Advertisements
Advertisements
प्रश्न
Write true or false :
Hydrogen sulphide has rotten egg smell .
पर्याय
True
False
Advertisements
उत्तर
True
APPEARS IN
संबंधित प्रश्न
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.)
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
FILL IN THE BLANK
On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Electron ______ is complete in each hydrogen in a hydrogen molecule.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Sodium chloride
What is a chemical reaction?
Give an example of the following chemical changes.
A reaction where colour change is noticed.
Name: A brown gas
Name: Two nitrates that do not produce nitrogen dioxide on heating.
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Calcium hydroxide.
Limestone contains ______ mainly.
Analogy:
H2O: Water:: NaCl: ______.
Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.
Give an example where heat, light, and sound are produced during a chemical change.
