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HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

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Third layer of spheres is added to second layer so as to form hcp or ccp structure. What is the difference between the addition of third layer to form these hexagonal close-packed structures?

[1] Solid State
Chapter: [1] Solid State
Concept: undefined >> undefined

The pH of 10−8 M of HCl is ______.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

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Which of the following solution will have a pH value equal to 1.0?

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

Choose the most correct answer :

Blood in the human body is highly buffered at a pH of ________.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

Choose the most correct answer :

For pH > 7 the hydronium ion concentration would be _________.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

Answer the following in one sentence:

The pH of a solution is 6.06. Calculate its H+ ion concentration.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

Answer the following in one sentence :

Calculate the pH of 0.01 M sulphuric acid.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

Derive the relation pH + pOH = 14.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

Answer the following in brief :

The pH of a weak monobasic acid is 3.2 in its 0.02 M solution. Calculate its dissociation constant.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

In NaOH solution [OH] is 2.87 × 104. Calculate the pH of the solution.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

Define pH.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

Answer the following in one or two sentences.

Write any two functions of salt bridge.

[5] Electrochemistry
Chapter: [5] Electrochemistry
Concept: undefined >> undefined

Answer the following in one or two sentences.

Formulate a cell from the following electrode reactions:

`"Au"_(("aq"))^(3+) + 3"e"^(-) -> "Au"_(("s"))`

Mg(s) → `"Mg"_(("aq"))^(2+)` + 2e-

[5] Electrochemistry
Chapter: [5] Electrochemistry
Concept: undefined >> undefined

Answer the following in one or two sentences.

What is the significance of the single vertical line and double vertical line in the formulation galvanic cell?

[5] Electrochemistry
Chapter: [5] Electrochemistry
Concept: undefined >> undefined

Answer the following :

The pH of rainwater collected in a certain region of Maharashtra on a particular day was 5.1. Calculate the H+ ion concentration of the rainwater and its percent dissociation.

[3] Ionic Equilibria
Chapter: [3] Ionic Equilibria
Concept: undefined >> undefined

What is a salt bridge?

[5] Electrochemistry
Chapter: [5] Electrochemistry
Concept: undefined >> undefined

Select appropriate answers for the following.

Stability of interhalogen compounds follows the order _______.

[7] Elements of Groups 16, 17 and 18
Chapter: [7] Elements of Groups 16, 17 and 18
Concept: undefined >> undefined

Select appropriate answers for the following.

BrCl reacts with water to form _______.

[7] Elements of Groups 16, 17 and 18
Chapter: [7] Elements of Groups 16, 17 and 18
Concept: undefined >> undefined

Select appropriate answers for the following.

Chlorine reacts with excess of fluorine to form _______.

[7] Elements of Groups 16, 17 and 18
Chapter: [7] Elements of Groups 16, 17 and 18
Concept: undefined >> undefined

In interhalogen compounds, which of the following halogens is never the central atom?

[7] Elements of Groups 16, 17 and 18
Chapter: [7] Elements of Groups 16, 17 and 18
Concept: undefined >> undefined
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