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what is meant by rusting of iron with the help of diagram describe activity to find out the condition under which iron rust

Posted by Satyajeet Kamble 3 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Anshita Goyal 3 years, 4 months ago

The process in which iron reacts with oxygen in the presence of moisture to form reddish brown coating of hydrated ferric oxide [Iron (III) oxide].Fe2O3 xH2O Activity: (i) Take three boiling tubes A, B and C. (ii) Pour some water in test tube A Put iron nails in it and cork it. (iii) Pour boiled distilled water in another test tube B and put iron nails in it. Add 1 ml of ojl over it such that oil flo’ats over it and prevents the air from entering. (iv) Take some iron nails in test tube C and put some anhydrous calcium chloride in it and cork it . (v) Leave all the three test tubes for one day and then observe. Observation: Iron nails get rusted in test tube A because both air and water are present in it. Iron nails do not get rusted in B because there is water but no air. In C, rusting will not take place because there is neither air nor water. Conclusion: Iron gets rusted in the presence of air and water

ANSWER

Power of a lamp is 60w . Find the energy in joules consumed by it in 1 sec .

Posted by Manish Tripathi 3 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Srishty Kumari 3 years, 4 months ago

60 joules

ANSWER

If work done in moving a charge of 20 mC from infinity to a point O in an electric field is 15 J ,then what is the electric potential at this point

Posted by Manish Tripathi 3 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Aditi Kumari 3 years, 4 months ago

We know that work done in moving a charge Q in a potential V is given by: W = Q x V ∴ V = W Q WQ V = 15 J 20 × 10 − 3 15J20×10−3 Since, Q = 20mC = 20×10-3C V = 7.5 x 102C

ANSWER

Solvays process

Posted by Khushi Nagar 3 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Srishty Kumari 3 years, 4 months ago

NaCl +H20+NH3+ CO2 ---- NaHCo3+NH4Cl,,,, on heating NaHCo3 ----- Na2Co3+H2O+ CO2 is formed. On dissolving in water,after cooling. Na2CO3+ 10H2O----- Na2CO3.10H2O

Vaishnavi Dwivedi 3 years, 4 months ago

2NaHCO3 is heated to form NA2CO3 +H2O+CO2 NA2CO3 +10 H2O makes NA2CO3.10H2O

Vaishnavi Dwivedi 3 years, 5 months ago

Preparation of washing soda

ANSWER

Plane mirror focal length kya hoga ?

Posted by Ram Kumar Shama 3 years, 5 months ago

CBSE > Class 10 > Science

4 answers

Dcx Dcx 3 years, 4 months ago

Infinity

Rudra Upadhyay 3 years, 4 months ago

Infinity

Manish Tripathi 3 years, 4 months ago

Plane mirror ki focal length infinity hogi or magnification +1 hoga

Ram Kumar Shama 3 years, 5 months ago

Infinity

ANSWER

Bhai kisi ke pass educart 2022-23 ke educart ke kisi bhi subject ke question ki pdf h to link share krdo pls

Posted by Yash Khemka 3 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Bindu Bharathi 3 years, 4 months ago

Same

ANSWER

How is atotropic

Posted by Kunal Singh 3 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Kunal Singh 3 years, 4 months ago

Difference between acid s base

Manisha Parmar 3 years, 4 months ago

Autotrophic is that organism which prepare the food itself

Megha Tomar 3 years, 4 months ago

Organisms where prepare food on their own

ANSWER

Who is mia Khalifa

Posted by Nitish Aheria 3 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Narendra Kumar 3 years, 4 months ago

Is your mom

Tanish Dhiman 3 years, 4 months ago

Mia Khalifa is a por*st@r

ANSWER

Write any 3 difference between phototropism and geotropism

Posted by Kanishaka Rana 3 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Aditi Kumari 3 years, 4 months ago

The main difference between phototropism and geotropism is that phototropism is the growth of plants towards light whereas geotropism is the growth of plants towards gravity. Furthermore, the stem of plants shows positive phototropism while the root of the plant shows positive geotropism.

