CMAT Chemistry Questions

Given below are 4 statements (A), (B), (C) and (D). Please read them carefully and respond to the question given after these statements.
(A) The crust of the Earth comprises rocks rich in silica and aluminium.
(B) The core of the earth consists of metals in liquid stat e of high temperature and pressure.
(C) Magnesium and Phosphorus are dominant in the core of the Earth.
(D) The Hydrosphere covers approximately 71 % of the total surface area of the Earth.
Choose the correct answer from the options given below : 

Which of the following copper alloys is used for the manufacture of springs and suspension filaments in electrical instruments?

Which of the following is true?

Which of the following gas/es is/are used to disinfect water in sewage treatment facilities?

After discovery of which of the following methods the date of the Harappan Civilization (2300-1750 BC) has been fixed?

The Taj Mahal is threatened due to:-