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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.
| 39701. |
Why Diamond is bad conductor of electricity |
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Answer» Diamond is a semiconductor. In order for electrons to conduct electricity, they must overcome an energy barrier known as the band gap. When the electrons obtain energy from an applied voltage, they can jump to the conduction band. This is how semiconductors and insulators conduct electricity,their electrical conductivity is low (< 100 mho/ cm). Generally semiconductors have band gaps around 5 eV (1 eV = 1.6x10e-19 J) or less. Hence, since diamond has a band gap of 5 eV, it is considered a wide-band-gap semiconductor.toms are tetrahedrally coordinated by 3 other carbon atoms.Electricity is conducted in a crystal by electrons that are relatively free. But in diamond, each carbon atom is covalently bonded with four other carbon atoms and there are no free electrons. It is bad conductor of electricity because no free electrons are left to pass electricity |
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| 39702. |
What is meant by oospore ? |
| Answer» An oospore is a thick-walled sexual spore that develops from a fertilized oosphere in some algae, fungi, and Oomycetes. Oospore is a fertilized egg within an oogonium. | |
| 39703. |
Define acquired traits with example. |
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Answer» A trait of an organism which is \'not inherited\' bt develops in response to the environment is called an Acquired trait. These are the traits which are developed in an individual due to special condition .They can\'t be transferred to the progeny.EX-low weight of starving beetles An acquired trait is defined as a characteristic or trait that produces a phenotype that is a result of an environmental influence. Acquired traits are not coded for in the DNA of an individual and therefore cannot be passed down to offspring during reproduction. |
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| 39704. |
Function of optic nerve |
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Answer» Convert the image formed on the retina into electrical signal and the signal to the BRAIN. they send and received message from the brain |
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| 39705. |
Function of retina |
| Answer» Its lens system forms an image on a light sensitive screen called retina | |
| 39706. |
Function of ciliary muscles |
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| 39707. |
The pollen tube enter the ovule through an opening called |
| Answer» Microphyle | |
| 39708. |
Genotype rito of dihybridcross |
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Answer» 1:2:2:4:2:2:1:1:1 1:1:1:1:2:4:2:1:1:1:1 this is the right answer |
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| 39709. |
What is hydro electricity |
| Answer» The energy generated with the help of falling water from dam is called hydro electricity . | |
| 39710. |
What is cyclic hydro carbon ? |
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Answer» There are some hydrocarbons in which the carbon atoms are arranged in the form of ring ( or cyclic) are called cyclic hydro carbon The carbon chain which is in the cyclic form. |
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| 39711. |
Law of refraction |
| Answer» 1 The incident ray normal and refracted ray all lie in a same plane.2 The ratio of sine of angle of incidence to the ratio of angle of refraction. | |
| 39712. |
What is electromagnetic wave |
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| 39713. |
Why change in speed causes change in direction in refraction... |
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| 39714. |
Explain respiratory system in human |
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| 39715. |
How we learn periodic table |
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Answer» By the help from youtube By making sentences By short cuts .....It is very easy and funny to learn .just search on google. |
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| 39716. |
Will reading the ncert book a to z give me 95 percent score? |
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Answer» No it\'s not Yes Since ncert texts (along with exemplar) are the prescribed books of CBSE and the questions framed are from ncert ...Don\'t panic study the textbook in depth and try to frame questions ....U must look for points in the book for certain Q\'s and point them out and one thing important Do make the notes also.. -RATNESH TRIPATHI (JEE faculty at motion institute) |
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| 39717. |
Diffrence bewteen polar covalent and non polar covalent bond |
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| 39718. |
why are lanthanoids and actinoides kept at the bottom of the periodic table. |
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| 39719. |
Dispersion |
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Answer» Separation of white light beam into band of different seven colors called vibgyor is called disperssion Scattering of white light The scattering of white light into its seven constituent colour is known as dispersion of light. Scattering of light Separation of white light into colours. |
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| 39720. |
What is fossil fules |
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| 39721. |
Aloha, captain ng |
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| 39722. |
Why do we clasiify elements |
