MCQs on Coordinate or Dative Bonding When two species A and B form an electron-pair bond and A does not provide its electrons for bonding, the bond present between A and B must be ionic covalent dative Hydrogen Answer: (c) Each of the following pairs of chemical species will combine. …
MCQs on Polarisation and Fajans Rule The molecule, which contains sp3d2 and p orbitals overlapping in it is PCl5 BrF5 ClF3 IF7 Answer: (b) Homolytic fission of C-C bond of ethane (C2H6) which gives an intermediate in which carbon atom is sp3 hybridised sp2 hybridised sp hybridised sp3d hybridised Answer: …
MCQs on Hybridisation The compound which contains both ionic and covalent bond: KCl KCN CH4 H2 Answer: (b) The maximum number of 90o angles between bond pair-bond pair of electrons is observed in dsp2 hybridisation sp3d hybridisation dsp3 hybridisation sp3d2 hybridisation Answer: (d) Ether is more volatile than alcohol having …
MCQs on Soil Pollution Which of the following serves as an indicator of atmospheric pollution? fern liverworts hornworts epiphytic lichens Answer: (d) In 1984, the Bhopal gas tragedy took place because methyl isocyanate reacted with ammonia reacted with water reacted with DDT reacted with CO2 Answer: (b) Negative soil pollution …
MCQs on Corrosion Which of the following methods is not used for the prevention of corrosion? greasing painting plating Heating Answer: (d) Widening of a river valley takes place due to corrosion lateral erosion corrasion hydraulic action Answer: (b) Elements which have properties of metals and nonmetals are amorphous crystalline …
MCQs on Hydrogen Electrolysis of brine produces chlorine gas hydrogen gas sodium hydroxide all the above Answer: (d) A reactant containing the element that is oxidised is called reducing agent oxidising agent hydrogen sublime Answer: (a) By losing one or two electrons the atoms of metal are oxidised reduced hydrogenated …
MCQs on Hydrogen Peroxide The structure of hydrogen peroxide is Planar Spherical Linear Non-planar Answer: (d) Fenton’s reagent is Zn + HCl Sn + HCl FeSO4 + H2O2 None Answer: (c) Hydrogen peroxide is oxidising agent reducing agent oxidising as well as reducing None Answer: (c) In the disproportionation Hydrogen peroxide, forming H2O …
MCQs on Equilibrium State Equimolar solutions of the following compounds are prepared separately in water. Which will have the lowest pH value? BeCl2 SrCl2 CaCl2 MgCl2 Answer: (a) Addition of which chemical will decrease the hydrogen ion concentration of an acetic acid solution? NH4Cl Al2(SO4)3 AgNO3 NaCN Answer: (d) In …
MCQs on Law of Equilibrium and Equilibrium Constant Could BF3 acidity be clarified using one of the following concepts? Arrhenius concept Bronsted Lowry concept Lewis concept Bronsted Lowry as well as Lewis concept Answer: (c) What will be the value of pH of 0.01 mol dm-3 CH3COOH (Ka = 1.74 …
MCQs on Le Chatelier Principle and its Application In what manner will increase of pressure affect the following equation C(s) + H2O → CO(g) + H2(g) shift in the reverse direction shift in the forward direction increase in the yield of hydrogen no effect Answer: (a) The equilibrium between water …
MCQs on Acids and Bases Bleaching powders chemical name is calcium hypo oxychloride calcium oxychloride calcium chloride calcium chloro oxide Answer: (b) The ratio of the water molecule in plaster of paris and gypsum is 3:1 1:3 1:4 4:3 Answer: (c) Baking powder is sodium carbonate + sodium tartaric sodium …
MCQs on First Law of Thermodynamics and Hess Law The variations in enthalpy that can not be detected per calorimeter can be detected with the aid of Newton’s law Hess’s law Krebs law Ohm’s law Answer: (b) The energy required to sever a given covalent bond is named bond energy …
MCQs on Heat of Reaction The energy released in the form of nuclear radiation in addition to heat and light during nuclear reactions is known as chemical energy nuclear energy heat energy electrical energy Answer: (b) Fireworks release energy in the form of heat sound light all of the above …
MCQs on Conductor and Conductance The unit of conductance cannot be expressed in mho (ohm)-1 siemens ohm/m Answer: (d) The SI unit of specific resistance is ohm m ohm/m ohm/m2 (ohm)-1 Answer: (a) The reciprocal of resistivity of a conductor is conductance capacitance conductivity none of these Answer: (c) In …
MCQs on Alkyne Ethyne and Ethane can be separated from a mixture by passing it through (a) Pyrogallol (b) Charcoal powder (c) Concentrated H2SO4 (d) Ammonical Cu2Cl2 1-butyne and 2-butyne can be identified by using which of the following reagents? (a) O2 (b) Br2 (c) NaNH2 (d) HCl Which of …
MCQs on Valence Bond Theory In which year was the Valence bond theory introduced? (a) 1927 (b) 1920 (c) 1930 (d) 1935 The oxygen molecule is paramagnetic. It can be explained by (a) Resonance (b) Hybridisation (c) Valence bond theory (d) Molecular orbital theory Bond angle of 120° is found …
MCQs on Chlorofluorocarbons 1. Which of the following statements is true about chlorofluorocarbons? Chlorofluorocarbons are used as refrigerants Chlorofluorocarbons are used as fuel for air crafts Chlorofluorocarbons are used as repairers of the ozone layer Chlorofluorocarbons are used as repairers of the troposphere Sol. (a) Chlorofluorocarbons are used as refrigerants. …
MCQs on Molecular Biology 1. The function of β subunit of polymerase is a. Template binding b. Catalytic binding c. Promoter binding d. Cation binding 2. Which of the σ factors is heat stable? a. σ 54 b. σ 70 c. σ 28 d. σ 32 3. The mRNA codon …
MCQs on Photosynthesis 1. Photosynthesis occurs in a. Chloroplast b. Golgi body c. Endoplasmic reticulum d. Nucleus 2. The optimum temperature for photosynthesis is a. 25-35℃ b. 10-15℃ c. 35-40℃ d. 20-25℃ 3. Photorespiration occurs in a. Four cell organelles b. Two cell organelles c. One cell organelle d. Three …
MCQs on Human Reproduction 1. _______ is a lytic enzyme released by the sperm. a. Hyaluronidase b. Trypsin c. Helicase d. None of the above 2. How many autosomes does a human primary spermatocyte have? a. 34 b. 44 c. 54 d. 33 3. Where does the ovum receive the …
MCQs on Animal Physiology 1. Where are histamine-secreting cells found? a. Nervous tissue b. Connective tissue c. Areolar tissue d. None of the above 2. What is collagen? a. Fat b. Protein c. Carbohydrate d. None of the above 3. Where are Haversian canals found? a. Humerus b. Medula c. …