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Class 10 > Chemistry - Analytical Chemistry > Flashcards

Chemistry - Analytical Chemistry Flashcards

1
Q

Name the colour of the precipitate formed by Ca²⁺ when reacted with NaOH (normal) and its solubility.

A

White precipitate. Sparingly soluble in excess NaOH.

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2
Q

Name the colour of the precipitate formed by Ca²⁺ when reacted with NH₄OH (normal and excess) and its solubility.

A

No reaction in both normal and excess NH₄OH.

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3
Q

Name the colour of the precipitate formed by Cu²⁺ when reacted with NaOH (normal) and its solubility.

A

Pale blue precipitate. Insoluble in excess NaOH.

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4
Q

Name the colour of the precipitate formed by Cu²⁺ when reacted with NH₄OH (normal) and its solubility.

A

Pale blue precipitate. Soluble in excess NH₄OH.

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5
Q

Name the colour of the precipitate formed by Fe²⁺ when reacted with NaOH (normal) and its solubility.

A

Dirty green precipitate. Insoluble in excess NaOH.

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6
Q

Name the colour of the precipitate formed by Fe²⁺ when reacted with NH₄OH (normal) and its solubility.

A

Dirty green precipitate. Insoluble in excess NH₄OH.

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7
Q

Name the colour of the precipitate formed by Fe³⁺ when reacted with NaOH (normal) and its solubility.

A

Reddish-brown precipitate. Insoluble in excess NaOH.

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8
Q

Name the colour of the precipitate formed by Fe³⁺ when reacted with NH₄OH (normal) and its solubility.

A

Reddish-brown precipitate. Insoluble in excess NH₄OH.

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9
Q

Name the colour of the precipitate formed by Zn²⁺ when reacted with NaOH (normal) and its solubility.

A

Gelatinous white precipitate. Soluble in excess NaOH.

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10
Q

Name the colour of the precipitate formed by Zn²⁺ when reacted with NH₄OH (normal) and its solubility.

A

Gelatinous white precipitate. Soluble in excess NH₄OH.

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11
Q

Name the colour of the precipitate formed by Pb²⁺ when reacted with NaOH (normal) and its solubility.

A

Chalky white precipitate. Soluble in excess NaOH.

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12
Q

Name the colour of the precipitate formed by Pb²⁺ when reacted with NH₄OH (normal) and its solubility.

A

Chalky white precipitate. Insoluble in excess NH₄OH.

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13
Q

Complete the equation: Zn + 2NaOH →

A

Zn + 2NaOH → Na₂ZnO₂ + H₂

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14
Q

Complete the equation: 2Al + 2NaOH + 2H₂O →

A

2Al + 2NaOH + 2H₂O → 2NaAlO₂ + 3H₂

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15
Q

Complete the equation: Pb + 2NaOH →

A

Pb + 2NaOH → Na₂PbO₂ + H₂

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16
Q

Complete the equation: ZnO + 2NaOH →

A

ZnO + 2NaOH → Na₂ZnO₂ + H₂O

17
Q

Complete the equation: Zn(OH)₂ + 2NaOH →

A

Zn(OH)₂ + 2NaOH → Na₂ZnO₂ + 2H₂O

18
Q

Complete the equation: Al₂O₃ + 2NaOH →

A

Al₂O₃ + 2NaOH → 2NaAlO₂ + H₂O

19
Q

Complete the equation: Al(OH)₃ + NaOH →

A

Al(OH)₃ + NaOH → NaAlO₂ + 2H₂O

Class 10 (15 decks)

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