$A + 2B \rightarrow AB_{2}$. $36.0 \ g$ of '$A$' (Molar mass: $60 \ g \ mol^{-1}$) and $56.0 \ g$ of '$B$' (Molar mass: $80 \ g \ mol^{-1}$) are allowed to react. Which of the following statements are correct?
$(A)$ '$A$' is the limiting reagent
$(B)$ $77.0 \ g$ of $AB_{2}$ is formed
$(C)$ Molar mass of $AB_{2}$ is $220 \ g \ mol^{-1}$
$(D)$ $15.0 \ g$ of '$A$' is left unreacted after the completion of reaction.
Choose the correct answer from the options given below:

  • A
    $C$ and $D$ only
  • B
    $A$ and $C$ only
  • C
    $B$ and $D$ only
  • D
    $A$ and $B$ only

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When $400 \ mL$ of $0.2 \ M \ H_2SO_4$ is mixed with $600 \ mL$ of $0.1 \ M \ NaOH$, the heat evolved is $3.43 \ kJ$. If the specific heat of water is $4.18 \ J \ K^{-1} \ g^{-1}$, the rise in temperature of the final solution will be ........... $K$. (Assume the specific heat capacity of the final solution is the same as that of water)

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Which of the following has the maximum mass?

Match List-$I$ with List-$II$.
List-$I$ List-$II$
$A$. $16 \ g \ CH_{4(g)}$ $I$. Weighs $28 \ g$
$B$. $1 \ g \ H_{2(g)}$ $II$. $60.2 \times 10^{23}$ electrons
$C$. $1 \ mole \ N_{2(g)}$ $III$. Weighs $32 \ g$
$D$. $0.5 \ mol \ SO_{2(g)}$ $IV$. Occupies $11.2 \ L$ volume at $STP$

Choose the correct answer from the options given below:

What is $Rasavidya$?

Arrange the following in the order of increasing mass (atomic mass: $O = 16, Cu = 63, N = 14$)
$I.$ one atom of oxygen
$II.$ one atom of nitrogen
$III.$ $1 \times 10^{-10}$ mole of oxygen
$IV.$ $1 \times 10^{-10}$ mole of copper

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