Advertisements
Advertisements
Question
NPK are the primary nutrients for plants.
Options
True
False
Advertisements
Solution
NPK are the primary nutrients for plants- True.
APPEARS IN
RELATED QUESTIONS
What are chemical reactions?
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
Write true or false :
Hydrogen sulphide has rotten egg smell .
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
State what you would observe when the following substance is heated in a glass test tube red lead.
What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
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)
The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
What is a chemical change? Give two examples of chemical change?
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
State the original colour of the following substance and colour of residue obtained after heating.
Ammonium dichromate
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium chloride
Distinguish by dilute sulphuric acid.
Copper and magnesium?
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Ammonium dichromate.
True or False. If false, give the correct answer.
Taking a glass of water and freezing it by placing it in the freezer is a chemical change.
Limestone contains ______ mainly.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Are these changes chemical in nature?
