Which one is false for evaporation ?
A. Surface phenomenon
B. Continuous
C. Exothermic
D. Cause cooling
Submitted by :- Jamil Ahmed
When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called_________________?
A. ABAB (hexagonal)
B. ABCABC (Cubic)
C. Orthor hombic
D. Rhombohedral
Submitted by :- Jamil Ahmed
Which has strongest bonding in the solid state ?
A. Hydrogen Chloride (HCI)
B. Chlorine (Cl2)
C. Xenon(Xe)
D. Sodium Chloride (NaCI)
Submitted by :- Jamil Ahmed
All the enthalpy changes are________________?
A. Negative
B. Positive
C. May or may not be A or B
D. none
Submitted by :- Jamil Ahmed
The pressure during the molar heat of fusion is kept________________?
A. atmosphere
B. one atmosphere
C. 2 atmosphere
D. 1 atmosphere
Submitted by :- Jamil Ahmed
Isomorphic substances have _______________?
A. Same physical and chemical properties
B. Same physical and different chemical properties
C. Different physical and same chemical properties
D. Different physical and chemical properties
Submitted by :- Jamil Ahmed
Bucky balls is an allotropic from of__________________?
A. Sulphur
B. Carbon
C. Silica
D. Tin
Submitted by :- Jamil Ahmed
The phenomenon in which a compound exists in two or more crystalline forms is called ________________?
A. Isomorphism
B. Polymorphism
C. Anisotropy
D. Allotropy
Submitted by :- Jamil Ahmed
Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it ?
A. Liquid do not have definite shape
B. Liquid do not have definite volume
C. Liquid is highly compressible
D. Liquid molecules can slide over each other
Submitted by :- Jamil Ahmed
The number of formula units in 29.25g of common salt_________________?
A. 6.22 x 10^23
B. 3.1 x 10^23
C. 2 x NA
D. 4 x 6.22 x 10^23
Submitted by :- Jamil Ahmed