Description : Which variety of glass is heat resistant? A. Bottle glass B. Flint glass C. Hard glass D. Pyrex glass (Answer)
Last Answer : D. Pyrex glass (Answer)
Description : Heat resistant variety of glass is— (1) Pyrex glass (2) Hard glass (3) Flint glass (4) None of these
Last Answer : Flint glass
Description : Commonly used glass is known as the __________ glass. (A) Flint (B) Hard (C) Pyrex (D) Soda
Last Answer : (D) Soda
Description : Lens is made up of – (1) Pyrex glass (2) Flint glass (3) Ordinary glass (4) Cobalt glass
Last Answer : (2) Flint glass Explanation: Flint glass is optical glass that has relatively high refractive index and low Abbe number (high dispersion). A concave lens of flint glass is commonly ... doublet lens because of their compensating optical properties, which reduces chromatic aberration (colour defects).
Description : Which one of the following is used for sun glasses? (1) Pyrex glass (2) Flint glass (3) Crooks glass (4) Crystal glass
Last Answer : (3) Crooks glass Explanation: A type of glass that contains cerium and other rare earths and has a high absorption of ultraviolet radiation is used in sunglasses. Sunglasses or sun glasses ... as variously termed spectacles or glasses exist, featuring lenses that are coloured, polarized or darkened.
Description : Lens is made up of (1) Pyrex glass(2) Flint glass (3) Ordinary glass (4) Cobalt glass
Description : Which one of the following is used for sun glasses ? (1) Pyrex glass (2) Flint glass (3) Crooks glass (4) Crystal glass
Last Answer : Crooks glass
Description : Which type of glass is used for making glass reinforced plastic? (1) Pyrex glass (2) Flint glass (3) Quartz glass (4) Fibre glass
Last Answer : (4) Fibre glass Explanation: Fiberglass is a lightweight, extremely strong, and robust material. Although strength properties are somewhat lower than carbon fiber and it is less stiff, the material ... also very favorable when compared to metals, and it can be easily formed using molding processes.
Description : Electric bulbs are made of __________ glass. (A) Jena (B) Flint (C) Crookes (D) Pyrex
Last Answer : (B) Flint
Description : Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance. (A) Flint (B) Soda (C) Pyrex (D) Potash
Last Answer : (C) Pyrex
Description : The type of high refractive index glass used in optical instruments is __________ glass. (A) Pyrex (B) Flint (C) Crookes (D) None of these
Description : Basic oxide is absent in __________ glass. (A) Flint (B) Pyrex (C) Quartz (D) All (A), (B) & (C)
Last Answer : (C) Quartz
Description : __________ glass is used for the manufacture of optical glass. (A) Pyrex (B) Soda (C) Flint (D) Crooke's
Last Answer : (C) Flint
Last Answer : Fibre glass
Description : __________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. (A) Pyrex (B) Soda lime (C) Lead (D) High silica
Last Answer : (A) Pyrex
Description : Which variety of glass is heat resistant? -Do You Know?
Last Answer : answer:
Description : Which variety of glass is heat resistant?
Last Answer : Pyrex glass
Description : Which one of the following types of glass can cut off ultraviolet rays? (1) Soda glass (2) Pyrex glass (3) Jena glass (4) Crookes glass
Last Answer : (4) Crookes glass Explanation: In this glass mainly cerium oxide (CiO2) is present which sharply absorbs the ultraviolet rays from the sunlight so utilized in making lenses of eye glasses.
Description : Is pyrex just tempered glass, or is there anything else in it?
Last Answer : The heat resistant quality
Description : Which of the following is responsible for the extra strength of pyrex glass? (1) Potassium Carbonate (2) Lead Oxide (3) Borax (4) Ferric Oxide
Last Answer : (3) Borax Explanation: Older clear-glass Pyrex manufactured by Corning before 1998, Arc International's Pyrex products, and Pyrex laboratory glassware is made of borosilicate glass. According ... glass cookware manufactured by World Kitchen is made of tempered sodalime glass instead of borosilicate.
Description : Which of the following is responsible for extra strength of Pyrex glass?
Last Answer : Borax
Description : The glass known as Pyrex?
Last Answer : Borosilicate glass
Description : Centrifugal pump made of pyrex or glass can't be used to pump (A) Milk and fruit juices (B) Alkaline solutions (C) Dilute H2SO4 at room temperature (D) Brine
Last Answer : (B) Alkaline solutions
Description : Sudden temperature fluctuation does not affect pyrex glass, because of its (A) Low co-efficient of expansion (B) High co-efficient of expansion (C) High melting point (D) Both (B) and (C)
Last Answer : (A) Low co-efficient of expansion
Description : The main component of Pyrex glass is (A) Zinc (B) Lead (C) Boron (D) Selenium
Last Answer : (B) Lead
Description : Which of the following is responsible for the extra strength of pyrex glass ? (1) Potassium Carbonate (2) Lead Oxide (3) Borax (4) Ferric Oxide
Description : The refractive indices for lights of violet, yellow and red colours for a flint glass prism are respectively 1.632, 1.620 and 1.613. Find the dispersi
Last Answer : The refractive indices for lights of violet, yellow and red colours for a flint glass prism are ... Find the dispersive power of the prism material.
