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Question Bank Solutions for ICSE Class 10 - CISCE - Chemistry

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Chemistry
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Select the ion in each case, that would get selectively discharged from the aqueous mixture of the ions given below:

`"SO"_4^(2-)` , `"NO"_3^-` and `"OH"^-`

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Select the ion in each case, that would get selectively discharged from the aqueous mixture of the ions given below:

`"Pb"^(2+)` , `"Ag"^+` and `"Cu"^(2+)`

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Higher the pH value of a solution, the more ____________ (acidic / alkaline) it is.

[0.07] Metallurgy
Chapter: [0.07] Metallurgy
Concept: Types of Elements: Metals

Choose the correct answer from the options given below :

The particles present in strong electrolytes are :

(A) Only molecules

(B) Mainly ions

(C) Ions and molecules

(D) Only atoms

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Write equations for the reactions taking place at the two electrodes (mentioning clearly the name of the electrode) during the electrolysis of Acidified copper sulphate solution with copper electrodes

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Write equations for the reactions taking place at the two electrodes (mentioning clearly the name of the electrode) during the electrolysis of Molten lead bromide with inert electrodes

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Give reasons why Sodium Chloride will conduct electricity only in the fused or aqueous solution state.

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Explain why it is preferable to use a number of graphite electrodes as the anode instead of a single electrode, during the above electrolysis.

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Give appropriate scientific reasons for Electrolysis is of molten lead bromide is considered to be a redox reaction.

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Write the equation taking place at the anode

[0.06] Electrolysis
Chapter: [0.06] Electrolysis
Concept: Electrolysis

Write a balanced chemical equation for the reaction of sodium hydroxide solution with iron (III) chloride solution

[0.03] Study of Acids, Bases and Salts
Chapter: [0.03] Study of Acids, Bases and Salts
Concept: Acids

Give a reason for Alkali metals are good reducing agents.

[0.07] Metallurgy
Chapter: [0.07] Metallurgy
Concept: Types of Elements: Metals

Three solutions P, Q and R have pH value of 3.5, 5.2 and 12.2 respectively. Which one of these is a:

1) Weak acid?

2) Strong alkali?

[0.03] Study of Acids, Bases and Salts
Chapter: [0.03] Study of Acids, Bases and Salts
Concept: Acids

Define catenation.

[0.09] Organic Chemistry
Chapter: [0.09] Organic Chemistry
Concept: Carbon: a Versatile Element

How do atoms attain noble gas configuration?

[0.02] Chemical Bonding
Chapter: [0.02] Chemical Bonding
Concept: Chemical Bond

Define a chemical bond.

[0.02] Chemical Bonding
Chapter: [0.02] Chemical Bonding
Concept: Chemical Bond

Mention the basic tendency of an atom which makes it to combine with other atoms.

[0.02] Chemical Bonding
Chapter: [0.02] Chemical Bonding
Concept: Chemical Bond

Elements A, B and C have atomic number 17, 19 and 10 respectively.
(a) State which one is: (i) a non-metal (ii) a metal, (iii) chemically inert?
(b) write down the formula of the compound formed by two of the above elements.

[0.02] Chemical Bonding
Chapter: [0.02] Chemical Bonding
Concept: Chemical Bond

Five atoms are labelled from A to E.

Atoms Mass No. Atomic No.
A 40 20
B 19 9
C 7 3
D 16 8
E 14 7

(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?

[0.02] Chemical Bonding
Chapter: [0.02] Chemical Bonding
Concept: Chemical Bond

Match the atomic number 4, 8, 14, 15 and 19 with each of the following:
(a) A solid non-metal of valelncy 3.
(b) A gas of valency 2.
(c) A metal of valency 1.
(d) A non-metal of valency 4

[0.02] Chemical Bonding
Chapter: [0.02] Chemical Bonding
Concept: Chemical Bond
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