SOME BASIC CONCEPTS OF CHEMISTRY Quiz-14

 

SOME BASIC CONCEPTS OF CHEMISTRY Quiz-14

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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.F_2 can be prepared by reacting hexfluoro mangante (IV) with antimony pentafluoride as: K_2 MnF_6+SbF_5 □(→┴(150℃ ) ) KSbF_6+MnF_3+F_2 The number of equivalent of K_2 MnF_6 required to react completely with one mol of SbF_5in the given reaction is  :

•  1.52
•  5.0
•  0.5
•  4.0

Solution

Q2.4I^⊖+Hg^(2+)→HgI_4^( 2-)

•  1 mol
•  0.5 mol
•  0.25 mol
•  2 mol

Solution

Q3.Ethyl alcohol is 46% by weight of solution. Hence, mole fraction of ethyl alcohol is  

•  0.46
•  0.54
•  0.75
•  0.25

Solution

Q4.In the following reaction, 3Ba(NO_3 )_2+2Na_3 PO_4→Ba_3 (PO_4 )_2+6NaNO_3 2 moles each of Ba(NO_3 )_2 and Na_3 PO_4 form Ba_3 (PO_4 )_2  

•  1 mol
•  1/3 mol
•  2/3 mol
•  4 mol

Solution

Q5.How many equivalents are there per mol of H_2 S in its oxidation to SO_2?

•  

  2

•  4
•  6
•  8

Solution
 

Q6.A mixture of two colourless substances was dissolved in water. When gaseous Cl_2 was passed through the solution, a deep brown colour developed. Addition of BaCl_2 or NaOH to the original solution give a white precipitate. The mixture contained

•  NaNO_3 and AlCl_3
•  NaBr and KCl
• MgI_2 and MgSO_4
•   BaSO_4 and PbCl_2

Solution

Q7.10 g mixture of NaHCO_3 and Na_2 CO_3 has 1.68 g NaHCO_3. It is heated at 400 K. Weight of the residue will be

•  9.38 g
•  8.32 g
•  10.0 g
•  1.68 ge

Solution

Q8.Mole fraction of ethanol in ethanol water mixture is 0.25. Hence, the percentage concentration of ethanol by weight of mixture is

•  25%
•  75%
•  46%
•  54%

Solution

Q9. 1 g CH_4 and 4 g of compound X have equal number of moles. Thus, molar mass of X is

•  16 g mol^(-1)
•  32 g mol^(-1)
•  4 g mol^(-1)
•  64 g mol^(-1)

Solution

Q10.0.116 g of C_4 H_4 O_4 (A) is neutralised by 0.074 g of Ca(OH)_2. Hence, protonic hydrogen (H^) in (A) will be  

•  1
•  2
•  3
• 4

Solution

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