Jest Chemistry
1 / 50
Which of the following ion formation is always exothermic ?
2 / 50
Dempsters mass spectrometer has number of zones / parts_________________?
3 / 50
Which of the following methods is used to estimate hydrogen in an organic compound ?
4 / 50
For which of the following compounds the term empirical formula cannot be applied ?
5 / 50
Which of the following statements is wrong about isotopes ?
6 / 50
When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?
7 / 50
Which of the following are isoelectronic species ?
8 / 50
All of the following substances are crystalline except_____________?
9 / 50
The radioactive isotope of hydrogen is called___________?
10 / 50
Covalent network crystals have_____________?
11 / 50
The soul of chemistry is dealing with___________?
12 / 50
Mostly elements have fractional atomic masses because of______________________?
13 / 50
When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen__________________?
14 / 50
Which one is true about isotope ?
15 / 50
The volume occupied by 2.8 g of N2 at STP______________________?
16 / 50
Which of the following terms is not used for ionic compound ?
17 / 50
The number of moles of CO2 which contains 16 g of oxygen is__________________?
18 / 50
Which one of the following has the maximum number of isotopes ?
19 / 50
Qualitative analysis is carried out for _________________?
20 / 50
Which of the following statements about isotopes is correct ?
21 / 50
The number of peaks obtained in mass spectrometry shows____________________?
22 / 50
Sodium carbonate is produced by____________?
23 / 50
Which of the following is not a macromolecule ?
24 / 50
moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________?
25 / 50
Percentage of calcium in calcium carbonate is___________________?
26 / 50
Size of molecule depends upon________________?
27 / 50
The mass of decimole of electrons (NA) is___________________?
28 / 50
Diameter of an atom is in the order of________________?
29 / 50
How many isotopes have odd atomic number ?
30 / 50
What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called?
31 / 50
Combustion analysis is performed to determine__________________?
32 / 50
Which of the following is a substance?
33 / 50
The nucleus of an atom of every element will always contain____________________?
34 / 50
Which of the following terms is used for the mass of chlorine 35.5 ?
35 / 50
1 a.m.u =__________________?
36 / 50
All the following variables are used to describle gases except__________________?
37 / 50
Isotopes differ in_________________?
38 / 50
The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer_________________?
39 / 50
Which one of the following is not the mono isotopic element ?
40 / 50
The properties of an element mosly corresponds to that isotope which has greater_________________?
41 / 50
Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________?
42 / 50
Electron was discovered by?
43 / 50
Empirical formula of chloroform is____________________?
44 / 50
Avogadros number may represent_________________?
45 / 50
The number of isotopes of elements with even mass number and even atomic number are ________________?
46 / 50
Molecular mass of water (18g) means__________________?
47 / 50
Molecular ions are formed by passing______________________?
48 / 50
Isotopes of the same elements has__________________?
49 / 50
Mass spectrometer is used to determine Mass number of isotopes and___________________?
50 / 50
One mole of CO2 contains?
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