Which of the following statements about magnetite ore of iron is/are correct?
1. It is known as black ore.
2. It contains 60% to 70% of pure iron.
3. It possesses magnetic properties.
Select the correct answer using the codes given below:
Important Questions on Chemistry
Which of the following non-metal conducts electricity?
(A) Lead
(B) Wood charcoal
(C) Coal
(D) Diamond
Which of the given below atomic numbers of elements resembles the chemical properties of Magnesium?
How many moles of sulphuric acid are present in 25 gm?
Which of the following is known as the 'King of Chemicals'?
Catalyst is a substance that_____:
The hormone produced in plants due to which the stem bends towards sunlight is _____:
I. Carbon compounds linked by the only single bond are called saturated compounds.
II. Carbon Compounds having double or triple bonds are called unsaturated compounds.
III. Saturated carbon compounds are more reactive than unsaturated carbon compounds.
Which of the following is not a bleaching agent?
1. Sodium hypochlorite
2. Calcium hypochlorite
3. Hydrogen peroxide
4. Hydrogen sulphide
