Chemistry NCERT Exemplar Solutions Class 11th Chapter One

Due to the larger acid dissociation constant (Ka) sulphuric acid acts as an acid and HNO₃ acts as a base.

$\left[C{l}^{-}\right]=10^{-1}M$

$\left[Cr{O_4}^{--}\right]=10^{-3}M$

for AgCl ppt¹, ${\left[A{g}^{+}\right]}_{req}=\frac{1.7*10^{-10}}{10^{-1}}M$  

For Ag₂CrO₄ppt², ${\left[A{g}^{+}\right]}_{req}=\sqrt[]{\frac{1.9*10^{-12}}{10^{-3}}}M$

${\left[A{g}^{+}\right]}_{req}=4.3*10^{-5}M$

Being lower concentration of [Ag⁺] in case of AgCl, it will precipitate first.

Kindly consider the following figure

Regarding industrial consumption of H₂ manufacturing of NH₃ is the largest applications.

Due to the absence of acidic hydrogen in But – 2-yne, metallic sodium does not react with this.

In metamers, distribution of alkyl groups are changed with respect to polyvalent functional groups.

ln $Cul,C{u}^{+}has3d^{10}4s^0,\left[n=0and\mu =0BM\right]$

ln   $\left[Cu{\left(N{H}_3\right)}_4\right]C{l}_2,C{u}^{++}has3d^{9}4s^0\left[n=1and\mu =1.73BM\right]$

$ln{O}_2^{-}\&{O_2}^{+}$ only one electron is unpaired in anti bonding MO,

Hence [n = 1 and $\mu$ = 1.73 BM]

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This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Option (C) The combustion reaction of methane is given below

CH₄ + O₂ ->  CO₂ + H₂O

In this reaction, water and carbon dioxide are formed.

According to the reaction, 1 mole of methane gives 2 moles of water. So, 16 g of methane gives 36 g of water

Thus, X is false but R is true

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Option (C)

In the decimal portion, only trailing or final zeros are significant. This is in accordance with the rules of significant figures.

The given number, 0.200 has 3 significant figures whereas the number, 200 has only one significant figure because zeros present on the right side or at the end of the decimal number are significant and it is provided that they are present on the right side of the decimal point.

Also, zeros are not significant in numbers without decimals. Thus, X is true but R is false.