For car battery which one is correct statement ? 

(A) Cathode is Lead dioxide (PbO₂) and anode is Lead (Pb) 

(B) Cathode is Lead dioxide (PbO₂) and anode is Copper (Cu) 

(C) Cathode is Copper (Cu) and anode is Lead dioxide (PbO₂) 

(D) Cathode is Copper (Cu) and anode is Lead (Pb)

CH₃MgI will give methane with 

(A) C₂H₅OH 

(B) CH₃–CH₂–NH₂

(C) both of these (A and B) 

(D) None of these

Lowering of vapour pressure is highest for 

(a) 0.1 M BaCl₂ 

(b) 0.1 M glucose 

(c) 0.1 M MgSO₄ 

(d) urea

The IUPAC name of the compound CH₃–CH(CH₃)–CO–CH₃ is 

(A) 3-methyl-2-butanone 

(B) 2-methyl-3-butanone 

(C) Isopropyl methyl ketone 

(D) 2ethyl-2methyl pentane

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

The number of solutions of the system of equations 2x + y – z = 7, x – 3y + 2z = 1 and x + 4y – 3z = 5 is

(a) 0 

(b) 1

(c) 2 

(d) 3

The point on the line 4x + 3y = 5, which is equidistant from (1, 2) and (3, 4), is

(a) (7,-4) 

(b) (-10,15)

(c) (1/7, 8/7)

(d) (0, 5/4)

If the point (α, α) lies between the lines  |2x  + y| = 5 then select one of the most appropriate option:

(A)  |α| < 5/2

(B)  |α| < 5/3

(C)  |α| < 7/2

(D)  |α| < 11/3 

SO₂ is considered as airpollutant because 

(A) its concentration increases with temperature increase of atmosphere. 

(B) It is used as insecticide which is airpollutant 

(C) It reacts with O₂ and H₂O to produce acid rain

At Critical Micell Concentration (CMC), the surfactant molecules: 

(A) decompose 

(B) dissociate 

(C) associate 

(D) become completely soluble