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Lavi Lavi 3 years, 9 months ago

Endothermic reaction

Komathi .R 3 years, 9 months ago

Plaster of Paris is created when gypsum is heated to 150°c. At this temperature, the mineral partially dehydrates, with 75% of water content escaping as water vapor. This is an Endothermic reaction

Anjali Taehyung 3 years, 9 months ago

Endothermic reaction...

Burhan Uddin 3 years, 9 months ago

Endothermic breaction

4Thank You

ANSWER

A reaction which is opposite to combination reaction?

Posted by Soumya Sahu 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Malladi Sriram 3 years, 9 months ago

Decomposition

Prince Sharma 3 years, 9 months ago

Decomposition is right answer Combination ={ a+b-- ab} Decomposition ={ ab--a+b}

Nazeera E V 3 years, 9 months ago

Decomposition reaction

Riya Bhati 3 years, 9 months ago

Decomposition reaction

Dhivyadharsan . K 3 years, 9 months ago

Who knows

ANSWER

What does humman body need term part system for

Posted by Sanjana Raunak 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 3 years, 9 months ago

Our bodies consist of a number of biological systems that carry out specific functions necessary for everyday living. The job of the circulatory system is to move blood, nutrients, oxygen, carbon dioxide, and hormones, around the body. It consists of the heart, blood, blood vessels,arteries and veins.

ANSWER

Calculate the monthly bill for a heater of resistance 20ohm which is used on 240v mains such that it's daily use is for 2 hours. The cost of electrici energy is ₹4.30 perkilo watt

Posted by Bharath Hg Bharathhg 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 3 years, 9 months ago

Resistance of heater = 20Ω
V = 240v
Time for which is the heater used daily = 2 hrs
Cost = Rs. 4.30 per kWh

Total Work done by the heater every day =

Total work done by the heater in a Month of 30 days = 5760*30/1000
=>172.8kWh

Total Cost = 172.8 * 4.30 = Rs. 743.04

ANSWER

The power of a plane lens is A) negative B) infinity C) zero D) positive

Posted by Mansi Shehrawat 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Aadarsh Shrivastav 3 years, 9 months ago

Hannah Roselin J 3 years, 9 months ago

Riya Bhati 3 years, 9 months ago

Mahira Srivastava 3 years, 9 months ago

C ) zero

Vijayalaxmi Sahu 3 years, 9 months ago

D-positive

ANSWER

A balanced chemical equation is in accordance with

Posted by Shagufta Hayatkhan 3 years, 9 months ago

CBSE > Class 10 > Science

3 answers

Haya Sikander 3 years, 9 months ago

Law of conservation of mass

Somansh Sarvesh 3 years, 9 months ago

Law of conservation of Mass

Mahira Srivastava 3 years, 9 months ago

To satisfy law of conservation of mass

ANSWER

Kidney fuction?

Posted by Krish Solanki 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Riya Bhati 3 years, 9 months ago

Remove the waste product from body

Mahira Srivastava 3 years, 9 months ago

Main excretory organ of body

Priya . 3 years, 9 months ago

Excrete the waste in our body

Atul Kumar 3 years, 9 months ago

kidneys also remove acid that is produced by the cells of our body and maintain a healthy balance of water, salts, and minerals—such as sodium, calcium, phosphorus, and potassium—in our blood.

Atul Kumar 3 years, 9 months ago

Helps in excretion of wastes from our body

ANSWER

Please help my paper schoo

Posted by Kashifa Siddiqui 3 years, 9 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Power (in diopter) and focal length( in metre ) are related as

Posted by Gagan Dhull 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Komathi .R 3 years, 9 months ago

Power =1/focal length

Anagha Pratinidhi 3 years, 9 months ago

P=1/f

Priya . 3 years, 9 months ago

Power=1/focal length

Amit Kumar Bhartiya 3 years, 9 months ago

Power of lens

Heer Mehta 3 years, 9 months ago

P(in dioptre)=1/focal length(in m)

ANSWER

A doctor has prescribed a corrective lens of power 1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging.

