Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Anjali Tiwari 6 years, 11 months ago
- 4 answers
Posted by Amit Kumar Singh 6 years, 11 months ago
- 1 answers
Posted by Someshwar Ramteke 6 years, 11 months ago
- 1 answers
Yogita Ingle 6 years, 11 months ago
Conductor: Material which allows the flow of current to pass through without any hinderance is known as conductor or a good conductor. Generally, all metals are conductors.
Insulator: Material which does not allows the flow to current to pass through is known as an insulator or you say a bad conductor. Non-metals are generally insulators.
Posted by Amit Kumar Singh 6 years, 11 months ago
- 3 answers
Aakash Panchal 6 years, 11 months ago
Yogita Ingle 6 years, 11 months ago
Utensils are mainly made up of metals that are good conductor of heat and if the handles are also made up of metals they will also absorb heat and when we pick up a utensil by its handle, it can hurt us or we might have burns. So handles of utensils are made up of wood or plastic.
Posted by Jugraj Singh 6 years, 11 months ago
- 0 answers
Posted by Bharath M 6 years, 11 months ago
- 2 answers
Posted by Aafiya Zohra 6 years, 11 months ago
- 3 answers
Posted by Anup Kujur 6 years, 11 months ago
- 1 answers
Yogita Ingle 6 years, 11 months ago
(1) Coke: contains 98 % carbon. It is porous, tough, black and the purest form of coal. Like charcoal, it Is a good fuel and burns without smoke. It is largely employed as a reducing agent in the extraction of metals from their ores. It is also used in making fuel gases like water gas and producer gas.
(2) Coal tar (liquid): Coal tar is a mixture of different carbon compounds. It thick, black liquid with unpleasant smell. The fractional distillation of coal tar gives many chemical substances which are used in the preparation of dyes, explosives, paints, synthetics fibers, drugs, and pesticides. Some of these chemical substances are benzene, toluene, phenol and aniline. Naphthalene balls used to repel moth and other insects are also obtained from coal tar.
(3) Coal Gas: Coal gas is mainly a mixture of hydrogen, methane and carbon monoxide. The gases present in coal gas are combustible and hence, it is an excellent fuel. It has high calorific value. It was used for lighting houses, factories and streets in Mumbai until 1950. It was also used for cooling earlier.
Posted by Anup Kujur 6 years, 11 months ago
- 3 answers
Aakash Panchal 6 years, 10 months ago
Yogita Ingle 6 years, 11 months ago
CNG stands for Compressed Natural Gas.
Since CNG is a clean burning fuel, combusting it leaves little or no residue compared to gasoline or diesel. Thus, the damage to the pipes and tubes of the vehicle’s engine is greatly reduced.
There is also less particulate matter that can contaminate the motor oil. This results to longer periods in between maintenance procedures such as tune-ups and oil changes.
CNG also has a high ignition temperature of about 1163 degrees Fahrenheit and a flammability rating of approximately 5 to 15% gas in air. This reduces the risk of fire if and when a leak happens.
CNG is also lighter than air and will simply dissipate into the atmosphere in the case of leaks. Meanwhile, gasoline or diesel will pool in the ground when there is a leak which results to a very dangerous fire hazard.
Lastly, CNG is a non-toxic fuel that does not pose any danger of contamination to ground water.
Posted by Amit Kumar Singh 5 years, 8 months ago
- 1 answers
Meghna Thapar 5 years, 6 months ago
Babies are made when special cells called sperm (produced by men) combine with cells called eggs (produced by women) in a process called fertilization. Each of these cells is produced by a process called meiosis which makes cells containing half the information of the parent. When a sperm cell joins with an egg, it's called fertilization. If a sperm cell does join up with your egg, the fertilized egg moves down the fallopian tube toward the uterus. It begins to divide into more and more cells, forming a ball as it grows.
Posted by Pawan Pandey 6 years, 11 months ago
- 2 answers
Yogita Ingle 6 years, 11 months ago
White blood cells (leukocytes) are part of the immune system and have are responsible for tracking and killing pathogens such as bacteria. An important way white blood cells eliminate pathogens is by 'eating' them (pahgocytosis).
