Bihar DELEd Science Questions and Answer, Download PDF

Cracking the Bihar D.El.Ed. exam and securing a spot as a primary school science teacher requires a strong foundation in scientific concepts. This article dives into potential Science question formats you might encounter on the exam, along with tips and approaches to answer them effectively. We’ll explore a range of topics from basic Physics and Chemistry to Biology and ways to make science learning engaging for young minds.

Bihar DELEd Science Questions: Overview

Bihar DELEd Science Questions section comes in Bihar DELED 2024 Exam by BSEB. Candidate can check the details Bihar DELEd Science Questions highlights here in below table. For further details, refer to the following table.

Bihar DElEd Exam Pattern 2024

The Bihar DElEd Entrance Exam, also known as the Joint Entrance Examination (JEE), is conducted by the Bihar School Examination Board (BSEB) for admission into the Diploma in Elementary Education (D.El.Ed) course in the state. Here’s a breakdown of the Bihar DElEd Exam Pattern 2024:

• Mode of Exam: Offline (Pen and Paper Based)
• Total Number of Questions: 120 Multiple Choice Questions (MCQs)
• Total Marks: 120 Marks
• Marking Scheme: One mark for each correct answer, no negative marking
• Duration of Exam: 150 Minutes (2 hours and 30 minutes)

Download Bihar DELEd Science Questions PDF

Below is the direct link provided to download the Bihar DELEd Science Questions PDF. Candidates are encouraged to click on the link below to access and download the Bihar DELEd Science Questions for their Bihar Deled Exam preparation.

Bihar DELEd Science Questions and Answer

Q1. Which of the following potassium compounds is known as “Pearl ash”?
(a) K₂SO₄
(b) K₂CO₃
(c) KMnO₄
(d) KOH

Q2. The process by which vegetable ghee is manufactured is known as-
(a) Saponification
(b) Hydrogenation
(c) Esterification
(d) Hydrolysis

Q3.Salts of which of the following elements provide colors to fireworks?
(a) Zinc and sulphur
(b) Potassium and mercury
(c) Strontium and barium
(d) Chromium and nickel

Q4. Light scattering takes place in –
(a) Electrolytic solutions
(b) Colloidal solutions
(c) Electrodialysis
(d) Electroplating

Q5. Which one of the following is not an inert gas?
(a) Helium
(b) Neon
(c) Freon
(d) Xenon

Q6. Neha by chance mixed acetone with alcohol. The mixture of acetone and alcohol can be separated by-
(a) Filtration
(b) Separating funnel
(c) Fractional crystallization
(d) Fractional distillation

Q7. Milk can be preserved by adding a few drops of-
(a) HCHO solution
(b) HCOOH solution
(c) CH3CHO solution
(d) CH3COOH solution

Q8. PET bottles and jars are commonly used for storing edible items. PET is very familiar form of-
(a) Polyamide
(b) Polyester
(c) Acrylic
(d) Rayon

Q9. Higher concentration of Nitrogen-dioxide in atmosphere causes-
(a) Cancer
(b) Bronchitis
(c) Asphyxiation
(d) Corrosion

Q10. Cement factory workers are prone to –
(a) Asbestosis
(b) Leukemia
(c) Bone Marrow disease
(d) Cytosilicosis

S1. Ans.(b)
Sol. Potassium carbonate is the inorganic compound with the formula K₂CO₃. It is a white salt, which is soluble in water. It is deliquescent, often appearing as a damp or wet solid. Potassium carbonate is mainly used in the production of soap and glass.

S2. Ans.(b)
Sol. Vegetable ghee is manufactured by hardening vegetable oils through a process of hydrogenation. H2C = CH2 + H2→C2H6H2C = CH2 + H2→C2H6 The above reaction is a simple hydrogenation reaction. Hydrogenation reaction of unsaturated fatty acids is basically the reaction where the hydrogen gets added in the double bond of the alkene or alkyne in presence of nickel. Nickel acts like a catalyst in solid state.

S3. Ans.(c)
Sol. The colors in fireworks are created by the use of metal salts. Metal salts commonly used in firework displays include: strontium carbonate (red fireworks), calcium chloride (orange fireworks), sodium nitrate (yellow fireworks), barium chloride (green fireworks) and copper chloride (blue fireworks).

S4. Ans.(b)
Sol. The term Tyndall effect is generally applied with the effect of light scattering on particles in colloid systems.

S5. Ans.(c)
Sol. Helium, Xenon, Neon are inert gases. Inert gases are the chemical elements which are having a very stable configuration. That is inert gases will be having octet valence electrons in its utermost shell. Inert gases can also be referred to as noble gases.

S6. Ans.(d)
Sol. A mixture of acetone and alcohol can be separated by fractional distillation. Fractional distillation is the separation of a mixture into its component parts, or fractions. Chemical compounds are separated by heating them to a temperature at which one or more fractions of the mixture will vaporize. It uses distillation to fractionate.

S7. Ans.(a)
Sol. Formaldehyde solution is an emulsifier which is added in the milk as it acts as a preserving agent for the milk. It kills most of the bacteria and fungi present in the solution. As it kills the microbes presentin the solution, we can use it as preservative so that it will not allow the microorganisms to grow in the milk and as a result we can preserve for longer times.

S8. Ans.(b)
Sol. It is a form of polyester. The full form of PET is polyethylene terephthalate. It is used for making bottles, containers, wires, utensils, jars, etc.

S9. Ans.(b)
Sol. Bronchitis. Elevated levels of nitrogen dioxide can cause damage to the human respiratory tract and increase a person’s vulnerability to, and the severity of, respiratory infections and asthma. Nitrogen dioxide can fade and discolor furnishings and fabrics, reduce visibility, and react with surfaces.

S10. Ans.(d)
Sol. Cytosilicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs.

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