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Ibhawana Upreti 5 years, 5 months ago
Arpita Sharma 5 years, 5 months ago
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MLAs are elected by the people. They represent people. Each state in India has a legislative assembly. Each state is divided into different areas called constituencies. From each constituency the people elect one representative who then becomes an MLA. These MLAs belong to different parties. A political party whose MLAs have won more than half the number of constituencies can be said to be in a majority. The political party that has majority is called the ruling party. All other parties are called the opposition.
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Posted by Anil Gharat Poonam Gharat 5 years, 5 months ago
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Ibhawana Upreti 5 years, 5 months ago
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(a) Photosynthesis — Chemical change
(b) Dissolving sugar in water — Physical change
(c) Burning of coal - Chemical change
(d) Melting of wax - Physical change
(e) Beating aluminium to make aluminium foil - Physical change
(f) Digestion of food - Chemical change
Posted by Vikhyat.B Alibadi 5 years, 5 months ago
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Posted by Varshini Nachinarkkiniyan 5 years, 5 months ago
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Shubham Singh 5 years, 5 months ago
Gaurav Seth 5 years, 5 months ago
INDICATORS:
An indicator is a substance that changes its colour in acidic and basic medium.An indicator shows one colour in acidic medium and different colour in basic medium so that they are called indicators.
eg:-Litmus , turmeric
There are 3 types of indicators:
● Natural lndicators
lndicators derived from natural sources are called natural indicators.
eg:- Litmus , red cabbage , turmeric , china rose petals etc..
● Synthetic indicators
lndicators prepared in laboratary are callwd synthetic indicators.
eg:- Phenophtaline , methyl orange etc..
● Olfactory indicators
lndicators which give different odours in acidic and basic medium.
eg:-Onion , vanila essence etc
Posted by Varshini Nachinarkkiniyan 5 years, 5 months ago
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Maharnab Das 5 years, 5 months ago
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Incisors are present at the front of the mouth. These teeth have sharp edges and are adapted for cutting food into small, chewable pieces. Humans have eight incisors, four incisors in the upper jaw and four in the lower jaw.
Posted by Preeti Sikka 5 years, 5 months ago
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Ibhawana Upreti 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
|
Acids |
Bases |
|
1. Its taste is sour. |
Its taste is bitter. |
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2. It turns blue litmus paper to red. |
It turns red litmus paper to blue. |
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3. It contains hydrogen ion (H+). |
It contains hydroxyl ion(OH-) |
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4. It doesn’t feel soapy to touch. |
It feels soapy to touch. |
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5. Examples: Curd, lemon juice and Vinegar. |
Examples: Baking soda, Soap and lime water. |
Posted by Shivam Kumar 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Acid Rain as the name suggests can be said to be the precipitation of acid in the form of rain in the simplest manner. When atmospheric pollutants like oxides of nitrogen and sulphur react with rainwater and come down with the rain, then this results in Acid Rain.
Posted by Kartik Mulgir 5 years, 5 months ago
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Shubham Singh 5 years, 5 months ago
Jatin Pujari 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
The process of making of food by green plants in the presence of sunlight and chlorophyll is known as photosynthesis.
Chlorophyll present only in plants. So, photosynthesis is on plant
Posted by Mandar Dhuri 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Freezers are always on top of a fridge due to the nature of convection. The natural law of convection is that warm air rises while cold air falls, so the freezer at the top provides cold air for the other compartments at the bottom of the freezer
Posted by Swatantranagar Girls 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
No, a geyser and a television set require different amount of current. Therefore, the fuse used in these will be of different ratings.
Posted by Dnyaneshwar Chormale 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
A virtual image is formed when reflected rays appear to meet. Such images cannot be obtained on screen. Plane mirrors, convex mirror and concave lens always forms virtual image.
