Description : Which of the following is/are incorrect statements(s) for phosphine ?
Last Answer : Which of the following is/are incorrect statements(s) for phosphine ? A. It is less basic then ` ... burns in air forming predominantly `H_(3)PO_(4)`
Description : What is phosphine ?
Last Answer : Phosphine is the hydride of phosphorus , signaled PH3.
Description : Phosphine is prepared by the action of
Last Answer : Phosphine is prepared by the action of A. `P and HNO_(3)` B. `P and H_(2)SO_(4)` C. `P and NaOH` D. `P and H_(2)S`
Description : Phosphine is not obtained by the reaction
Last Answer : Phosphine is not obtained by the reaction A. White P is heated with NaOH B. Red P is ... D. Phosphorus trioxide is boiled with water under pressure
Description : Which of the following is used for refrigeration? (1) Sulphur dioxide (2) Chlorine (3) Freon (4) Phosphine
Last Answer : (3) Freon Explanation: Common refrigerants used in domestic refrigerators are Freon, neon and nitrogen. It flows through four components of refrigerator again and again.
Description : Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.
Last Answer : Ans: i) Hydrogen bond is found in H2O but not in H2S. ii) Hydrogen bond is found in NH3 but not in PH3. iii) Because they have low ionization energy.
Description : Why is phosphine weaker base than Ammonia?
Last Answer : Ans: P is bigger than N, therefore lone pair of electrons are less available on P than N.
Description : Both white phosphorous as well as red phosphorous (A) Are soluble in CS2 (B) Burns when heated in air (C) Reacts with hot caustic soda solution to give Phosphine (D) All (A), (B), and (C)
Last Answer : (B) Burns when heated in air
Last Answer : Freon
Description : Which of the following statements(s) is/are incorrect for `SF_(4)` molecule?
Last Answer : Which of the following statements(s) is/are incorrect for `SF_(4)` molecule? A. It has a ... the final product during the hydrolysis of `SF_(4)`
Description : Which is the correct statement(s) for Non Recursive predictive parser? S1: First(α) = {t | α => * t β for some string β } => *tβ S2: Follow(X) = { a | S => * αXa β for some strings ... and S2 is correct. (C) S1 is correct and S2 is incorrect. (D) Both statements S1 and S2 are correct.
Last Answer : (D) Both statements S1 and S2 are correct.
Description : Which of the following statements are incorrect ?a)Photosynthesis is a chemical change b) Digestion is a chemical change c)Formation of manure from vegetable was ... -Science-7
Last Answer : Option d) Iron and rust are the same substance. Iron and rust are different substances. Iron : Fe and Rust :
Description : Which of the following statements is incorrect in the context of a worm? -Technology
Last Answer : (d) A worm is a self-replicating software and thus, it can travel on its own.
Description : Two substances, A and B were made to react to form a third substance, A2B according to the following reaction 2A + B → A2 B. Which of the following statements concerning this reaction are incorrect? -Chemistry 9th
Last Answer : (c) (i), (iii), (iv) Consider the example of H2O
Description : Which of the following statements are not incorrect `:-` (i) Liver, the largest gland in our body secretes cholesterol, degrade steroid hormones, vita
Last Answer : Which of the following statements are not incorrect `:-` (i) Liver, the largest gland in our body secretes ... I,ii,iv C. I only D. I,ii,iv
Description : Which one of the following statements is incorrect
Last Answer : Which one of the following statements is incorrect A. The residual air in lungs slightly ... flow facilitates efficient respiration in gills of fishes
Description : Select the incorrect statements `:-` (a) alimentary canal begins with an anterior cavity called buccal cavity. (b) tooth is embeedded in a socket of m
Last Answer : Select the incorrect statements `:-` (a) alimentary canal begins with an anterior cavity called buccal cavity. (b) tooth ... ,& c C. a,c,&d D. a,b &d
Description : Select the incorrect statements
Last Answer : Select the incorrect statements A. Natural selection is a heritable variation & by reproducting leave ... dry up in sun unlike those of Amphbians
Description : Find out incorrect statements in relation to pollution
Last Answer : Find out incorrect statements in relation to pollution A. Plastic is nondegradable pollutant B. ... Ozone layer forms protective shield to ionosphere.
Description : Which one of the following statements is incorrect about enzyme catalysis ?
Last Answer : Which one of the following statements is incorrect about enzyme catalysis ? A. Enzymes are ... at optimum temperature D. Enzymes action is specific
Description : Which of the following are incorrect statements ?
Last Answer : Which of the following are incorrect statements ? A. Hardy schulz rule is related to coagulation ... more is the protective power of lyophillic sols.
Description : From the following statements regarding `H_(2)O_(2)`, choose the incorrect statements:
Last Answer : From the following statements regarding `H_(2)O_(2)`, choose the incorrect statements: A. It can act only ... dark D. It has to be kept away from dust
Description : Which of the following statements regarding sulphur is incorrect?
