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प्रश्न
Write true or false :
Hydrogen sulphide has rotten egg smell .
पर्याय
True
False
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उत्तर
True
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
Give reason .
A person suffering from acidity is advised to take an antacid.
TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
What do you observe when :
an iron nail is kept in tap water for few days
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.
Define an electrochemical reaction.
Complete and balance the following reaction:
NaCl(aq) + AgNO3(aq) →
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
Explain the term chemical reaction with special reference to reactants and products.
Chemical change is a temporary change.
State whether the following statement is true or false:
When a candle burns, both physical and chemical changes take place.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think formation of rust from iron is a chemical change?
The chemical formula of rust is ______.
Is the conversion of milk into ice cream a chemical change?
Write the chemical reaction of baking soda with lemon.
Write a note on the following:
Curdling of milk
