Chemistry The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is 5x 5x/36 x/6 7.2 x 5x 5x/36 x/6 7.2 x ANSWER DOWNLOAD EXAMIANS APP
Chemistry When cathode rays strike a target of high atomic weight, they give rise to ? and ? rays Positive rays ?-rays X-rays ? and ? rays Positive rays ?-rays X-rays ANSWER DOWNLOAD EXAMIANS APP
Chemistry What are the number of moles of CO2 which contains 16 g of oxygen? 0.25 mole 0.4 mole 0.2 mole 0.5 mole 0.25 mole 0.4 mole 0.2 mole 0.5 mole ANSWER DOWNLOAD EXAMIANS APP
Chemistry Why is water not suitable for putting out a petrol fire ? The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water The oxygen content of water is isolated by petrol and thus it helps in burning Water, being heavy, slips below petrol which thus remains in contact with air and burns The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water The oxygen content of water is isolated by petrol and thus it helps in burning Water, being heavy, slips below petrol which thus remains in contact with air and burns ANSWER DOWNLOAD EXAMIANS APP
Chemistry A pungent smell often present near the urinals is due to Chlorine Urea Sulphur-di- oxide Ammonia Chlorine Urea Sulphur-di- oxide Ammonia ANSWER DOWNLOAD EXAMIANS APP
Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuSO4 Cu(NO3)2 CuO CuCO3 Cu(OH)2 CuSO4 Cu(NO3)2 CuO CuCO3 Cu(OH)2 ANSWER DOWNLOAD EXAMIANS APP
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