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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.
| 56501. |
Why do we have different types of blood groups? |
| Answer» Human blood types most likely came to exist to fend off infectious diseases. ... Type O-negative blood is known as the "universal donor" because it lacks the molecules that would provoke that reaction (the "negative" means it lacks another type of surface molecule, known as the Rh antigen). | |
| 56502. |
Mana suna ha ki jald hi 9 class ma hi streams ka distribution hoga in incoming days |
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Answer» My tutor tells us No not at all How do you know or who told you! What?? Is i right |
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| 56503. |
What do you mean myopia |
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Answer» *blurry. Nearsightedness(myopia) is a common vision condition in which you can see object near to clearly but objects farther away are burry. A condition in which close objects appear clearly, but far ones don\'t. |
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| 56504. |
What are the benefits of cintrol and coordination in human body as well as plant? Specify briefly |
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| 56505. |
How does the heart produce luv dub sound? |
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Answer» When the blood moves auricles to ventricles with a huge force and when the heart contracts or relax , that time it produces luv dub sound I want the views of students not the Google. The “ lub” is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,” dub” or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole. How?? Force of blood |
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| 56506. |
In which part fertilisation takes place |
| Answer» A pregnancy starts with fertilization, when a woman\'s egg joins with a man\'s sperm. Fertilization usually takes place in a fallopian tube that links an ovary to the uterus. If the fertilized egg successfully travels down the fallopian tube and implants in the uterus, an embryo starts growing. | |
| 56507. |
Covert 40 degree celcius to ferienhieght scale |
| Answer» | |
| 56508. |
I want notes on chapter carbon |
| Answer» Vist on the "www. Cbse. Ni . Com" and download the pdf | |
| 56509. |
Name two non metal oxide which turn blue Litmus solution red in acidic medium? |
| Answer» Nitrogen oxide and nitrous oxide | |
| 56510. |
Moon is luminous or non liminious object explain ? |
| Answer» It is a non luminous object as it does not have its own light . The moonlight that we see is the reflected light of sun. ? | |
| 56511. |
Write chemical formula of quick lime? |
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Answer» Cao cao CaO Ca0 Cao |
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| 56512. |
What is use of noble gases and what is Nobel gases? Write his chemical equations . |
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Answer» The group 18 elements are called as inert gases, rare gases and also noble gases. These gases are so called due to the stability of these elements. This stability is due to the completely filled outermost shells of the elements. The inert gases are used in various applications irrespective of their inert or scarcely reactive nature.Uses of noble gases:\tIn metallurgical processes, argon is widely used in order to provide the necessary inert atmosphere. This inert atmosphere plays an important role in welding titanium, aluminum, stainless steel, and megnesium. It is also used in the production of titanium.\tA limited amount of argon is used in germanium and silicon crystals which are used in electric light bulbs, transistors etc.\tThe boiling point of helium is the least when compared to any other liquid. It is used to obtain the lowest temperatures required in lasers.\tHelium is used in nuclear reactors as a cooling gas and used as a flow-gas in liquid-gas chromatography. It finds its application in airships and helium balloons. Noble gas are inert gases they are at right hand side of periodic table and do not easily react with other element |
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| 56513. |
Imp.ques in sci ch=12 and 13 |
| Answer» | |
| 56514. |
define double fertilisation |
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Answer» When the pollen grains enters the embryo sac through the micropyle they fuse with the germ cell as well as the secondary nucleus this fusion with both the cells are termed as double fertilisation. Fertilisation is the process of fussion of male and female gametes. In plants transfer of pollen grains from stigma to ovary. For this to happen a tube grows out of the pollen grain. The pollen travels through this tube through the style to reach ovary. The pollen tube enters the ovary through an opening called micropyle. Here it releases\xa02 male gametes in the embryo sac in which one male gamete fuses with one female gamete. This is known as syngamy. The other male gamete fuses with two other polar nuclei. This is known as triple fusion. Syngamy along with triple fusion is defined as double fusion. |
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| 56515. |
What is amalgam ? |
| Answer» Amalgam : An alloy of mercury metal with one or more other metal is called amalgam. Solution of sodium metal in liquid mercury is called sodium amalgam. An amalgam is an alloy of mercury with another metal. Almost all metals can form amalgams with mercury, | |
| 56516. |
Oxidising and reducing agents |
