461. Who discovered benzene?

1. Hal Anger
2. Michael Faraday
3. Bruce Ames
4. Nicolas Appert

Option “2” is correct.
Benzene was first discovered by the English scientist Michael Faraday in 1825.
462. First country to impose carbon tax is ________.

1. Australia
2. Iceland
3. USA
4. New Zealand

Option “4” is correct.
New Zealand is first country to impose carbon tax.
463. Which drug is used as an Anti-Inflammatory?

1. Metformin
2. Diazepam
3. Latanoprost
4. Prednisone

Option “4” is correct.
Prednisone drug is used as an Anti-Inflammatory drug. It is used to treat a number of different conditions, such as inflammation (swelling), severe allergies, adrenal problems, arthritis, asthma, blood or bone marrow problems, endocrine problems, eye or vision problems, stomach or bowel problems, lupus, skin conditions, kidney problems, ulcerative colitis, and flare-ups of multiple sclerosis.
464. Brownish film formed on iron when left in open is called?

1. Dust
2. Shovel
3. Spade
4. Rust

Option “4” is correct.
When iron is exposed to water or air over a period of time, the iron reacts with oxygen in the presence of moisture to form a reddish-brown chemical compound, iron oxide. This is referred to as rust.
465. The substances which have very low ignition temperature and can easily catch fire with a flame are called _____________ substances.

1. Hazardous
2. Perilous
3. Incombustible
4. Inflammable

Option “4” is correct.
The substances which have very low ignition temperature and can easily catch fire with a flame are called inflammable substances. Examples of inflammable substances are petrol, alcohol, Liquified Petroleum Gas (LPG), etc.
466. Which of the following is used as non-stick coating for cooking utensils?

1. Perspex
2. Styrofoam
3. Polystyrene
4. Teflon

Option “4” is correct.
Non-stick cookware is a common application, where the non-stick coating allows food to brown without sticking to the pan. Non-stick is often used to refer to surfaces coated with “Teflon.”
467. Particulates (< 1 μm size) remaining suspended in air indefinitely and transported by wind currents are called-

1. Mists
2. Fumes
3. Aerosols
4. Smoke

Option “3” is correct.
Aerosol is a system of solid or liquid particles suspended by a mixture of gases. The term aerosols covers a wide spectrum of small particles, like sea salt particles, mineral dust, pollen, drops of sulphuric acid and many others.
468. A substance which readily forms colloidal solution in contact with water is called –

1. Extrinsic colloid
2. Associated colloid
3. Hydrophobic colloid
4. Hydrophilic colloid

Option “4” is correct.
The meaning of the word hydrophilic is water loving. Thus, a substance which readily forms colloidal solution in contact with water is called hydrophilic colloid.
469. Radioactive disintegration of uranium ultimately results in formation of –

1. Radium
2. Thorium
3. Polonium
4. Lead

Option “4” is correct.
Radioactive disintegration of uranium ultimately results in the formation of lead.
470. Which one of the following pairs is correctly matched?

1. Silver Iodide – Horn Silver
2. Silver Chloride – Artificial rain
3. Zinc Phosphide – Rat poison
4. Zinc Sulphide – Philosopher’s wool

Option “3” is correct.
Pairs is correctly matched as such-
Silver Iodide – Artificial rain, Silver Chloride – Horn Silver, Zinc Phosphide – Rat poison, Zinc Oxide – Philosopher’s wool.
Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

166 thoughts on “Chemistry”

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    I Love chemical…it’s my favourite subject..mere iss mein se hmesha hi boht ache marks aate hai….and my interest is also in chemistry…

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  144. gloriaabelardo

    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.

  145. murieldjayne

    Everything about the new GRNR for lack of a consensus nickname link yet is basically like every other 126710. The stainless steel case is 40mm by 12mm and the watch comes with choice of Jubilee or Oyster bracelet. The watch is powered by a caliber 3285 with 70 hours of power reserve and has the independent jumping hour hand to skip time zones when you travel from place to place.

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  148. ubetoraizelb

    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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