The layer of the eyeball that forms the transparent Cornea

November 30, 2021

The layer of the eyeball that forms the transparent Cornea

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The number of chromosomes present in a nerve cell of a human being

November 29, 2021

The number of chromosomes present in a nerve cell of a human being.

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The blood vessel which supplies blood to the liver

November 29, 2021

The blood vessel which supplies blood to the liver.

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The organization which procures and supplies blood during an emergency

November 28, 2021

The organization which procures and supplies blood during an emergency

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Which property of sulphuric acid is shown by the reaction of concentrated sulphuric acid with

November 27, 2021

Which property of sulphuric acid is shown by the reaction of concentrated sulphuric acid with:

  1. Ethanol?
  2. Carbon?

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State why for the preparation of Nitric acid, the complete apparatus is made up of glass.

November 26, 2021

State why for the preparation of Nitric acid, the complete apparatus is made up of glass.

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What is the type of salt formed when the reactants are heated at a suitable temperature for the preparation of Nitric acid

November 25, 2021

What is the type of salt formed when the reactants are heated at a suitable temperature for the preparation of Nitric acid?

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Write a balanced equation for the preparation of each of the following salts

November 24, 2021

Write a balanced equation for the preparation of each of the following salts:

  1. Copper sulphate from Copper carbonate.
  2. Zinc carbonate from Zinc sulphate.

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Give a chemical test to distinguish between the following pairs of chemicals

November 23, 2021

Give a chemical test to distinguish between the following pairs of chemicals:

  1. Lead nitrate solution and Zinc nitrate solution
  2. Sodium chloride solution and Sodium nitrate solution

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Three solutions P, Q and R have pH value of 3.5, 5.2 and 12.2 respectively. Which one of these is a

November 22, 2021

Three solutions P, Q and R have pH value of 3.5, 5.2 and 12.2 respectively. Which one of these is a:

  1. Weak acid?
  2. Strong alkali?

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Ethane burns in oxygen to form CO2 and H2O according to the equation

November 21, 2021

Ethane burns in oxygen to form CO2 and H2O according to the equation:

2C2H6 + 7O2 → 4CO2 + 6H2O.

If 1250 cc of oxygen is burnt with 300 cc of ethane.

Calculate:

  1. the volume of CO2 formed.
  2. the volume of unused O2.

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A compound X (having vinegar like smell) when treated with ethanol in the presence of the acid Z, gives a compound Y which has a fruity smell.

November 20, 2021

A compound X (having vinegar like smell) when treated with ethanol in the presence of the acid Z, gives a compound Y which has a fruity smell.

The reaction is:

  1. Identify Y and Z.
  2. Write the structural formula of X.
  3. Name the above reaction.

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