The nucleus of an atom of every element will always contain____________________?
A. neutrons
B. protons and electrons
C. protons
D. protons and neutrons
Submitted by :- Jamil Ahmed
mnsoomro
Which of the following methods is used to estimate hydrogen in an organic compound ?
A. Combustion method
B. Dumas method
C. Kjeldahls method
D. All of the above methods are for different purposes
Submitted by :- Jamil Ahmed
Isotopes differ in_________________?
A. properties which depend upon mass
B. arrangement of electrons in orbitals
C. chemical properties
D. all of the above
Submitted by :- Jamil Ahmed
Qualitative analysis is carried out for _________________?
A. identification of elements
B. estimation of amounts of elements
C. molar ration of elements
D. molar volume of elements
Submitted by :- Jamil Ahmed
Which of the following statements is wrong about isotopes ?
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
Submitted by :- Jamil Ahmed
Which of the following properties prove that cathode rays are material in nature_________________?
A. they cast shadow
B. they possess momentum
C. they are negatively charged
D. all of the above
Submitted by :- Jamil Ahmed
Paramagnetic behavior of substance is measured by a balance called___________________?
A. Analytical balance
B. Guoys balance
C. Electrical balance
D. Single beam balance
Submitted by :- Jamil Ahmed
Metallic crystals are soluble in________________?
A. Polar solvent
B. Non polar solvent
C. Fused metal
D. None
Submitted by :- Jamil Ahmed
Which of the following solids show anisotropy___________________?
A. Plastic
B. Glass
C. Rubber
D. None of the above
Submitted by :- Jamil Ahmed
Which of the following is not characteristics of reversible reaction__________________?
A. whole amount of reactant does not change into product
B. chemical equilibrium is established
C. a catalyst changes the direction of reaction
D. rate of forward reaction decreases as reaction proceeds
Submitted by :- Jamil Ahmed