एल्युमिनियम धातु को प्राप्त किया जाता है—
Aluminium metal is obtained from:
Comprehensive collection of questions from General Science asked in recent state service examinations. Each question is verified with official answer keys and step-by-step bilingual solutions.
Aluminium metal is obtained from:
Which of the following is the correct descending order of the densities of the given substances?
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:
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.
Iron is extracted from:
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:
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:
Which one of the following statements is correct?
Which of the following is lighter than water?
Bauxite is an ore of:
Which of the following is the heaviest metal?
Which of the following elements is kept preserved in kerosene oil?
Which one of the following pairs of metals contains the lightest and heaviest metal respectively?
Pearl is mainly composed of-
Sodium vapour lamps are commonly used as street lights because-
How are ruby and sapphire chemically known?
Which of the following metals is found in free (native) state?
The heaviest naturally occurring element is-
Which one of the following materials is very hard and very ductile?
Assertion (A): Sodium metal is stored in kerosene. Reason (R): Sodium metal melts when exposed to air. Code:
The extremely soft mineral, Talc (soapstone), is mainly-
Which of the following substances is naturally the hardest substance found on Earth?
The main constituents of pearl are-