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Acid, Base & Salt

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Santanu Roy

Baking powder is
(a) a mixture (b) a compound
(c) an element (d) a salt

Amartya maity

A mixture

Santanu Roy

Acids and bases are important because of
(a) their use in industry
(b) their effects on human health
(c) their effect on farmer’s crop
(d) all the above are correct.

Amartya maity

All the above

Santanu Roy

Select the one that is having pH < 7.
(a) lime juice (b) lime water
(c) human blood (d) antacid

ANANYA SARKAR

) lime juice (b) lime water 2toi to acidic

Santanu Roy

(a) Lime juice hbe… lime water ph 12.4 er ase pase.. kichu reference pele diye dio

ANANYA SARKAR

Sharp flavour of Coca Cola or any other soft drink is because of the presence of-
Hydrochloric acid / oxalic acid / phosphoric acid /none

Amartya maity

None

Santanu Roy

none

ANANYA SARKAR

Phosphoric acid

Santanu Roy

ok

ANANYA SARKAR

Sour Milk or curd or dahi is produced in the presence of-
Maleic acid / oxalic acid / lactic acid / acetic acid

Santanu Roy

lactic acid

ANANYA SARKAR

Consider the following-bases turn Litmus to blue / methyl orange to yellow/ have a bitter taste /all of the above

Santanu Roy

all of the above are true

ANANYA SARKAR

Non metallic oxides are acidic in nature-
True / false

Santanu Roy

True

Santanu Roy

Which of the following is not required to find the pH of a
given sample ?
(a) pH paper (b) Litmus paper
(c) Universal indicator (d) Standard pH chart

ANANYA SARKAR

Litmus paper?

Santanu Roy

yes

ANANYA SARKAR

Aqua regia is the solution of- HNO3+conc.HCL/NH3+conc.HCL/HCL+conc.HNO3/none

Santanu Roy

HNO3+conc.HCL

ANANYA SARKAR

HCL+conc.HNO3

Amartya maity

Con.HNO3+con.HCL

Santanu Roy

Which of the following is an alkali ?
(a) Ca(OH)2 (b) KOH
(c) Mg(OH)2 (d) CaCO3

ANANYA SARKAR

Caco3

Amartya maity

Bakigulo keno hobe Na….

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