CBSE > Class 10 > Science | CBSE Board | Homework Help

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.ok

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What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur?

Posted by Pihu ✨ 4 years, 9 months ago

CBSE > Class 10 > Science

4 answers

Himanshu Pandey 4 years, 9 months ago

chat on Whtp

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Himanshu Pandey 4 years, 9 months ago

nhi smj pa rhi ho kya

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Himanshu Pandey 4 years, 9 months ago

Plz

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Himanshu Pandey 4 years, 9 months ago

Face revel

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What would be the electron dot structure of carbon dioxide which has the formula CO2?

Posted by Pihu ✨ 4 years, 9 months ago

CBSE > Class 10 > Science

3 answers

Himanshu Pandey 4 years, 9 months ago

Aise hi

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Himanshu Pandey 4 years, 9 months ago

Face dekhna hai

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Shanu Keshri 4 years, 9 months ago

Just write C ( for carbon) and make four crosses around it showing its valence electrons and remember to draw the crosses at each side not only one. Then write two O ( for oxygen ) and draw six dots around each of them. Copy the same diagram below ( or on the side ) and circle the electron pairs which are shared ( two two pair with both oxyzen).

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Colour of lungs

Posted by Akanksha Kumari 4 years, 9 months ago

CBSE > Class 10 > Science

4 answers

Adithya Dev A 4 years, 9 months ago

Red to peach in colour.

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Akhya Sahay 4 years, 9 months ago

Colour...?maybe red

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Soni ? 4 years, 9 months ago

Heart – Your heart is between the two lungs at the front of your chest. The heart muscles continually circulate blood around your body. You know your heart is working because you can feel your heart beat and you can feel the blood at your pulse. The heart pumps blood containing new oxygen to every part of your body. At the same time, it pumps the old blood without oxygen back through the lungs where is picks up new oxygen to repeat this cycle. Lungs – your lungs are sponge-like organs. Every time you breathe they filter oxygen from the air through tiny vessels into the blood. It is then carried to the heart to be pumped round your body. The lungs filter carbon dioxide from your body when you breathe out. Kidneys – the kidneys are also filters. Some drugs are filtered more by the kidneys than by the liver. Waste products filtered by the kidneys leave the body as urine. The kidneys- are in your lower back. Any blockage to your kidneys is extremely painful and can cause permanent damage. Although you are born with two kidneys, many people live very well with just one.

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Akanksha Kumari 4 years, 9 months ago

Give detail about heart and lungs and kidney also

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Give the third homologous series of alkyne

Posted by Siddharth - 4 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Avanesh Kumar 4 years, 9 months ago

Butyne

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Krishna(~_~) ??? 4 years, 9 months ago

Butyne

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Akhya Sahay 4 years, 9 months ago

Butyne

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Siddharth - 4 years, 9 months ago

Butyne

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Siddharth - 4 years, 9 months ago

Buyyne

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Mention the number of chromosome pair present in zygote determining the *** of the male child

Posted by A K47 4 years, 9 months ago

CBSE > Class 10 > Science

3 answers

Malaika Sharma 4 years, 9 months ago

?23 pairs of chromosomes ?Total 46 chromosomes.

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Rudraksh Rai Udaiwal 4 years, 9 months ago

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Raj Rohit Singh 4 years, 9 months ago

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Full detail information about autonomic nervous system clearly

Posted by Akash K 4 years, 9 months ago

CBSE > Class 10 > Science

0 answers

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Give two reason for the appearance of variation among the off springs formed by sexual reproduction?

Posted by Himanshu Pandey 4 years, 9 months ago

CBSE > Class 10 > Science

4 answers

Himanshu Pandey 4 years, 9 months ago

One time look your icon

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Himanshu Pandey 4 years, 9 months ago

Thanks kuhu

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Saroj Kumar 4 years, 9 months ago

The two reason for the appearance of variation among the offsprings formed by sexual reproduction are as below:- 1) sepration of chromosomes 2) mutuation

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Pihu ✨ 4 years, 9 months ago

The two main reason for the appearance of variation among the progeny formed from sexual reproduction are: Crossing over in which the DNA get exchanged between the homologous chromosome during the meiosis that cause variation in the offspring.

