Here, you will get Class 11 Chemistry MCQ of Chapter 10 The s-Block Elements for cracking JEE and NEET/AIIMS. By solving these MCQs of Class 11 Chemistry Chapter 10 The s-Block Elements, you will get the confidence to crack JEE or NEET. Practice MCQ Questions for Class 11 Chemistry with Answers on a daily basis and score well in exams.
The s-Block Elements Class 11 MCQs Questions with Answers
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: (c) Developing interlocking needle like crystals of hydrated silicates
The wire of flash bulb is made up of
(a) Mg
(b) Ag
(c) Cu
(d) Ba
Answer: (a) Mg
Solvays process is used for the manufacture of :
(a) NaOH
(b) (Na2CO3. 10H2O)
(c) K2CO3
(d) Na2O2
Answer: (b) (Na2CO3. 10H2O)
Carnallite is the mineral of
(a) Na
(b) Ca
(c) Mg
(d) None of the Above
Answer: (c) Mg
The correct order sequence of of the increasing covalent character is:
(a) LiCl < NaCl < BeCl2
(b) BeCl2 < LiCl < NaCl
(c) NaCl < LiCl < BeCl2
(d) BeCl2 < NaCl < LiCl
Answer: (c) NaCl < LiCl < BeCl2
The composition of Sorels cement is
(a) KCl × MgCl2× 6H2O
(b) MgCl2 × 5MgO × (xH2O)
(c) MgCO3 × CaCO3
(d) CaSO4 × 2H2O
Answer: (b) MgCl2 × 5MgO × (xH2O)
The hydration energy of Mg2+ is larger than that of
(a) A13+
(b) Na+
(c) Be26
(d) Mg3+
Answer: (b) Na+
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: (d) eutectic mixtue of CaCl/H2O freezes at -55°C while that of NaCl/H2O freezes at -18°C
The group 13 element that is liquid during summer and used for measuring high temperature is
(a) Gallium
(b) Boron
(c) Aluminium
(d) Indium
Answer: (a) Gallium
Which elements of s- block are largely found in biological fluids?
(a) Sodium, Potassium
(b) Magnesium and Calcium
(c) Both (a) and (b) are true
(d) None of the Above
Answer: (c) Both (a) and (b) are true
Which of the following substances can be used for drying gases?
(a) Calcium carbonate
(b) Sodium carbonate
(c) Sodium bicarbonate
(d) Calcium oxide
Answer: (d) Calcium oxide
Bleaching powder loses its power on keeping for a long time because
(a) It changes into calcium hypochlorite
(b) It changes into calcium chloride and calcium hydroxide
(c) It absorbs moisture
(d) It changes into calcium chloride and calcium chlorate
Answer: (d) It changes into calcium chloride and calcium chlorate
The alkaline earth metal present in chlorophyll is ———–
(a) Be
(b) Mg
(c) Se
(d) Ba
Answer: (b) Mg
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
Answer: (c) Ca3(PO4)2
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: (d) eutectic mixtue of CaCl/H2O freezes at -55°C while that of NaCl/H2O freezes at -18°C
Which of the following is not present in cement?
(a) Gypsum
(b) Clay
(c) Alumina
(d) Alum
Answer: (d) Alum
Which one is used as an air purifier in space craft?
(a) Quick lime
(b) Slaked lime
(c) Potassium superoxide
(d) Anhydrous CaCl2
Answer: (c) Potassium superoxide
Aluminium chloride is a/an
(a) Lewis acid
(b) Bronsted – Lowery acid
(c) Arhenius acid
(d) Lewis base
Answer: (a) Lewis acid
Which of the following metals is most commonly used in photo – chemical cells?
(a) Lithium
(b) Calcium
(c) Caesium
(d) Francium
Answer: (c) Caesium
When the washing soda is heated
(a) CO is released
(b) CO + CO2 is released
(c) CO2 is released
(d) water vapours are released
Answer: (d) water vapours are released
Which has the maximum electropositive character?
(a) Cu
(b) Cs
(c) Ba
(d) Cr
Answer: (b) Cs
Solubilities of carbonates decrease down the magnesium group due to decrease in
(a) Entropy of solution formation
(b) Lattice energies of solids
(c) Hydration energy of cations
(d) Inter – ionic attraction.
Answer: (c) Hydration energy of cations
Which one of the following has the lowest m.p.?
(a) Ga
(b) B
(c) Al
(d) Tl
Answer: (a) Ga
NaOH is prepared by the method
(a) Downs cell
(b) Castner cell
(c) Solvay process
(d) Castner – Kellner cell
Answer: (d) Castner – Kellner cell
The substance not likely to contain CaCO3 is
(a) Dolomite
(b) A marble
(c) Calcined gypsum
(d) Sea shells
Answer: (c) Calcined gypsum
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