Advertisements
Advertisements
प्रश्न
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
उत्तर
\[\ce{2AgNO3->[sunlight]2Ag + 2NO2 + O2}\]
Silver nitrate gets decomposed by sunlight. Hence silver nitrate is stored in coloured reagent bottles.
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
\[\ce{Pb(NO3)2->[heat]}\] _________
Define precipitation.
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 + Cu
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
To prevent rusting, a layer of ______ metal is applied on iron sheets.
Explain the term reactant and product giving examples.
What is a chemical reaction?
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Name: Two nitrates that do not produce nitrogen dioxide on heating.
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Thermal decomposition of mercury [II] oxide.
Give a balanced equation for the conversion of an ammonium salt to a basic gas.
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Which of the following is/are true when milk changes into curd?
- Its state is changed from liquid to semi-solid.
- It changes colour.
- It changes the taste.
- The change cannot be reversed.
Choose the correct option from below:
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
Write a note on the following:
Curdling of milk
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
