241. Which acid is found in Vinegar?

1. Lactic Acid
2. Citric Acid
3. Malic Acid
4. Acetic Acid

Option “D” is correct
Acetic acid is the chief component of vinegar. Vinegar is liquid consisting mainly of acetic acid (CH3COOH) and water.
242. Which one of the following gases, released from biogas plant is used as a fuel gas?

1. Butane
2. Propane
3. Methane
4. Ethane

Option “C” is correct
Methane is the principal gas in biogas. It is also the main component of natural gas, a fossil fuel, can be used to replace natural gas in many applications including cooking, heating, steam production, etc.
243. Baking soda is-

1. Sodium Chloride
2. Sodium Bicarbonate
3. Baking Soda
4. Sodium Hydroxide

Option “B” is correct
Sodium bicarbonate is also known as Baking Soda. The chemical formula of Sodium Bicarbonate is NaHCO3.
244. Which among the following is false about acids?

1. They give H+ ions in aqueous solution
2. Most acids contain hydrogen
3. They turn blue litmus red
4. They are bad conductor of electricity in aqueous solution

Option “D” is correct
Acids are not bad conductor of electricity in aqueous solution.
245. The Chemical formula of Cadmium nitrate is _____.

1. Cd(NO3)2
2. CdNO3
3. Cd2(NO3)2
4. Cd2NO3

Option “A” is correct
The Chemical formula of Cadmium Nitrate is Cd(NO3)2.
246. The Chemical formula of Cadmium nitrate is _____.Which glass is used to make sunglasses?

1. Crook’s glass
2. Potash glass
3. Jena glass
4. Soda glass

Option “A” is correct
Crook Glass is a type of glass that contains cerium and other rare earths and has a high absorption of ultraviolet radiation; used in sunglasses.
247. Beryllium loses ____ electrons to achieve noble gas electron configuration.

1. 1
2. 2
3. 3
4. 4

Option “B” is correct
Beryllium has atomic number 4. Beryllium loses 2 electrons to achieve noble gas electron configuration.
248. Which base is present in milk of magnesia?

1. Magnesium hydroxide
2. Ammonium hydroxide
3. Sodium hydroxide
4. Calcium hydroxide

Option “A” is correct
Milk of magnesia is the suspension of base Magnesium hydroxide Mg(OH)2 in water.
249. Which of the following is an ore of iron?

1. Dolomite
2. Epsom Salt
3. Siderite
4. Galena

Option “C” is correct
Dolomite is an ore of Magnesium; Epsom salt is an ore of Magnesium and sulphur; Galena is an ore of lead and Siderite is an ore of iron.
250. CNG is-

1. Compressed Natural Gas
2. Cyanogen Natural Gas
3. Condensed Nitrogen Gas
4. Controlled Natural Gas

Option “A” is correct
C.N.G. is the short form of compressed Natural Gas.
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166 thoughts on “Chemistry”

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    Personally I don’t think the criticism really sticks these days. In watchmaking as in everything else people copy you can say “are link influenced by” if you want some people do and hell if we had an Infinity Gauntlet and did a Snap on every watch that is obviously influenced by the Royal Oak we’d have a lot of dust in the air.

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    Skull form watches have never really made a third comeback partly because they’re impractical to carry and partly because pocket watches these days are a niche of link a niche the annual production of pocket watches from high-end makers like Patek AP and Vacheron is a drop in the ocean of wristwatches that come out of Switzerland every year. However watches with skulls on the dial or otherwise incorporated into the design of a watch are in the catalogue of several brands.

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