What is meant by the concentration of a solution? Explain by giving an example.
The concentration of a solution Is the amount of solute present in a given amount of solution or solvent.
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What is the valency of Ca in the compound Cao
The valency of Ca in the compound CaO is 2.
How many d electrons are present in Cr+2 ion?
The d orbital Cr+2 ion contains 4 electrons.
Oxidation is a process which involves
Oxidation is a process that involves: a) addition of oxygen b) removal of oxygen c) addition of hydrogen d) removal... View Article
What happens when copper nitrate undergoes heating?
When copper nitrate or Cu(NO3)2 undergoes heating, a metal oxide, nitrite and oxygen will be the results. 2Cu(NO3)2 → 2CuO... View Article
Give two uses of quick lime.
Uses of quick lime are:It is used in the manufacturing of cement, paper, and high-grade steel.It is the cheapest alkali... View Article
Name the chemical formula of sodium amalgam.
The chemical formula of Sodium amalgam is Na(Hg). It is an alloy of mercury and sodium.
Write chemical equation to represent the action of dilute hydrochloric acid on bleaching powder.
Bleaching Powder is Calcium Oxychloride and its chemical formula is CaOCl2. The chemical equation to represent the action of dilute... View Article
Which one of the following is a metal?
(A) Carbon (B) Nitrogen (C) Sodium (D) OxygenCorrect option: (C) Sodium.Among the given options, Sodium(Na) is a metal.
Consider the following statements: (a) Both acids and bases change colour of all indicators. (b) If an indicator gives a colour change with an acid, it does not give a change with a base. (c) If an indicator changes colour with a base, it does not change colour with an acid. (d) Change of colour in an acid and a base depends on the type of the indicator. Which of these statements are correct? (i) All four (ii) a and d (iii) b, c and d (iv) only d
Answer: (iv) Only (d) is correct The change of colour in acid and base depends on the type of indicator. A... View Article
Differences between Atomic Orbital and Molecular Orbital.
Atomic Orbital Molecular Orbital – It is the region having the highest probability of finding an electron in an atom... View Article
Draw a neat labelled diagram of electrolysis of water.
Here’s a neat labelled diagram to show the electrolysis of water.
The drain cleaner drainex contains small bits of aluminum which react with caustic soda to
The drain cleaner drainex contains small bits of aluminium which react with caustic soda to produce hydrogen.
Name the methods of food protection.
The most commonly followed food protection methods are chemical method, sugar, heat and cold methods, smoking, canning, sterilization, dehydration, lyophilization,... View Article
Define girth of the stem.
The thickness or width of the stem is called the girth of the stem. Also, the girth of the stem... View Article
What is lymph? Write its function.
The fluid present in the lymphatic system is called lymph. Lymph is a colourless fluid containing specialised lymphocytes which are... View Article
Natural system of classification is given by
(a) Carolus Linnaeus(b) George Bentham and Joseph Dalton Hooker(c) Hutchinson(d) Ernest HaeckelCorrect option: (b) George Bentham and Joseph Dalton HookerNatural... View Article
Give an example of threshing.
Threshing is the process that is used to separate the grain from stalks etc. In this process, the stalks are... View Article
Example of complex tissue.
Xylem and phloem are the examples of complex tissues. These are heterogenous in nature.
Name the stored food of animal.
The stored food of animal is called Glycogen. That means, in animals, the stored food reserve is in the form... View Article
