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Free download in PDF Class 11 Chemistry Chapter 10 S Block Elements Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Usually CaCl2 is preferred over NaCl for cleaning snow on roads particularly in very cold countries this is because
[A]
NaCl makes the road slippery but CaCl2 doesnot
[B]
CaCl2 is hygroscopic but NaCl is not
[C]
CaCl2 is less soluble in H2O than NaCl
[D]
eutectic mixtue of CaCl/H2O freezes at -55°C while that of NaCl/H2O freezes at -18°C
Answer: eutectic mixtue of CaCl/H2O freezes at -55°C while that of NaCl/H2O freezes at -18°C
(2)
The wire of flash bulb is made up of:
[A]
Mg
[B]
Ag
[C]
Cu
[D]
Ba
(3)
Which of the following metals is not manufactured by electrolysis?
[A]
Na
[B]
Mg
[C]
Al
[D]
Fe
(4)
CsOH is
[A]
Strongly basic
[B]
Weakly basic
[C]
Slightly acidic
[D]
Amphoteric.
(5)
The salt that is added to table salt to make it flow freely in rainy season is
[A]
KCl
[B]
KI
[C]
Ca3(PO4)2
[D]
Na3PO4
(6)
What happens when Calcium carbonate is heated to 1200 K?
[A]
Carbon Monoxide
[B]
Calcium hydroxide
[C]
Calcium Oxide
[D]
Both (2) and (3) are correct
Answer: Both (2) and (3) are correct
(7)
Milk of lime reacts with chlorine to form ________, a constituent of bleaching powder.
[A]
Ca(OCI)2
[B]
Ca(CIO2)2
[C]
Ca(CIO3)2
[D]
Ca(CIO4)2
(8)
The hydration energy of Mg2+ is larger than that of
[A]
A13+
[B]
Na+
[C]
Be26
[D]
Mg3+
(9)
The basic strength of which hydroxide is maximum
[A]
LiOH
[B]
NaOH
[C]
Ca(OH)2
[D]
KOH.
(10)
Which of the following alkali metals has the least melting point?
[A]
Na
[B]
K
[C]
Rb
[D]
Cs.
(11)
The composition of Sorels cement is
[A]
KCl × MgCl2× 6H2O
[B]
MgCl2 × 5MgO × (xH2O)
[C]
MgCO3 × CaCO3
[D]
CaSO4 × 2H2O
Answer: MgCl2 × 5MgO × (xH2O)
(12)
The basic strength of which hydroxide is maximum
[A]
LiOH
[B]
NaOH
[C]
Ca (OH)2
[D]
KOH.
(13)
The wire of flash bulb is made up of:
[A]
Mg
[B]
Ag
[C]
Cu
[D]
Ba
(14)
Carnallite is the mineral of:
[A]
Na
[B]
Ca
[C]
Mg
[D]
None of the Above
(15)
The substance not likely to contain CaCO3 is
[A]
Dolomite
[B]
A marble statue
[C]
Calcined gypsum
[D]
Sea shells.
(16)
In curing cement plasters, water is sprinkled from time to time. This helps in
[A]
Converting sand into silicic acid
[B]
Keeping it cool
[C]
Developing interlocking needle like crystals of hydrated silicates
[D]
Hydrating sand and gravel mixed with cement.
Answer: Developing interlocking needle like crystals of hydrated silicates
(17)
What are Oxo-Acids?
[A]
Acid containing Oxygen
[B]
Acid containing Sulphur
[C]
Acid containing Carbon
[D]
None of the Above
Answer: Acid containing Oxygen
(18)
Alkali metals give a _________________when dissolved in liquid ammonia
[A]
Deep blue solution
[B]
Colourless
[C]
Red colour
[D]
None of the Above
Answer: Deep blue solution
(19)
Solvays process is used for the manufacture of :
[A]
NaOH
[B]
(Na2CO3. 10H2O)
[C]
K2CO3
[D]
Na2O2
(20)
CsOH is
[A]
Strongly basic
[B]
Weakly basic
[C]
Slightly acidic
[D]
Amphoteric.
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