Description : Why addition of flint and quartz to molten glass does not shrink or get transformed?
Last Answer : Flint and quartz are forms of silica, they do not absorb water. As water is not absorbed, they do not get transformed on heating and do not shrink.
Description : Major component of flint glass is (A) Lead oxide (B) Silica (C) Alumina (D) Soda
Last Answer : (A) Lead oxide
Description : Flint glass (A) Has slightly the greater refracting power than crown glass (B) Has roughly double refracting power than that of crown (C) And crown glass proportions yield the required focal length ... dispersion produced by the convex lens at the emergence from the concave (D) All the above
Last Answer : (D) All the above
Description : A pyrex tumbler does not crack when hot water is poured into it because pyrex (a) is a strong material (b) does not expand much on heating (c) is a good conductor of heat (d) expands equally from inside and outside
Last Answer : Ans:(b)
Description : Which of the following is resistant to the action of both heat & chemicals? (A) Borosilicate glass (B) Silica glass (C) Soda lime glass (D) None of these
Last Answer : (A) Borosilicate glass
Description : Yellow vein mosaic resistant variety of okra
Last Answer : Ans. Pusa Sawani
Description : Phomopsis blight and Bacterial blight resistant variety of brinjal
Last Answer : Ans. Pant Samrat
Description : Nematode and Bacterial wilt resistant variety of tomato
Last Answer : Ans. Arka vardan
Description : Sterility mosaic and wilt resistant variety of pigeonpea
Last Answer : Ans.Amar, Narendra Arhar 1, Azad
Description : Most suitable variety of chickpea to drought resistant?
Last Answer : Ans.NP-58
Description : Chickpea variety resistant to Wilt?
Last Answer : Ans.JG-74, JG-315, BG-256, Awarodhi
Description : Molya disease resistant variety of barley is
Last Answer : Ans.RD 2052
Description : An improved variety of transgenic basmati rice (a) does not require chemical fertilizers and growth hormones (b) gives high yield and is rich in vitamin A (c) is completely resistant to all insect pests and diseases of paddy (d) gives high yield but has no characteristic aroma.
Last Answer : (b) gives high yield and is rich in vitamin A
Description : Which of the following is true for Golden rice? (a) It has yellow grains, because of a gene introduced from a primitive variety of rice. (b) It is vitamin A enriched, with a gene ... , with a gene from Bacillus thuringiensis. (d) It is drought tolerant, developed using Agrobacterium vector.
Last Answer : (b) It is vitamin A enriched, with a gene from daffodil.
Description : Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to (a) insect pests (b) fungal diseases (c) plant nematodes (d) insect predators.
Last Answer : (a) insect pests
Description : A plant breeder: waists to develop a disease resistant variety. What should he do first?(a) Hybridisation (b) Mutation (c) Selection (d) Production of crop
Last Answer : (c) Selection
Description : Cultivation of resistant variety is —- method of pest control. a. Physical b. Chemical c. Biological d. Cultural
Last Answer : d. Cultural
Description : Which of the following is Indian Council of Agriculture Research’s (ICAR’s) first-ever water submergence resistant rice variety? a. Sahbhagi Dhan b. Suvarna Sub – 1 c. Pusa Basmati -1 d. Ganga (101)
Last Answer : b. Suvarna Sub – 1
Description : . Classic example for success of breeding herbicide resistant variety is a). Canola-rape variety resistant to triazine 22 b). Secale cereal resistant to paraquat c). Tracy-M soybean variety resistant to metribuzin d). All of these
Last Answer : d). All of these
Description : 29. The disease resistant variety of Brassica resistant to “white rust” is ... b) Pusa Swarnim b) Pusa Komal c) Pusa Sadabahar d) Pusa Shubhra
Last Answer : b) Pusa Swarnim
Description : 9. The disease resistant variety of Brassica resistant to “white rust” is ... a) Pusa Swarnim b) Pusa Komal c) Pusa Sadabahar d) Pusa Shubhra
Last Answer : a) Pusa Swarnim
Description : 1. Biofortification is a method of breeding crops for a) Increasing the amount of production b) To produce disease resistant variety c) To improve the nutritional quality d) To produce high amount of vitamin
Last Answer : c) To improve the nutritional quality
Description : A plant breeder: waists to develop a disease resistant variety. What should he do first? a) Hybridisation b) Mutation c) Selection d) Production of crop
Last Answer : c) Selection