Posted by Freddy Mon 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Arjit Katiyar 3 years, 9 months ago

Given P = +1.5 D Find out We need to find out the focal length of the given lens Solution We know that f = 1/P Where, f is the focal length P is power f = 1/P = 1/+1.5 = 0.67 m. As the power of the lens is (+ve), the lens is converging

5Thank You

ANSWER

Find the focal length of a lens of power -6.0 D. What type of lens is this?

Posted by Freddy Mon 3 years, 9 months ago

CBSE > Class 10 > Science

4 answers

Priyanshi Attrish 3 years, 9 months ago

Concave lens

Anjali Taehyung 3 years, 9 months ago

Concave lens because the power of lens in negative...

Riyaz Shaikh 3 years, 9 months ago

Cancave lens

Ramanjot Kaur Saini 3 years, 9 months ago

1.6D and convex lens

ANSWER

An object 4 cm in length is placed at a distance of 20cm infront of a convex mirror of radius of curvature 30cm.Find the position of the image, size and nature.

Posted by Freddy Mon 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Anjali Taehyung 3 years, 9 months ago

Position of image is sixty cm and height of image is -12 cm , real and inverted

ANSWER

A convex lens forms a real and inverted image of a needle at a distance of 20 cm from it. Where is the needle placed infront of the convex lens if the image is equal to the size of the object ? Also find the power of the lens.

Posted by Freddy Mon 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Dhairya Sharma? 3 years, 9 months ago

The needle should be placed at 2F1 to form an image of the same size.... The power of lens is +1D

ANSWER

A convex mirror forms a virtual and erect image of a needle at a distance of 10 cm from it. Where should we place the object to get the image at 10 cm.Its radius of curvature is 10 cm

Posted by Freddy Mon 3 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Dhairya Sharma? 3 years, 9 months ago

Sorry at Centre of Curvature

Dhairya Sharma? 3 years, 9 months ago

The needle should be placed at Focus

ANSWER

Which is the first enzymes to get mixed with food

Posted by Raunak Kumar 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Ramanjot Kaur Saini 3 years, 9 months ago

Salivary gland

Khushabu Kumari 3 years, 9 months ago

Salivary amylase

Jigyasha Rao 3 years, 9 months ago

Amylase

Karandeep Singh 3 years, 9 months ago

Salivary amylase

Raunak Kumar 3 years, 9 months ago

S amylase

ANSWER

Where did light energy change into chemical energy? Which part of plant

Posted by Akshara Kumari 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Priya . 3 years, 9 months ago

Chloroplast

Ramanjot Kaur Saini 3 years, 9 months ago

Chloroplast

Khushabu Kumari 3 years, 9 months ago

Chloroplast

Karandeep Singh 3 years, 9 months ago

Chloroplast

Prabhjot Kaur 3 years, 9 months ago

Grana or chloroplast deeply mesophyll layer

ANSWER

Why is diffusion insufficient to meet the oxygen requirements of multi cellular organisms like humans?

Posted by Shraddha Suresh 3 years, 9 months ago

CBSE > Class 10 > Science

4 answers

Riya Bhati 3 years, 9 months ago

Because of complex structure

Anagha Pratinidhi 3 years, 9 months ago

Because diffusion is a very slow process and multi cellular beings are very complicated in their structure, hence it would take a very long time for the diffused oxygen to reach all the parts of the body.

Ramanjot Kaur Saini 3 years, 9 months ago

Because it is very slow process and oxygen is insoluble substance let's take some example if diffusion starts from a head of the human it takes three years to complete a because it is very slow process

Prabhjot Kaur 3 years, 9 months ago

Bcz it's a slow process and oxygen is insoluble

ANSWER

What is ph value of litmus paper

Posted by Vishal Jha 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Dhairya Sharma? 3 years, 9 months ago

Ramanjot Kaur Saini 3 years, 9 months ago

Gunjan Chauhan 3 years, 9 months ago

Aaditya Patil 3 years, 9 months ago

Aditi Kumari 3 years, 9 months ago

ANSWER

Which of these is amphoteric (a)Mg (b)Al2O3 (c)K2O

Posted by Priya . 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Jhalak Varshney 3 years, 9 months ago