| Answer» An oxidising agent (also called as an oxidant) is a reactant which brings about the oxidation of the other reactant in a chemical reaction and itself undergoes reduction. Conversely, reducing agent is a reactant which brings about the reduction of the other reactant and itself undergoes oxidation.\xa0 | |
| 56517. |
What is the formula of compound formed after corrosion of copper??? |
| Answer» When the surface of a metal is exposed to air, moisture or any other substance around it, the metal is said to corrode, and the phenomenon is known as corrosion.Basic Copper carbonate (mixture of copper carbonate and copper hydroxide) fprmed after corrosion of copper. | |
| 56518. |
Anyone no in govt. School science ch-8 aa rha hai?? |
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Answer» Then go to govt. school and stufy there No no |
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| 56519. |
Why pancreas is known as mixed gland? Write the names of harmones released from pancreas. |
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Answer» Pancreas is known as mixed gland because it serves as both exocrine amd endocrine .It is also known as heterocrine gland.It secrete insulin(beta cells) and glucagon(alpha cells) Insuline* Pancreas is know as mixed gland because it secrets enzymes and also hormonesInsline, glucagon, somatostatin |
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| 56520. |
What is the reason of tooth decay. Explain |
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Answer» When the ph value in our mouth is less than 5.5 then it is acidic in nature and the enamel of our teeth gets corroded hence resulting in tooth decay Certain bacteria in the mouth produces acids while breaking the food particles, reduces the pH level less than 5 in the mouth. Because of this enamel on the tooth gets damaged by the acids. If this continues it leads to tooth decay.Tooth pastes are the basic in nature. Regular usage of tooth paste reduces acid levels present in the mouth, thus decreases tooth decay. Our mouth becomes acidic if pH value is lower than 5.5 Hence tooth decay |
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| 56521. |
What do the letter p.d stand for? |
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Answer» Potential Difference ? potential difference Potential difference |
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| 56522. |
What is Matalurrgy?and what is function |
| Answer» It is the process of extracting a metal from its ores. The following operations are carried out for obtaining the metal in the pure form.\t\tCrushing of the ore\t\t\tDressing or concentration of the ore.\t\t\tReduction of metal.\t\t\tPurification or refining of the metal\t | |
| 56523. |
Define rusting with example |
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Answer» When any metal exposed to the air reacts with the moisture present in the air forming a layer of oxide on it.This is called rusting.For example iron develops a brown coating if exposed to air.This coating is rust. When a metal exposed in air with moisture is called rust this phenomenon is known as rusting |
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| 56524. |
What is the device used to maintain p.d. in a circuit |
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Answer» Cell or battery Cell |
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| 56525. |
Why does a ray of light split when passed through a prism ? |
| Answer» The light strikes on one surface of the prism undergoes refraction and passes through the glass of the prism, and when emerges out, it refracts again. This causes the dispersion of the light and splits the light into its constituent colours. The degree of bending depends on the angle at which the ray of light enters and leaves the faces of the prism. The faces of the prism are not parallel to each other. | |
| 56526. |
What are the advantages and dis advantage of DC motor and AC generator? |
| Answer» Dc mean bhai and Ac mean phadai | |
| 56527. |
What is the main constituent of lpg gas... |
| Answer» The main constituent of LPG is butane. Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane are flammable mixtures of hydrocarbon gases used as fuel in heating appliances, cooking equipment and vehicles. | |
| 56528. |
Explain the working of a domestic electric circuit |
| Answer» Domestic electric circuits are always made in parallel .Because when one appliance is damage by dumping of current then all other appliance work but in series, when one is damage than all are damage | |
| 56529. |
Give the short paragraph on heart please give me ans jaldi because kal mera exam hai |
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Answer» Heart is a muscular organ which has 4 parts . THe upper two parts are right and left auricles and downside parts are right and left ventricles . Heart work is to pump blood to all the parts of the body whereas pump the impure blood to the lungs for purification . There are also valves present between right and left auricles and ventricles Its work is to pump blood all over the body It has 4 parts It is mascular tissue |
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| 56530. |
What is thermite reaction? what it\'s uses . |
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Answer» Metals get reduced by aluminium this process is called thermite reaction. It is used to join railway tracks & cracked machine parts. It is use in railway tracks |
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| 56531. |
What is difference between nuclear fission and nuclear fussion |
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Answer» Nuclear fusion means to combine whereas nuclear fission means to break In nuclear fission one big atom is converted into smaller atoms whereas in nuclear fussion two small atoms are fused |
