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Tamil Nadu Board of Secondary EducationHSC Science कक्षा १२

HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Important Questions

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State Huygen’s principle.

Appears in 9 question papers
Chapter: [7] Wave Optics
Concept: Huygens' Principle

Explain pseudo-first-order reaction with an example.

Appears in 4 question papers
Chapter: [7] Chemical Kinetics
Concept: Pseudo First Order Reaction

Obtain the condition for bridge balance in Wheatstone’s bridge.

Appears in 4 question papers
Chapter: [2] Current Electricity
Concept: Kirchhoff’s Laws

What is mass defect?

Appears in 4 question papers
Chapter: [9] Atomic and Nuclear Physics
Concept: Mass Defect and Binding Energy

Why first ionization enthalpy of chromium is lower than that of zinc?

Appears in 3 question papers
Chapter: [4] Transition and Inner Transition Elements
Concept: General Trend in Properties

Explain about the compound microscope and obtain the equation for magnification.

Appears in 3 question papers
Chapter: [7] Wave Optics
Concept: Optical Instruments >> Compound Microscope

GEAC stands for ______.

Appears in 3 question papers
Chapter: [10] Applications of Biotechnology
Concept: Ethical Issues

Define unit cell.

Appears in 2 question papers
Chapter: [6] Solid State
Concept: Classification of Crystalline Solids

Define Current density.

Appears in 2 question papers
Chapter: [2] Current Electricity
Concept: Ohm's Law

Give reasons:

Genetic code is ‘universal’.

Appears in 2 question papers
Chapter: [5] Molecular Genetics
Concept: Genetic Code

Differentiate foeticide and infanticide.

Appears in 1 question paper
Chapter: [2.03] Reproductive Health
Concept: Social Impact of Sex Ratio, Female Foeticide and Infanticide

Write the scientific name of the filarial worm that causes filariasis.

Appears in 1 question paper
Chapter: [2.07] Human Health and Diseases
Concept: Common Diseases in Human Beings

List out the functions of the tapetum.

Appears in 1 question paper
Chapter: [1] Asexual and Sexual Reproduction in Plants
Concept: Pre-fertilization in Plant: Structure and Events

Give the uses of sulphuric acid.

Appears in 1 question paper
Chapter: [3] p-block Elements - II
Concept: Oxygen

Why do zirconium and Hafnium exhibit similar properties?

Appears in 1 question paper
Chapter: [4] Transition and Inner Transition Elements
Concept: Electronic Configurations >> The f-Block Elements (Inner-transition Elements)

Transition metals show high melting points why?

Appears in 1 question paper
Chapter: [4] Transition and Inner Transition Elements
Concept: General Trend in Properties

Derive integrated rate law for a zero-order reaction \[\ce{A -> Product}\].

Appears in 1 question paper
Chapter: [7] Chemical Kinetics
Concept: Zero Order Reactions

Write Arrhenius equation and explains the terms involved.

Appears in 1 question paper
Chapter: [7] Chemical Kinetics
Concept: Arrhenius Equation – the Effect of Temperature on Reaction Rate

Explain the common ion effect with an example.

Appears in 1 question paper
Chapter: [8] Ionic Equilibrium
Concept: Common Ion Effect

How will you prepare acetic anhydride from acetic acid?

Appears in 1 question paper
Chapter: [12] Carbonyl Compounds and Carboxylic Acids
Concept: Chemical Properties of Aldehydes and Ketones
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