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Yogesh Sehgal 6 years, 5 months ago
K@Łp@N@ $Øđh!?? 6 years, 5 months ago
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K@Łp@N@ $Øđh!?? 6 years, 5 months ago
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Posted by Manesh Tandel 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
Electric field lines generally show the properties to account for nature of electric fields. Some general properties of these lines are as follows:
- Electric field lines start from a positive charge and end at a negative charge, in case of a single charge, electric field lines end at infinity
- In a charge-free region, electric field lines are continuous and smooth
- Two electric field lines never intersect or cross each other, as if they do, there will be two vectors depicting two directions of the same electric field, which is not possible
- These lines never form a closed loop. This is because an electric field is conservative in nature and hence the lines don’t form a closed loop.
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K@Łp@N@ $Øđh!?? 6 years, 5 months ago
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Shikha Ekka 6 years, 5 months ago
S.....Sharma☺??? .. 6 years, 5 months ago
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K@Łp@N@ $Øđh!?? 6 years, 5 months ago
Yogita Ingle 6 years, 5 months ago
Dinitrogen (N2) IS formed by sharing three electron pairs between two nitrogen atoms.The two nitrogen atoms are joined by triple bond(N ≡ N). The nitrogen atom is very small in size ,therefore the bond length is also quite small(109.8 pm) & as a result the bond dissociation energy is quite high(946Kj / mol).This reason leads N2 to be very less reactive at room temperature.
Posted by Piyush Chourasia 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
Salicylic acid is treated with acetic anhydride in the presence of H+ to give aspirin.
Posted by Piyush Chourasia 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
We know that,
{tex}log(\frac{N}{N_\circ})=\frac{t}{t_\frac{1}{2}}\times log(\frac{1}{2}){/tex}
N = amount left after decay = 100 - 80 = 20
No= initial amount = 100
t = time for 80% completion reaction
half life = 25 minutes
Substitute all values in formula, we get
{tex}log(\frac{20}{100})=\frac{t}{25}\times log(\frac{1}{2})\\t=58 \ min.{/tex}
Posted by Arushi Tiwari 6 years, 5 months ago
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K@Łp@N@ $Øđh!?? 6 years, 5 months ago
Yogita Ingle 6 years, 5 months ago
ZnO shown non stoichiometric defect under metal excess defect. When zinc oxide is heated it become yellow because on heating it loses oxygen because of which f-centers are generated which give yellow colour.
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K@Łp@N@ $Øđh!?? 6 years, 5 months ago
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Yogesh Sehgal 6 years, 4 months ago
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