Advertisements
Advertisements
प्रश्न
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Advertisements
उत्तर
The basic conditions necessary for a chemical reaction is close contact .
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Condensation of steam is not a chemical change.
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
What do you observe when iron nail is kept in copper sulphate solution for sometime.
What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.
How is a strong electrolyte different from a weak electrolyte?
Balancing a chemical equation is based on
Explain the following reaction with one suitable example of Combination reactions .
Name the type of chemical reaction shown by the following equation:
2Mg + O2 → 2MgO
Give an example of the following chemical change.
A reaction where colour change is noticed
Name: Two nitrates that do not produce nitrogen dioxide on heating.
Give a chemical test to distinguish between the following gases.
NH3 and SO2
Write your observation and a balanced equation in the case of the following substances being heated.
Zinc carbonate.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Give a suitable example with an equation to show the representation of a chemical reaction.
________ is a chemical substance which alters the speed of a chemical reaction.