ANSWER

Object like coin under water appears to be raised

Posted by Mohini Kushwah 3 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Account Deleted 3 years, 4 months ago

Due to refraction of light

Srishty Kumari 3 years, 4 months ago

Due to refraction

Prabhroop Kaur 3 years, 5 months ago

As light ray travel from rarer to denser medium

ANSWER

Science chapter 123 all blue and exercises

Posted by Prem Shankar Dubey 3 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Bindu Bharathi 3 years, 4 months ago

No

Prem Shankar Dubey 3 years, 5 months ago

Yes

ANSWER

Explain respiration?

Posted by Akchhat Raghav 3 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Manisha Parmar 3 years, 4 months ago

Respiration will break down the energy from food and it also involved breathing also

Deepika Rathi 3 years, 5 months ago

The process of realising energy from food

ANSWER

Potential difference is 20v current is 5a then what is the value of resistance

Posted by Surya Duduka 3 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Neha Gupta 3 years, 4 months ago

V=20 ,I =5 R=V/I =20V/5I =4 ohm.

Harshvivek Lakhera 3 years, 4 months ago

4 ohm

Manish Tripathi 3 years, 4 months ago

4ohm

Vipin Rajput 3 years, 5 months ago

4 𝒐𝒉𝒎

Deshwar Singh 3 years, 5 months ago

4ohm

ANSWER

Plaster of Paris and gypsum formula→

Posted by 𝕷𝖊𝖌𝖊𝖓𝖉 🏆 🍑 🎀 𝒜𝓁☯𝓃𝑒 𝑅𝒶𝓈𝒽𝒾 🎀 🍑 3 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Tanishka Singh 3 years, 5 months ago

Caso4.1/2 H20

Prabhroop Kaur 3 years, 5 months ago

CaSo4.½H2O CaSo4 .2H2O

Shashank Bajaj 3 years, 5 months ago

CaSo4.1/2H20 - plaster of paris

Ainne Merzia 3 years, 5 months ago

What is chlorophyll

Ainne Merzia 3 years, 5 months ago

Hello

ANSWER

Neurons also called

Posted by Faizan Wafa 3 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Manish Tripathi 3 years, 4 months ago

Nerve cell

Tanishka Singh 3 years, 5 months ago

Nerve cells

Atharva Mishra 3 years, 5 months ago

Nerve cells

ANSWER

What is Mendel's experiment?

Posted by Neha Gupta 3 years, 5 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Define neuron and it's function

Posted by Sudhanshu Pandit 3 years, 5 months ago

CBSE > Class 10 > Science

4 answers

Parinita Masete 3 years, 4 months ago

Neuron is the longest cell in our body which passes electrical impulse from receptors to brain or spinal cord

Prabhroop Kaur 3 years, 5 months ago

Neuron help our body to respond to the stimulus by sending impulse to brain .

Raj Vikram Singh 3 years, 5 months ago

And it's main work is to control all functions of the body like maintaining the gesture and pasture of the body and many more.........

Neha Gupta 3 years, 5 months ago

Neuron is basic fundamental unit of brain or nerve system.

ANSWER

How smell identify by our nose?

Posted by Sukomal Kumar 3 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Harshita Singh 3 years, 4 months ago

By olfactory receptors

Akshay Kumar 3 years, 5 months ago

By olfactory receptors

Priya Biradar 3 years, 5 months ago

By olfactory receptors

ANSWER

What is neutralization ?

Posted by Anshul Agrawal 3 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Harshvivek Lakhera 3 years, 5 months ago

When an acid react with base to give salt water is called neautralization.

Akshay Kumar 3 years, 5 months ago

The reaction in which an acid reacts with a base to give salt and water is called neutralization reaction

Neha Gupta 3 years, 5 months ago

When all acids react with base to form salt and water is called neutralization reaction..

