Which of the following will give respective metal by self reduction?

(a)

Galena (Pbs)

(b)

HgS

(c)

ZnS

(d)

Both (a) & (b)

Magnetic separation it is based on the difference in the_________ of the ore and the impurities.

(a)

magnetic properties

(b)

chemical properties

(c)

physical properties

(d)

melting point

In diborane, the number of electrons that accounts for banana bonds is ________.

(a)

six

(b)

two

(c)

four

(d)

three

SiO₄^4- ion has ____ geometry.

(a)

Triangular

(b)

Tetrahedral

(c)

Linear

(d)

Pentagonal bipyramidal

Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.

(a)

P₄(red) & PH₃

(b)

P₄(white) & PH₃

(c)

S₈ & H₂S

(d)

P₄(white) & H₂S

The hybridisation and shape of SF₆ is respectively?

(a)

sp³d², square planar

(b)

sp³d², octahedral

(c)

sp³d see-saw

(d)

sp³d, trigonal bipyramindal

Among the transition metals of 3d series, the one that has highest negative \(\left( \frac { M^{ 2+ } }{ M } \right) \) standard electrode potential is _______.

(a)

Ti

(b)

Cu

(c)

Mn

(d)

Zn

Which one of the following exhibits highest oxidation state?

(a)

Ni

(b)

Mn

(c)

V

(d)

Zr

If the standard electrode potential (E^o) of a inetal is ________ and __________ the metal is a powerful reducing agent.

(a)

large, negative

(b)

large, positive

(c)

small, negative

(d)

small, positive

Oxidation state of Iron and the charge on the ligand NO in [Fe(H₂O)₅NO]SO₄ are_______.

(a)

+2 and 0 respectively

(b)

+3 and 0 respectively

(c)

+3 and -1 respectively

(d)

+1 and +1 respectively

Among the following complexes the one which shows zero crystal field stabilisation energy is _______.

(a)

[Mn(H₂O)₆]³⁺

(b)

[Fe(H₂O)₆]³⁺

(c)

[CO(H₂O)₆]²⁺

(d)

[CO(H₂O)₆]³⁺

Consider the following statements and identify the incorrect statement(s).
(i) CN^- is a powerful ligand.
(ii) Haemoglobin is a monomer and myoglobin is a tetramer.
(iii) Cis - Pt (NH₃)₂Cl₂ is an anti-tumor drug.

(a)

only (i)

(b)

only (ii) 

(c)

only (iii)

(d)

both (i) and (iii) 

The number of unit cells in 8 gm of an element X (atomic mass 40) which crystallizes in bcc pattern is (N_A is the Avogadro number)________.

(a)

6.023 x 10²³

(b)

6.023 x 10²²

(c)

60.23 x 10²³

(d)

\(\left( \frac { 6.023\times { 10 }^{ 23 } }{ 8\times 40 } \right) \)

What is the relation between diamond and graphite?

(a)

Polymorphous

(b)

Isomer

(c)

Isotope

(d)

Isomorphous

An element with atomic mass 60 having fee structure has a density of 6.23g/cm³. What is the edge length of unit cell?

(a)

200 Pm

(b)

300 Pm

(c)

400 Pm

(d)

500 Pm

If electrical conductivity is found to be same in all directions through a solid the substance is ________ solid and the property is called _________.

(a)

crystalline, isotropy

(b)

amorphous, isotropy

(c)

crystalline, anisotropy

(d)

amorphous, isotropy

Consider the following statements:
(i) increase in concentration of the reactant increases the rate of a zero order reaction.
(ii) rate constant k is equal to collision frequency A if E_a = 0
(iii) rate constant k is equal to collision frequency A if E_a = ∞
(iv) a plot of ln (k) vs T is a straight line.
(v) a plot of ln (k) vs \(\left( \frac { 1 }{ T } \right) \) is a straight line with a positive slope.
Correct statements are

(a)

(ii) only

(b)

(ii) and (iv)

(c)

(ii) and (v)

(d)

(i), (ii) and (v)

Which of these is not likely to act as Lewis base?

(a)

BF₃

(b)

PF₃

(c)

CO

(d)

F^–

HCl is a strong acid since _______.

(a)

It can be easily oxidised

(b)

It canbe easilyionised

(c)

It dissociates completely to give H⁺ ions in solution

(d)

It can be easily oxidised and It can be easilyionised

The cell constant of a conductivity cell is _______.

(a)

l x a

(b)

\(\frac{a}{l}\)

(c)

\(\frac{l}{a}\)

(d)

\(\frac{l^2}{a}\)

Oxidation takes place at _________ and reduction takes place at ________.

(a)

anode, cathode

(b)

cathode, anode

(c)

anode

(d)

cathode

Which one of the following is an example for homogeneous catalysis?

(a)

manufacture of ammonia by Haber’s process

(b)

manufacture of sulphuric acid by contact process

(c)

hydrogenation of oil

(d)

Hydrolysis of sucrose in presence of all HCl

In the reaction Ethanol \(\overset { { PCl }_{ 5 } }{ \longrightarrow } X\overset { alc.KOH }{ \longrightarrow } Y\overset { { H }_{ 2 }{ SO }_{ 4 }/{ H }_{ 2 }O }{ \underset { 298k }{ \longrightarrow } } Z.\) The ‘Z’ is ______.

(a)

ethane

(b)

ethoxyethane

(c)

ethylbisulphite

(d)

ethanol

Which one of the following will not undergo Hofmann bromamide reaction.

(a)

CH₃CONHCH₃

(b)

CH₃CH₂CONH₂

(c)

CH₃CONH₂

(d)

C₆H₅CONH₂

Which of the following vitamins is water soluble?

(a)

Vitamin E

(b)

Vitamin K

(c)

Vitamin A

(d)

Vitamin B