JEE MAIN 2023 ONLINE 25TH JANUARY MORNING SHIFT

A bowl filled with very hot soup cools from 98\(^\circ\)C to 86\(^\circ\)C in 2 minutes when the room temperature is 22\(^\circ\)C. How long it will take to cool from 75\(^\circ\)C to 69\(^\circ\)C?

Compound A reacts with NH\(_4\)Cl and forms a compound B. Compound B reacts with H\(_2\)O and excess of CO\(_2\) to form compound C which on passing through or reaction with saturated NaCl solution forms sodium hydrogen carbonate. Compound A, B and C, are respectively :

Let \(x,y,z > 1\) and \(A = \left[ {\matrix{ 1 & {{{\log }_x}y} & {{{\log }_x}z} \cr {{{\log }_y}x} & 2 & {{{\log }_y}z} \cr {{{\log }_z}x} & {{{\log }_z}y} & 3 \cr } } \right]\). Then \(\mathrm{|adj~(adj~A^2)|}\) is equal to

The ratio of the density of oxygen nucleus (\(_8^{16}O\)) and helium nucleus (\(_2^{4}\mathrm{He}\)) is

Which one of the following reactions does not occur during extraction of copper?

The statement \(\left( {p \wedge \left( { \sim q} \right)} \right) \Rightarrow \left( {p \Rightarrow \left( { \sim q} \right)} \right)\) is