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While diluting an acid, why is it recommend that the acid should be added to water and not water to the acid?

Posted by Pihu ✨ 4 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Himanshu Pandey 4 years, 9 months ago

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Saroj Kumar 4 years, 9 months ago

Because this process is highly exothermic .If water is added to the acid the heat generated may cause the mixture to splash out and cause heat burns and the glass container may also break due to local excessive heating

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What is cyclic saturated carbon compound?

Posted by Ujjawal Raj 4 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Saroj Kumar 4 years, 9 months ago

Those saturated carbon compund which is form in the closed cyclic is called saturated carbon compound.

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In the refinning of silver, the recovery of silver nitrate solution involved displacement by copper metal. Write down the reaction involved.

Posted by Pihu ✨ 4 years, 9 months ago

CBSE > Class 10 > Science

3 answers

Himanshu Pandey 4 years, 9 months ago

good ques.

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Himanshu Pandey 4 years, 9 months ago

Answer clear nhi hai book se dekh lo

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Himanshu Pandey 4 years, 9 months ago

When copper is mixed in silver nitrate solution it displace the silver become copper is more reactive than silver. 2AgNO3+Cu➡️Cu(NO3)2+2Ag

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Oil and fat containing food items are flushed with nitrogen, why?

Posted by Pihu ✨ 4 years, 9 months ago

CBSE > Class 10 > Science

4 answers

Utsav Akbari 4 years, 9 months ago

Because nitrogen does not react with oxygen

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Saroj Kumar 4 years, 9 months ago

Due to prevent oxidation .

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Ujjawal Raj 4 years, 9 months ago

Because nitrogen is non reactive element,thus it protects food items to react with oxygen and get spoil.

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Himanshu Pandey 4 years, 9 months ago

Oil and fat containing food items flushed with nitrogen because nitrogen act as antioxidant and it prevent them from being oxidised.

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How do Mandela's experiment show that trait are inherited independently?

Posted by Pihu ✨ 4 years, 9 months ago

CBSE > Class 10 > Science

3 answers

Himanshu Pandey 4 years, 9 months ago

Ye heart hta do nhi cbse ban kr degi

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Himanshu Pandey 4 years, 9 months ago

Mendels hoga

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Himanshu Pandey 4 years, 9 months ago

Question clear kro

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What are the causes of variations

Posted by Tavleen Kaur 4 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Chirag Gupta 4 years, 9 months ago

As we know that variation occurs in sexual reproduction where to get a means of different parents of same species are fused together to form zygote that's why the features of that they got are of both male and female parent does it create variation in that zygote

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What is the function of blood platelets?

Posted by Harshal Joshi 4 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Suraj Gupta 4 years, 9 months ago

Helps in clotting

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Aman Pandey 4 years, 9 months ago

To prevent more bleeding in cut the skin.

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Saroj Kumar 4 years, 9 months ago

It clotes the blood It stop bleeding

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Chehak Kohli 4 years, 9 months ago

Platelets form clots and stop or prevent bleeding.

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Chehak Kohli 4 years, 9 months ago

Platelets form clots and prevent bleeding.

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What is the other term given to lymph?

Posted by Harshal Joshi 4 years, 9 months ago

CBSE > Class 10 > Science

4 answers

Harshal Joshi 4 years, 9 months ago

Thanks Ankit kumar??

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Nidhi Kumari 4 years, 9 months ago

Colour less fluid

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Chehak Kohli 4 years, 9 months ago

There is no other term given to lymph.

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Chehak Kohli 4 years, 9 months ago

No other term is given to lymph.

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What are sieve tubes?

Posted by Harshal Joshi 4 years, 7 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 7 months ago

Sieve elements are specialized cells that are important for the function of phloem, which is a highly organized tissue that transports organic compounds made during photosynthesis. Sieve elements are the major conducting cells in phloem.

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What are the advantages of sexual reproduction over asexual reproduction ?

Posted by Tapas Ranjan Lenka 4 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Pragati Verma 4 years, 9 months ago

Sexual reproduction gives variations in the offsprings from which they have a better chance of adaptation and survival whereas in asexual reproduction the offsprings are the exact same copies of the parents so there is less chance of survival and adaptation. Infact the rate of variations in asexual reproduction is very very low.

