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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.
| 8201. |
Defination of valency |
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Answer» The no of electron present in the last orbit or shell The combining capacity of atoms. OR The sharing, losing, and gaining of electron. The capacity of an atom to gain or loss of electron The combining capacity of atoms and molequle |
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| 8202. |
What is strip cropp3 |
| Answer» Strip cropping is a method of farming which involves cultivating a field partitioned into long, narrow strips which are alternated in a crop rotation system. It is used when a slope is too steep or when there is no alternative method of preventing soil erosion. The most common crop choices for strip cropping are closely sown crops such as hay, wheat, or other forages which are alternated with strips of row crops, such as corn, soybeans, cotton, or sugar beets | |
| 8203. |
Molecular mass of CH3COOH |
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Answer» Because C(mass)=12uH(mass)=1uSo there are -2carbon =2*12-4hydrogen=4*1-2oxygen=2*16So2*12+4*1+2*16=60g/molUnit of molecular mass is gram per mol(g/mol) 60g/mol |
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| 8204. |
What is the molar mass of the carbon tetrachloride ? ,Chapter = atoms and molecules |
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Answer» The same as the mass of 1 mole of carbon and 2 moles of chlorine gas.Explanation: |
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| 8205. |
Activity solutions chapter 2 |
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| 8206. |
K. W. H. Is equal to |
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Answer» Kilo Watt Hour i.e.1000watt ×3600second The commercial unit of electric energy is kilowatt hour (kW h), commonly known as ‘unit’. 1 kW h = 1000 watt × 3600 second = 3.6 × 106 watt second = 3.6 × 106 joule (J).The kilowatt-hour (symbolized kWh) is a unit of energy equivalent to one kilowatt (1 kW) of power expended for one hour (1 h) of time. |
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| 8207. |
What is mitochondria.explain? |
| Answer» it is power house of the cell. | |
| 8208. |
Definetion of velency |
| Answer» the combinding capicity of the shell is known as valency . and the outermost shell is also known as valency. | |
| 8209. |
Name of ten vectors |
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| 8210. |
Molecules and elements both are made up of elements |
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Answer» But atom and molecule are made of element Yes |
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| 8211. |
Mention the preconditions for a good yield of milk? |
| Answer» Milk production depends, to some extent, on the duration of the lactation period which means the period of milk production after the birth of a calf. | |
| 8212. |
Explain reverberation ? |
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Answer» When sound vibrate many times in huge place this is known as reverberation When the sound vibrate multiple times in a big place The preresistance of sound due to multiple reflections in a big hall is known as reverberation. It can make the sound distorted and blurred. To reduce this good absorbing material is covered in the halls.Hope this will help you. |
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| 8213. |
Write the function of Ear ?? |
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Answer» Following are the important function of the ear:Hearing: The mechanism of hearing involves the following steps:\tThe sound waves pass through the auditory canal and reach the eardrum.\tThe vibrations produced pass through the tympanic membrane to the tympanic cavity.\tThe ear ossicles in the tympanic cavity receive the vibrations and the stapes pushes the oval window in and out.\tThis action is passed on to the organ of corti, the receptor of hearing, that contains tiny hair cells that translate the vibrations into electrical impulse that are transmitted to the brain by sensory nerves.Balance: The eustachian tube and the vestibular complex are the important parts of the ear responsible for balance.\tThe eustachian tube equalizes the air pressure in the middle ear and maintains the balance.\tThe vestibular complex contains receptors that maintain body balance. For hearing . |
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| 8214. |
What are "Nocturnal animal"??? |
| Answer» Nocturnal animals are more active at night than during the day. These animals sleep during the day, often in a burrow or den. Many animals, like desert animals, are nocturnal in order to escape extreme daytime heat. | |
| 8215. |
Differentiate between bilateral and radial symmetry |
| Answer» An animal is said to have bilateral symmetry if it has two equal but opposite right and left halves when cut lengthwise in the middle vertical plane, e.g., frog. On the other hand, an animal is said to have radial symmetry, if it is symmetrical with respect to any plane passing through its longitudinal axis. In other words, any plane passing longitudinally through any diameter divides the body into equal halves, e.g., Hydra. | |
| 8216. |
Quick question paper |
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| 8217. |
Sound follows same law of reflection as light does ? Comment on it |
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Answer» Yes, sound follows the same laws of reflection as that of light because,(i) Angle of incidence of sound is always equal to that of angle of reflection of sound waves.(ii) The direction in which sound is incident, the direction in which it is reflected and normal all lie in the same plane. Yes bro abdhesh , angle of incident is equal to angle of reflection . It also has a normal (if we assume). |