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| 56532. |
Explain the feedback of mechanism of harmons |
| Answer» Feedback mechanism is the mechanism of the body to maintain the levels of hormones in the body in the desired limits. An increase or decrease in the levels of the hormones triggers the feedback mechanism. The body has two types of feedback mechanisms, positive and negative feedback mechanism.Negative feedback mechanism: Whenever there is a change in the normal state, the messages are sent to ‘increase’ secretions if there is a fall below normal or to ‘decrease’ secretions if there is a rise above normal to restore the normal body state. Such a mechanism is called a negative feedback mechanism.The increase in the blood sugar level stimulates the secretion of insulin so that the sugar level is maintained. If the blood sugar level falls below normal, then it stimulates the secretion of glucagon. Glucagon stimulates the breakdown of glycogen to glucose, and thus, the normal sugar level is maintained. | |
| 56533. |
Function of thyroid gland ,pituitary ,pancreas |
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Answer» And pancreas regulates blood sugar level Thyroid gland secrete thyroxine hormone ,pitutary growth hormone |
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| 56534. |
Which gas is present in acid rain |
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Answer» Nitrous No2 Sulphur dioxide Sulphur dioxide Chlorine |
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| 56535. |
what is the aquaregia |
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Answer» A conc sulphuric acid and nitric acid in the ratio of 3:1 It is made up of hcl and hno3 (concentrated) in ratio of 3:1 It is not h2so4. It is hno3 See your Ncert it is made up of consentrated HCL and concentrrated H2So4 in the ratio 3:1 |
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| 56536. |
Why do birds fly back to their nests in the evening ? |
| Answer» Birds fly back to their nests in the evening to have rest just like u went back to ur home in the evening after playing. | |
| 56537. |
The image formed on retina is inverted but we can see the objects erect, Why? |
| Answer» Brain sense it as erect | |
| 56538. |
What is persistence of vision ? |
| Answer» Oh i get this -it is the time duration for which the image of an object remains in the eye after the removal of it. It is 1/16 for human eye. | |
| 56539. |
Why sun seen before sun rise and after sun set |
| Answer» Due to atmospheric refraction | |
| 56540. |
What is a bioligical magnification |
| Answer» The accumulation of harmful chemicals in the bidy of living organismsat different tropic levels in a food chain is called biological magnification | |
| 56541. |
What is the role of a fuse in electric circuits |
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Answer» Fuse protect the household circuit from overloading and short circuiting F u s e is a safety device it has high resistivity due to this it prevent from overloading or short circuiting |
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| 56542. |
Si unit |
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Answer» What is your write clearly ok which |
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| 56543. |
Reactivity of aluminum if it is dipped on HNO3 why? |
| Answer» (i) Reactivity of Al decreases if it is dipped in HNO3.(ii) Carbon cannot reduce the oxides of Na or Mg.(iii) NaCl is not a conductor of electricity in solid state, whereas it conducts electricity in aqueous solution as well as in molten state.(iv) Iron articles are galvanised.(v) Metals like Na, K, Ca and Mg are never found in their free state in nature. | |
| 56544. |
What is the meaning of Diarrhoea |
| Answer» a condition in which faeces are discharged from the bowels frequently and in a liquid form. | |
| 56545. |
All isomers of hexane |
| Answer» 5 | |
| 56546. |
Write two ways of harnessing energy from ocean ?? |
| Answer» The energy can be harnessed from ocean in the following ways:(i) Tidal energy Due to the gravitational pullmainly of the moon on the spinning of the earth, the level of water in the sea rises and falls,are called high and low tides that can be harnessed by constructing a dam across a narrow opening to the sea.(ii) Ocean thermal energy The water at the surface of the sea or ocean is heated by the sun while the water in deeper sections is relatively cold. This difference in temperature is exploited to obtain energy in ocean thermal energy conversion plants. | |
| 56547. |
Why solar cookers are covered with glass plate ? |
| Answer» The sun rays pass through the glass sheet cover and get absorbed inside the cooker box. It traps more and more heat rays of the sun, thus it is helpful in heating the food item. So solar cookers are covered with glass plate | |
| 56548. |
Who like physics??Physics became easy ask why?? |
| Answer» Physics easy ho jati agar Newton per apple ki bhajaya pade( ?)gir jata | |
| 56549. |
Photolytic process of H2O |
| Answer» It is the 3rd step of photosyntesis process after the conversion of light energy to chemical energy....thus after this conversion their is the hydrolosis of water and it break down into hydrogen and oxygen separately ..hope u understood for more information read the book thoroughly | |
| 56550. |
Basic concept of nutrition |
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Answer» The process which organised get food and it allows the food to get nutrients called nutrition Basicallly it is the taking of nutritious food and its utilization... |
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