1
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
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The number of statements correct from the following for Copper (at. no. 29) is/are ____________.

(A) Cu(II) complexes are always paramagnetic.

(B) Cu(I) complexes are generally colourless

(C) Cu(I) is easily oxidized

(D) In Fehling solution, the active reagent has Cu(I)

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2
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
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Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the manganese product formed from the above reaction is ____________ B.M. (Nearest integer)

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3
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
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Two elements A and B which form 0.15 moles of A2B and AB3 type compounds. If both A2B and AB3 weigh equally, then the atomic weight of A is _____________ times of atomic weight of B.

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4
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
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Total number of possible stereoisomers of dimethyl cyclopentane is ____________.

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