Some Basic Concepts of Chemistry - Result Question 25

####25. The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by $NiCl _2 \cdot 6 H _2 O$ to form a stable coordination compound. Assume that both the reactions are $100 %$ complete. If $1584 g$ of ammonium sulphate and $952 g$ of $NiCl _2 \cdot 6 H _2 O$ are used in the preparation, the combined weight (in grams) of gypsum and the nickel-ammonia coordination compound thus produced is

(Atomic weights in $g mol^{-1}: H=1, N=14, O=16, S=32$,

$Cl=35.5, Ca=40, Ni=59$ )

(2018 Adv.)

Some Basic Concepts of Chemistry

Assertion and Reason

Read the following questions and answer as per the direction given below:

(a) Statement I is true; Statement II is true; Statement II is the correct explanation of Statement I.

(b) Statement I is true; Statement II is true; Statement II is not the correct explanation of Statement I.

(c) Statement I is true; Statement II is false.

(d) Statement I is false; Statement II is true.

Show Answer

Solution:

  1. Molality is defined in terms of weight, hence independent of temperature. Remaining three concentration units are defined in terms of volume of solution, they depends on temperature.


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