#New model of neb physics class 12



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important questions of chemistry from heavy metals class 12

some important questions of class 12 heavy metal chemistry  1.write the chemistry of blue vitriol ?Also mention its chemical properties.              5 2.write the chemistry of    black oxide of copper? also mention its chemical properties.  3.write the chemistry of  red oxide of copper  ? also mention its chemical properties. 4.write the chemistry of   white vitriol   ? also mention its chemical properties. 5.write the chemistry of  white oxide of zinc  ? also mention its chemical properties. 6.write the chemistry of  green vitriol   ? also mention its chemical properties. 7.write the chemistry of  calomel  ? also mention its chemical properties. 8.write the extraction of  copper from is sulphide ore.what is  rimman's green. 9.write the extraction of zinc from zinc blend. 10.write the extraction of iron from  iron pyrites. 11.write ...
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Frequently asked questions of physics class 12

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Most commonly asked question in physics 1.what are wave and wevlets? 2.Explain about double slit experiments 3derive the newton's formula for velocity of sound in air and mention its laplace correction for it. 4what are nuclear fusion and nuclear fission. 5what is alternating current and explain working principle of dynamo. 6. state and explain the Einstein photo electric equation. 7state biot sevart law and use it to circular coil. 8 what is Doppler effect. Explain its major conditions. 9.what are logic gates. Explain them with symbol and circuit diagram. 10.what is mutual induction. Derive its equations for two coaxial coil lying in same plane. 11. What are the  important cause of energy crisis in nepal. Explain. 12.derive the derivations for drift velocity  with its suitable diagram. Some physics model question which are frequently asked in exam. 
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Russia-Ukraine crisis has slapped mining industry in eastern Europe

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  Since 24 February, after Putin declared military operation to invade over Ukraine, NATO allies countries and other country have declared sanction over the trade in Russia. These sanction were meant to degrade the economy of Russia and aid to Ukraine. As a consequences most of the metal mining factory in eastern Europe has suffered huge downfall in their stock. Evraj a metal mining company has suffered more than 50% decline in their stock in this week.
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