SOME BASIC CONCEPTS OF CHEMISTRY Quiz-19

 

SOME BASIC CONCEPTS OF CHEMISTRY Quiz-19

Dear Readers,

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..

Q1.When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A,B,C and D, respectively are  :

•  Na,H_2,NaOH,Zn -
•  K,H_2,KOH,Al
•  CaH_2,Ca(OH)_2,Sn
•  CaC_2,C_2 H_2,Ca(OH)_2,Fe

Solution

Q2.The equivalent weight of phosphoric acid (H_3 PO_4 ) in the reaction NaOH+H_3 PO_4→NaH_2 PO_4+H_2 O is

•  59
•  49
•  25
•  98

Solution

Q3.Upon mixing 50.0 mL of 0.1 M lead nitrate solution with 50 mL of 0.05 M chromic sulphate solution, precipitation of lead sulphate solution takes place. How many moles of lead sulphate are formed and what is the molar concentration of chromic sulphate left in the solution?  

•  0.005, 0.0084
•  0.0084, 0.005
•  0.005, 0.00084
•  0.05, 0.00084

Solution

Q4.Which of the following reactions is not oxidation reduction?

•  H^⊕+OH^⊖→H_2 O
•  1/2 H_2+1/2 Cl_2→HCl
•  CaCO_3→CaO+CO_2
•  (a)and (c)

Solution

Q5.Marsh test is used for detecting

•  

  As

•  Zn
•  Al
•  CH_4

Solution
 option a

Q6.An iron sample contains 18% Fe_3 O_4.What is the amount so that it is precipitated as Fe_2 O_3 which weighs 0.40 g?

•  2.15 g
•  1.075 g
• 4.30 g
•  2.01 g

Solution

Q7.Sodium fusion extract, obtained from aniline, on treatment with iron (II) sulphate and H_2 SO_4, in presence of air gives a Prussian blue precipitate. The blue colour is due to the formation of

•  Fe_4 [Fe(CN)_6 ]_3
•  Fe_3 [Fe(CN)_6 ]_2
•  Fe_4 [Fe(CN)_6 ]_2
•  Fe[Fe(CN)_6 ]_3

Solution

Q8.10 mL of H_2 O_2 solution (volume strength=x) required 10 mLof N/0.56 MnO_4^( ⊖) solution in acidic medium. Hence, x is

•  0.56
•  5.6
•  0.1
•  10

Solution

Q9.The compound thioacetamide has been into analytical chemistry to replace which one of the following reagents?

•  H_2 S
•  DMG
•  YAS
•  (NH_4 )_2 C_2 O_4

Solution

 

Q10.What maximum amount of BaSO_4 gets precipitated if 0.5 mol of BaCl_2 is mixed with 1 mole of H_2 SO_4?  

•  0.5 mol
•  1.0 mol
•  1.5 mol
• 2.0 mol

Solution

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