661 + Interview Questions in CLASS-12 IN GENERAL AWARENESS Page 6 InterviewSolution

251.	Which of the order for ionisation energy is correctA. `BegtBgtCgtNgtO`B. `BltBeltCltOltN`C. `BltBeltCltNltO`D. `BltBeltNltCltO`
Answer» Correct Answer - B Ionisation energy increases across the period but due to stable half filled configuration of VA group, its I.E. is more than VI-A group.

Discussion

252.	Which of the following has the largest sizeA. `S^(2-)`B. `Se^(2-)`C. `O^(2-)`D. `Te^(2-)`
Answer» Correct Answer - D Size increases down the group.

Discussion

253.	The first ionisation potentials (eV) of `Be` and `B` respectively areA. 8.29eV, 9.32eVB. 9.32eV, 9.32eVC. 8.29eV, 8.29eVD. 9.32eV, 8.29eV
Answer» Correct Answer - D First I.P of `Be gtB` because of stable `ns^(2)` configuration.

Discussion

254.	Difference between S and `S^(2-)` as `S^(2-)` hasA. Larger radii and larger sizeB. Smaller radii and larger sizeC. Larger radii and small sizeD. Smaller radii and small size
Answer» Correct Answer - A Difference between `S and S^(2-)` implies larger radii and larger size of `S^(2-)`. As the radii of the anion is always larger than the atomic radii of its parent atom. In an anion as electron or electrons are added to the neutral atom the nuclear charge acts on more electrons so that each electron is held less tightly and thereby the electron cloud expands.

Discussion

255.	Which one of the following indicates the correct order of atomic sizeA. `BegtFgtCgtNe`B. `BeltCltFltNe`C. `BegtCgtFgtNe`D. `FltNeltBeltC`
Answer» Correct Answer - C `BegtCgtFgtNe`. Atomic size decreases across a period.

Discussion

256.	The correct order of atomic radii in group 13 elements isA. `BltAlltInltGaltTl`B. `BltAlltGaltInltTl`C. `BltGaltAlltTlltIn`D. `BltGaltAlltInltTl`
Answer» Correct Answer - D In group 13 due to transition contraction `[Al gt Ga]`.

Discussion

257.	the elements on the right side of the periodic table areA. MetalssB. MetalloidsC. Non-metalsD. Transition elements
Answer» Correct Answer - C Elements on the right side of the periodic table are p-block. Mostly non-metals.

Discussion

258.	Point out the wrong statement On moving horizontally from left to right across a period in the periodic tableA. Metallic character decreasesB. Electronegativity increasesC. Gram atomic volume first decreases and then increasesD. Size of the atoms increases for normal elements
Answer» Correct Answer - D Size of elements decreases across a period.

Discussion

259.	Increase in atomic size down the group is due toA. Increase in number of electronsB. Increase in number of protons and neutronsC. Increase in number of protonsD. Increase in number of protons, neutrons and electrons
Answer» Correct Answer - A Increase in atomic size down the group is due to increase in number of electrons.

Discussion

260.	Which of the following is mainly produced by the activity of anaerobic bacteria on sewageA. Marsh gasB. Laughing gasC. PropaneD. Mustard gas
Answer» Correct Answer - A

Discussion

261.	A system of classification in which a large number of traits are considered isA. Artificial systemB. Phylogenetic systemC. Synthetic systemD. Natural system.
Answer» Correct Answer - D

Discussion

262.	Which one of the following statements is wrong ?A. Phycomycetes are also called algal fungiB. Cyanobacteria are also called blue-green algaeC. Golden algae are also called desmidsD. Eubacteria are also called false bacteria
Answer» Correct Answer - D

Discussion

263.	Select the wrong statement.A. Bacterial cell wall is made up of peptidioglycanB. Pili and fimbriae are mainly involved in motility of becterial cellsC. Cyanobacteria lack flagellated cellsD. Mycoplasma is a wall-less microorganism
Answer» Correct Answer - B

Discussion

264.	Methanogens belong toA. EubacteriaB. ArchaebacteriaC. DinoflagellatesD. Slime moulds
Answer» Correct Answer - B

Discussion

265.	For the first time, the bacteria were observed byA. Robert KochB. A.V. LeeuwenhoekC. W.H. StanleyD. Louis Pasteur
Answer» Correct Answer - B

Discussion

266.	Coloured salts are formed byA. Alkali metalsB. LanthanidesC. ActinidesD. Transition metals
Answer» Correct Answer - D Due to presence of vacant d-orbitals and they show d-d transition.