White blood cells circulate in the blood stream, but are usually required at the site of infection inside tissues. For this to happen, the white blood cells have to migrate through the walls of small blood vessels and have to be able to find their way in tissues (see image). This can only occur because the white blood cells are able to change shape .
Posted by Sahil Kumar 6 years, 11 months ago
- 1 answers
Amit Kumar Singh 6 years, 11 months ago
Posted by Vidhi Gallani 6 years, 11 months ago
- 2 answers
Posted by Mohammad Mudstaque 6 years, 11 months ago
- 7 answers
Aakash Panchal 6 years, 10 months ago
Divya Prabhu 6 years, 11 months ago
Posted by Hetvi Ahir 6 years, 11 months ago
- 1 answers
Meghna Thapar 5 years, 6 months ago
A fossil fuel, petroleum is formed when large quantities of dead organisms, mostly zooplankton and algae, are buried underneath sedimentary rock and subjected to both intense heat and pressure. Petroleum has mostly been recovered by oil drilling. Petroleum products include transportation fuels, fuel oils for heating and electricity generation, asphalt and road oil, and feedstocks for making the chemicals, plastics, and synthetic materials that are in nearly everything we use.
Posted by Neetu. Tyagi 6 years, 11 months ago
- 2 answers
Posted by To Make Biology Easy 6 years, 11 months ago
- 1 answers
Posted by Vidhi Gupta 6 years, 11 months ago
- 2 answers
Rb Gamer 6 years, 11 months ago
Posted by Sunita Thakur 6 years, 11 months ago
- 2 answers
Pranav Pandey 6 years, 11 months ago
Yogita Ingle 6 years, 11 months ago
Neuron is an individual specialized cell which are primarily involved in transmitting information through electrical and chemical signals. They are found in the brain, spinal cord and the peripheral nerves. Neuron is also known as the nerve cell. There are two types of neurons – sensory neurons and motor neurons. A group of neurons form a nerve. Neurons are the structural and functional units of the nervous system.
Posted by Lovekush Thagela 6 years, 11 months ago
- 3 answers
Posted by Aafiya Zohra 6 years, 11 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
- Rapid combustion: The combustion reaction in which a large amount of heat and light are produced in a short time is called rapid combustion. The immediate burning of cooking gas (LPG) in a gas stove to give heat and light is an example of rapid combustion.
- Spontaneous combustion: The type of combustion in which a material suddenly bursts into flames, without the application of any apparent cause is called spontaneous combustion. The spontaneous combustion reactions which take place in nature are very dangerous. Forest fires can be started by spontaneous combustion reaction.
Posted by Subhashini R 6 years, 11 months ago
- 2 answers
Harshita Sen 6 years, 11 months ago
Posted by Rone Sebastian 6 years, 11 months ago
- 1 answers
Posted by Ravi Meena 6 years, 11 months ago
- 3 answers
Aakash Panchal 6 years, 10 months ago
To Make Biology Easy 6 years, 11 months ago
Posted by Jayalakshmi S 6 years, 11 months ago
- 2 answers
Posted by Dhrub Choudhary 6 years, 11 months ago
- 2 answers
Aakash Panchal 6 years, 10 months ago
Parashar Vrindha 6 years, 11 months ago
Posted by Purva Tawaniya 5 years, 8 months ago
- 1 answers
Ayisha Nidha 6 years, 11 months ago
Posted by Mohit Mehta 6 years, 11 months ago
- 1 answers
Meghna Thapar 5 years, 6 months ago
The angle between incident and the reflected ray will be 0 degrees. The angle between the incident ray and the mirror is called angle of incidence while the angle between reflected ray and the normal is called angle of reflection. Here, the a ray of light is incident normally on a plane mirror. When a ray of light falls normally on the surface of a plane mirror , the following things happen: 1. Incident ray is reflected back along the same path. Angle if incidence is zero and angle of reflection will be zero.
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
Rasmeet Singh Saini 6 years, 11 months ago
1Thank You