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प्रश्न
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
उत्तर
The substances formed as a result of a chemical reaction are called products .
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संबंधित प्रश्न
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
FILL IN THE BLANK
........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.
FILL IN THE BLANK
In a ............ change, new substances are formed.
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Explain the following reaction with one suitable example of Combination reactions .
State the conditions necessary for a chemical change or reaction.
Give an example of a reaction where the following are involved
Heat
Write the chemical reaction where the following changes are observed.
Physical state is changed
State the type of reactions for the following represent and balance the ones that are not balanced.
NaOH + HCl → NaCl + H2O
Name: Gas with rotten egg smell.
Name: A greenish-yellow gas.
Give a chemical test to distinguish between the following gases.
H2 and CO2
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Write your observation and a balanced equation in the case of the following substances being heated.
Zinc carbonate.
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
Select the correct answer for the following options:
The gas which reacts with oxygen to give a neutral liquid.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
Explain the following statement: Digestion is a chemical change.
Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.
When lithium metal is placed in hydrochloric acid, _______ gas is evolved.
______ change results in the change of the substance.
State whether the following statements are true or false:
When a candle burns, both physical and chemical changes take place.
Rusting of iron is ______.
______ is a chemical substance is used in whitewashing.
What is thermochemical reactions?
What are the chemical reactions that occur in everyday life?
