GSEB std 10 science solution for Gujarati check Subject Chapters Wise::
જવાબ : Pyrotechnics is the science of fireworks.
જવાબ : The household match is a special pyrotechnic device because all the pyrotechnics effects - heat, smoke, light, gas and sound are present in it.
જવાબ : The basic material used in fireworks is black powder.
જવાબ : Shukranti has references to weapons similar to guns and projectile weapons.
જવાબ : The Chinese developed black powder more than one thousand years ago.
જવાબ : Roger Bacon, an English monk, revealed the formula for black powder in 1242.
જવાબ : Roger Bacon wrote about black powder in code language because he considered it a very dangerous substance.
જવાબ : Incandescent light is produced when a substance is heated so much that it begins to glow.
જવાબ : The temperature of a firework is controlled so that the glow of its metallic substances can be manipulated to be a desired color at the proper time.
જવાબ : Fireworks were imported from China.
જવાબ : The safety match producers of Sivakasi in Tamil Nadu began manufacturing fireworks in India.
જવાબ : Fire accidents take place in Sivakasi because there are hardly any safety measures in force there and there are very few testing facilities for quality or uniformity.
જવાબ : Only a few reliable persons are taught the art of manufacturing fireworks because it is not considered safe to give everybody the details.
જવાબ : Fireworks should never be stored or unpacked near a flame, gas cylinder or heater.
જવાબ : While lighting fireworks, we should not wear long, loose or nylon clothes.
જવાબ : Fireworks should never be lit inside a house and we should never bend over a firework when we are lighting it.
જવાબ : The science of fireworks is called ‘pyrotechnics’.
જવાબ : The two words ‘pyr’ and ‘technics’ form the word ‘pyrotechnics’.
જવાબ : The household match is considered a special pyrotechnic device because the pyrotechnic effects- heat, smoke, light; gas and sound are present in it.
જવાબ : Roger Bacon revealed the formula of black powder in 1242.
જવાબ : Roger Bacon wrote of it in a code language because he considered it as a dangerous substance.
જવાબ : The Chinese are generally considered the pioneers of pyrotechnics.
જવાબ : Aluminum, magnesium and titanium are the elements burning at high temperature.
જવાબ : The pyrotechnics 1s a combination of potassium nitrate, charcoal and sulphur in the ratio of 75:15:10 by weight.
જવાબ : The fireworks were imported from China before Second World War.
જવાબ : Sivakasi is situated in Tamil Nadu.
જવાબ : We stopped import of fireworks from China during the Second World War.
જવાબ : The Chinese have developed ‘black powder’ more than one thousand years ago.
જવાબ : The black powder is the blend of potassium nitrate, charcoal and sulphur in the ratio of 75:15: 10. This formula has remained unchanged for centuries.
જવાબ : Experts say that black powder might be the only chemical products still using the same age old proportions and manufacturing techniques.
જવાબ : The principle behind any firework is when heat is applied to fuel it burns using oxygen.
જવાબ : The firework make loud noise because the fuel is packed tightly to keep the heat in. The burning takes place all of a sudden which makes loud noise.
જવાબ : The imports from China were stopped due to the Second World War.
જવાબ : 60 to 70 percent of fireworks from Sivakasi were used in the country.
જવાબ : True
જવાબ : True
જવાબ : False
જવાબ : False
જવાબ : True
જવાબ : False
જવાબ : True
જવાબ : False
જવાબ : True
જવાબ : True
જવાબ : False
જવાબ : False
જવાબ : True
જવાબ : False
જવાબ : True
જવાબ : False
જવાબ : True
જવાબ : False
જવાબ : False
જવાબ : False
જવાબ : False
જવાબ : True
જવાબ : True
જવાબ : False
જવાબ : False
જવાબ : True
જવાબ : False
જવાબ : True
જવાબ : False
જવાબ : False
જવાબ : True
જવાબ : The science of fireworks is called, ‘pyrotechnics’. It is derived from the Greek word ‘pyr’ meaning fire and ‘technics’ meaning an art. Pyrotechnics includes not only fireworks but also a whole range of devices that use similar materials and principles, from safety matches that we use every day to solid fuel rocket boosters of the space shuttle.
The household match is considered a special pyrotechnic device, as all the pyrotechnics effects -heat, smoke, light, gas and sound-are present in it. The Chinese are considered the pioneers of pyrotechnics. The greatest danger of pyrotechnics is that it deals with fire.જવાબ : Black powder, also known as gun powder, is the basic material used in fireworks. Some historians say that it was invented in India. Shukranti, written more than two thousand years ago, has references to weapons similar to guns and projectile weapons.
However, the Chinese are said to have developed black powder more than one thousand years ago. In 1242, an English monk, Roger Bacon, revealed the formula for black powder. He considered it such a dangerous substance that he wrote of it in code language. The basic formula of the black powder has remained unchanged for centuries. It is a blend of potassium nitrate, charcoal and sulphur in the ratio of 75:15:10 by weight.જવાબ : Fireworks should be stored, handled and lit with care. They should never be stored or unpacked near a flame, gas cylinder or heater. One should never wear long, loose clothes or nylon clothes when lighting crackers. And since the powder in crackers is poisonous, they should never be carried loose in your pocket or in your hand.
Fireworks should never be lit inside a house. Never bend over a firework when you are lighting it. If you do get a burn, go to a doctor instead of applying oil or ointment.Make negative and interrogative: Kavita sings a song.
Hide | Showજવાબ :
Negative: kavita does not sing a song.
Interrogative: Does kavita sing a song?
Make negative and interrogative: Bhoomi teaches me English.
Hide | Showજવાબ :
Negative: Bhoomi does not teach me English.
Interrogative: Does Bhoomi teach me English?
Make negative and interrogative: They read newspaper every day.
Hide | Showજવાબ :
Negative: They do not read news paper every day.
Interrogative: Do they read newspaper every day?
Make negative and interrogative: Veda often watches T.V
Hide | Showજવાબ :
Negative: Veda does not watch T.V often.
Interrogative: Does Veda often watch T.V?
Make negative and interrogative: Keshav usually travel by bus.
Hide | Showજવાબ :
Negative: Keshav usually does not travel by bus.
Interrogative: Does Keshav usually travel by bus?
Make negative and interrogative: The children play cricket.
Hide | Showજવાબ :
Negative: The children do not play cricket.
Interrogative: Do the children play cricket?
Make negative and interrogative: The boys run slow.
Hide | Showજવાબ :
Negative: The boys do not run slow.
Interrogative: Do the boys run slow?
Take a Test
Playing with Fire
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