Question

(05)
અ.નિ. જોયેલા કે સાંભળેલા પદાર્થો, સ્થળો અને વસ્તુઓનું વર્ણન કરી શકે છે.
પ્રશ્ન:-2 ઉદાહરણ પ્રમાણે આપેલ શબ્દ સાથે જોડાયેલ શબ્દો લખો.
ઉદા. વૃક્ષ - થડ, ડાળી, ફળ, પાન
કેપ્યુટર
2
બેક
3
OLLH
4
ԳԼԱՄԱ
5 બગીચો
કાકા છો તેની દેશો અને તમો નાં સમી સાંભળીને સમજી શકે છે​

Answer 1

Answer:

Tomato is a natural source of _____________ acid.

2) Brine is an aqueous solution of______________.

3) Lime water reacts with chlorine to give______________.

4) _____________ is the fixed number of water molecules chemically attached  

to each formula unit of a salt in its crystalline form.

5) Use of mild base like ____________on the bee-stung area gives relief.

6) The compound which is obtained from baking soda and is used to remove  

permanent hardness of water is ______________.

7) Soluble bases are called _____________.

8) Zinc reacts with sodium hydroxide_____________.

Answer these questions:

1) What happens when a solution of an acid is mixed with a solution of a base  

in a test tube?

2) Write the chemical formula of hydrated copper sulphate and anhydrous  

copper sulphate.

3) Why cake or bread becomes soft & spongy on adding baking powder? Write  

chemical equation.

4) Write the balanced chemical equation of chlor-alkali process.

5) In the following list of acids, separate strong acids from weak acids.

Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric  

acid.

6) A white coloured powder is used by doctors for supporting fractured bones.

a) Write chemical name and formula of the powder.

b) When this white powder is mixed with water a hard solid mass is obtained.  

Write balanced chemical equati