SAT - Science - Chemistry - Acids,Bases and Salts

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Question - 1

Aqueous solutions of which of the following salts will change the colour of blue litmus to red?
i) KNO3
ii) (NH4)2SO4
iii) Na2CO3
 iv) NH4Cl

  • A (i) only·
  • B (ii) and (iii) only
  • C (ii) and (iv) only
  • D (i)' (ii) and (iv)

Question - 2

Which of the following salts reacts with alkali?

  • A Na2C03
  • B NaHCO3
  • C Na2S04
  • D KN03

Question - 3

Arrange the following compounds in increasing order of pH values.
i) Human blood
ii) 1 M HCl
iii) 1 M NaOH
iv) Lemon juice
v) Soft drinks

  • A ii< iv < v < i < iii
  • B iii < i < v < iv < ii
  • C ii < v < iv < i < iii
  • D ii < i < v < iv < iii

Question - 4

pH values of two solutions X and Y are 1 and 2 respectively. Which of the following statement is correct?

  • A Hydrogen ion concentration of X is less than that of Y
  • B Hydrogen ion concentration of X is more than that of Y
  • C Acidity of X is less than that of Y
  • D Y is stronger acid that X

Question - 5

Conductivity of an electrolyte depends on the number of ions per unit volume of the electrolyte. Which of the following electrolyte exhibits maximum conductivity?

  • A 1M KNO3
  • B 1M KCl
  • C 1M NaCI
  • D 1M Na2CO3

Question - 6

A metal carbonate (X) on thermal decomposition produces a solid residue and a gas (Y). When (Y) is passed through aqueons solution of another substance (Z) gives
back X. The compounds X, Y and Z respectively are

  • A Ca(OH)2, CaC03, CO2
  • B Ca(HCO3)2, Ca(OH)2,CaCO3
  • C CaCO3,CO2,Ca(OH)2
  • D CaCO3, CO2,Ca(HCO3)2

Question - 7

A gas (A) obtained at anode during the electrolysis of brine when passed through a substance (B) produces a compound (C) which is used for disinfecting drinking
water. A, B and C respectively are

  • A O2 , Ca(OH)2,CaOCl2
  • B H2, CaOCl2, Ca(OH)2
  • C Cl2, Ca(OH)2 , CaOCl2
  • D Cl2, CaOCl2, Ca(OH)2

Question - 8

Match the following:

List-I - Salt List-II - pH of
aqueous· solution
a. Na2SO4 1. pH> 7
b.NH4NO3 2. pH ≈ 7
C. KHCO3 3. pH = 7
d. (NH4)2 CO3 4. pH < 7
  • A a b c d 4 3 1 2
  • B a b c d 3 4 1 2
  • C a b c d 3 1 4 2
  • D a b c d 4 2 3 1

Question - 9

pH of a solution is 12. Identify the wrong statement about this solution.

  • A It changes colour of red litmus to blue
  • B It reacts with acids to form salt
  • C Hydrogen ion concentration is greater than hydroxyl ion concentration
  • D Hydrogen ion concentration is less than hydroxyl ion concentration

Question - 10

pOH values of four solutions A, B, C and D are 2, 8,13, 4 respectively. Arrange them in decreasing order of acidity.

  • A C>B>D>A
  • B A> D > B > C
  • C C>D>B>A
  • D C > A > B > D
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