SOME BASIC CONCEPTS OF CHEMISTRY Quiz-5

 

SOME BASIC CONCEPTS OF CHEMISTRY Quiz-5

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.

 :

•  1.2×10^23
•  0.12×10^23
•  0.18×10^23
•  1.8×10^23

Solution

Q2.White ppt of A on reaction with aq NH_3 are blackened. Select correct statement about A

•  A is also called calomel
•  A reacts with aq NH_3 forming HgNH_2 Cl
•  A changes to grey on reaction with SnCl_2
•  All of the above are correct statements

Solution
option d

Q3.What volume of 0.05 M K_2 Cr_2 O_7 in acidic medium is needed for complete oxidation of 200 mL of 0.06 M FeC_2 O_4 solution? 

•  1.2 mL
•  1.2 L
•  120 mL
•  800 mL

Solution

Q4.PbO_2 oxidises MnO_2 (black) to 

•  

  
  

•  

  
  

•  

  
  

•  

   

Solution

Q5.H_2 S would separate the following at pH<7

•  

   

•  

   

•  

  
  

•  

  
  

Solution
 

Q6.

•  0.56
•  5.6
• 0.1
•  10.0

Solution

Q7.Two substances I and II of carbon and oxygen have respectively 72.73% and 47.06% oxygen. Hence, they follow

•  Law of multiple proportion
•  Law of reciprocal proportion
•  Law of definite proportion
•  Law of conservation of mass

Solution

Q8.Consider a titration of potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as indicator. The number of moles of Mohr’s salt required per mole of dichromate is

•  3
•  4
•  5
•  6

Solution

 

Q9. A sample of copper sulphate pentahydrate contains 3.782 g of Cu. How many grams of oxygen are in the sample?

•  0.952 g
•  3.809 g
•  4.761 g
•  8.576 g

Solution

Q10. 4.4 g of CO_2 contains how many litres of CO_2 at STP?f 

•  2.4 L
•  2.24 L
•  44 L
• 22.4 L

Solution