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Potassium Dichromate

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Question

Write the balanced chemical equation when lead(II) nitrate reacts with potassium chromate.

A

2 P b (N O_{3})_{2} + K_{2} C r O_{4} \to 2 K N O_{3} + 2 P b C r O_{4}

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B

P b (N O_{3})_{2} + 2 K_{2} C r O_{4} \to 4 K N O_{3} + P b C r O_{4}

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C

2 P b (N O_{3})_{2} + K_{2} C r O_{4} \to 2 K N O_{3} + P b C r O_{4}

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D

P b (N O_{3})_{2} + K_{2} C r O_{4} \to 2 K N O_{3} + P b C r O_{4}

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Solution

The correct option is C $P b (N O_{3})_{2} + K_{2} C r O_{4} \to 2 K N O_{3} + P b C r O_{4}$
When lead nitrate reacts with potassium chromate formation of lead chromate and potassium nitrate occurs. It is an example of replacement reaction. The balanced chemical equation is $P b (N O_{3})_{2} + K_{2} C r O_{4} \to 2 K N O_{3} + P b C r O_{4}$ . So the correct option is D

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Similar questions

Q. Find the number of yellow coloured water insoluble compound.

P b I_{2}, P b C r O_{4}, K I, N a I, A g_{2} C r O_{4}, B a C r O_{4},

K_{2} C r O_{4}, (N H_{4})_{3} P O_{4} .12 M o O_{3}, H g O, A g I, A g C l

Q. How many atoms are present in the given reaction?

{P b ({N O}_{3})}_{2} + 2 K I \to P b I_{2} + 2 K N O_{3}

Q. Observe the following chemical equation. And answer the questions.

P b (N O_{3})_{2} + 2 K I \to P b I_{2} + 2 K N O_{3}

(i) What are the reactants?
(ii) What are the products?
(iii) Which type of chemical reaction it is?
(iv) What is the colour of

P b I_{2}

Q. When an aIkaline solution of

K_{2} C r O_{4}

is treated with 3%

H_{2} O_{2}

solution, red brown paramagnetic peroxochromate is obtained as per following equation:

2 K_{2} C r O_{4} + 7 H_{2} O_{2} + 2 K O H \to 2 K_{3} C r O_{8} + 8 H_{2} O

The equivalent weight of

K_{2} C r O_{4}

, for above transformation must be:

M

is the molar mass of

K_{2} C r O_{4}

)

Potassium nitrate on strong heating decomposes as under:
2KNO₃ $\overset{∆}{\to}$ 2KNO₂+ O₂
Calculate:
(i) weight of potassium nitrite formed.
(ii) weight of oxygen formed when 5.05 g of potassium nitrate decomposes completely.
(K = 39, O = 16, N = 14)

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