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| 8218. |
How revibration of sound do its amplification |
| Answer» The phenomenon of persistence or prolongation of audible sound after the source has stopped emitting it is called reverberation. In an auditorium or big hall excessive reverberation is highly undesirable. To reduce reverberation, the roof and walls of the auditorium are generally covered with sound-absorbent materials like compressed fibreboard, rough plaster or draperies. | |
| 8219. |
State second law of motion. |
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Answer» The rate change of momentum directly proportional by applied force takes place in the direction in which external force acts. The Second law of motion states that the rate of change of momentum of an object is proportional to the applied external force and takes place in the direction in which external force acts. |
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| 8220. |
What is Oscillations |
| Answer» Oscillatory motion is defined as the to and fro motion of an object from its mean position. The ideal condition is that the object can be in oscillatory motion forever in the absence of friction but in the real\xa0world, this is not possible and the object has to settle into equilibrium. | |
| 8221. |
how to find g of the formula m*g*h if g is not given |
| Answer» Then g=p/mh | |
| 8222. |
How immune system fight against any microbes? |
| Answer» Immune system is formed of WBC cells that produce antibodies against microbes in order to neutralize it.these specialised cells go into action each time when the infected microbes enter the body they also manage to get rid of infection before it assumes major proportion.any vaccine or entry of microbes inside the body act as antigen which create primary immune response . The antigen stimulate the WBC cells that produce antibodies , these antibodies neutralize the effect of antigen and stimulate memory cells to act against future infection. Hope it might be helpful !!! | |
| 8223. |
How many of you want to become a doctor? |
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Answer» Nope Nope |
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| 8224. |
what are milich animals |
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Answer» The animal which give us milk Milch animals are the animals which give us milk |
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| 8225. |
Why rest and motion are called relative terms? |
| Answer» Rest and motion are the relative terms because they depend on the observer’s frame of reference.If an observer is at rest in his or her own frame of reference, but he may be moving in other observer\'s frame of reference. So if two different observers are not at rest with respect to each other, then they too get different results when they observe the motion or rest of a body. | |
| 8226. |
Compare an electon ,proton ,and neutron in respect of charge |
| Answer» An electron have negative charge, that Proton have positive charge and the Newton have not any charge thank you for my answer Think so it will help to u | |
| 8227. |
Write any three features that all Chordates possess |
| Answer» All chordates possess the following features :(i) have a notochord(ii) have a dorsal nerve cord(iii) are triploblastic(iv) have paired gill pouches(v) are coelomate. | |
| 8228. |
What is atomicity of ammonia |
| Answer» The atomicity of ammonia is NH3: Ammonia is a compound of nitrogen and hydrogen with the formula NH3. It is a colourless gas with a characteristic pungent odour. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers. | |
| 8229. |
Who discovered the first living cell? |
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Answer» Robert hooke The cell was first discovered by Robert Hooke in 1665, which can be found to be described in his book Micrographia. In this book, he gave 60 \'observations\' in detail of various objects under a coarse, compound microscope. I |
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| 8230. |
Explain whittker five kingdom |
| Answer» R.H. Whittaker proposed the five kingdom classification in 1969. This classification was based upon certain characters like mode of nutrition, thallus organization, cell structure, phylogenetic relationships and reproduction. This form of kingdom classification includes five kingdoms Monera, Protista, Fungi, Plantae and Animalia. | |
| 8231. |
Property of colloids |
| Answer» (i) In reality, it is heterogeneous but appears homogeneous (ii) It particle diameter is between 1nm-100nm.(iii) It is stable in nature.it particles do not settle at the bettom of container (iv) it\'s particle can not be seen by naked eyes (V) it\'s particle easily passes the filter paper . So colloidal solution can not be separate by filter paper. | |
| 8232. |
Tell the chapter wise weightage of the class 9 science paper |
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| 8233. |
How are clouds formed ? |
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Answer» Tiny droplets grow bigger and heavy by more condensation which ultimately leads to the formation of clouds.Clouds are formed by the process of evaporation and condensation.Water evaporates from water bodies and rises up in the air. This air also gets heated.Hot air carrying water vapour rises up. It cools down as it goes up.Cooling causes condensation of water vapour, which leads to the formation of tiny droplets.\xa0 Clouds are formed by the water vapours present in air .The water vapours combines to form clouds. |
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| 8234. |
Why do other stars appear to move from east to west whereas the pole star apperas to be stationary ? |
| Answer» Pole star appears stationary in the sky when seen from the earth because it is positioned close to the line of Earth\'s Axis projected into space. as such it is the only brightstar whose position relative lead to a rotating earth does not change. | |
