Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Sanket Sundar 5 years, 8 months ago
- 4 answers
Dhruv.... . 5 years, 8 months ago
Posted by Premchand Hembrom 5 years, 8 months ago
- 1 answers
Meghna Thapar 5 years, 8 months ago
The various characteristics of chemical reactions are:
- Evolution of a gas: The chemical reaction between zinc and dilute sulphuric acid is characterized by the evolution of hydrogen gas.
- Formation of a precipitate: The chemical reaction between potassium iodide and lead nitrate is characterised by the formation of a yellow precipitate of lead iodide.
- Change in colour: The chemical reaction between citric acid and purple coloured potassium permanganate solution is characterised by change in colour (from purple to colourless).
- Change in temperature: The reaction between quick lime and water to form slaked lime is characterised by a change in temperature.
- Change in state: When wax is burned, then water and carbon dioxide are formed. Wax is a solid; water is a liquid whereas carbon dioxide is a gas.
Posted by Naresh Garg 5 years, 8 months ago
- 1 answers
Meghna Thapar 5 years, 8 months ago
The various characteristics of chemical reactions are:
- Evolution of a gas: The chemical reaction between zinc and dilute sulphuric acid is characterized by the evolution of hydrogen gas.
- Formation of a precipitate: The chemical reaction between potassium iodide and lead nitrate is characterised by the formation of a yellow precipitate of lead iodide.
- Change in colour: The chemical reaction between citric acid and purple coloured potassium permanganate solution is characterised by change in colour (from purple to colourless).
- Change in temperature: The reaction between quick lime and water to form slaked lime is characterised by a change in temperature.
- Change in state: When wax is burned, then water and carbon dioxide are formed. Wax is a solid; water is a liquid whereas carbon dioxide is a gas.
Posted by Surat Dhani 5 years, 8 months ago
- 3 answers
Posted by Dhruv.... . 5 years, 8 months ago
- 5 answers
Posted by Kiranpreet Kaur Kaur 5 years, 8 months ago
- 2 answers
Posted by Lucifer?? Morningstar?? 5 years, 8 months ago
- 1 answers
Yogita Ingle 5 years, 8 months ago
Nastic movements
→ Nastic movements are non directional responses to stimuli such as temperature and heat.
→ The most important feature of this type of movement is that movements are not governed by the direction of the stimulus.
→ They may be induced by touch (seismonastic), temperature (Thermonastic), light, and chemicals.
→ Whatever be the direction of stimulus, the movements always occur in a particular direction without reference to the direction of the stimulus
→ Example of seismonastic movement is movement of Venus fly trap.
Tropic movement
→ Tropic movement is the response to stimuli that comes from one direction.
→ It is a directional movement.
→ If the movement of the plant part is towards the stimulus, then it is known as positive tropism . If the movement of the plant part is away from the stimulus, then it is known as negative tropism .
→ For example phototropism, Geotropism etc.
Tropisms and nastic movements are both plant responses to external stimuli. however tropisms are depend on the direction of the stimulus nastic movements do not depend on the direction of a stimulus
Posted by Lucifer?? Morningstar?? 5 years, 8 months ago
- 2 answers
Yogita Ingle 5 years, 8 months ago
Vena cava is either of the two large veins that drain blood from the upper body and from the lower body and pour it into the right atrium of the heart.
The superior vena cava is the large vein which returns blood to the heart from the upper parts of the body such as head, neck and both upper limbs. The inferior vena cava returns blood to the heart from the lower part of the body.
Akhil? . 5 years, 8 months ago
Posted by Diksha? 5 years, 8 months ago
- 1 answers
Posted by Vinod Kumar Gupta 5 years, 8 months ago
- 3 answers
Yogita Ingle 5 years, 8 months ago
Copper metal is more reactive than silver metal thus, when copper spoon is kept immersed in silver nitrate solution for some time, it displaces silver from silver nitrate solution.
Reaction involved
Cu + 2AgNO3 ---> Cu(NO3)2 + 2Ag
The grey solid crystal of Ag metal are seen growing on the copper spoon and solution turns blue in colour.
Diksha? 5 years, 8 months ago
Posted by Vinod Kumar Gupta 5 years, 8 months ago
- 3 answers
Yogita Ingle 5 years, 8 months ago
Platinum and gold are some of the elements that are found on the bottom of the reactivity series. This means that the two elements do not easily react with other elements. These metals are part of the group of the noble metals that have the character of least reactivity among the metals.This decrease in reactivity is due to the high ionization energies.
This is therefore why gold and platinum do not corrode in moist air as they would not react with the water or air.
Posted by Diksha? 5 years, 8 months ago
- 7 answers
Posted by Anirban Kumar 5 years, 8 months ago
- 1 answers
Diksha? 5 years, 8 months ago
Posted by Zaki Mahdi 5 years, 8 months ago
- 9 answers
Shreya _S❤ 5 years, 8 months ago
Diksha? 5 years, 8 months ago
Posted by Pramila Devi 5 years, 8 months ago
- 1 answers
Posted by Pramila Devi 5 years, 8 months ago
- 1 answers
Posted by Pramila Devi 5 years, 8 months ago
- 1 answers
Posted by Pramila Devi 5 years, 8 months ago
- 1 answers
Yogita Ingle 5 years, 8 months ago
GIVEN:
Power=750w
V=220volts
P=Vx I
I=P/V
=750/220
=3.40A
By ohm's law, we have V=IR
R=V/I
=220/3.40
=64.7 OHMS.
THEREFORE, The current passing through circuit is 3.40A and Resistance =64.7 OHMS.
Posted by Priyanka Bhamar 5 years, 8 months ago
- 2 answers
? Royal Thakur ? 5 years, 8 months ago
Posted by Pulkit Saini 5 years, 8 months ago
- 1 answers
Posted by A&S Lv 5 years, 8 months ago
- 3 answers
Posted by Dhruv .. 5 years, 8 months ago
- 1 answers
Posted by Sanket Sundar 5 years, 8 months ago
- 5 answers
Posted by Dhruv .. 5 years, 8 months ago
- 8 answers
Dhruv .. 5 years, 8 months ago
Posted by $N€H!L J@@T ? 5 years, 8 months ago
- 10 answers
Dhruv .. 5 years, 8 months ago
? Royal Thakur ? 5 years, 8 months ago
Posted by Dhruv .. 5 years, 8 months ago
- 7 answers
? Royal Thakur ? 5 years, 8 months ago
Posted by Lucifer?? Morningstar?? 5 years, 8 months ago
- 2 answers
Posted by Priyanka Sharma 5 years, 8 months ago
- 2 answers
Yogita Ingle 5 years, 8 months ago
Ratio of size of image to size of object
m=-v/u
'm' is negative when image is real and inverted
It is positive when image is virtual and erect
Posted by Dr. Arizoo 5 years, 8 months ago
- 3 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Sanket Sundar 5 years, 8 months ago
1Thank You