B Al2O3

Abhi Shek 3 years, 9 months ago

Aluminium Oxide

Aaditya Patil 3 years, 9 months ago

Al2O3

Aditi Kumari 3 years, 9 months ago

Al2o3

Vishal Jha 3 years, 9 months ago

Al203 is right one

ANSWER

Which one of the following is incorrect for metal ? 1.in their pure state metal have a shining surface 2.the ability of metal to be drawn into thin wires is called malleability 3.Metals are generally soft 4.some metals can be beaten into sheets. A. 1&2 B. 2&3 C. 3&4 D.1&4

Posted by Divya Patil 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Dhana Lakshmi S 3 years, 9 months ago

2&3 are incorrect

Dhana Lakshmi S 3 years, 9 months ago

2&3 are incorrect

Ved Prakash Singh 3 years, 9 months ago

B. 2&3

Md Aftab Alam 3 years, 9 months ago

Option B - 2 and 3

Abhi Shek 3 years, 9 months ago

THE ANSWER IS OPTION D) 1&4. Metals have a shining surface in nature.So it is correct. The ability of a metal to be drawn into thin wires is called ductility. Metals are generally hard except sodium , potassium and lithium.But also we consider them hard because it is the natural property of it and a majority of them are hard.So option 4 is also correct

ANSWER

Respirashen

Posted by Mukul Dabas 3 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Priyanshi Attrish 3 years, 9 months ago

Respiration is a process of taking oxygen gas from outside and utilities it in our body to make energy that can used by our body.

Aaditya Patil 3 years, 9 months ago

Spelling Is incorrect. It's respiration

ANSWER

Why Vanilla is sweet smell ?

Posted by Saumya Pandey 3 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Gunjan Chauhan 3 years, 9 months ago

Because of all factory indicators

Shailendra Rai 3 years, 9 months ago

Because it is ol-factory indicator.

ANSWER

Mind map on light reflection and refraction and life process

Posted by Samiksha Singh 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Anagha Pratinidhi 3 years, 9 months ago

Hey...if you need mind maps Oswal reference books is a good source

ANSWER

How to find the molar mass

Posted by Swayampurna Panigrahi 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 3 years, 9 months ago

The characteristic molar mass of an element is simply the atomic mass in g/mol. However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol). To calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms.

ANSWER

Light is a phenomenon which makes things. 1.happen 2.visible 3.bounce off 4.hit the surface

Posted by Sintu Pal 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Samiksha Singh 3 years, 9 months ago

Visible

Gaurav Gill 3 years, 9 months ago

Visible

Anitha Baskaran 3 years, 9 months ago

visible

Shivam Raj 3 years, 9 months ago

Uisible

Zaveriya ?? 3 years, 9 months ago

Visible

ANSWER

Reflection on 50 question

Posted by Sulekha Kumari 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Anagha Pratinidhi 3 years, 9 months ago

Can you please elaborate?

ANSWER

How to identify metal and non-metal

Posted by Priya . 3 years, 9 months ago

CBSE > Class 10 > Science

5 answers

Zaveriya ?? 3 years, 9 months ago

From their physical and chemical proprety

Rakshit Singh 3 years, 9 months ago

From their physical properties

Sucheta Kumari 3 years, 9 months ago

Metals always have 1,2,3 electrons in outermost/valence shells whereas non-metals have 4,5,6,7 electrons in their outermost shell

Priya . 3 years, 9 months ago

Eg for non metal

꧁▪ ＲคᎥនТαʀ ࿐ 〖Sէudץ〗 3 years, 9 months ago

From ductility , sonorous,malleablity , lustrous, good conductor and good of heat and electricity

4Thank You

ANSWER

Write short note on common salt and bleaching powder

Posted by Ankit Singh 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Priya . 3 years, 9 months ago

Bleaching powder is a pale yellowish powder existing with a strong smell of chlorine. It is soluble in water but due to the presence of impurities, we never observe a clear solution.its chemical name as Calcium hypochlorite. Common salt is formed by the reaction between hydrochloric acid and sodium hydroxide. It exists as an important raw material for the production of various chemical compounds such as caustic soda (sodium hydroxide), bleaching powder Ca(OCl2)etc.,

ANSWER

Please send me in short define human digestive system

Posted by Neeraj Harsana 3 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Priya . 3 years, 9 months ago

human digestive system, system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract, or the series of structures and organs through which food and liquids pass during their processing into forms absorbable into the bloodstream.