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Small Binomial Doubt

how did it break how did (21x20 + 8 )^2024 break in 21m + 8^2024 Ques was finding remainder when 448^2024 was divided by 21...
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Complex numbers

This solution makes sense to me, but here's what I did: argument of (1 + z) / (1 + z_conj) = arg(1+z) - arg(1+z_conj) = arg(1) * arg(z) - arg(1) * arg(z_conj) = 0 since arg(1) = 0 I got 0 using the log-like properties of argument, why am I wrong?...
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Coordinate compounds CFT

why does crystal field split even in case of like Sc3+,if there is no electron in the d orbital then there is no repulsion between ligand and metal in d orbital hence it should not split AND Since CFT is based on electrostatic interactions then how can it have shapes like octahedral or tetrahedral if I remember correctly ionic bonds donโ€™t have shapes...

Atomic Structure

How to du 3... Solution diya hai but it uhhh doesn't make much sense
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What formula is this ๐Ÿ’€

For Q1 I know PE=kZe2/r ye 1/4 e0r kya hai
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thermo 2

Two moles of helium gas undergoes a cyclic process as shown in the fi gure. Assuming ideal behaviour of gas, the magnitude of net work done by the gas in this cyclic process is...
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Thermo

Question 11 I am pretty sure my approach is correct but from my method ans comes when I take given heat of combustion and heat of formation of c2h2, CO2 and h2o with signs opposite of given. Can I do that??...
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AC

First image mai question diya hai .. and mujhe last step mai dikkat aarhi vnet nikalne mai ..
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organic/amines

kuch samajh nhi aa rha, why wont the answer be A?
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Emglish

Any good book/guide suggestion for class 12 english

Definite integral

how do i solve this?
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Organic

I did SN since OTs is good leaving group but solution is SE. Why and how?
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Element name in Periodic Table

Should I learn official name of elements in Periodic table with atomic number 100+ (like Mendelevium) Or Just IUPAC naming (like unnilunium) ...

Chem

Why is the second one the answer? Shouldn't we take angle strain in account?
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ionic

How much solid Na2S2O3 should be added to 1.0 L of water so that 0.0005 mol Cd (OH2) could just barely dissolve?K1 and K2 for S2O3-- complexation with Cd++ are 8.3 ร— 10^3 and 2.5 ร— 10^2, respectively. Ksp (Cd(OH)2 = 4.5 ร— 10โ€“15 ques in case photo is not clear...
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