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why is tungsten used almost exclusively for filament of electric lamps?

Posted by Himanshu Mishra 4 years, 9 months ago

CBSE > Class 10 > Science

3 answers

Chirag Gupta 4 years, 9 months ago

As a tungsten have very high melting point and the high resistivity that's why it does not burn easily at the high temperature or we can say that it do not melt easily

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Himanshu Mishra 4 years, 9 months ago

ThankU

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Khushi 4 years, 9 months ago

tungsten has very high melting point and very high resistivity so does not burn easily at a high temperature .

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Why do we store silver chloride dark coloured bottles?

Posted by Himanshu Mishra 4 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Harshal Joshi 4 years, 9 months ago

We store silver chloride in dark coloured bottles to prevent its decomposition in sunlight.

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Khushi 4 years, 9 months ago

Silver chloride decomposes into silver and chlorine gas when exposed to sunlight. Hence Silver chloride is stored in dark coloured bottles.

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1).What is precipitation reaction? Explain with one example? Give one reaction of it? 2).Give any two difference between displacement reaction and double displacement reaction?

Posted by Harshal Joshi 4 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Harshal Joshi 4 years, 9 months ago

Thx.....

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Atul Prabhakar 4 years, 9 months ago

The reaction in which precipitate is found which is insoluble in water is called precipitation reaction

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What is aperture? Define it?

Posted by Harshal Joshi 4 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Rudraksh Rai Udaiwal 4 years, 9 months ago

The diameter of the reflecting surface of spherical mirror is called it's aperture.

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Khushi 4 years, 9 months ago

The diameter of the reflecting surface of spherical mirror is called it's aperture.

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What is pulmonary circulation?

Posted by Ishita Yadav 4 years, 9 months ago

CBSE > Class 10 > Science

3 answers

Chehak Kohli 4 years, 9 months ago

The pulmonary circulation is the portion of the circulatory system which carries deoxygenated blood away from the right ventricle, to the lungs, and returns oxygenated blood to the left atrium and ventricle of the heart.

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Puja Sahoo 4 years, 9 months ago

Circulation done by pulmonary artery and vein called pulmonary circulation The pulmonary artery carries deoxygenated blood from heart to lungs and pulmonary vein carries oxygenated blood from lungs to heart

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Pranjal Sharma 4 years, 9 months ago

Circulation done by pulmonary artery or vein called pulmonary circulation

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Veins are thin walled and have valves. Justify

Posted by Pihu ✨ 4 years, 9 months ago

CBSE > Class 10 > Science

4 answers

Sanjeev Saha 4 years, 9 months ago

Veins are thin walledbecause the veins collect blood from different body organs to the heart and they have valves to ensure that blood flows only in one direction

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Chehak Kohli 4 years, 9 months ago

Veins collect the blood from different organs and bring it back to the heart. The blood is no longer under pressure so, the walls are thin with valves to ensure that blood flows only in one direction.

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Ranvijay Kumar 4 years, 9 months ago

Veins are thin-walled and have valves that prevent the blood from flowing back in the wrong direction.Veins carry blood heading towards the heart.Blood comming from the tissue has delivered O2 and picked up CO2 from the cell.

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Himanshu Mishra 4 years, 9 months ago

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What is earth wire ..? How it works in our domestic circuit

Posted by Sanjana Kumari 4 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Chehak Kohli 4 years, 9 months ago

The earth wire gives a safe route for the current if the live wire touches the outer casing. Livewire is A wire carrying electric current. The metallic body is connected to the earth wire, which provides a low resistance-conducting path for the current. It ensures that any leakage of current of the metallic body the appliance will flow to the earth only and the user may not get a severe shock.

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Varun Soni 4 years, 9 months ago

we connect the earth wire to metal casing of electrical appliances by using three pin plug. If by chance, live wiretouches any metal case parts of appliances then current passes directly to earth. hence earthing is used as safety measure to prevent shock from metal objects.

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Calcium carbonate

Posted by Abhishek Negi 4 years, 9 months ago

CBSE > Class 10 > Science