| 8235. |
Give an example each of disease caused by fungi,bacteria,virus,protozons(1) |
| Answer» FUNGI - skin infections BACTERIA - typhoid fever, cholera, tuberculosis VIRUS - common cold, influenza, dengue fever PROTOZONS - malaria, kala-azar | |
| 8236. |
1 mole os equal to |
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Answer» 6.022*10^23 6.022 × 10²³ no. of (atoms or molecules or particles) 6.022×10^23 |
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| 8237. |
what do you mean by division of labour |
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Answer» Different parts of human body performs specific different functions such as human body has heart to pump blood, a stomach to digest food etc This is known as division of labour The division of labour is the separation of tasks in any economic system so that participants may specialize. |
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| 8238. |
What is atomacity of an atom? |
| Answer» The number of atoms present in a single molecule is termed as its atomicity. It can be classified into three types.\tThe molecules of many elements are composed of only a single atom of that element. They are termed as monoatomic. For instance, Ar (Argon), He(Helium). So their atomicity is one.\tOn the other hand the molecules of many elements are composed of two atoms of that element. For instance, oxygen can never exist independently and exist as O2 molecule known as diatomic So its atomicity is 2.\tThe molecules of many elements are composed of three atoms of that element. They are termed as triatomic For instance, O3, CO2. So their atomicity is 3. | |
| 8239. |
Will 35Cl and 37Cl have different valencies? Justify your answer... |
| Answer» 35Cl and 37Cl will have same valency. Valency is determined by number of protons or number of electrons. Since the number of protons/electrons are same in both the cases mentioned above, the valencies will be same. ... Here there is a difference in mass numbers due to different number of neutrons in the respective atoms. | |
| 8240. |
Atomic no. Of Rf(Rutherfordium) |
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Answer» 104 RF 117 |
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| 8241. |
Albert Einstein\'s simple experience on 9th standard |
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| 8242. |
what is homogeneous and heterogeneous solution? |
| Answer» Mixture is of two types – homogenous mixture and heterogenous mixture.\tA mixture which has uniform composition and properties throughout its mass is called a homogeneous mixture. Example: All solutions such as sugar solution, salt solution etc.\tA mixture which has a different composition and properties in different parts of their mass is called a heterogeneous mixture. Example: Suspension (sand mixed with salt, sugar in oil) and colloids (milk in water). | |
| 8243. |
What is the postulate s of bohr model |
| Answer» Its give in your ncert Book pg 49 on top | |
| 8244. |
Write a note on plant tissue |
| Answer» Meristematic tissues are growth tissues and found in the growing regions of the plant. According to their position in plant, meristems are apical, lateral and intercalary.When the cells take up a specific role and lose the ability to divide they form a permanent tissue. This process of taking up a permanent shape, size, and a function is called differentiation. Thus, cells of meristematic tissue differentiate to form different types of permanent tissue.\xa0Permanent tissues are of two types – simple permanent tissues and complex permanent tissues. | |
| 8245. |
Law of motion |
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Answer» 1:An object continues to be in rest or uniform motion,unless and until an external unbalanced force acts on it.2:The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of force.3:To every action,there is an equal and opposite reaction. Motion have 3 law |
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| 8246. |
What is an ultrasonography and function |
| Answer» Ultrasonography is a relatively safe diagnostic medical procedure where sound waves are introduced into the body using a transducer. The sound waves bounce off the bones and tissues in the body and produce a black and white image on a monitor. The procedure is safe because it does not use ionizing radiation like an x-ray or CAT scan, which should be avoided in pregnancy. | |
| 8247. |
Cell is a functional unit of life give reason |
| Answer» As You know cell is the basic fundamental , functional unit of life. Human body is made up of cells and each cell have definite work. Same kind of cell with same structure and function lead to the formation of tissue and two or more tissue lead the formation of organ and organ lead to formation of body. Thus, cell is the functional unit of life | |
| 8248. |
What are the features of cardiac muscle |
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Answer» Cardiac muscle cells are found only in the heart.and are specialized to pump powerfully and efficiently throught out our entire life time. four characteristics define cardiac muscle tissue cell. they are involvery and intrinsically controlled. straited branched. l hope this help you Heart, which pumps blood throughout the body, is made up of cardiac muscles. Three\xa0features of cardiac muscle are:(i) Cardiac muscles\xa0are involuntary. They cannot be controlled by will.(ii) Cardiac muscle cells are cylindrical, branched and uninucleate.(iii) Cardiac muscles\xa0show rhythmic contraction and relaxation throughout the life. |
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| 8249. |
Give an example in which a force does positive work |
| Answer» Bull pulling cart | |
| 8250. |
How the water and corbondioxide in and out the cell |
| Answer» By process of diffusion | |