Description : Which is used in preparation of dynamite? (1) glycerol (2) ethyl alcohol (3) methyl alcohol (4) glycol
Last Answer : (1) glycerol Explanation: Dynamite is an explosive made of nitroglycerin, sorbents (such as powdered shells or clay) and stabilizers. It was invented by the Swedish chemist and engineer Alfred Nobel in Geesthacht, and patented in 1867.
Description : The alcohol used in the preparation of dynamite is----? A. ethyl alcohol B. glycerol (Answer) C. glycol D. methyl alcohol
Last Answer : B. glycerol (Answer)
Description : Fats and oils are (a) monoesters of glycerol (b) diesters of glycerol (c) triesters of glycerol (d) diesters of glycol
Last Answer : triesters of glycerol
Description : Which of the following compounds is least soluble in water? (a) Glycerol (b) Ethyl alcohol (c) Ethylene glycol (d) Ethyl chloride
Last Answer : Ethyl chloride
Description : Which of the following is used as an antifreeze? (a) Ethylene glycol (b) Glycerol (c) Diethyl ether (d) Picric acid
Last Answer : Ethylene glycol
Description : Chemically, fats are esters of long carbon-chain acids and which of the following: w) ethanol x) glycerol y) ethylene glycol z) sodium hydroxide
Last Answer : ANSWER: X -- GLYCEROL
Description : The number of moles of `HIO_(3)` formed during periodic oxidation of cyclohexa (1,2,3) triol____
Last Answer : The number of moles of `HIO_(3)` formed during periodic oxidation of cyclohexa (1,2,3) triol____
Description : Arrange the following compounds in increasing order of their acid strength. Benzoic acid, 4-Nitrobenzoic acid, 3, 4-dinitrobenzoic acid, 4-methoxy benzoic acid.
Last Answer : Since electron donating gps. decrease the acid strength therefore 4-methoxybenzoic acid is a weaker acid because methoxy sp. is E. D. G. than benzoic acid. Further since electron withdrawing gps. increase ... : 4-methoxybenzoic acid < benzoic acid < 4-nitrobenzoic acid < 3, 4, dinitrobenzoic acid.
Description : Which of the following molecules or ions is NOT formed when K metal reacts with liquid CH3OH? Is it: w) potassium ion x) hydrogen ion y) methoxy ion z) hydrogen molecule
Last Answer : ANSWER: X -- HYDROGEN ION
Description : Aspirin is (1) Methoxy benzoic acid (2) Methyl Salicilate (3) Acetyl Salicilic acid (4) Phenyl Salicilate
Last Answer : Acetyl Salicilic acid
Description : `C-O-C` bond in ethers can be cleaved by
Last Answer : `C-O-C` bond in ethers can be cleaved by A. `KMnO_(4)` B. `LiAlH_(4)` C. KOH D. HI
Description : The signal sequence of proteins is cleaved off (A) On the ribosomes immediately after synthesis (B) In the endoplasmic reticulum (C) During processing in Golgi apparatus (D) During passage through the cell membrane
Last Answer : Answer : B
Description : The β-ring of 7-dehydrocholesterol is cleaved to form cholecalciferol by (A) Infrared light (B) Dim light (C) Ultraviolet irridation with sunlight (D) Light of the tube lights
Last Answer : Answer : C
Description : β-Carotene, precursor of vitamin A, is oxidatively cleaved by (A) β-Carotene dioxygenase (B) Oxygenase (C) Hydroxylase (D) Transferase
Last Answer : Answer : A
Description : As a result of each oxidation a long chain fatty acid is cleaved to give (A) An acid with 3-carbon less and propionyl CoA (B) An acid with 2-carbon less and acetyl CoA (C) An acid with 2-carbon less and acetyl CoA (D) An acid with 4-carbon and butyryl CoA
Description : A growing peptide in a ribosome can not be shifted to the adjacent ribosome because (A) It is firmly attached (B) It will get the amino acid cleaved (C) The gap between the ribosomes is too big for a shift (D) The adjacent ribosomes have different composition
Description : IgG cleaved by papain into (A) Two light and two heavy chains (B) Two Fab and one Fc fragments (C) Two pairs of one light and one heavy chain each (D) One Fab and two Fc fragments
Description : Ethers are cleaved by acids not by based. Why ?
Last Answer : The C - O - C bond in ethers like the C - OH bond in alcohols is quite strong. In order to weaken it, the oxygen atom must be protonated. A subsequent nucleophile attack by a strong ... protonation of O atom of ether and therefore only acids can bring about the cleavage of ethers and not bases.
