Advertisements
Advertisements
Question
Give a word equation for the following reaction.
Two solids which combine on heating, to give a liquid.
Solution
Carbon + Sulphur → Carbon disulphide
C + S → CS2 (l)
APPEARS IN
RELATED QUESTIONS
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Formation of manure from leaves is a physical change.
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.
Complete and balance the following chemical equations
NaCI + `AgNO_3` `→`
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
TRUE \ FALSE
Copper can displace iron from iron sulphate.
Is kerosene an electrolyte or a non-electrolyte ?
Differentiate between in Chemical reaction and chemical equation.
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Give an example of a reaction where the following are involved
Pressure
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
What do you observe when CO2 is passed through lime water first and then a little in excess.
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Give a word equation for the following reaction.
A compound which on heating shows – colour change from brown to yellow.
Explain the following statement: Digestion is a chemical change.
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
When lithium metal is placed in hydrochloric acid, _______ gas is evolved.
Arrange the following statements in correct sequence:
- One side is water-loving and other water-hating molecules.
- When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
- The dirt surrounded by the detergent molecules floats in the water making it dirty.
- Finally, the cloth is clean.
- The detergent molecules have two sides.
- Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.
Write word equations for two chemical reactions with the help of materials given in the box.
Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water
Rusting of iron is ______.
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
Write the equation for the process of formation of rust.
We are advised to not to play with fireworks. Give reason.
Write a note on the following:
Curdling of milk
Write a note on the following:
Fermentation
When carbon dioxide is passed through lime water ______.
______ is the chemical name of slaked lime.