Considering entropy(s) as a thermodynamic parameter, the criterion for the spontaneity of any process the change in entropy is :

(A) (ΔS _system – ΔS _surrounding) > 0

(B) ΔS _system  > 0 only

(C) ΔS _surrounding > 0 only

(D) (ΔS _system + ΔS _surrounding ) >0

D – Glucose units in cellulose are joint by 

(A) α – 1, 4 glycosidic bond 

(B) β – 1, 6 glycosidic bond 

(C) β – 1, 4 glycosidic bond 

(D) Peptide bond

The Markonvikov’s rule is best applicable to the reaction

(A) C₂H₄ + HCl 

(B) C₃H₆ + Br₂ 

(C) C₃H₆ + HBr 

(D) C₃H₈ + Cl₂

Which among the following compounds will have meso form? 

(A) CH₂OH – CHOH – CHOH – CHO

(B) CH₂OH – CHOH – CHOH – COOH 

(C) CH₂OH – (CHOH)₂ – CH₂OH 

(D) C₆H₃ – CHCl – CHOH – CH₃

Zn converts from its melted state to its solid state, it has hcp structure, then the number of nearest atoms will be 

(A) 6 

(B) 8 

(C) 12 

(D) 4

A solution of D-glucose in water rotates the plane of polarised light 

(a) to the left 

(b) to the right 

(c) to either side 

(d) None of these.

CH₃MgI will give methane with 

(A) C₂H₅OH 

(B) CH₃–CH₂–NH₂

(C) both of these (A and B) 

(D) None of these

During the adiabatic expansion of 2 moles of an ideal gas, the increase in internal energy was found to be equal to (–200 J). The work done by the gas during the process will be equal to 

(A) 0 

(B) 400 J 

(C) –200 J 

(D) 200 J

Which of the following material is not ferromagnetic in nature ? 

(A) Al 

(B) Fe 

(C) Co 

(D) Ni

Cordite is a mixture of 

(A) nitroglycerine, guncotton and vaseline 

(B) borax, glycerine 

(C) carborundum and charcoal 

(D) glycerol and KMnO₄