Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 16 Environmental Issues Question 1. Which of the following is not a cause of natural pollution ? (a) Volcanic eruption (b) UV radiation (c) Forest fire (d) Mercury Answer: (d) Mercury Question 2. The Government of India has passed the … Read more
Bihar Board 12th Biology Objective Questions and Answers Bihar Board 12th Biology Objective Answers Chapter 15 Biodiversity and Conservation Question 1. The term biodiversity is popularised by (a) Odum (b) Paul Ehrlich (c) Edward Wilson (d) Tilman. Answer: (c) Edward Wilson Question 2. Western ghats have a greater number of amphibian species than the Eastern … Read more
Bihar Board 12th Physics Model Papers Bihar Board 12th Physics Model Question Paper 1 in Hindi परिक्षार्थियों के लिए निर्देश : परीक्षार्थी यथासंभव अपने शब्दों में उत्तर दें। दाहिनी ओर हाशिये पर दिये हुए अंक पूर्णांक निर्दिष्ट करते हैं। उत्तर देते समय परीक्षार्थी यथासंभव शब्द-सीमा का ध्यान रखें। इस प्रश्न-पत्र को ध्यानूपर्वक पढ़ने के लिये … Read more
Bihar Board 12th Maths Objective Questions and Answers Bihar Board 12th Maths Objective Answers Chapter 11 Three Dimensional Geometry Question 1. Direction cosines of the line that makes equal angles with the three axes in space are Answer: (c) Question 2. If the direction ratios of a line are 1, -3, 2, then its direction … Read more
Bihar Board 12th Chemistry Objective Questions and Answers Bihar Board 12th Chemistry Objective Answers Chapter 13 Amines Question 1. Nitrogen atom of amino group is……….. hybridised. (a) sp (b) sp2 (c) sp3 (d) sp3d Answer: (c) sp3 Question 2. C3H9N cannot represent (a) 1° amine (b) 2° amine (c) 3° amine (d) quaternary ammonium salt … Read more
Bihar Board 12th Chemistry Objective Questions and Answers Bihar Board 12th Chemistry Objective Answers Chapter 12 Aldehydes, Ketones and Carboxylic Acids Question 1. Which of the following structures is not correctly matched ? Answer: (c) Question 2. Which of the following carbonyl compounds is most polar ? Answer: (d) Question 3. Ketones can be obtained … Read more
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