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प्रश्न
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
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उत्तर
A catalyst is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
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संबंधित प्रश्न
Complete and balance the following chemical equations
NaCI + `AgNO_3` `→`
FILL IN THE BLANK
Positively charged ions are called ........
What are chemical reactions?
Write a short note on the information derived from a balanced chemical equation.
Differentiate between in Chemical reaction and chemical equation.
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
A chemical equation is a statement that describes a chemical change in terms of
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)
Chlorine (Cl2) molecule is formed by ______ of electrons between two chlorine atoms.
Give an example of the following chemical change.
Two gases combine to form white solid
Give an example of a photochemical reaction.
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
Name: Gas with rotten egg smell.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
Give a balanced equation for the conversion of an ammonium salt to a basic gas.
Mention the various conditions required for a chemical reaction to occur.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Can you change rust back into iron by some simple method?
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
Chemical changes are important in our day-to-day life. Give examples.
Photosynthesis is a chemical charge. Justify your answer.
