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.
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 –
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?
Q. 1. Ribosomes are made up of..
1. Protein and RNA
2. Protein and DNA
3. Carbohydrates
4. Cellulose
Q. 2. Electron transport chain occur at …
1. Protein fibre
2. Cellulose
3. mitochondrial inner membrane
4. Callose
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Which instrument is used to capture the purity of milk?
(A) hydrometer
(B). Isometric
(C). Lacto meter
Lactometer
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…
Protein and RNA
Protein and RNA
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