Match the Columns: Column A Column B 1. Curd A. Weak base 2. Ammonium hydroxide B. Hydroxides of Al and Mg 3. Antacid C. Formic acid 4. Ant sting D. Weak base 5. Aluminium hydroxide E. Lactic acid

1. The acid present in curd is lactic acid. Curd forms due to the chemical reaction between lactic acid bacteria and milk protein casein. 2. Ammonium hydroxide is a weak base because it does not dissociate completely into ions. 3. Hydroxides of Al and Mg are known as antacids used together to relieve heartburn, acid indigestion and upset stomach. 4. The acid which ants produce is called formic acid. The chemical formula of formic acid is HCOOH . It is an anti injects acid it causes a burning sensation. 5. Aluminium hydroxide is a weak base because it does not dissociate completely into ions. Column A Column B 1. Curd E. Lactic acid 2. Ammonium hydroxide A. Weak base 3. Antacid B. Hydroxides of Al and Mg 4. Ant sting C. Formic acid 5. Aluminium hydroxide D. Weak base

E M B I B E

Science 7>Chapter 5 - Acids, Bases and Salts>FORMATIVE & SUMMATIVE ASSESSMENTS

S K Jain and Shailesh K Jain Solutions for Chapter: Acids, Bases and Salts, Exercise 6: FORMATIVE & SUMMATIVE ASSESSMENTS

Author:S K Jain & Shailesh K Jain

S K Jain Science Solutions for Exercise - S K Jain and Shailesh K Jain Solutions for Chapter: Acids, Bases and Salts, Exercise 6: FORMATIVE & SUMMATIVE ASSESSMENTS

Attempt the practice questions on Chapter 5: Acids, Bases and Salts, Exercise 6: FORMATIVE & SUMMATIVE ASSESSMENTS with hints and solutions to strengthen your understanding. Science 7 solutions are prepared by Experienced Embibe Experts.

Questions from S K Jain and Shailesh K Jain Solutions for Chapter: Acids, Bases and Salts, Exercise 6: FORMATIVE & SUMMATIVE ASSESSMENTS with Hints & Solutions

EASY

7th CBSE

IMPORTANT

Science 7>Chapter 5 - Acids, Bases and Salts>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 1

The acid present in curd/ sour milk is

EASY

7th CBSE

IMPORTANT

Science 7>Chapter 5 - Acids, Bases and Salts>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 2

The substance which turns blue litmus red is

MEDIUM

7th CBSE

IMPORTANT

Science 7>Chapter 5 - Acids, Bases and Salts>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 3

A base

MEDIUM

7th CBSE

IMPORTANT

Science 7>Chapter 5 - Acids, Bases and Salts>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 4

Baking soda turns

MEDIUM

7th CBSE

IMPORTANT

Science 7>Chapter 5 - Acids, Bases and Salts>FORMATIVE & SUMMATIVE ASSESSMENTS>Q 5

China rose indicator turns green with the addition of a solution. The solution is

HARD

7th CBSE

IMPORTANT

Science 7>Chapter 5 - Acids, Bases and Salts>FORMATIVE & SUMMATIVE ASSESSMENTS>MATCH THE COLUMNS

Match the Columns:

Column A	Column B
1. Curd	A. Weak base
2. Ammonium hydroxide	B. Hydroxides of $Al$ and $Mg$
3. Antacid	C. Formic acid
4. Ant sting	D. Weak base
5. Aluminium hydroxide	E. Lactic acid