Considering Ellingham diagram, which of the following metals can be used to reduce alumina? 

(a)

Fe

(b)

Cu

(c)

Mg

(d)

Zn

Identify the metal that occurs in free state.

(a)

Al

(b)

Au

(c)

Mg

(d)

Ca

Which of the following is not sp² hybridised?

(a)

Graphite

(b)

graphene

(c)

Fullerene

(d)

dry ice

The catalytic behaviour of transition metals and their compounds is ascribed mainly due to _______.

(a)

their magnetic behaviour

(b)

their unfilled d orbitals

(c)

their ability to adopt variable oxidation states

(d)

their chemical reactivity

In which of the following coordination entities the magnitude of Δ₀ will be maximum?

(a)

[Co(CN)₆]^3-

(b)

[Co(C₂O₄)₃]^3-

(c)

[Co(H₂O)₆]³⁺

(d)

[Co(NH₃)₆]³⁺

Co-ordination isomerism is exhibited by _______.

(a)

[Cr(en)₂Cl₂]NO₂

(b)

[Pt(NH₃)₄] [CuCl₄]

(c)

[Cr(en)₂Cl₂]NO

(d)

[Co(NH₃)₅Cl]Cl₂

Werner's theory was not able to explain_______ of coordination compounds.

(a)

colour

(b)

magnetic properties

(c)

both (a) and (b)

(d)

neither (a) nor (b)

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)

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

The crystal with a metal deficiency defect is ________.

(a)

NaCl

(b)

FeO

(c)

ZnO

(d)

KCl

A binary solid A+B has a structure with B^- ions constituting the lattice and A⁺ ions occupying 25% tetrahedral holes. Formula of the solid is _______.

(a)

A₂B

(b)

AB₂

(c)

AB

(d)

AB₄

The addition of a catalyst during a chemical reaction alters which of the following quantities?

(a)

Enthalpy

(b)

Activation energy

(c)

Entropy

(d)

Internal energy

During decomposition of an activated complex.

(a)

energy is always released

(b)

energy is always absorbed

(c)

energy does not change

(d)

products may be formed.

A solution which is resistant to changes of pH on addition of small amounts of an acid or a base is known as _______.

(a)

buffer solution

(b)

true solution

(c)

isohydric solutionideal solution

(d)

ideal solution

The metal to be protected from corrosion is treated with cone HNO₃ The process is called ________.

(a)

galvanzin

(b)

passivation

(c)

cathodic protection

(d)

formation of alloys

Which one of the is not a surfactant?

(a)

CH₃ -(CH₂)₁₅ -N⁺ -(CH₃)₂ CH₂Br

(b)

CH₃ -(CH₂)₁₅ -NH₂

(c)

CH₃ -(- CH₂- )-₁₆CH₂ OSO₂^- Na⁺

(d)

OHC-(CH₂)₁₄ -CH₂ -COO^- Na⁺

Assertion: Phenol is more acidic than ethanol
Reason: Phenoxide ion is resonance stabilized
Codes:
a) both assertion and reason are true and reason is the correct explanation of assertion.
b) both assertion and reason are true but reason is not the correct explanation of assertion.
c) assertion is true but reason is false
d) both assertion and reason are false.

(a)

if both assertion and reason are true and reason is the correct explanation of assertion.

(b)

if both assertion and reason are true but reason is not the correct explanation of assertion.

(c)

assertion is true but reason is false

(d)

both assertion and reason are false.

 is __________

(a)

Mesitylene

(b)

Pyrogallol

(c)

Hydroxy quinol

(d)

Phluroglucinol

Which one of the following reduces tollens reagent

(a)

formic acid

(b)

acetic acid

(c)

benzophenone

(d)

none of these

Identify 'X'.

(a)

(b)

(c)

(d)

\(Phenol\overset { Zn }{ \underset { dust }{ \longrightarrow } } 'X'\overset { { CH }_{ 3 }Cl }{ \underset { anhy\ AlC{ I }_{ 3 } }{ \longrightarrow } } Y\overset { alk }{ \underset { { KMnO }_{ 4 } }{ \longrightarrow Z } } \) the product Z is __________.

(a)

benzaldehyde

(b)

benzoic acid

(c)

benzone

(d)

toluene

Identify X in the sequence give below

(a)

(b)

(c)

(d)

Nitrobenzene on electrolytic reduction in con. sulphuric acid, the intermediate formed is

(a)

C₆H₅NH - NHC₆H₅

(b)

C₆H₅ - NHOH

(c)

C₆H₅ - N = N - C₆H₅

(d)

C₆H₅HSO₄

Sucrose contains glucose and fructose linked by

(a)

C₁ - C₁

(b)

C₁ - C₂

(c)

C₁ - C₄

(d)

C₁ - C₆

Amino acids are linked covalently by ________bonds.

(a)

hydrogen

(b)

Co-ordinate

(c)

both (a) and (b)

(d)

peptide

Cholesterol is an example of _________.

(a)

protein

(b)

vitamin

(c)

carbohydrat

(d)

lipid