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प्रश्न
NPK are the primary nutrients for plants.
विकल्प
True
False
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उत्तर
NPK are the primary nutrients for plants- True.
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संबंधित प्रश्न
Define catalyst.
Complete and balance the following chemical equations:
N2 + O2 →
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
What do you observe when iron nail is kept in copper sulphate solution for sometime.
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In a ............ change, new substances are formed.
FILL IN THE BLANK
Positively charged ions are called ........
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
Select the correct answer for the following options:
The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc carbonate to zinc oxide
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
A chemical reaction is often accompanied by external indications or characteristics.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Copper nitrate.
Analogy:
H2O: Water:: NaCl: ______.
What is the use of indicator?
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
A chemical change may involve –
Beating an egg to make a cake is a ______.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
