Options:
- A. 2
- B. 3
- C. 4
- D. 5
View Answer
C. 4
Chemistry
The mass of decimole of electrons (NA) is___________________?
Options:
- A. 1.008 mg
- B. 0.184 mg
- C. 0.054 mg
- D. 5.4 mg
View Answer
C. 0.054 mg
Metallic crystals are soluble in________________?
Options:
- A. Polar solvent
- B. Non polar solvent
- C. Fused metal
- D. None
View Answer
C. Fused metal
Which of the following statements is wrong about isotopes ?
Options:
- A. they possess different mass number
- B. they possess different physical properties
- C. they possess same chemical properties
- D. they possess different position in the periodic table
View Answer
D. they possess different position in the periodic table
Paramagnetic behaviour of substance is measured by a balance called___________________?
Options:
- A. Analytical balance
- B. Guoys balance
- C. Electrical balance
- D. Single beam balance
View Answer
B. Guoys balance
Qualitative analysis is carried out for _________________?
Options:
- A. identification of elements
- B. estimation of amounts of elements
- C. molar ration of elements
- D. molar volume of elements
View Answer
A. identification of elements
Combustion analysis is performed to determine__________________?
Options:
- A. Empirical formula
- B. Molecular mass
- C. Molecular formula
- D. Formula mass
View Answer
A. Empirical formula
Isotopes differ in_________________?
Options:
- A. properties which depend upon mass
- B. arrangement of electrons in orbitals
- C. chemical properties
- D. all of the above
View Answer
A. properties which depend upon mass
Which of the following methods is used to estimate hydrogen in an organic compound ?
Options:
- A. Combustion method
- B. Dumas method
- C. Kjeldahls method
- D. All of the above methods are for different purposes
View Answer
A. Combustion method
The nucleus of an atom of every element will always contain____________________?
Options:
- A. neutrons
- B. protons and electrons
- C. protons
- D. protons and neutrons
View Answer
C. protons