A. Molecules become more disordered
B. K.E of the molecules decreases
C. Intermolecular forces become weaker
D. Molecule become further separated
✅ The correct answer is option B.
Chemistry MCQs
The word Alkali means
A. Base
B. Basic salt
C. Ashes
D. Spirit
✅ The correct answer is option C.
Unit of heat in the SI system is
A. J
B. KCaL
C. Cal
D. GJ
✅ The correct answer is option A.
When the atoms of the third layer are arranged in such a way that they directly lie above the atoms of the first layer then this arrangement is called
A. ABAB (hexagonal)
B. ABCABC (Cubic)
C. Orthorhombic
D. Rhombohedral
✅ The correct answer is option A.
The formula of Chile saltpetre is
A. NaNO3
B. CaCO3
C. Ba (NO3)2
D. NH4Cl
✅ The correct answer is option A.
Anything which depends upon the initial and final state of a system is
A. Environment
B. Surrounding
C. State function
D. Enthalpy
✅ The correct answer is option C.
In order to mention the boiling point of water at 110?C the external pressure should be
A. Between 760 torr and 1200 torr
B. Between 200 torr and 760 torr
C. 765 torr
D. any value of pressure
✅ The correct answer is option A.
The elements which are very abundant in earth crust are
A. Si & AI
B. Ca & Mg
C. B & AI
D. All
✅ The correct answer is option A.
The total energy of a system is
A. P.E + K.E
B. P.E + heat energy
C. K.E + heat energy
D. P.E + mechanical energy
✅ The correct answer is option A.
Which one is false for evaporation?
A. Surface phenomenon
B. Continuous
C. Exothermic
D. Cause cooling
✅ The correct answer is option C.