Question : Sapphire and Ruby are varieties of natural:
Option 1: Aluminium sulphide
Option 2: Aluminium hydroxide
Option 3: Aluminium carbonate
Option 4: Aluminium oxide
Correct Answer: Aluminium oxide
Solution : The correct answer is Aluminium oxide .
Sapphire and Ruby are varieties of natural Aluminium oxide. Sapphires and Rubies are both the gem varieties of mineral corundum. Both have the same chemical composition and structure, and they get their colour because of certain impurities contained in the mineral. Sapphire and Ruby are one of the hardest minerals after Diamond.
Result | Eligibility | Application | Selection Process | Cutoff | Admit Card | Preparation Tips
Question : Aluminium salt commonly used to stop bleeding is:
Question : Which of the following pair of compound name – formulas is correct? I. Calcium oxide – CaO II. Aluminium oxide – Al2O3
Question : Dry powder fire extinguishers contain:
Question : Nitrogen in water is commonly found in the form of:
Question : The hardness of the water is commonly measured in terms of:
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile