Download App

Chemical Bonding — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryChemical Bonding3 Marks
Question
Explain the following briefly.
Pure water does not conduct electricity, but on adding sodium chloride to it, it starts conducting electricity.
✓

Answer

Pure water does not conduct electricity because it has a polar covalent molecule hence does not have ions in it which can conduct electricity.
On adding sodium chloride to pure water, sodium chloride breaks apart into sodium and chloride ions because water being polar decreases the strong forces of attraction among sodium and chloride ions. Now, pure water has ions present in it which can conduct electricity.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Question Answer]" from Chemical Bonding→Chemical Bonding — all question types→Chemistry STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

Write (a) molecular formula, (b) electron dot formula and (c) structural formula of ethene (Ethylene).
→
The percentage composition of a gas is : Nitrogen 82.35%, Hydrogen 17.64%.
Find the empirical formula of the gas. [N = 14, H = 1]
→
What volume of oxygen would be required to burn completely $400 ml$ of acetylene $\left[ C _2 H _2\right]$ ? Also calculate the volume of carbon dioxide formed.
$
2 C _2 H _2+5 O _2 \rightarrow 4 CO _2+2 H _2 O ( l )
$
→
In a chemistry lab, a student is given a solution containing an unknown cation. The student adds sodium hydroxide (NaOH) to the solution and observes the formation of a blue precipitate. The student then decides to add ammonium hydroxide to a fresh sample of the solution in excess.
(a) Identify the cation.
(b) What happens when excess of NaOH is added in the solution?
(c) What happens when excess of ammonium hydroxide is added to the solution?
→
A gas of $32 g$ mass has a volume of $20$ litres at $\text{STP}$. Calculate the gram molecular weight of the gas.
→
LPG has $60 \%$ propane and $40 \%$ butane: $10$ litres of this mixture is burnt. Calculate the volume of carbon dioxide added to atmosphere.
$C _3 H _8+5 O _2 \rightarrow 3 CO _2+4 H _2 O$
$2 C _4 H _{10}+13 O _2 \rightarrow 8 CO _2+10 H _2 O$
→
State the reactions occurring at the anode during the electrolysis of :
(i) Copper sulphate solution, using copper electrodes.
(ii) Copper sulphate solution, using platinum electrodes.
(iii) Aluminium oxide, dissolved in cryolite using carbon electrodes.
→
A, B, C and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated. Choose the property (A, B, C or D), depending on which is relevant to each of the preparations (i) to (ii).
A. Dilute acid (typical acid properties)
B. Non-volatile acid
C. Oxidizing agent
D. Dehydrating agent
(i) Preparation of hydrogen chloride.
(ii) Preparation of ethane from ethanol
(iii) Preparation of copper sulphate from copper oxide.
→
Give balanced chemical equation for the following :
(i) Sodium thiosulphate and dilute HCl.
(ii) Calcium hydrogen carbonate and dilute HCI.
(iii) Concentrated hydrochloric acid and potassium permanganate crystals.
→
0.2 g atom of silicon Combine with 21.3 g of chlorine. Find the empirical formula of the compound formed.
→