Last Answer : Which of the following statements regarding sulphur is incorrect? A. `S_(2)` molecule is paramagnetic ... is never less than +4 in its compounds
Description : A gas is obtained on heating ammonium nitrate. Which of the following statements are incorrect about this gas
Last Answer : A gas is obtained on heating ammonium nitrate. Which of the following statements are incorrect about this ... acidic in nature D. is basic in nature
Description : Which one of the following statements regarding helium is incorrect?
Last Answer : Which one of the following statements regarding helium is incorrect? A. (1) It is used to produce ... (4) It is used in gas-cooled nuclear reactors
Description : Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect:
Last Answer : Coordination compounds have great importance in biological systems. In this context which of the ... green pigments in plants and contain calcium.
Description : Read the following statements and find out the incorrect statement.
Last Answer : Read the following statements and find out the incorrect statement. A. In organisms, exhibiting ... reduction in the number of eggs produced.
Description : Which one of the following statements is incorrect regarding Bhopal gas tragedy ?
Last Answer : Which one of the following statements is incorrect regarding Bhopal gas tragedy ? A. It took ... beings died D. Radioactive fall out engulfed Bhopal
Description : Mark incorrect statements :- (A) Meiosis involves only a single cycle of DNA replication (B) Four haploid cells are formed at the end of meiosis-I ( C
Last Answer : Mark incorrect statements :- (A) Meiosis involves only a single cycle of DNA replication (B) Four haploid ... and C C. Only B D. All are correct
Description : Which one of the following statements for pyramid of energy is incorrect whereas remaining three are correct?
Last Answer : Which one of the following statements for pyramid of energy is incorrect whereas remaining three are ... organisms D. It is inverted in shape.
Description : Which of the statements is incorrect w.r.t. melatonin hormone ?
Last Answer : Which of the statements is incorrect w.r.t. melatonin hormone ? A. Shows diumal variation B. ... C. Secreted by pineal body D. Poorly vascularized
Description : Which of the following statements is incorrect ?
Last Answer : Which of the following statements is incorrect ? A. Pars intermedia atrophies during fetal ... D. Herring bodies are present in neurohypophysis.
Description : Which of the following statements are incorrect regarding following reaction?
Last Answer : Which of the following statements are incorrect regarding following reaction? A. Product is ... is endocyclic alkene formed according to Hofmann
Description : Which of the following statements is incorrect?
Last Answer : Which of the following statements is incorrect? A. 2, 4,6 trimethy phenol is less acidic than ... chloro phenol is less acidic the para flouro phenol.
Description : Among the following statements, the incorrect one is
Last Answer : Among the following statements, the incorrect one is A. cassiterite ore of tin contains the ... from Bessomer converter is called as blister copper.
Last Answer : Among the following statements, the incorrect one is A. Calamine and siderite are carbonates B. ... D. Malachite and azurite are ores of copper
Last Answer : Which one of the following statements regarding helium is incorrect? A. It is used to produce and ... D. It is used in gas-cooled nuclear reactors
Description : Which of the following statements are incorrect
Last Answer : Which of the following statements are incorrect A. `SO_(3)` is stronger oxidising agent and more acidic than ... the order `SO_(2)ltSeO_(2)ltTeO_(2)`
Description : Which of the following statements regarding thiosulphate ion is incorrect
Last Answer : Which of the following statements regarding thiosulphate ion is incorrect A. Shape of ... with iodine thisoulphate ion is tetrathionat ion
Last Answer : Which of the following statements regarding sulphur is incorrect? A. `S_(2)` molecule is paramagnetic B. ... is never less than `+4` its compounds.
Description : Of the following statements about the major soil types, the incorrect one is : (a) alluvial soils are easy to plough (b) red soils are rich in phosphorus, nitrogen and lime content ( ... regions which receive heavy seasonal rainfall (d) black soil is highly retentive of moisture and very productive
Last Answer : Ans: (b)
Description : All the following statements about recognition of a codon on mRNA by an anticodon on tRNA are correct except (A) The recognition of the third base of the codon is not very precise (B) ... degeneracy of the genetic code (D) Wobble results in incorporation of incorrect amino acids in the protein
Last Answer : Answer : D
Description : Which one of the following statements is incorrect? (A) Insulin increases glucose phosphorylation (B) Insulin increases glycolysis (C) Insulin augments HMP shunt (D) Insulin promotes gluconeogenesis
Description : Which of the following statements regarding cytokines is incorrect? A. Cytokines act directly on target cells and may potentiate the actions of one another. B. Interleukin 1 (IL-1) ... organ dysfunction syndrome because of its multiple actions and the secondary cascades that it stimulates.
Last Answer : Answer: C DISCUSSION: Cytokines are soluble peptide molecules that are synthesized and secreted by a number of cell types in response to injury, inflammation, and infection. Cytokines, which ... is thought to play a central role in the stress response, particularly in response to endotoxemia
Description : Which of the following statements is incorrect? (a) The mass of a body is not the same as its weight (b) Mass is a measure of quantity of matter whereas weight is a force (c) Mass of a ... but its weight remains constant (d) In the MKS system, mass is expressed in kilogram and weight in newton
Last Answer : Ans:(c)