Advertisements
Advertisements
Question
Give a word equation for the following reaction.
An exothermic reaction where both the reactants are gases, one of which is oxygen.
Solution
Hydrogen + Oxygen → water
2H2(g) + O2(g) → H2O(l)
APPEARS IN
RELATED QUESTIONS
Complete and balance the following chemical equations:
Fe `"SO"_4` + NaOH `→`
(aq.) (aq.)
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
FILL IN THE BLANK
........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.
Fill in the blank.
Melting of ice is a _______ change.
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
Give an example of a reaction where the following are involved
Catalyst
Write the chemical reaction where the following changes are observed.
Colour change is noticed
What do you observe? When
Water is added to the quick lime.
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
Give a chemical test to distinguish between the following gases.
CO2 and SO2
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc carbonate to zinc oxide
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
Match the chemical reactions in List I with the appropriate answer in List II.
| List I | List II | ||
| 1. | \[\ce{XY⇌[heat]X + Y}\] | A: | Displacement reaction |
| 2. | \[\ce{XY->X + Y}\] | B: | Double decomposition |
| 3. | \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] | C: | Endothermic reaction |
| 4. | \[\ce{X + YZ->XZ + Y}\] | D: | Thermal dissociation |
| 5. | \[\ce{X + Y->[heat]XY -\Delta}\] | E: | Decomposition reaction |
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Explain the term chemical reaction with special reference to reactants and products.
Mention the various conditions required for a chemical reaction to occur.
A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
The percentage composition of Nitrogen in Ureas is ______.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Is the conversion of milk into ice cream a chemical change?
What is the difference between reactants and products?
What are the chemical reactions that occur in everyday life?
