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प्रश्न
Write true or false :
Hydrogen sulphide has rotten egg smell .
विकल्प
True
False
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उत्तर
True
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations
Na + H2 O →
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
FILL IN THE BLANK
........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.
TRUE \ FALSE
Positively charged electrode is called the anode. True or false ?
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
Explain the following reaction with one suitable example of Displacement reaction.
A solution of a substance ‘X’ is used for white washing Name the substance ‘X’ and write its formula.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Sodium chloride
When electric current is passed through acidulated water ______ of water takes place.
Explain,giving one example of the following chemical changes:
Reversible reaction
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
What do you observe when CO2 is passed through lime water first and then a little in excess.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc carbonate to zinc oxide
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
When an aqueous solution of potassium chloride is added to an aqueous solution of silver nitrate, a white precipitate is formed. Give the chemical equation of this reaction.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
Galvanization is a process in which ______ is coated as a layer of iron.
