Hello Aspirants.
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 ………………..
1.Aluminium
2.Magnesium
3.Sodium
4.Nickel
5.None of theseAnswer – 2.Magnesium
Explanation :
In 1893, Chauffour made an ancestor of the flash bulb; this had magnesium - One Carat of diamond is equal to ……………………
1.200m
2.100m
3.150m
4.300m
5.None of theseAnswer – 1.200m
Explanation :
One carat is equal to 0.2 grams - Wood Spirit is which of the following ?
1.Ethyl Alcohol
2.Propanol
3.Methyl Alcohol
4.Butanol
5.None of theseAnswer – 3.Methyl Alcohol
Explanation :
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 ?
1.Moth balls
2.Mothflakes
3.Tar Camphor
4.Coal tar
5.None of theseAnswer –
4.Coal tar
Explanation :
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 ………………….
1.Asbestos
2.Amosite
3.Chrysotile
4.Actinolite
5.None of theseAnswer – 1.Asbestos
Explanation :
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 Fire proximity suitsfirst appeared during the 1930s, and were originally made of asbestos - If lime water is kept in air, it turns milky due to the presence of
1.Magnesium Oxide
2.Carbon di oxide
3.Calcium Oxide
4.Carbon monoxide
5.None of theseAnswer – 2.Carbon di oxide
Explanation :
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
1.Wet Chemical
2.Dry Powder
3.Water
4.Foam
5.None of theseAnswer – 4.Foam
Explanation :
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 ?
1.Helium
2.Neon
3.Xenon
4.Radon
5.None of theseAnswer – 3.Xenon
Explanation :
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
1.1 mg/L
2.0.5 mg/L
3.2 mg/L
4.0.2 mg/L
5.None of theseAnswer – 1.1 mg/L
Explanation :
The aesthetic objective (AO) for copper in drinking water is 1.0 mg/L - Au dissolves in …………….
1.Solution
2.Acids
3.Water
4.Aqua regia
5.None of theseAnswer – 4.Aqua regia
Explanation :
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
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