Description : Name the two allotropic forms of silicon.
Last Answer : a) Amorphous silicon b) Crystalline silicon
Description : 30%Diamond is an allotropic form of----? Carbon Hydrogen Nitrogen Silicon
Last Answer : Silicon
Description : Name the allotropic forms of carbon
Last Answer : Crystalline carbon – Diamond & graphite Amorphous carbon
Description : Pick out the wrong statement. (A) Tin can be readily and very easily drawn into very fine wire (B) Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature (C) Tin exists in two allotropic forms
Last Answer : (A) Tin can be readily and very easily drawn into very fine wire
Description : Titanium metal (A) Exists in three allotropic forms (B) Cannot be welded (C) Is used in oceanographic and space exploration applications (D) None of these
Last Answer : (C) Is used in oceanographic and space exploration applications
Description : Consider the following statements. 1. Ozone is an allotropic form of oxygen 2. Phosphorus is present in DNA and RNA 3. Halogens occur in free state in nature. 4. The compounds of chlorine are used as cooling agents. The correct statements are: (a) 1 and 4 (b) 2 and 4 (c) 3 and 4 (d) 1 and 2
Last Answer : Ans:(d)
Description : Which allotropic form of sulphur is most stable at room temperature?
Last Answer : Which allotropic form of sulphur is most stable at room temperature? A. Rhombic B. Monoclinic C. Plastic D. Colloidal
Description : When a single gene controls the expression of more than one character, it is said to be - (1) Heterotrophic (2) Autotrophic (3) Allotropic (4) Pleiotropic
Last Answer : (4) Pleiotropic Explanation: When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example ... effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
Description : Pick out the wrong statement. (A) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water (B) Apatite is the principal material present in ... fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound fo
Last Answer : (C) Urea is more hygroscopic than ammonium nitrate
Description : Pick out the wrong statement. (A) 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid (B) Chemically unreactive nature of ... in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation
Last Answer : (C) Red phosphorous is the most reactive allotropic form of phosphorous
Description : The most stable allotropic form of phosphorous is the __________ phosphorous. (A) White (B) Black (C) Yellow (D) Red
Last Answer : (B) Black
Description : The most reactive allotropic form of phosphorus is __________ phosphorus. (A) Red (B) Yellow (C) Violet (D) Black
Last Answer : (B) Yellow
Description : Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of (A) Fusion (B) Vaporisation (C) Transition (D) None of these
Last Answer : (C) Transition
Description : Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of (A) Sublimation (B) Fusion (C) Transition (D) Vaporisation
Last Answer : C) Transition
Description : Allotropic modifications of phosphorus include each of the following EXCEPT: w) red phosphorus x) black phosphorus y) white phosphorus z) green phosphorus
Last Answer : ANSWER: Z -- GREEN PHOSPHORUS
Description : When a single gene controls the expression of more than one character, it is said to be (1) Heterotrophic (2) Autotrophic (3) Allotropic (4) Pleiotropic
Last Answer : Pleiotropic
Description : During pudding (A) Molten metal is kept clear of the fuel (B) Carbon is converted into carbonic acid gas (C) Silicon forms a slag (D) All the above
Last Answer : Answer: Option D