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This section contains 2 paragraphs. Based upon one of paragraph 2 multiple choice questions and based on the other paragraphs 3 multiple choice questions have to be answered. Each of these questions has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct
Paragraph for Question Nos. 10 and 11
The cloud consist of charged particles of water dispersed in air. Some of them are +vely charged and other are -vely charged. When +vely charged clouds come closer they have lightening and thundering whereas - ve and +ve charged colloids come closer they cause heavy rain due to the aggregation of minute particles. It is possible to cause artificial rain by throwing electrified sand or AgI from aeroplane and thus coagulation the mist hanging in air.
When excess of 3 AgNO is treated withKI solution, AgI forms.
  • a)
    + vely charged solution
  • b)
    - vely charged solution
  • c)
    Neutral solution
  • d)
    True solution
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
This section contains 2 paragraphs. Based upon one of paragraph 2 mult...
+vely charged colloid and –vely charged solution
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Explanation:

Given that when excess of 3 AgNO is treated with KI solution, AgI forms. We need to determine the charge of the resulting solution.

To understand the charge of the resulting solution, we need to consider the charges of the reactants involved.

- AgNO is a compound that consists of Ag+ ions and NO- ions. Ag+ ions are positively charged, while NO- ions are negatively charged.
- KI is a compound that consists of K+ ions and I- ions. K+ ions are positively charged, while I- ions are negatively charged.

When AgNO is treated with KI solution, a double displacement reaction takes place. The silver ions (Ag+) from AgNO react with the iodide ions (I-) from KI to form AgI, which is insoluble in water.

The reaction can be represented as:

AgNO + KI → AgI + KNO

Since AgI is insoluble in water, it forms a precipitate. The AgI precipitate consists of Ag+ ions and I- ions. Ag+ ions are positively charged, while I- ions are negatively charged. Therefore, the resulting solution after the reaction is negatively charged.

Hence, the correct option is (B) -vely charged solution.
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