लोहा जिससे प्राप्त किया जाता है, वह है—
Iron is extracted from:
Collection of verified questions for Dhatuyen Khanij Ayask under General Science. Includes previous year exam questions with official answer keys and step-by-step solutions.
Iron is extracted from:
Magnetite particles, suspected to cause neurodegenerative problems, are generated as environmental pollutants from which of the following? 1. Brakes of motor vehicles 2. Engines of motor vehicles 3. Microwave stoves used in homes 4. Power plants 5. Telephone lines Select the correct answer using the code given below.
Which of the following is the correct descending order of the densities of the given substances?
Which one of the following statements is correct?
Which primary mineral is used to manufacture aluminium?
Match List-1 (Industrial Process) with List-2 (Associated Industry) and select the correct answer using the code given below the lists: List-1 (Industrial Process) List-2 (Industry) (A) Cracking 1. Rubber (B) Smelting 2. Petroleum (C) Hydrogenation 4. Edible fats (D) Vulcanization 3. Copper Code:
Match List-1 (Naturally occurring substance) with List-2 (Element) and select the correct answer using the code given below the lists: List-1 (Natural Substance) List-2 (Element) (A) Diamond 1. Calcium (B) Marble 2. Silicon (C) Sand 3. Aluminium (D) Ruby 4. Carbon Code:
Aluminium metal is obtained from:
Bauxite is an ore for obtaining which of the following metals?
Match List-I with List-II and select the correct answer using the code given below the lists: List-I List-II A. Best conductor of heat and electricity 1. Gold B. Most abundant metal in earth's crust 2. Aluminium C. Most malleable and ductile metal 3. Lead D. Poorest conductor of heat 4. Silver Code:
Which of the following is lighter than water?
Which of the following does not react with water at all?
Bauxite is an ore of:
Match List-I with List-II and select the correct answer using the code given below the lists: List - I (Metal) List - II (Property) A. Sodium 1. Good conductor of electricity B. Mercury 2. Liquid at room temperature C. Silver 3. Bad conductor of heat D. Lead 4. Can be easily cut with a knife Code:
Which of the following industries uses bauxite as its main raw material?
Which of the following has the highest melting point?
Which of the following pairs is not correctly matched?
Why is there a great concern about copper smelting plants? 1. They may release lethal quantities of carbon monoxide into the environment. 2. The copper slag can cause the leaching of some heavy metals into the environment. 3. They may release sulphur dioxide as a pollutant. Select the correct answer using the code given below.
Which of the following iron ores is mined in Bailadila?
Which of the following substances has the highest electrical conductivity?
No reaction takes place when steam is passed over:
The chemical composition of a pearl is-
The heaviest naturally occurring element is-
The chemical formula of sapphire / ruby is -
Which is the most reactive metal?