Priyanshu 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
Bihar Board 12th Physics Objective Questions and Answers Bihar Board 12th Physics Objective Answers Chapter 14 Semiconductor Electronics: Materials, Devices and Simple Circuits Question 1. At absolute zero, Si acts as a (a) metal (b) Semiconductor (c) insulator (d) None of these Answer: (c) insulator Question 2. In good conductors of electricity the type of … Read more
Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 5 Principles of Inheritance and Variation Question 1. The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant were (a) 1 (b) 2 (c) 3 (d) 4 Answer: (c) 3 Question 2. _________ pairs of … Read more
Bihar Board 12th Economics Model Papers Bihar Board 12th Economics Model Question Paper 5 in English Medium Time : 3 Hour. 15 Min Full Marks : 100 Instructions Candidates are required to give their answers in their own words as far as practicable. Figures in the right hand margin indicate full marks. 15 minutes of … Read more
Bihar Board 12th Physics Objective Questions and Answers Bihar Board 12th Physics Objective Answers Chapter 3 Current Electricity Question 1. 1 ampere current is equivalent to (a) 6.25 × 1018 electrons s-1 (b) 2.25 × 1018 electrons s-1 (c) 6.25 × 1014 electrons s-1 (d) 2.25 × 1014 electrons s-1 Answer: (a) 6.25 × 1018 … Read more