Discussion

267.	The correct enegry value order isA. ns np nd(n-1) fB. ns np(n-1)d(n-2)fC. ns np(n-1)d(n-1)fD. ns(n-1)d n(n-1)f
Answer» Correct Answer - B Higher the (n+l) value higher is the energy associated with orbitals.

Discussion

268.	The ionic conductance of the following cations in a given concentration is in the orderA. `Li^(+)ltNa^(+)gtK^(+)ltRb^(+)`B. `Li^(+)gtNa^(+)gtK^(+)gtRb^(+)`C. `Li^(+)ltNa^(+)gtK^(+)gtRb^(+)`D. `Li^(+)=Na^(+)ltK^(+)ltRb^(+)`
Answer» Correct Answer - A With the increase in size of cation the size of the hydrated ion decreases hence ionic conductance increases.

Discussion

269.	(c) The stunted, unlucky heir of twisted bones means the boy _____________. (i) has an inherited disability (ii) was short and bony
Answer» (i)has an inherited disability

Discussion

270.	Ultimate branches of conidiophore in Penicillium isA. RamiB. PhialideC. SterigmataD. Metulae
Answer» Correct Answer - D

Discussion

271.	Asci are not organised into ascocarps inA. True yeastB. Drosophila of plant kingdomC. Pigmented mouldD. Morels
Answer» Correct Answer - A

Discussion

272.	Choose incorrect match w.r.t. different classes of fungiA. Oomycetes - zoospore - gametic - copulationB. Zygomycetes - sporangiospore - zygophoreC. Ascomycetes - conidia - monokaryotic aseptate myceliumD. Phycomucetes - algal and conjugation fungi - coenocytic mycelium
Answer» Correct Answer - C

Discussion

273.	With reference to concept of ionisation potential, which one of the following sets are correctA. `UgtKgtCs`B. `BgtUgtK`C. `CsgtUgtB`D. `CsltUltK`
Answer» Correct Answer - A

Discussion

274.	Which of the following species has lowest ionisation potentailA. OB. `O_(2)`C. `O_(2)^(+)`D. `O_(2)^(-)`
Answer» Correct Answer - D

Discussion

275.	What is absent in virusesA. DNAB. RNAC. Proteins and enzymesD. Cytoplasm & membranes
Answer» Correct Answer - D

Discussion

276.	Unicelluler animals are placed in the kingdomA. AnimalsB. ProtistaC. MoneraD. Metaphyta
Answer» Correct Answer - B

Discussion

277.	What are the sex organs provided in some bacteria ?A. Sex piliB. PlasmidC. Circular DNAD. Gametes
Answer» Correct Answer - A

Discussion

278.	Growth is indefinite inA. MoneraB. ProtistaC. PlantaeD. Animalia.
Answer» Correct Answer - C

Discussion

279.	Organs are external inA. AnimalsB. PlantsC. FungiD. Protista.
Answer» Correct Answer - B

Discussion

280.	Animals of which of the following kingdom do not possess cell wall ?A. MoneraB. ProtistaC. AnimaliaD. Plantae
Answer» Correct Answer - C

Discussion

281.	Fungi possessA. Holozoic nutritionB. Holophytic nutritionC. Ingestive nutritionD. Absorptive nutrition.
Answer» Correct Answer - D

Discussion

282.	Where karyogamy and meiosis take place in basidiomycetes ?
Answer» Correct Answer - Basidium

Discussion

283.	Name the connecting link between living and non-living.
Answer» Correct Answer - Viruses

Discussion

284.	Assertion : Kingdom -Monera is also known as kingdom- Prokaryota. Reason : Monera cells lack membrane bound cell organellus.A. Both Assertion and Reason are true, but Reason is the correct explanation of Asseration.B. Both Asseration and Reason are true , but Reason is not the correct epxlantaion of Asseration.C. Asseration is true , but Reason is falseD. Asseration is false , but Reason is true
Answer» Correct Answer - B Kingdom -Monera is also known as kingdom -Prokaryota because it includes all prokaryotes , i.e., the most ancient, the smallest , the simplest etc.

