SECTION - A

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Subject Experts Chemistry Solutions for Exercise - SECTION - A

Simple step-by-step solutions to SECTION - A questions of PREP TEST from Foundation Course Chemistry. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from SECTION - A with Hints & Solutions

MEDIUM
7th CBSE
IMPORTANT

Dorji has a few bottles of soft drink in his restaurant. But, unfortunately, these are not labelled. He has to serve the drinks on the demand of customers. One customer wants acidic drink, another wants basic and third one wants neutral drink. How will Dorji decide which drink is to be served to whom?

EASY
7th CBSE
IMPORTANT

‘Litmus’, a natural dye is an extract of which of the following?

EASY
7th CBSE
IMPORTANT

When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?

MEDIUM
7th CBSE
IMPORTANT

What is the chemical formula of rust?

EASY
7th CBSE
IMPORTANT

Name two natural indicators.

MEDIUM
7th CBSE
IMPORTANT

State at least four differences between acids and bases. 

HARD
7th CBSE
IMPORTANT

Identify the type of change and state whether energy is absorbed or evolved in each one of the following : 

Burning of a candle, Lighting of bulb, Preparation of food by green plants, Volcanic eruptions. 

EASY
7th CBSE
IMPORTANT

What are the products of neutralisation reaction?