. b, d, e, fD. b, c, e, f |
| Answer» Correct Answer - D | |
| 589. |
The primitive prokaryotes responsibel for the production of biogas from the dung of ruminant animals includeA. EubacteriaB. HalophilesC. ThermoacidophilesD. Methanogens |
| Answer» Correct Answer - D | |
| 590. |
For retting of jute, the fermenting microbe used isA. Helicobacter pyloriB. Methophilic bacteriaC. Streptococcus lactinD. Butyric acid bacteria |
| Answer» Correct Answer - D | |
| 591. |
The most well studied bacterial- plant relationship is that ofA. Cyanobacterial symbiosis with some aquatic fernsB. Gall formation on certain angiosperms by AgrobacteriumC. Nodulations of Sesbania stems by nitrogen fixing bacteriaD. Plant growth stimulation by phosphate-solubilising bacteria |
| Answer» Correct Answer - B | |
| 592. |
The Nobel Prize of 1997 went to____for the study of prions (the causal agents of scrapie and CJD).A. GajdusekB. PrusinerC. DulbeccoD. Bishop & Varmus |
| Answer» Correct Answer - B | |
| 593. |
Arrange `S, P` and `As` in order of increasing ionisation energy.A. `SltPltAs`B. `PltSltAs`C. `AsltSltP`D. `AsltPltS` |
| Answer» Correct Answer - C | |
| 594. |
Among the following, the third ionisation energy is highest forA. MagnesiumB. BoronC. BerylliumD. Aluminium |
| Answer» Correct Answer - C | |
| 595. |
Assertion: `E^(@)` for `Mn^(3+)//Mn^(2+)` is more positive than `Cr^(3+)//Cr^(2+)` Reason: The third ionisation energy of `Mn` is larger than that of `Cr`.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not a correct explanation of the assertionC. If assertion is true but reason is falseD. If the assertion and reason both are false |
| Answer» Correct Answer - B | |
| 596. |
The ionisation energy of an element isA. The same as the electron affinity of the elementB. Equal in magnitude but of opposite sign to the electron affinity of the elementC. The energy released when an electron is added to an atom of the elementD. The energy required to remove the outermost electron of an atom of the element |
| Answer» Correct Answer - D | |
| 597. |
Biological organisation starts withA. Atomic levelB. Submicroscopic molecular levelC. Cellular levelD. Organismic level |
| Answer» Correct Answer - B | |
| 598. |
Which of the following is a slime mouldA. AnabaenaB. RhizopusC. PhysarumD. Thiobacillus |
| Answer» Correct Answer - C | |
| 599. |
Floral features are commonly used for identification of angiosperms becauseA. Reproductive parts are more conservativeB. Flower can be safely pressedC. Flower are nice to work withD. Flowers have various colours and scents. |
| Answer» Correct Answer - A | |
| 600. |
The famous Irish famine is related to a disease of potato known as:-A. Late blight of potatoB. Early blight of potatoC. Dry rot of potatoD. Potato scab |
| Answer» Correct Answer - A | |