Advertisements
Advertisements
प्रश्न
Fill in the blank:
The substances which undergo chemical change are called _______
Advertisements
उत्तर
The substances which undergo chemical change are called reactants .
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
N2 + O2 →
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
Write the missing reactants and products and balance the equations.
................+ HCI `→` NaCI + `"H"_2"O"` + .........................
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
What are homogenous reactions ?
State four conditions necessary for chemical reactions to take place.
What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
Explain the term reactant and product giving examples.
Give an example of a reaction where the following are involved
Heat
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
What do you understand by 'chemical reaction'?
Give a chemical test to distinguish between the following gases.
NH3 and SO2
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Distinguish by dilute sulphuric acid.
Copper and magnesium?
Give a word equation for the following reaction.
Two gases which combine to give a solid.
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
State the following reaction represent oxidation or reduction.
\[\ce{Ag->Ag+}\]
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
What changes do you expect?
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Write a word equation for the chemical change, if any.
When magnesium is burnt in the air, a new substance is formed which is ______.