Description : The following are true about the Fc regions of an immunoglobulins: a. they can be cleaved from the Fab regions by papain b. they are involved in mast cell binding c. they are involved in the activation of the complement cascade d. all above
Last Answer : all above
Description : β-Carotene, precursor of vitamin A, is oxidatively cleaved by (A) β-Carotene dioxygenase (B) Oxygenase \ (C) Hydroxylase (D) Transferase
Last Answer : (A) β-Carotene dioxygenase
Description : 7. In a recombinant DNA technology a plasmid vector must be cleaved by a) the same enzyme that leaves the donor gene b) modified DNA ligase c) a heated alkaline solution d) four separate enzymes
Last Answer : a) the same enzyme that leaves the donor gene
Description : An appropriate reagent for the conversion of 1-propanol to 1-propanal is
Last Answer : An appropriate reagent for the conversion of 1-propanol to 1-propanal is A. acidified potassium ... . pyrindium chlorochromate D. acidified `CrO_(3)`
Description : This substance is commonly known as alcohol and is also used in medicines such as tincture iodine, cough syrups, and many tonics. This is - (1) Propanol (2) Butane (3) Ethanol (4) Methanol
Last Answer : (3) Ethanol Explanation: Ethanol is commonly called alcohol and is the active ingredient of all alcoholic drinks. Also, it is a good solvent and is used in medicines such as tincture iodine, cough syrups, and many tonics.
Description : Wood Spirit is which of the following? (1) Ethyl Alcohol (2) Propanol (3) Methyl Alcohol (4) Butanol
Last Answer : (3) Methyl Alcohol Explanation: Wood spirit (countable and uncountable, plural wood spirits) (countable) A dryad or other spiritual being associated with forests, woods, or trees. (Uncountable, often the wood spirit) Methyl Alcohol, a type of alcohol.
Description : Propionamide on heating with a mixture of bromine and sodium hydroxide gives (a) Propane (b) Propylamine (c) Propanol (d) Ethylamine
Last Answer : Ethylamine
Description : Which of the following compounds does not give iodoform test on treatment with I2/NaOH? (a) Ethanol (b) Propanone (c) 2-Propanol (d) Butanone
Last Answer : Butanone
Description : Hydroboration-oxidation of 2-Methylpropene gives (a) 2-Methyl-2-propanol (b) 1,2,3-Propanetriol (c) 2-Methyl-1-propanol (d) 1,2-Propanediol
Last Answer : 2-Methyl-1-propanol
Description : Which of the following alcohols will give a yellow precipitate of iodoform with iodine and dilute NaOH solution? (a) 1-Propanol (b) 2-Propanol (c) 1-Butanol (d) 2-Methyl-2-propanol
Last Answer : 2-Propanol
Description : Which of the following compounds reacts fastest with HBr? (a) 1-propanol (b) 2-methyl-1-propanol (c) 2-propanol (d) 2-methyl-2-propanol
Last Answer : 2-methyl-2-propanol
Description : Which of the following compounds will react fastest with Lucas reagent? (a) 1-propanol (b) 2-methyl-1-propanol (c) 2-propanol (d) 2-methyl-2-propanol
Description : Which of the following compounds reacts slowest with Lucas reagent at room temperature? (a) 1-butanol (b) 2-propanol (c) 2-butanol (d) 2-methyl-2-propanol
Last Answer : 1-butanol
Description : Which of the following gives positive Iodoform test : (a) 1-Propanol (b) 2-Propanol (c) 3-Propanol (d) None of these
Description : 2-Propanol reacts with KBr and concentrated H2SO4 to give (a) 1-Bromopropane (b) 1,2-Dibromopropane (c) 2-Bromopropane (d) 2,2-Dibromopropane
Last Answer : 2-Bromopropane
Description : Propyne reacts with aqueous H2SO4 in the presence of HgSO4 to form (a) acetone (b) 1-propanol (c) acetaldehyde (d) 2-propanol
Last Answer : acetone
Description : Propene reacts with Cl2 in H2O to give (a) 1-Chloro-2-propanol (b) 2-Chloro-2-propanol (c) 1-Chloro-1-propanol (d) 2-Chloro-1-propano
Last Answer : 1-Chloro-2-propanol
Description : The alcohol with lowest molecular weight is: w) isopropanol x) propanol y) ethanol z) methanol
Last Answer : ANSWER: Z -- METHANOL
Description : Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II. Column I Column II (a) Glycerol, fatty acids Duodenum, ... , glucose Small intestine, active absorption (d) Fructose, Na+ Small intestine, passive absorption
Last Answer : (c) Glycine, glucose Small intestine, active absorption
Description : Arrange the correct sequence of column II against the states in column I I. Chikkamagaluru II. Singhbhum III. Durg IV. Koraput -Geography
Last Answer : (a) III – 1, IV – 2, I – 3, II – 4
Description : What are some of the things you now know about (i) the people of Coorg? (ii) the main crop of Coorg? (iii) the sports it offers to tourists? (iv) the animals you are likely to see in Coorg? (v) its distance from Bangalore, and how to get ther -Democratic 10th
Last Answer : The Coorgi or Kodagu people are fiercely independent people comprising martial men and beautiful women who are believed to have descended from the Greeks or the Arabs. They have a strong tradition ... , which is the most frequented one. The other route is via Neelamangal, Kunigal, Chanrayanapatna.
