E0(Ni₂₊/Ni)=−0.25volt,  E0(Au³⁺/Au)=1.50volt . The standard emf of the voltaic cell. Ni(s)|Ni²⁺(aq)(1.0M)|| Au³⁺(aq)(1.0M)|Au(s)Ni(s)|Ni(aq)2+(1.0M)||Au(aq)³⁺(1.0M)|Au(s) is:

1) 1.25  volt
2) - 1.75 volt
3) 1.75 volt
4) 4.0 volt

If the dispersed phase is liquid and the dispersion medium is solid, the colloid is known as a/an :
 1) sol
 2) emulsion
 3) gel
 4) foam

Which of the following compounds shall not produced propene by reaction with HBr followed by elimination of direct only elimination reaction ?

1) H₂C=C=O
2) 
3)
4)

Addition of bromine to trans-but-2-ene is

1) syn-addition

2) anti-addition

3) both

4) none

X on treatment with sodium hydroxide followed by the addition of silver nitrate gives white precipitate at room temp, which are soluble in NH₄OH. X can be

1)  Vinyl chloride

2)  Benzyl chloride

3)  Ethyl bromide

4)  Chloro benzene

Among the following, which are ambidentate ligands?
(i) SCN⁻
(ii) $$NO^-_3$$
(iii) $$NO^-_2$$
(iv) $$C_2O^{2-}_4$$

1) (i) and (iii)
2) (i) and (iv)
3) (ii) and (iii)
4) (ii) and (iv)

In benzene, all the six C-C bonds have the same length because of :

1) Isomerism
2) chain isomerism
3) resonance
4) hybridisation.

Sodium metal cannot be stored in

1)  toluene

2)  alcohol

3)  kerosene

4)  benzene

Which of the following statements is not applicable to chemisorption?

1) It is irreversible
2) It is independent of temperature
3) It is highly specific
4) It is slow.

Oil refineries, paper factories, textile and sugar mills, chemical factories are responsible for water pollution.These industries discharge harmful chemicals into revers and streams, and pollute water. The chemicals released include

1) arsenic

2) lead

3) fluorides

4) all of the above