Chinki 🦋👈🏻 3 years, 5 months ago

A reaction of an acid with a base to form salt and water is a neutralization reaction......

Priya Biradar 3 years, 5 months ago

The reaction between strong acid and strong base to produce salt and water is known as neutralization

ANSWER

Aashismehraandkrishnamehra

Posted by Prachi Mehra 3 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Prabhroop Kaur 3 years, 5 months ago

Aashismehraandkrishnamehra

ANSWER

Krishnamehra

Posted by Prachi Mehra 3 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Prabhroop Kaur 3 years, 4 months ago

Krishnamehra

Abdur Raheem 3 years, 5 months ago

What is Kyoto protocol

ANSWER

What is acid.

Posted by John Jamatia 3 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Priya Biradar 3 years, 5 months ago

A compound that releases H+ in aquious solution

Anshul Agrawal 3 years, 5 months ago

Acid is a sour substance that change blue litmus to red. Ex- H2SO4

Ayush Raj 3 years, 5 months ago

Acid is a sour substance that change blue litmus to red. Ex- H2SO4

Nargish Sekh 3 years, 5 months ago

Acids are those chemical subastances which have as sour taste. Acids change the colour of blue litmus to red

Aditi Thakur 3 years, 5 months ago

Acids are those substances which release hydrogen ions when dissolve in water

ANSWER

How to do ***?

Posted by Rohan Dey 3 years, 5 months ago

CBSE > Class 10 > Science

4 answers

Vishnu Priyan 3 years, 4 months ago

First remove dress both male and female and male need to insert penins into the ******, after s.p.e.r.m enters through vaginal passage

Parth Srivastava 3 years, 5 months ago

Ye Jhonny Sins se pucho He know very well

Rahul Chakrawarti 3 years, 5 months ago

What is***

Rohan Dey 3 years, 5 months ago

What is ***

ANSWER

Distinguish between concave mirror and convex mirror without touching them

Posted by Vijaya Laxmi 3 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Nargish Sekh 3 years, 5 months ago

By taking a pencil near them if the mirror is curved inwards it will be concave mirror or if the mirror is curved outwards then it will be convex mirror

Ashu Yadav 3 years, 5 months ago

We can distinguish between them by seeing from it if it will show diminished image it will be convex

ANSWER

What is the importance of D.N.A copying

Posted by Anushka Saroha 3 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Vishnu Priyan 3 years, 4 months ago

To produce new generations

ANSWER

Which substance is made of reaction between NaoH +H2o_______?

Posted by Sachin Kumar 3 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Arshlan Pathan 3 years, 5 months ago

It gives Na(OH)²+H2O

Nargish Sekh 3 years, 5 months ago

Nao+H2O

Mahima Siingh 3 years, 5 months ago

Nao + H20

ANSWER

Cbse board paper 2017

Posted by Nidhi Kapoor 3 years, 5 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is inherently

Posted by AϻคᏁ . 3 years, 5 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Type of hormone

Posted by Ayush Kumar Kumar 3 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Nargish Sekh 3 years, 5 months ago

Plants hormone and animal hormones Plants hormones:- 4 types of hormones are there. 1. Auxins 2. Gibbrelins 3. Cytokinins 4. Abscisic acid Animals hormones:- 8-9 hormones 1. Releasing hormone 2. Growth hormone 3. Throxine 4. Parathormone 5. Insulin 6. Adrenaline 7. Thymosin 8. Testosterone 9. Progesterone & Oestrogen 9. Melatonin

ANSWER

Which is the control centre of a reflex action ? What is the route taken by reflex action called

Posted by Vaibhav Dhingra 3 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Prabhroop Kaur 3 years, 5 months ago

Reflex arc

Prabhroop Kaur 3 years, 5 months ago

Spinal cord , aeflex arc

ANSWER

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