Discussion

285.	Smallest free living organism isA. VirusB. ViroidC. MycoplasmaD. Prions
Answer» Correct Answer - C

Discussion

286.	Write the name of an unicellular fungi ?
Answer» Correct Answer - Yeast

Discussion

287.	Name the group to which bracket fungi belong.
Answer» Correct Answer - Basidiomycetes

Discussion

288.	Give two examples of insectivorous plant.
Answer» Bladderwort and Venus fly trap.

Discussion

289.	All viruses are entirelyA. obligate parasitesB. obligate saprophyteC. facultative parasitesD. non livings
Answer» Correct Answer - A

Discussion

290.	What are coprophilous fungi ?
Answer» The fungi which grow on dung, are called coprophilous.

Discussion

291.	Chemically viruses areA. carbohydratesB. glycoproteinsC. lipopolysaccharidesD. nucleoproteins
Answer» Correct Answer - D

Discussion

292.	The term virus was coined byA. PasteurB. BeijerinckC. Ee/useD. Mayer
Answer» Correct Answer - A Pasteur (1880) used the term virus for any unknown agent that causes some disease. Beijerinck (1898) used this term for the causative agent of Tabacco mosaic disease.

Discussion

293.	In absorptive heterotrophyA. Solid organic food is obtained from outsideB. Liquid organic food is got from outsideC. Inorganic raw materials are obtainedD. Energy is absorbed from sun.
Answer» Correct Answer - B

Discussion

294.	The term biosystematic was coined byA. LinnaeusB. Engler and PrantlC. Camp and GillyD. Bentham and Hooker.
Answer» Correct Answer - C

Discussion

295.	The term procaryonta and eucaryonta were coined byA. LamarckB. FottC. De CandolleD. Linnaeus.
Answer» Correct Answer - B

Discussion

296.	Animals which are fixed like plants areA. AnnelidsB. SpongesC. CoralsD. Both B and C
Answer» Correct Answer - D

Discussion

297.	Anoxygenic photosynthesis is characteristic ofA. RhodospirillumB. SpirogyraC. ChlamydomonasD. Ulva
Answer» Correct Answer - A

Discussion

298.	Organisms in which cell wall develops during the reproductive phase areA. MycoplasmaB. BacteriaC. Slime MouldsD. Both B and C
Answer» Correct Answer - C

Discussion

299.	ASSIGNMENT1. What are solids?2. Distinguish between Amorphous solids and crystalline solids.3. Discuss three classes of crystalline solid you know.
Answer» 1. A solid is a state of matter characterized by particles arranged such that their shape and volume are relatively stable. The constituents of a solid tend to be packed together much closer than the particles in a gas or liquid. The reason a solid has a rigid shape is that the atoms or molecules are tightly connected via chemical bonds. The bonding may produce either a regular lattice (as seen in ice, metals, and crystals) or an amorphous shape (as seen in glass or amorphous carbon). A solid is one of the four fundamental states of matter, along with liquids, gases, and plasma. 2. Crystalline solids have regular ordered arrays of components held together by uniform intermolecular forces, whereas the components of amorphous solids are not arranged in regular arrays. 3. IONIC SOLIDS - DEFINITION Ionic Solids are solids composed of oppositely charged ions. They consist of positively charged cations and negatively charged anions .When Ionic Solids are dissolved in water the cations and the anions separate, they become free to move in the water allowing the solution to conduct electrical current. e.g NaCl, ZnS MOLECULAR SOLIDS - DEFINITION A molecular solid is a solid composed of molecules held together by the van der Waals forces. Because these dipole forces are weaker than covalent or ionic bonds, molecular solids are soft and have relatively low melting temperature. There are three types of molecular solids: Non-polar molecular solids Polar molecular solids Hydrogen-bonded molecular solids. Examples are HCl, F, O, N CHARACTERISTICS OF NON-POLAR MOLECULAR SOLIDS - DEFINITION The crystalline solids in which the constituent particles are either atoms like those of noble gases or non-polar molecules.The force holding molecules are vanderwaal forces. The main characteristics are: They are non-conductors of electricity They are generally soft They have low melting and boiling point Examples are H₂ ,Cl₂

299.

ASSIGNMENT1. What are solids?2. Distinguish between Amorphous solids and crystalline solids.3. Discuss three classes of crystalline solid you know.

