Day 418: JEE Mains Chemistry

1. A.
   540 and $\frac{1}{683}$
2. B.
   540 and 683
3. C.
   450 and $\frac{1}{683}$
4. D.
   450 and 683

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1. A.
   The probability density of finding the electron is maximum at the nucleus
2. B.
   The electron can be found at a distance $2a_{0}$ from the nucleus
3. C.
   The 1 s orbital is spherically symmetrical
4. D.
   The total energy of the electron is maximum when it is at a distance $a_{0}$ from the nucleus

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1. A.
   (C) $<$ (E) $<$ (B) $<$ (A) $<$ (D)
2. B.
   (B) $<$ (C) $<$ (D) $<$ (E) $<$ (A)
3. C.
   (A) $<$ (D) $<$ (C) $<$ (B) $<$ (E)
4. D.
   (A) $<$ (D) $<$ (C) $<$ (E) $<$ (B)

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1. A.
   B and D only
2. B.
   A and C only
3. C.
   B only
4. D.
   A, B, C and D

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1. A.
   Methanol; formaldehyde; methyl chloride; chloroform
2. B.
   Ethanol; acetonitrile; ethylamine; ethylene
3. C.
   Methanol; acetic acid; ethanol; diethyl ether
4. D.
   Acetaldehyde;2-hydroxypropanoic acid; propanoic acid; dipropyl ether

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