Advertisements
Advertisements
प्रश्न
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
Advertisements
उत्तर
NaOH + HCl → NaCl + H2O => Double decomposition reaction .
APPEARS IN
संबंधित प्रश्न
What are (i) positive catalysts and (ii) negative catalysts? Support your answer with one example for each of them.
FILL IN THE BLANK
Negatively charged ions are called ..........
FILL IN THE BLANK
Positively charged ions are called ........
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
A chemical equation is a statement that describes a chemical change in terms of
Name the type of chemical reaction shown by the following equation:
CaCO3 → CaO + CO2
Write the chemical reaction where the following changes are observed.
Precipitate is formed
Explain,giving one example of the following chemical changes:
Reversible reaction
State the type of reactions for the following represent and balance the ones that are not balanced.
NaOH + HCl → NaCl + H2O
Multiple choice:
Which of the following is not a characteristic of a chemical change?
What do you observe? When
Water is added to the quick lime.
Give a chemical test to distinguish between the following gases.
NH3 and SO2
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Copper nitrate.
Mention the various conditions required for a chemical reaction to occur.
Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.
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.
Is the conversion of milk into ice cream a chemical change?
