With regard to the strength of acids and bases, Find the incorrect statement among the following.
 

1. Strong acid is one that completely dissociates in water
    

2. K_a is the dissociation con.stant
    

3. CH₃COOH is a weak acid
    

4. Smaller the K_a value, greater is the acid strength
    

Which among the following does not affect adsorption?

1. surface area of the adsorbent

2. catalyst

3. temperature

4. pressure

Which of the following fluoro - compounds is most likely to behave as a Lewis base?

1. BF₃

2. PF₃

3. CF₄

4. SiF₄

Which one of the following will react with phenol to give salicyladehyde after hydrolr.sis?

1. Dichlo methane

2. trichloroethane

3. trichloromethane

4. CO₂

Assertion : Phenol is more acidic than ethanol 
Reason : Phenoxide ion is resonance stabilized

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

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

3. assertion is true but reason is false

4. both assertion and reason are false.

The platinum catalyst used in the oxidation of SO₂ by contact process is poisoned by

1. As₂O₃

2. V₂O₅

3. Fe₂O₃

4. CuCl₂

Which is not a saturated fatty acid ?

1. Palmitic acid

2. Stearic acid

3. Oleic acid

4. Glyceric acid

Which among the following reactions is an example of auto catalysis?

(i) CH₃COOC₂H₅ + H₂O \(\longrightarrow\) CH₃COOH + C₂H₅OH
(ii) 2H₂O₂ \(\longrightarrow\) 2H₂O + O₂
(iii) 2SO₂ + O₂ \(\longrightarrow\) 2SO₃
(iv) 2AsH₃ \(\longrightarrow\) 2As + 3H₂

1. only (i)

2. (i) and (ii)

3. (i) and (ii)

4. (i) and (iv)

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

1. Galena (PbS)

2. HgS

3. ZnS

4. Both (a) & (b)

According to ___ concept, BF₃ acts as a acid.

1. Bronsted.

2. Arrhenius

3. Lewis

4. None of the above

The functional isomer of n-propanol is____.

1. 2-propanol

2. prop-en-ol

3. ethyl methyl ether

4. acetaldehyde

The number of close neighbours in a body centred cubic lattice of identifical spheres is

1. 6

2. 4

3. 12

4. 8

The above reaction is called

1. Gattermann reaction

2. Williamson ether synthesis

3. Swern's reaction

4. Riemer tiemann reaction

In auto catalysis ___ acts as catalyst.

1. reactant

2. product

3. bothnone

4. none

Addition of water across the double bond of an alkene in presence of sulphuric acid giving alcohol follows_____ rule.

1. Markownikoff's

2. anti Markownikoff

3. Sayt zeff's

4. Swern

Ketones when reduced in the presence of Pt forms

1. primary alcohols

2. secondary alcohols

3. tertiary alcohols

4. acids

The IUPAC name of the compound

 is

1. 4 - methoxy - 2 - nitro benzaldehyde

2. 4 methoxy - 6 - nitro benzaldehyde

3. 2- formyl - 5 - methoxynitrobenzene

4. 4 formyl - 5 - nitroanisole

Which of the following gives violet colour with neutral ferric chloride solution?

1. phenol

2. glycerine

3. benzyl alcohol

4. ethanol

Among the following, one does not belong to calcination, Pick the odd one out.

1. \({ PbCO }_{ 3 }\overset { \Delta }{ \longrightarrow } PbO+{ CO }_{ 2 }\uparrow \)

2. \({ CaCo }_{ 3 }\overset { \Delta }{ \longrightarrow } Cao+{ CO }_{ 2 }\uparrow \)

3. \(PbS{ O }_{ 3 }\overset { \Delta }{ \rightarrow } PbO+{ 2SO }_{ 2 }\uparrow \)

4. \({ ZnCO }_{ 3 }\overset { \Delta }{ \rightarrow } ZnO+{ CO }_{ 2 }\uparrow \)

. Match the following

A	V2O5	i)	High density polyethylene
B	Ziegler - Natta	ii)	PAN
C	Peroxide	iii)	NH3
D	Finely divided Fe	iv)	H2SO4

1.  A     B    C       D
   (iv)  (i)    (ii)    (iii)

2.  A     B    C       D
   (i)  (ii)    (iv)    (iii)

3.  A     B    C       D
   (ii)  (iii)    (iv)    (i)

4.  A     B    C       D
   (iii)  (iv)    (ii)    (i)

Tollen's reagent is _______

1. ammoniacal cuprous chloride

2. ammoniacal cuprous oxide

3. ammoniacal silver nitrate

4. ammoniacal silver chloride

Degree of dissociation \(\alpha \) is

1. \(\alpha =\frac { { { K }_{ a } } }{ C } \)

2. \(\alpha =\frac { { { C }^{ 2 } } }{ { K }_{ a } } \)

3. \(\alpha =\sqrt { \frac { { K }_{ a } } { { C } }} \)

4. \(\alpha =\sqrt { \frac { { C } }{ { K }_{ a } } } \)

The emf generated by an electrochemical cell is given by the symbol

1. E

2. M

3. F

4. S

The process of removing ions from a sol by diffusion through a permeable membrane is called

1. Ultra filtration

2. Dialysis

3. Eletrophoresis

4. Cataphoresis

Amine that cannot be prepared by Gabriel Phthalimide synthesis is _____________

1. benzyl amine

2. methyl amine

3. ethyl amine

4. phenyl amine

Which of the following will not undergo diazotisation?