| Answer» Different elements discovered in different times were found to possess different physical and chemical properties. But it was difficult to study all the information or properties of these elements. Scientists started discovering some pattern in their properties to classify all the known elements in order to make their study easier. That\'s why we classify elements. | |
| 39723. |
Carbon and it\'s compounds |
| Answer» Prefer Dinesh book you will understand very nicely... | |
| 39724. |
What are analogues and homologous organs? |
| Answer» Analogous are those which look similar but their origins are different as wings of bird and homologous are those which look different but perform similar function as limbs of humans and reptiles. | |
| 39725. |
What is ethanoic acid |
| Answer» CH3COOH.. | |
| 39726. |
What is periodicity |
| Answer» | |
| 39727. |
Why copper vessels get a green coat when left exposed to air in rainy season |
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Answer» Corrosion Due to corrksij6 |
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| 39728. |
The process ehich help in perpetuation of a race |
| Answer» Reproduction | |
| 39729. |
Hdgsifbsifnx |
| Answer» | |
| 39730. |
Why aqueous solution of ionic compound able to conduct electricity |
| Answer» Because there free electron which conduct electricity | |
| 39731. |
What are advantage of non conventional sources |
| Answer» 1. Cheaper and Renewable: Most of the Non-conventional Power resources are cheaper and renewable as compared to the conventional sources.2. Scarcity of Fossil Fuels: The overall limitation and scarcity of fossil fuels has given rise to the urgent need for exploiting alternative energy sources.3. Rural Energy Needs: Locally available non-conventional and renewable power resources can meet localized rural energy needs with minimum transportional cost.4. Inexhaustible and Environment friendly: Power from Non-conventional and Renewable is a must in order to reduce carbon dioxide (CO2) emissions of the coal-based power plants. It is inexhaustible in nature and environment friendly.\xa0 | |
| 39732. |
Native state |
| Answer» Gsyfd | |
| 39733. |
electric supply of a house is through a15 ampere fuse when a 2000 watt heater is used in this house |
| Answer» | |
| 39734. |
What is true breeding..??? |
| Answer» True breeding means that the parents will also pass down a specific phenotypic trait to their offspring. Remember that a phenotype is the outward appearance of something. True bred organisms will have a pure genotype (genetic expression of a trait) and will only produce a certain phenotype. | |
| 39735. |
What are hydrogencarbonate? |
| Answer» | |
| 39736. |
What is reducing agents |
| Answer» A substance that bring about reduction by being oxidized.Example -Oxygen and coke (C) | |
| 39737. |
Explain the difference between dispersion of light and scattering of light Pl give practical answers |
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Answer» Monochromatic refer to single particular colour Dispersion of light refers to splitting of light into its seven colours and scattering of light is just scattering of beam of monochromatic light |
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| 39738. |
What is event horizon ? |
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| 39739. |
What is difference between gene and allele |
| Answer» A functional unit of heredity present on chromosome cell nucleus is called gene.One of different forms of a particular gene is called allele. | |
| 39740. |
Draw the structure of phenolphthalein as well as tri nitro toulene |
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| 39741. |
What is monohybrid cross?☺☺ |
| Answer» A cross or breeding between two individuals having one pure breeding contrasting traits, producing all hybrid generation for that chracter is called monohybrid cross.Eg:-Pure Tall Dwarf TT tt \\ / \\ / \\ / \\ / Tt (hybrid tall) | |
| 39742. |
Why does calcium float in water |
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| 39743. |
What is unit of refractive index |
| Answer» No unit is there for refractive index | |
| 39744. |
Why magnetic field lines never intersect eachother? |
| Answer» Magnetic field never intersect each other because if it happens then there will be two tangents at single point which gives different directions and it is not possible. | |
| 39745. |
What is hemoglobin |
| Answer» It\'s a red color pigment present in blood | |
| 39746. |
What is a DNa |
| Answer» /DNA,deoxyribo nucleic acid is present in the nucleus of a cell./Chromosome of a cell contains to inherit the characteristic from the parent to next generation. | |
| 39747. |
What is the importance of VARIATION? ?? |
| Answer» Genetic diversity plays an important role in the survival and adaptability of a species. When a population\'s habitat changes, the population may have to adapt to survive; the ability of the population to adapt to the changing environment will determine their ability to cope with an environmental challenge. | |
| 39748. |
What is epiglottis? What is its function |
| Answer» The epiglottis is a leaf-shaped flap of cartilage located behind the tongue, at the top of the larynx, or voice box. The main function of the epiglottis is to seal off the windpipe during eating, so that food is not accidentally inhaled. | |
| 39749. |
What is lateral inversion? |
| Answer» "Lateral inversion" means the apparent reversal of the mirror image\'s left and right when compared with the object. "Lateral" just means "sideways". | |
| 39750. |
What is the diffrence between heredity and evolution ? |
| Answer» Hereditary is the passing of traits from the parental to offspring through process of sharing genetic information where as evolution is the gradual changes in the heritable characters of a biological population over a successive generations. To get a clear idea about it go through Charles darwin\'s theory of evolution. | |