Introduction to Energy

IMPORTANT

Introduction to Energy: Overview

This Topic covers sub-topics such as Energy, Thermodynamics, Hydrogen Fuel Cell, Changes around Us, Bio Fuel, Safety Matches, Significance of Time and Technology in Resource Creation and, Chemicals Used in Preparation of Safety Matches

Important Questions on Introduction to Energy

MEDIUM
IMPORTANT

Why hydrogen can not use as a domestic fuel?

EASY
IMPORTANT

Define biofuel.

MEDIUM
IMPORTANT

What is thermodynamics?

EASY
IMPORTANT

Select whether the following statement is True or False:

Electric ray fish are a group of  flattened cartilaginous fishes with enlarged pectoral fins. They are known for being capable of producing an electric discharge, ranging from 8 to 220 volts, depending on species, and they use this electric discharge to stun prey and for defence.

HARD
IMPORTANT

Describe the mechanism involved in the production of electricity in electric ray fish.

HARD
IMPORTANT

Does production of nitrogen dioxide during lightning makes soil fertile?

MEDIUM
IMPORTANT

Write how people led to creation of resources.

MEDIUM
IMPORTANT

Explain the importance of time and technology for resources.

EASY
IMPORTANT

Antimony trisulphide, sulphur, potassium chlorate are the chemicals present in match stick.

EASY
IMPORTANT

Name the chemical substances that are used in the preparation of matchstick.

MEDIUM
IMPORTANT

A safety match has the following in its head:

MEDIUM
IMPORTANT

Explain how match sticks produce fire.

EASY
IMPORTANT

Which of the following are sustainable energy sources?

EASY
IMPORTANT

Convert 2.5×105 J to nearest integer in kilojoules.

MEDIUM
IMPORTANT

Lightning results in the formation of which ions?

EASY
IMPORTANT

Earlier match stick was used to make fire.