Consider the following statements.
(i) d-block elements show variable oxidate states.
(ii) Mostly d-block elements form colourless compounds.
(iii) Mostly d-block elements are diamagnetic due to paired electrons.
Which of the above statement is/are not correct?

(a)

(i) only

(b)

(ii) only

(c)

(i) and (ii)

(d)

(ii) and (iii)

Which of the following is not a periodic property?

(a)

Atomic radius

(b)

Ionization enthalpy

(c)

Electron affinity

(d)

Oxidation number

FeSO₄ contains _________ molecules of water of hydration.

(a)

5

(b)

7

(c)

10

(d)

12

Consider the following statements.
(i) Silver, Gold, Mercury and Platinum do not have any effect on water.
(ii) Carbon, Sulphur and Phosphorous do not react with water.
(iii) Beryllium reacts with water less violently.
Which of the following statements is/are not correct?

(a)

(i) only

(b)

(ii) and (iii)

(c)

(iii) only

(d)

(ii) only

Assertion : Beryllium compounds are covalent in nature
Reason : The size of Be²⁺ ion is larger in comparison to the radii of the other divalent ions of alkaline earth metals.
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)

Both assertion and reason are true and reason is the correct explanation for assertion

(b)

Both assertion and reason are true but reason is not the correct explanation for assertion

(c)

Assertion is true but reason are false

(d)

Both assertion and reason are false.

Which metal is used in photoengrave plates in printing industry?

(a)

Co

(b)

Pt

(c)

Zn

(d)

Mg

Which mixture of gases at room temperature does not obey Dalton's law of partial pressure?

(a)

NO₂ and O₂

(b)

SO₂ and SO₃

(c)

CO and CO₂

(d)

NH₃ and HCI

% efficiency can be calculated using the formula __________

(a)

\(\frac { output }{ input } \)

(b)

\(\frac { input }{ output } \times 100\)

(c)

\(\frac { input }{ output } \)

(d)

\(\frac { output }{ input } \times 100\)

The standard value of enthalpy of combustion of benzoic acid is ______

(a)

-3227 kJ mol^-1

(b)

+3227 kJ mol^-1

(c)

-32-27 kJ mol^-1

(d)

+32.27 kJ mol^-1

The molecule that has linear structure is ___________

(a)

CO₂

(b)

NO₂

(c)

SO₂

(d)

SiO₂

Which one of the following has linear shape?

(a)

I₃^-

(b)

ICI₄^-

(c)

BrF₅

(d)

IOF₅

Which one of the following names does not fit a real name?

(a)

3 – Methyl –3–hexanone

(b)

4–Methyl –3– hexanone

(c)

3– Methyl –3– hexanol

(d)

2– Methyl cyclo hexanone

The hybridisations of central and terminal carbon atoms in  are respectively.

(a)

sp and sp

(b)

sp² and sp³

(c)

sp and sp²

(d)

sp² and sp

The number of chain isomers possible in C₅ H_I2 is ____________

(a)

2

(b)

3

(c)

4

(d)

5

Which structure is named as 3-chlorocyclobut-1-ene?

(a)

(b)

(c)

(d)

Which one of the following is called ferric ferrocyanide?

(a)

Na₄[Fe(CN)₆]

(b)

Na₄[Fe(CN)₆]₃

(c)

Fe₄[Fe(CN)₆]

(d)

Fe₄[Fe(CN)₆]₃

In -NO₂, -NH₂, -SO₃H, the decreasing order of I II III -I effect is ___________

(a)

I > II > III

(b)

I > III > II

(c)

III > II > I

(d)

III > I > II

Which one of the following is an example for negative mesomeric effect ?

(a)

-SH

(b)

-SR

(c)

-NH₂

(d)

-NO₂

The best reagent for converting an alcohol into the corresponding chloride is

(a)

PCl₃

(b)

PCl₅

(c)

SOCl₂

(d)

HCl/ZnCl₂

Statement I : Primary alkyl halides on oxidation with DMSO gives aldehydes.
Statement II : DMSO is used as polar aprotic solvent.

(a)

Both statement I and statement II are true individually and statement II explains statement

(b)

Both statement I and statement II are true individually but statement II does not explain statement 1.

(c)

Only statement Iis true, but statement II is false.

(d)

Both statement I and II are false

How does dizzonium salt (C₆H₅N₂+Cl^-) decompose?

(a)

C₆HSCI+N₂

(b)

C₆H₅Br + N₂

(c)

only b

(d)

both a& b

Oxidation of C₆H₅CH₂CI gwith alk, KMnO₄ gives ___________

(a)

C₆H₃CHO

(b)

C₆H₅COOH

(c)

C₆H₅CH₂OH

(d)

C₆H₅CH₃

Which of the following mechanism is followed in the halogenation of alkanes in the presence of U-V light?

(a)

Nucleophilic substitution

(b)

Electrophilic addition

(c)

Free radical substitution

(d)

Elimination reaction

Which of the following pair functional groups represents ambident nucleophiles?

(a)

-SH & - OH

(b)

CN & -NO₂

(c)

-Br & -Cl

(d)

-O- &-CHO

Which one of the following is a gem-dihalide?

(a)

CH₃CHCl₂

(b)

\(\underset { \overset { | }{ Cl } }{ CH_2 } -\underset { \overset { | }{ Cl } }{ CH_2 } \)

(c)

CH₃ - CH₂CI

(d)

C₆H₄Cl₂