Welcome to Online General Knowledge section in Affairs cloud, which is important for all the competitive exams. We have created Some questions related to General Science(Chemistry) !!!
- The Wire of Flash bulb is made of ………………..
5.None of theseAnswer – 2.Magnesium
In 1893, Chauffour made an ancestor of the flash bulb; this had magnesium
- One Carat of diamond is equal to ……………………
5.None of theseAnswer – 1.200m
One carat is equal to 0.2 grams
- Wood Spirit is which of the following ?
5.None of theseAnswer – 3.Methyl Alcohol
Wood spirit is a poisonous colorless liquid used as a solvent and fuel; ingestion may cause blindness or death. Called also methyl or wood alcohol.
- Which of the following is chief source of Napthalene ?
5.None of theseAnswer –
Naphthalene is an organic compound with formula C 10H 8. It is the simplest polycyclic. Naphthalene is the most abundant single component of coal tar.
- Fire fighting clothes are made of ………………….
5.None of theseAnswer – 1.Asbestos
A fire proximity suit is a suit designed to protect a firefighter from high temperatures, especially near fires of extreme temperature such as aircraft fires. Fire proximity suitsfirst appeared during the 1930s, and were originally made of asbestos
- If lime water is kept in air, it turns milky due to the presence of
2.Carbon di oxide
5.None of theseAnswer – 2.Carbon di oxide
Carbon dioxide passed into limewater gives a milky solution. This isdue to the insoluble suspension of calcium carbonate formed
- ……………….. type of fire extinguisher is used for petroleum fire
5.None of theseAnswer – 4.Foam
Petrolium products are oil & lubricants, we will use foam extiguiser, as it will make a foam cover over the oil and hence cut off the oxygen supply.
- Which of the following can form compounds ?
5.None of theseAnswer – 3.Xenon
Xenon, with a larger atomic mass, is able to form compounds (with fluorine, for example, to form XeF6).
- Maximum permissible concentration of copper in drinking water is
5.None of theseAnswer – 1.1 mg/L
The aesthetic objective (AO) for copper in drinking water is 1.0 mg/L
- Au dissolves in …………….
5.None of theseAnswer – 4.Aqua regia
Aqua regia dissolves gold, though neither constituent acid will do so alone, because, in combination, each acid performs a different task. Nitric acid is a powerful oxidizer, which will actually dissolve a virtually undetectable amount of gold, forming gold ions