Chemistry - MOST IMPORTANT Executive Electrical Previous Year Questions
Practice real questions from previous year exams of Executive Electrical.
Which of the following compounds is a base?
Read the given statements carefully and select the correct option.
Statement-I: The clusters of molecules in which the hydrophobic tails are in the interior of the cluster and the ionic ends are on the surface of the cluster are called micelles.
Statement-II: The micelles stay in solution as a colloid and will not come together to precipitate because of ion-ion repulsion.
In the decomposition of lead nitrate (Pb(NO3)2), which of the following pairs of gases is released?
When 50 g of silver nitrate solution is mixed with 30 g of sodium chloride solution, a white precipitate of silver chloride forms along with sodium nitrate in the solution. What will the total mass of the products be?
When a metal carbonate reacts with an acid what are the products formed?
Ozone, which forms the protective layer around the surface of the earth, is made up of ______ atom(s) of oxygen.
Which of the following chemicals can be obtained from sodium chloride?
I. Baking soda
II. Washing soda
Which of the following statements is/are correct regarding the Modern Periodic Table?
I. Properties of elements are a periodic function of their atomic mass.
II. The Modern Periodic Table has 18 vertical columns known as 'groups' and 7 horizontal rows known as 'periods'.
The 'Law of Octaves' was proposed by____.
____ is an essential element used in the synthesis of proteins.
Burning of coal is an example of ____ reaction.
Which of the following statements is/are correct regarding fossil fuels?
I. The fossil fuels are renewable sources of energy.
II. Burning fossil fuels leads to acid rain.
Assertion (A): Sodium chloride absorbs moisture from the atmosphere when it is kept open.
Reason (R): Sodium chloride hygroscopic nature, forms a brine solution by absorbing water molecules.