Download App

Electro Chemistry — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryElectro Chemistry2 Marks
Question
What do you mean by Primary Cell?
✓

Answer

A primary cell is that in which redox reaction occurs only once i.e., it is not rechargeable.
It means in primary cells the electrode reaction cannot be reversed by an external electrical energy source and it becomes dead over a period of time. It cannot be used again. Typical primary cells are Daniell cell, Dry cell and Mercury cell.

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 "2 Marks Questions" from Electro Chemistry→Electro Chemistry — all question types→Chemistry STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

(i) Give two methods in which $> C = O$ group is converted into $> C H _2$ group.
(ii) In the purification of aldehydes sodium bi-sulphite is used, why?
→
A first order reaction takes 20 minutes for 25% decomposition. Calculate the time when 75% of the reaction will be completed. (Given : log 2 = 0·3010, log 3 = 0·4771, log 4 = 0·6021)
→
A first order reaction has a rate constant of $0.0051\ min^{–1}$. If we begin with $0.10 M$ concentration of the reactant, what concentration of reactant will remain in solution after $3$ hours?
→
How will you bring the following conversions?
Phenol to aspirin.
→
Cyanide ion acts as an ambident nucleophile. From which end it acts as a stronger nucleophile in aqueous medium? Give reason for your answer.
→
For the first order thermal decomposition reaction, following data were obtained$:$
$\ce{C_2H_5Cl(g)}$ $\xrightarrow{\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }}$ $\ce{C_2H_4(g) + HCl(g)}$
Time$/\sec$   Total pressure$/atm$
$0$   $0.30$
$300$   $0.50$
Calculate the rate constant. $($Given $: \ce{log  2 = 0.301, log  3 = 0.4771, log 4 = 0.6021)}$
→
Complete the following equations :
(i) $CH _3- CH _2- Cl \xrightarrow{+ A } B \xrightarrow{ C } CH _3- CH _2- NH _2+ HCOOH$
(ii) $CH _3- I \xrightarrow{+ A } B \xrightarrow{ C } CH _3- NH - CH _3$
→
How are vitamin classified? Name the vitamin responsible for the coagulation of blood.
→
For the decomposition of azoisopropane to hexane and nitrogen at $543 K,$ the following data are obtained.
$t (\sec)$ $P(mm$ of $Hg)$
$0$ $35.0$
$360$ $54.0$
$720$ $63.0$
Calculate the rate constant.
→
Boiling point of ethanol is higher in comparison to methoxymethane.
→