Answer»

1. A solid is a state of matter characterized by particles arranged such that their shape and volume are relatively stable. The constituents of a solid tend to be packed together much closer than the particles in a gas or liquid. The reason a solid has a rigid shape is that the atoms or molecules are tightly connected via chemical bonds. The bonding may produce either a regular lattice (as seen in ice, metals, and crystals) or an amorphous shape (as seen in glass or amorphous carbon). A solid is one of the four fundamental states of matter, along with liquids, gases, and plasma.

2. Crystalline solids have regular ordered arrays of components held together by uniform intermolecular forces, whereas the components of amorphous solids are not arranged in regular arrays.

3. IONIC SOLIDS - DEFINITION
Ionic Solids are solids composed of oppositely charged ions. They consist of positively charged cations and negatively charged anions .When Ionic Solids are dissolved in water the cations and the anions separate, they become free to move in the water allowing the solution to conduct electrical current. e.g NaCl, ZnS

MOLECULAR SOLIDS -

DEFINITION
A molecular solid is a solid composed of molecules held together by the van der Waals forces. Because these dipole forces are weaker than covalent or ionic bonds, molecular solids are soft and have relatively low melting temperature.
There are three types of molecular solids:
Non-polar molecular solids
Polar molecular solids
Hydrogen-bonded molecular solids. Examples are HCl, F, O, N

CHARACTERISTICS OF NON-POLAR MOLECULAR SOLIDS -

DEFINITION
The crystalline solids in which the constituent particles are either atoms like those of noble gases or non-polar molecules.The force holding molecules are vanderwaal forces.

The main characteristics are:
They are non-conductors of electricity
They are generally soft
They have low melting and boiling point
Examples are H₂ ,Cl₂

Discussion

300.	Which one of the following matches is correct ?
Answer» Correct Answer - 3

Discussion

Explore topic-wise InterviewSolutions in .

Which of the order for ionisation energy is correctA. `BegtBgtCgtNgtO`B. `BltBeltCltOltN`C. `BltBeltCltNltO`D. `BltBeltNltCltO`

Which of the following has the largest sizeA. `S^(2-)`B. `Se^(2-)`C. `O^(2-)`D. `Te^(2-)`

The first ionisation potentials (eV) of `Be` and `B` respectively areA. 8.29eV, 9.32eVB. 9.32eV, 9.32eVC. 8.29eV, 8.29eVD. 9.32eV, 8.29eV

Difference between S and `S^(2-)` as `S^(2-)` hasA. Larger radii and larger sizeB. Smaller radii and larger sizeC. Larger radii and small sizeD. Smaller radii and small size

Which one of the following indicates the correct order of atomic sizeA. `BegtFgtCgtNe`B. `BeltCltFltNe`C. `BegtCgtFgtNe`D. `FltNeltBeltC`

The correct order of atomic radii in group 13 elements isA. `BltAlltInltGaltTl`B. `BltAlltGaltInltTl`C. `BltGaltAlltTlltIn`D. `BltGaltAlltInltTl`

the elements on the right side of the periodic table areA. MetalssB. MetalloidsC. Non-metalsD. Transition elements

Point out the wrong statement On moving horizontally from left to right across a period in the periodic tableA. Metallic character decreasesB. Electronegativity increasesC. Gram atomic volume first decreases and then increasesD. Size of the atoms increases for normal elements

Increase in atomic size down the group is due toA. Increase in number of electronsB. Increase in number of protons and neutronsC. Increase in number of protonsD. Increase in number of protons, neutrons and electrons

Which of the following is mainly produced by the activity of anaerobic bacteria on sewageA. Marsh gasB. Laughing gasC. PropaneD. Mustard gas

A system of classification in which a large number of traits are considered isA. Artificial systemB. Phylogenetic systemC. Synthetic systemD. Natural system.

