Bihar Board 12th Maths Objective Questions and Answers Bihar Board 12th Maths Objective Answers Chapter 10 Vector Algebra Question 1. If are the direction cosines of a line, then the value of n is (a) (b) (c) (d) Answer: (a) Question 2. Find the magnitude of vector . (a) √157 (b) 4√11 (c) √213 (d) … Read more
Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 14 Ecosystem Question 1. Term ‘ecosystem’ was coined by (a) Odum (b) Tansley (c) Lindeman (d) Elton. Answer: (b) Tansley Question 2. Which of the following pairs is not correct ? (a) E. Haeckel – Coined the term ‘Ecology’ (b) … Read more
Bihar Board 12th Maths Objective Questions and Answers Bihar Board 12th Maths Objective Answers Chapter 9 Differential Equations Question 1. The order of the differential equation of all tangent lines to the parabola y = x2 is (a) 1 (b) 2 (c) 3 (d) 4 Answer: (a) 1 Question 2. The differential equation of all parabolas … Read more
Bihar Board 12th English Model Papers Bihar Board 12th English 50 Marks Model Question Paper 2 Time: 01 Hours 37.5 Minutes Full Marks : 50 Instructions Candidates are required to give their answers in their own words as far as parcticable. Figures in the right hand margin indicate full marks. While answering the candidate should … Read more
Bihar Board 12th Chemistry Objective Questions and Answers Bihar Board 12th Chemistry Objective Answers Chapter 11 Alcohols, Phenols and Ethers Question 1. IUPAC name of (a) 3-propylbutan-l-ol (b) 2-ethylpentan-l-ol (c) 3-methyl hydroxyhexane (d) 2-ethyl-2-propyl ethanol Answer: (a) 3-propylbutan-l-ol Question 2. A compound C6H4O2 has two tertiary alcoholic groups. The IUPAC name of this compound is … Read more
Bihar Board 12th English Model Papers Bihar Board 12th English 100 Marks Model Question Paper 2 Time 3 Hrs, 15 Minutes Full Marks: 100 Instructions Candidates are required to give their answers in their own words as for as practicable. Figures in the right hand margin indicate full marks. While answering the candidate should adhere … Read more
Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 13 Organisms and Populations Question 1. Refer to the given flow chart. Identify X and select the correct option. (a) Communities (b) Biospheres (c) Biomes (d) Species Answer: (a) Communities Question 2. Basic unit of ecological hierarchy is (a) population … Read more
Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 12 Biotechnology and its Applications Question 1. All are the biotechnological applications in order to increase food production except (a) apiculture (b) agro-chemical based agriculture (c) organic farming (d) genetically engineered crop-based agriculture. Answer: (a) apiculture Question 2. Agro-chemical based … Read more
Bihar Board 12th Physics Objective Questions and Answers Bihar Board 12th Physics Objective Answers Chapter 9 Ray Optics and Optical Instruments Question 1. What can be the largest distance of an image of a real object from a convex mirror of radius of curvature is 20 cm ? (a) 10 cm (b) 20cm (c) Infinity … Read more
Bihar Board 12th Chemistry Objective Questions and Answers Bihar Board 12th Chemistry Objective Answers Chapter 10 Haloalkanes and Haloarenes Question 1. Which of the following is a primary halide ? (a) iso-Propyl iodide (b) sec-Butyl iodide (c) tert-Butyl bromide (d) neo-Hexyl chloride Answer: (a) iso-Propyl iodide Question 2. Which of the following is not an … Read more
Bihar Board 12th Maths Objective Questions and Answers Bihar Board 12th Maths Objective Answers Chapter 8 Application of Integrals Question 1. If y = 2 sin x + sin 2x for 0 ≤ x ≤ 2π, then the area enclosed by the curve and x-axis is (a) sq. units (b) 8 sq. units (c) 12 … Read more