s-block-quiz-2

S-Block Quiz-2

Dear Readers,

The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry..

Q1. Na₂ CO₃+Fe₂ O₃⟶A+CO₂;A is:

•  NaFeO₂
•  Na₃ FeO₃
•  Fe₃ O₄
•  Na₂ FeO₂

Solution
(a) Na₂ CO₃+Fe₂ O₃⟶2NaFeO₂  

Q2.The compound insoluble in acetic acid is:

•  Calcium oxide
•  Calcium carbonate
•  Calcium hydroxide
•  Calcium oxalate

Solution

(d) CaC₂ O₄ is insoluble in acetic acid.

Q3. When hydrated MgCl₂.6H₂ O is strongly heated: 

•  MgO is formed
•  Mg(OH)₂ is formed
•  Mg(OH)Cl is formed
•  Anhydrous MgCl₂ is formed

Solution
(a)MgO is formed

Q4. Mortar is a mixture of

•  Cement, sand and water
•  MgCl₂, tar and lime
•  Lime, Portland cement and water
•  None of the above

Solution
(a)Cement, sand and water

Q5.Which one of the following on hydrolysis, gives the corresponding metallic hydroxide, H₂ O₂ and O₂?

•  Li₂ O
•  Na₂ O₂
•  NaO₂
•  Na₂ O

Solution
 

Q6. When carbon monoxide is passed over solid caustic soda heated to 200℃, it forms

•  Na₂ CO₃
•  NaHCO₃
•  HCOONa
•  CH₃ COONa

Solution
 

Q7.NaOCl is used as a bleaching agent and sterilising agent. It can be synthesised by the action of

•  NaCl with H₂ O
•  NH₄ Cl with NaOH
•  Cl₂ with cold and dilute NaOH
•  Cl₂ with hot and concentrated NaOH

Solution

Q8.Among the following, which is water insoluble?

•  Sodium fluoride
•  Potassium fluoride
•  Beryllium fluoride
•  Magnesium fluoride

Solution
(d)Magnesium fluoride 

Q9.Carnallite is

•  MgCO₃ .CaCO₃
•  MgSO₄ .7H₂ O
•  KAlSi₃ O₈
•  KCl .MgCl₂ .6H₂ O

Solution

(d) Carnallite is an ore of potassium and magnesium i.e., KCl .MgCl₂ .6H₂ O.

Q10. The element that forms a solid basic oxide at room temperature is:

•  Mg
•  S
•  H
•  P

Solution

(a) Metal oxides are basic; non-metal oxides are acidic.