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Reducing Nature of Alkali Metals

2n element A ...

Question

2n element A reacts with compound BO3 toproduce A,04 and B,O3. The no. of moles of A,O4produced if one mole each of A and BO3 isreacted, is(2) 32(3) 3(4) 1

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Q. Calculate the

p H

(nearest integer) of a solution containing

6.18 g

H_{3} {B O}_{3}

15.08 g

N a H_{2} {B O}_{3}

K_{H_{3} {B O}_{3}} = 7.3 \times 10^{- 10}

Q. According to following reaction:

A + B O_{3} \to A_{3} O_{4} + B_{2} O_{3}

The number of moles of

A_{3} O_{4}

1

A

1

B O_{3}

Q. The equilibrium constant for the reaction in aqueous solution

H_{3} {B O}_{3} + g y l c e r i n ⇌ (H_{3} {B O}_{3} - g y l c e r i n)

0.90

.
How many moles of glycerin should be added per litre of

0.10 M

H_{3} {B O}_{3}

80

H_{3} {B O}_{3}

is converted to the boric-acid-glycerin complex?

Silica reacts with magnesium to form a magnesium compound (X). X reacts with dil HCl and forms (Y) and (Z). If two moles of HCl react with one mole of X how many moles of Y will be formed?

1

N O

1

O_{3}

10 L

vessel and heated. At equilibrium,

50 %

N O

(by mass) reacts with

O_{3}

according to the equation:

N O (g) + O_{3 (g)} ⇌ N O_{2 (g)} + O_{2 (g)}

What will be the equilibrium constant for this reaction?

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