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Bihar Board 12th Physics Objective Questions and Answers Bihar Board 12th Physics Objective Answers Chapter 12 Atoms Question 1. In Geiger-Marsden scattering experiment, the trajectory traced by an a-particle depends on (a) number of collision (b) number of scattered a-particles (c) impact parameter (d) none of these Answer: (c) impact parameter Question 2. In the … Read more

Bihar Board 12th Chemistry Objective Questions and Answers Bihar Board 12th Chemistry Objective Answers Chapter 6 General Principles and Processes of Isolation of Elements Question 1. Which of the following example is not correctly matched ? (a) Two most abudant elements-Fe, Al (b) Two metals which occur in native state-Au, Pt (c) Two metals which … Read more

Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 10 Microbes in Human Welfare Question 1. Microbes are present in (a) soil (b) thermal vents (c) polluted water (d) all of these Answer: (d) all of these Question 2. Which of the following microbes is a proteinacious infectious agent … Read more

Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 9 Strategies for Enhancement in Food Production Question 1. Which of the following is the “bird flu virus” ? (a) H5N1 (b) Haemophilus influenzae (c) HIV (d) Rhino virus Answer: (a) H5N1 Question 2. The infectious and contagious bacterial disease … Read more

Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 8 Human Health and Disease Question 1. Which of the following facrtors affect human health ? (i) Infections (ii) Silent mutation (iii) Life style (iv) Genetic disorders (a) (i), (ii)and(iv) (b) (i) and (ii) (c) (i), (iii) and (iv) (d) … Read more

Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 7 Evolution Question 1. One of the possible early sources of energy was/were (a) CO2 (b) chlorophyll (c) green plants (d) UV rays and lightning. Answer: (d) UV rays and lightning. Question 2. Abiogenesis theory of origin supports (a) spontaneous … Read more

Bihar Board 12th Chemistry Objective Questions and Answers Bihar Board 12th Chemistry Objective Answers Chapter 5 Surface Chemistry Question 1. Which of the following is less than zero during adsorption ? (a) ΔG (b) ΔS (c) ΔH (d) All of these Answer: (d) All of these Question 2. Which of the following is a property … Read more

Bihar Board 12th Physics Objective Questions and Answers Bihar Board 12th Physics Objective Answers Chapter 13 Nuclei Question 1. The natural boron of atomic weight 10.81 is found to have two isotopes 10B and nB. The ratio of abundance of isotopes of natural boron should be (a) 11: 10 (b) 81 : 19 (c) 10:11 … Read more

Bihar Board 12th Physics Objective Questions and Answers Bihar Board 12th Physics Objective Answers Chapter 4 Moving Charges and Magnetism Question 1. A strong magnetic Held is applied on a stationary electron. Then the electron. (a) moves in the direction of the field. (b) remains stationary. (c) moves perpendicular to the direction of the field. … Read more

Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 6 Molecular Basis of Inheritance Question 1. In DNA strand, the nucleotides are linked together by (a) glycosidic bonds (b) phosphodiester bonds (c) peptide bonds (d) hydrogen bonds. Answer: (b) phosphodiester bonds Question 2. If a double stranded DNA has … Read more

Bihar Board 12th Chemistry Objective Questions and Answers Bihar Board 12th Chemistry Objective Answers Chapter 4 Chemical Kinetics Question 1. When a chemical reaction takes place, during the course of the reaction the rate of reaction (a) keeps on increasing with time (b) remains constant with time (c) keeps on decreasing with time (d) shows … Read more