Posted by Yogesh Bhai 5 years, 5 months ago
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Meghna Thapar 5 years, 5 months ago
Capillary action is important for moving water (and all of the things that are dissolved in it) around. It is defined as the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension. Adhesion of water to the walls of a vessel will cause an upward force on the liquid at the edges and result in a meniscus which turns upward. The surface tension acts to hold the surface intact. Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules.
Posted by Jatin Pujari 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
Laboratory thermometer
- Clinical thermometer can never be used for measuring the temperature of any object other than human body.
- It is used to measure the temperatures in school or other laboratories for scientific purpose as they measure temperatures to a range higher than clinical thermometers.
- One such thermometer is known as the laboratory thermometer with a scale generally ranging from –10°C to 110°C. It has a long stem with a silver bulb at the end unlike clinical thermometer.
- The silver colour at the bulb normally points toward the presence of mercury which expands with the rise in temperature thereby raising the reading and contracts on lowering of temperature thereby lowering the reading.
Posted by Parmita Parashar 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
Pollination
Transfer of pollen grains from anther to stigma is termed as Pollination. This transfer of pollen grains occurs with the help of pollinating agents like wind, water, insects, birds etc.
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The formula of acetic acid is CH3COOH and the formula of sodium hydrogen carbonate is NAHCO3.
When they are mixed they react and produce carbon dioxide gas that erupts out as bubbles from the solution producing water also.
The formula is CH3COOH + NAHCO3 → CH3COONA + H2O + CO2
Posted by Ishika Singh 5 years, 5 months ago
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Nandini. Saroj. 5 years, 5 months ago
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Digital Thermometer: In digital thermometer, reading of temperature is displayed digitally as in digital watches. This is safer because no mercury is used in this. It is important to note that mercury is a highly toxic substance.
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Rearing of Silkworm: In the beginning, the female silk moth lays hundreds of eggs. These eggs are stored over a clean paper or piece of cloth. These eggs are then sold to the silkworm farmers. The farmers then keep the eggs under the accurate temperature and humidity at a clean place. They are warmed to the most appropriate temperature to hatch eggs to produce larvae or caterpillar. This process is done when the mulberry trees have fresh crop of leaves. The caterpillar eats this mulberry leaves day and night and it grows in size.
Bamboo trays are used to keep these caterpillars and some freshly chopped mulberry leaves are kept in the tray. After 30-40 days approximately the caterpillars stop eating the leaves and then it moves inside the small chambers in the bamboo trays to spin cocoons. These are produce by the secretion of liquid protein from their salivary glands. Small racks are given in the trays so that the cocoons get attached to those racks. Silk moths are developed inside the cocoons.
Processing Silk from Cocoons: These cocoons are used to obtain silk threads. When the cocoons are exposed to the sun or steam or boiled, the silk fib gets separated. This process of getting silk threads from the cocoons to use it as a silk fabric is known as reeling of the silk. Reeling of the silk is carried out by special machines. These machines unwind the fibers of silk or threads from the cocoon. Silk fibers are then converted into silk threads to make different kinds of silk fabrics like silk sarees, etc. by the weavers.
Posted by Gitansh Mehra 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
The given reaction is known as combination reaction.
Explanation:
A combination reaction is defined as a chemical reaction in which two compounds react together to form a single product.
In the given chemical reaction, calcium oxide solid is reacting with silicon dioxide gas to produce calcium metasilicate.
The chemical equation for the above reaction follows:
The given reaction is an example of combination reaction.
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Gaurav Seth 5 years, 5 months ago
Transfer of heat from one particle to the adjacent particle is known as conduction of heat. In solids, heat is transferred by the process of conduction. In this process, the transfer of heat takes place through adjacent molecules.
Example: When one end of an iron rod is put over flame then part which is nearer to the flame is heated first and heat is gradually transferred to the other end of the rod. This happens because particles of iron rod which are nearer to the flame receive the heat and transfer this to the adjacent particles. Subsequently, the adjacent particles transfer the heat to the next adjacent particles. This process continues and heat reaches to the other end of the rod. Thus, heat transfer in solid takes place through conduction.
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