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Published on: 10/09/2019
Chemistry in Everyday Life
Download Tamil Nadu 6th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Natural adhesives are made from ________.
Protein
fat
starch
vitamins
2.
Phenol is ______.
carbolic acid
acetic acid
benzoic acid
hydrochloric acid
3.
Gypsum is added to the cement for_______.
fast setting
delayed setting
hardening
making paste
4.
The saponification of a fat or oil is done using _______________ solution for hot process.
Potassium hydroxide
Sodium hydroxide
Hydrochloric acid
Sodium chloride
5.
Soaps were originally made from___________ .
proteins
animal fats and vegetable oils
chemicals extracted from the soil
foam booster
6.
_________ is an example for natural adhesive.
7.
___________ fertilizer is ecofriendly.
8.
____________ is called as farmer’s best friend.
9.
Water, coconut oil and __________ are necessary for soap preparation.
10.
_________ gas causes tears in our eyes while cutting onions.
11.
Explain the uses of plaster of paris.
12.
Mention any three physical properties of phenol.
13.
Give an example for inorganic fertilizer.
14.
What are uses of Gypsum?
15.
Explain the process of manufacturing cement.
16.
Why earthworm is called as farmer’s friend?
17.
How are detergents manufactured?
1.
(c)
starch
2.
(a)
carbolic acid
3.
(b)
delayed setting
4.
(b)
Sodium hydroxide
5.
(b)
animal fats and vegetable oils
6.
( )
Starch
7.
( )
Natural (Organic)
8.
( )
Earthworm
9.
( )
Sodium hydroxide
10.
( )
Propane thiols oxide
11.
i) In making black board chalks.
ii) In surgery for setting fractured bones.
iii) For making casts for statues and toys etc.
iv) In construction industry.
12.
i) It is a weak acid.
ii) It is a volatile white crystalline powder.
iii) It is colourless. But changes to red in the presence of dust.
13.
Urea, super phosphate, Ammonium sulphate and potassium nitrate.
14.
i) Used as fertilizers.
ii) Used in the process of making cement.
iii) In the process of making Plaster of Paris.
15.
Cement is manufactured by crushing of naturally occurring minerals such as lime, clay and gypsum.
16.
(i) Earthworms take organic wastes as food and produce compost castings.
(ii) They improve the soil health and consequently plant health.
(iii) Because of the multitude of services, Earthworms are known as Farmer's friend.
17.
Aim: Soap manufacturing.
Requirements:
i) 35 ml of water.
ii) 10 ml of NaOH.
iii) 60 ml of coconut oil.
Procedure:
i) Cover your work area with old newspaper.
ii) Take 35 ml of water in a jar.
iii) Add 10 gram of concentrated NaOH and allow it to cool.
iv) Then add 60 ml of coconut oil drop by drop and stir it well.
v) On getting dried, soap can be obtained.
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Tamilnadu Stateboard 6th Standard Subjects
Tamilnadu Stateboard Standards
