CBSE Class 10 Chemistry Acids Bases And Salts Worksheet Set 07

Question. Which colour appears when few drops of phenolphthalein put into test tube contains lime water?
(A) Yellow
(B) Orange
(C) Pink
(D) Colourless
Answer : C

 

Question. The compound used for removal of acidity in stomach is : 
(A) NaCl
(B) MgCl₂
(C) Mg(OH)₂
(D) CaCl₂
Answer : C

Question. Which one of the following is not an acidic salt ?
(A) NaHSO₄
(B) NaH₂PO₄
(C) Na₃PO₄
(D) Na₂HPO₄
Answer : C

 

Question. Which among the following is the most abundant metal found in the earth’s crust?
(a) Magnesium
(b) Aluminium
(c) Oxygen
(d) Iron
Answer: B

Question.. Which of the following pairs of reactants will go undergo a displacement reaction?
(a) CuSO₄ + Fe
(b) ZnSO₄ + Fe
(c) MgSO₄ + Fe
(d) Ca(SO₄)₂ + Fe
Answer: A

Question. Which of the following alloys contains a non-metal as one of its constituents?
(a) Steel
(b) Brass
(c) Amalgam
(d) Bronze
Answer: A

Question. The pH of caustic soda solution containing 2 gm/litre caustic soda will be :
(A) 11.9
(B) 9.7
(C) 10.8
(D) 12.7
Answer : D

Question. Which of the following contain seven molecule of water of crystallization?
(A) Epsom Salt
(B) Green Vitriol
(C) Blue vitriol
(D) White vitriol
Answer : A, B, C

Question. Products obtained on electrolysis of brine are: 
(A) NaHCO₃, H₂, Cl₂
(B) H₂, NaOH, NaHCO₃
(C) Cl₂, NaOH, Na₂O₂
(D) NaOH, H₂, Cl₂
Answer : D

 

Question. The chemical formula of Plaster of Paris is 
(A) CaSO₄
(B) CaSO₄. 2H₂O
(C) CaSO₄ . ½ H₂O
(D) CaSO₄ . H₂O
Answer : C

Question. Concentration of hydrogen and hydroxyl ions in mole/litre for pure water is :
(A) 1 × 10^–7
(B) 2 × 10^–7
(C) 1 × 10^–14
(D) 1 × 10^–6
Answer : A

 

Question. The chemical formula of dead burnt plaster is :
(A) CaSO₄.1/2 H₂O
(B) CaSO₄.2H₂O
(C) CaSO₄.H₂O
(D) CaSO₄
Answer : D

Question. Which one of the following is complex salt ?
(A) Ca(OCl)Cl
(B) Pb(OH)NO₃
(C) K₂[HgI₄]
(D) Ca[H₂PO₂]₂
Answer : C

Question. Galvanisation is a method of protecting steel and iron from rusting by coating them with a thin layer of
(a) Copper
(b) Aluminum
(c) Zinc
(d) Bauxite
Answer: C

Question. Aqueous solution of CsO₂ is:
(A) Basic
(B) Neutral
(C) Acidic
(D) Amphoteric
Answer : A

Question. A student added a drop of universal indicator to 1.00mL of given solution and found that a green colour is produced. The pH value of the solution will be:
(A) 7 – 9
(B) 0 – 9
(C) 10 – 12
(D) 4 – 6
Answer : A

Question. The H⁺ ion concentration of a solution is 2 ×10_-8 mol L^-1. The pH value of the solution is-
(A) 7.699
(B) 7.599
(C) 7.799
(D) 7.899
Answer : A

Question. Complex salt is 
(A) Zinc Sulphate
(B) Sodium hydrogen Sulphate
(C) Iron ammonium Sulphate
(D) Tetraamine Copper (II) Sulphate
Answer : D

Question. Read the following statements.
Statement – I : Plaster of Paris is stored in moisture proof containers.
Statement – II : Plaster of Paris on reaction with water changes into a hard solid gypsum.
Select the correct answer from the options given below:
(A) Statement – I is true, Statement – II is false.
(B) Statement – I is false, Statement – II false.
(C) Both statements are true and statement – II provides explanation to statement – I
(D) Both Statements are true but statement – II does not provide explanation to Statement – I.
Answer : C

 

Question. Find the incorrect pair :
(A) Ammonium hydroxide-removes grease stains from clothes.
(B) Calcium Hydroxide-white washing of building
(C) Sodium hydroxide-Manufacture of soap
(D) Magnesium Hydroxide-manufacture of fertilizers
Answer : A

Question. Which of the following indicators is not an acid-base indicator ? 
(A) Phenolphthalein
(B) Vanilla
(C) Litmus
(D) Methyl orange
Answer : B

Question. The non-metal which is liquid at room temperature is:
a) Mercury
b) Bromine
c) Carbon
d) Helium
Answer: B

Question. The number of protons in an atom of an element A is 19 then, the number of electron in its ion A+ is:
a) 18
b) 19
c) 20
d) 21
Answer: A

Question. The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as
a) Roasting
b) Smelting
c) Calcination
d) Refining
Answer: A

Question. In electrolytic refining, the cathode is made up of
a) Pure metal
b) Impure metal
c) Alloy
d) Metallic salt
Answer: A

Question. Which of the following represent the correct order of decreasing reactivity?
a) Mg > Al > Zn > Fe
b) Mg > Zn > Al > Fe
c) Al > Zn > Fe > Mg
d) Mg > Fe > Zn > Al
Answer: A

Question. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
(a) Ca
(b) C
(c) Si
(d) Fe
Answer: A

 

Question. Bauxite is an ore of
a) Iron
b) Aluminium
c) Mercury
d) Copper
Answer: B

Question. The metal which is liquid at room temperature is
a) Bromine
b) Mercury
c) Iodine
d) Potassium
Answer: B

Question. Which of the following pairs will give displacement reactions?
(a) NaCl solution and copper metal
(b) MgCl₂ solution and aluminium metal
(c) FeSO₄ solution and silver metal
(d) AgNO₃ solution and copper metal
Answer: D

Question. An element X is soft and can be cut with the help of a knife. It is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following:
(a) Mg
(b) Na
(c) P
(d) Ca
Answer: B

Question. Zinc and HCl react to form
(A) H₂
(B) N₂
(C) CO₂
(D) He
Answer : A

Question. The chemical formula of Gypsum is:
(A) CaCO₃ . 5H₂O
(B) CaSO₄ . 2H₂O
(C) CaSO₄ . 21 H₂O
(D) CaCO₃ . 21 H₂O
Answer : B

 

Please click on below link to download CBSE Class 10 Chemistry Acids Bases And Salts Worksheet Set G