Which one of the following statements is wrong ?A. Phycomycetes are also called algal fungiB. Cyanobacteria are also called blue-green algaeC. Golden algae are also called desmidsD. Eubacteria are also called false bacteria

Select the wrong statement.A. Bacterial cell wall is made up of peptidioglycanB. Pili and fimbriae are mainly involved in motility of becterial cellsC. Cyanobacteria lack flagellated cellsD. Mycoplasma is a wall-less microorganism

Methanogens belong toA. EubacteriaB. ArchaebacteriaC. DinoflagellatesD. Slime moulds

For the first time, the bacteria were observed byA. Robert KochB. A.V. LeeuwenhoekC. W.H. StanleyD. Louis Pasteur

Coloured salts are formed byA. Alkali metalsB. LanthanidesC. ActinidesD. Transition metals

The correct enegry value order isA. ns np nd(n-1) fB. ns np(n-1)d(n-2)fC. ns np(n-1)d(n-1)fD. ns(n-1)d n(n-1)f

The ionic conductance of the following cations in a given concentration is in the orderA. `Li^(+)ltNa^(+)gtK^(+)ltRb^(+)`B. `Li^(+)gtNa^(+)gtK^(+)gtRb^(+)`C. `Li^(+)ltNa^(+)gtK^(+)gtRb^(+)`D. `Li^(+)=Na^(+)ltK^(+)ltRb^(+)`

(c) The stunted, unlucky heir of twisted bones means the boy _____________. (i) has an inherited disability (ii) was short and bony

Ultimate branches of conidiophore in Penicillium isA. RamiB. PhialideC. SterigmataD. Metulae

Asci are not organised into ascocarps inA. True yeastB. Drosophila of plant kingdomC. Pigmented mouldD. Morels

Choose incorrect match w.r.t. different classes of fungiA. Oomycetes - zoospore - gametic - copulationB. Zygomycetes - sporangiospore - zygophoreC. Ascomycetes - conidia - monokaryotic aseptate myceliumD. Phycomucetes - algal and conjugation fungi - coenocytic mycelium

With reference to concept of ionisation potential, which one of the following sets are correctA. `UgtKgtCs`B. `BgtUgtK`C. `CsgtUgtB`D. `CsltUltK`

Which of the following species has lowest ionisation potentailA. OB. `O_(2)`C. `O_(2)^(+)`D. `O_(2)^(-)`

What is absent in virusesA. DNAB. RNAC. Proteins and enzymesD. Cytoplasm & membranes

Unicelluler animals are placed in the kingdomA. AnimalsB. ProtistaC. MoneraD. Metaphyta

What are the sex organs provided in some bacteria ?A. Sex piliB. PlasmidC. Circular DNAD. Gametes

Growth is indefinite inA. MoneraB. ProtistaC. PlantaeD. Animalia.

Organs are external inA. AnimalsB. PlantsC. FungiD. Protista.

Animals of which of the following kingdom do not possess cell wall ?A. MoneraB. ProtistaC. AnimaliaD. Plantae

Fungi possessA. Holozoic nutritionB. Holophytic nutritionC. Ingestive nutritionD. Absorptive nutrition.

Where karyogamy and meiosis take place in basidiomycetes ?

Name the connecting link between living and non-living.

Smallest free living organism isA. VirusB. ViroidC. MycoplasmaD. Prions

Write the name of an unicellular fungi ?

Name the group to which bracket fungi belong.

Give two examples of insectivorous plant.

All viruses are entirelyA. obligate parasitesB. obligate saprophyteC. facultative parasitesD. non livings

What are coprophilous fungi ?

Chemically viruses areA. carbohydratesB. glycoproteinsC. lipopolysaccharidesD. nucleoproteins

The term virus was coined byA. PasteurB. BeijerinckC. Ee/useD. Mayer

In absorptive heterotrophyA. Solid organic food is obtained from outsideB. Liquid organic food is got from outsideC. Inorganic raw materials are obtainedD. Energy is absorbed from sun.

The term biosystematic was coined byA. LinnaeusB. Engler and PrantlC. Camp and GillyD. Bentham and Hooker.

The term procaryonta and eucaryonta were coined byA. LamarckB. FottC. De CandolleD. Linnaeus.

Animals which are fixed like plants areA. AnnelidsB. SpongesC. CoralsD. Both B and C

Anoxygenic photosynthesis is characteristic ofA. RhodospirillumB. SpirogyraC. ChlamydomonasD. Ulva

Organisms in which cell wall develops during the reproductive phase areA. MycoplasmaB. BacteriaC. Slime MouldsD. Both B and C

ASSIGNMENT1. What are solids?2. Distinguish between Amorphous solids and crystalline solids.3. Discuss three classes of crystalline solid you know.​​​​​​

Which one of the following matches is correct ?

ASSIGNMENT1. What are solids?2. Distinguish between Amorphous solids and crystalline solids.3. Discuss three classes of crystalline solid you know.