SOME BASIC CONCEPTS OF CHEMISTRY Quiz-30

Some basic concepts of chemistry Quiz-30

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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..

Q1.600 mL of ozonised oxygen at STP were found to weigh one gram. What is the volume of ozone in the ozonised oxygen?

•  200 mL
•  150 mL
•  100 mL
•  50 mL

Solution

Q2.1 g of X% H_2 O_2required x mL of KKMnO_4 solution in acidic medium.Thus, molarity of KMnO_4 solution is

•  0.12 M
•  0.60 M
•  0.024 M
•  None of correct

Solution

Q3. One mole of the salt NaHC_2 O_4.H_2 C_2 O_4contains

•  3 equivalents of H^+ and 4 equivalents of C_2 O_4^(2-)
•  1 equivalent each of H^+and C_2 O_4^(2-)
•  3 equivalents of H^+and 2 equivalents of C_2 O_4^(2-)
•  None of the above is correct

Solution

Q4. A balloon blown up has a volume of 300 mL at 27℃. The balloon is distended to 5/6 of its maximum stretching capacity. The maximum temperature above which it will burst is

•  77℃
•  67℃
•  57℃
•  87℃

Solution

Q5. Given, that the abundances of isotopes 54Fe, 56Fe and 57Fe are 5%,90% and 5%, respectively, the atomic mass of Fe is

•  55.85
•  55.95
•  55.75
•  56.05

Solution
 

Q6. If 100 mL of acidified 2N-H_2 O_2 is allowed to react with KMnO_4 solution till there is a light tinge of purple colour, the volume of oxygen produced at STP is

•  2.24 L
•  1.12 L
• 3.36 L
•  4.48 L

Solution

Q7. The nucleus of an atom consists of

•  Neutron
•  Proton
•  Electron
•  Both (a) and (b)

Solution

Q8. An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralize 10 mL of this solution is

•  40 mL
•  20 mL
•  10 mL
•  4 mL

Solution

Q9. Iodate ion, IO_3^-, oxidizes SO_3^(2-)to SO_4^(2-)in acidic medium. If 100 mL sample of solution containing 2.14 g of KIO_3 reacts with 60 mL of 0.5 M Na_2 SO_3 solution, then final oxidation state of iodine is

•  +5
•  +3
•  +1
•  -1

Solution

Q10. 0.5 mole of BaCl_2 is mixed with 0.2 mole of (NH_4 )_3 PO_4. Maximum number of moles of barium phosphate formed in this reaction is

•  0.1
•  0.2
•  0.3
• 0.5

Solution