Description : Check whether the following are quadratic equations: (i) (x+ 1)2=2(x-3) (ii) x - 2x = (- 2) (3-x) (iii) (x - 2) (x + 1) = (x - 1) (x + 3) (iv) (x - 3) (2x + 1) = x (x + 5) (v) (2x - 1) (x - 3) = (x ... vi) x2 + 3x + 1 = (x - 2)2 (vii) (x + 2)3 = 2x(x2 - 1) (viii) x3 -4x2 -x + 1 = (x-2)3 -Maths 10th
Last Answer : this is the correct answer!
Description : I have some matchsticks set up like this: I + XI = X. If you do not know Roman numerals, here is a quick starter: I=1 II=2 III=3 IV=4 V=5 VI=6 VII=7 VIII=8 IX=9 X=10 XI=11 ... are told to move the minimum number of matchsticks to make the question correct. So, how many do you have to move? -Riddles
Last Answer : Most people would get to one move at the least, but the real answer is zero moves. If you rotate the whole question around 180 degrees, it will display this: X = IX + I
Description : Give one feature of each of the following: (i) Mumbai port (ii) Marmagao port (iii) New Mangalore port (iv) Tuticorin port -SST 10th
Last Answer : (i) Mumbai port is the biggest one with a spacious natural and well shelpered harbour. (ii) Marmago port is the premier iron ore exporting port of the country. (iii) New Mangalore port, ... concentrates from Kudremukh mines. (iv) Tuticorin in Tamil Nadu has a natural harbour and rich hinterland.
Description : The breakdown of pyruvate to give carbon dioxide, water and energy takes place in (i) cytoplasm (ii) mitochondria (iii) chloroplast (iv) nucleus -Biology
Last Answer : The break down of pyruvate to give carbon dioxide, energy and water takes place in the presence of oxygen and is termed as aerobic respiration. This process takes place in the mitochondria of a cell.
Description : The autotrophic mode of nutrition requires (i) carbon dioxide and water (ii) chlorophyll (iii) sunlight (iv) all of the above -Biology
Last Answer : Autotrophic nutrition is the mode of nutrition in which green plants prepare their own food by the process of photosynthesis. It requires carbon dioxide, water, sunlight and chlorophyll. Hence, option (iv) is correct.
Description : The xylem in plants are responsible for (i) transport of water (ii) transport of food (iii) transport of amino acids (iv) transport of oxygen -Biology
Last Answer : The xylem in the plants is responsible for - i) transport of water. The Xylem vessel is a transport tissue present in vascular plants. The main function of xylem is to transport water from the roots to the shoots and leaves, but it also transports nutrient from one place to another.
Description : The kidneys in human beings are a part of the system for (i) nutrition (ii) respiration (iii) excretion (iv) transportation -Biology
Last Answer : Answer. The kidneys in human beings are a part of the system for excretion and it process of the metabolic waste which can eliminated from an organism. In this vertebrates this become primarily carried out ... and other part of the skin. it is more important process in major form of the life.
Description : ABCD is a trapezium in which AB || CD and AD = BC (see Fig. 8.23). Show that (i) ∠A = ∠B (ii) ∠C = ∠D (iii) ΔABC ≅ ΔBAD (iv) diagonal AC = diagonal BD [Hint : Extend AB and draw a line through C parallel to DA intersecting AB produced at E.] -Maths 9th
Last Answer : ] Solution: To Construct: Draw a line through C parallel to DA intersecting AB produced at E. (i) CE = AD (Opposite sides of a parallelogram) AD = BC (Given) , BC = CE ⇒∠CBE = ∠CEB also, ∠A+∠CBE = ... BC (Given) , ΔABC ≅ ΔBAD [SAS congruency] (iv) Diagonal AC = diagonal BD by CPCT as ΔABC ≅ ΔBA.
Description : In ΔABC and ΔDEF, AB = DE, AB || DE, BC = EF and BC || EF. Vertices A, B and C are joined to vertices D, E and F respectively (see Fig. 8.22). Show that (i) quadrilateral ABED is a parallelogram ( ... CF and AD = CF (iv) quadrilateral ACFD is a parallelogram (v) AC = DF (vi) ΔABC ≅ ΔDEF. -Maths 9th
Last Answer : . Solution: (i) AB = DE and AB || DE (Given) Two opposite sides of a quadrilateral are equal and parallel to each other. Thus, quadrilateral ABED is a parallelogram (ii) Again BC = EF and BC || EF ... (Given) BC = EF (Given) AC = DF (Opposite sides of a parallelogram) , ΔABC ≅ ΔDEF [SSS congruency]
Description : 8.Distinguish among soda water, milk and muddy water in a tabular form under the following heads : (i)Stability (ii)Filterability (iii)Type of mixture (iv) Tyndall effect -Chemistry
Last Answer : Here is the answer ..Sorry for bad handwriting...Hope it helps....They contain different types of minerals To achieve different tastes, club soda, sparkling, and tonic water cont A) homogeneity: ... . ... The main difference between the two is that tonic water also contains quinine and sweeteners.