1. m-toluidine

2. aniline

3. p-amino phenol

4. benzyl amine

In pseudo-order reactions

1. The actual order of reaction is different from that expected using rate law expression

2. The concentration of at least one reactant is taken in large excess.

3. The concentration of reactant taken in excess may be taken as constant

4. All of these

The hybridisation of carbon in CHO group is _______

1. dsp²

2. sp³

3. sp²

4. sp

_________ is known as Bayer's reagent.

1. Hot dilute alkaline KMnO₄

2. Cold dilute alkaline KMnO₄

3. Hot Conc. acidic KMnO₄

4. Cold Conc. acidic KMnO₄

Which is not an anionic complex?

1. [Cu(NH₃)₄]Cl₂

2. K₄[Fe(CN)₆]

3. K₃[Fe(CN)₆]

4. [NiCl₄]^2-

A colloidal system in which the dispersed phase has very little affinity for the dispersion medium is called

1. lyophilic

2. lyophobic

3. solid

4. aerosol

Sucrose on hydrolysis gives

1. maltose

2. glucose and fructose

3. 2 molecules of maltose

4. starch

Extent of physisorption of a gas increases with______

1. increase in temperature

2. decrease in surface area of adsorbent

3. decrease in pressure

4. decrease in temperature

The trend in ionisation enthalpy of a transition element is not regular because,

1. removal of one electron alters the relative energies of 4s and 3d orbitals

2. due to different electronic configuration (stability)

3. Poor screening of 3p-orbital

4. due to decrease in effective nuclear charge

Orthophosphorus acid on heating gives________

1. Hypophosphorus

2. Orthophosphoric acid

3. Phosphine gas

4. both (b) and (c)

The value of rate constant of a pseudo first order reaction________________

1. Independent on the concentration of reactants present in small amount

2. Depends on the concentration of reactants present in excess

3. Independent of the concentration of reactants

4. Depends only on temperature.

The reagent that does not react with both acetone and benzaldehyde is ______.

1. Sodium hydrogen sulphite

2. Fehling's solution

3. Hydrazine

4. Semicarbazide

FeSO₄ on heating gives ____________

1. SO_² and O₂

2. SO₂ and SO₃

3. SO₂

4. SO₃

The catalytic activity of transition metals is due to

1. the formation of a variety of oxidation states

2. the formation of intermediate products

3. the capability of forming interstitial compounds.

4. all the above

Which of the following is commonly used to produce foam in froth floatation process?

1. Pine oil

2. Cresol

3. NaCN

4. Xanthate

Which one of the following ions has the same number of unpaired electrons as present in V³⁺?

1. Ti³⁺

2. Fe³⁺

3. Ni²⁺

4. Cr³⁺

The process of separation of emulsion into two separate layers is called______

1. Emulsification

2. Deemulsification

3. Coagulation

4. Flocculation

In H₂ - O₂ fuel cell the reaction occur at cathode is

1. O₂(g) + 2H₂O (l) + 4e^- → 40H^- (aq)

2. H⁺(aq) + OH^- (aq) → H₂O(i)

3. 2H₂(g) + O₂ (g) → 2H₂O (g)

4. H⁺ + e^- →  H₂

When chlorine is passed through acetic acid in presence of red phosporous, it forms

1. acetyl chloride

2. trichloro acetaldehyde

3. trichloro acetic acid

4. methyl chloride

Ether oxygen is capable of forming_______bonds with electron deficient species.

1. covalent

2. ionic

3. coordinate covalent

4. hydrogen

Which one of the following does not involve coagulation?

1. .formation of delta

2. peptisation

3. clotting of blood

4. tanning of leather

Which of the following reduction is not thermodynamically feasible?

1. \({ Cr }_{ 2 }{ O }_{ 3 }+2Al\longrightarrow { Al }_{ 2 }{ O }_{ 3 }+2Cr\)

2. \({ Al }_{ 2 }{ O }_{ 3 }+2Cr\longrightarrow { Cr }_{ 2 }{ O }_{ 3 }+2Al\)

3. \(3Ti{ O }_{ 2 }+4Al\longrightarrow 2A{ l }_{ 2 }{ O }_{ 3 }+3Ti\)

4. none of these

The specific conductance of a 0.01 M solution of KCl is 0.0014 ohm-1 cm^-1 at 25°C. Its equivalent conductance is

1. 14 ohm^-1cm²eq^-1

2. 140 ohm^-1cm²eq^-1

3. 1.4 ohm^-1cm²eq^-1

4. 0.14 ohm^-1cm²eq^-1

Phenol turns ___ when air oxidised.

1. red

2. violetblue

3. blue

4. green

Assertion: rate of reaction doubles when the concentration of the reactant is doubles if it is a first order reaction.
Reason: rate constant also doubles

1. Both assertion and reason are true and reason is the correct explanation of assertion.

2. Both assertion and reason are true but reason is not the correct explanation of assertion.

3. Assertion is true but reason is false

4. Both assertion and reason are false.

The general formula for aliphatic ether is________

1. C_nH_2n+2O

2. C_nH_2nO

3. C_nH_2n-2O

4. C_2nH_2n+1O

If the two alkyl groups attached to the oxygen atom are the same, then it is called ___ ether.

1. simple

2. symmetrical

3. unsymmetrical

4. both (a) and (b)

Flux is a substance which is used to convert

1. Mineral into silicate

2. Infusible impurities to soluble impurities

3. Soluble impurities to infusible impurities

4. All of these

The pH of pure water at 25°C is

1. 0

2. 1

3. 7

4. 14

Emulsion can be broken into constituent liquids by

1. heating

2. freezing

3. centrifuging

4. all the above

A metal ion from the first transition series forms an octahedral complex with magnetic moment of 4.9 BM and another octahedral, complex which is diamagnetic. The metal ion is

1. Fe²⁺

2. Co²⁺

3. Mn²⁺

4. Ni²⁺

When phenol reacts. with CCl₄ and NaOH, the product formed is__________ acid.

1. salicylic

2. cinnamic

3. benzoic

4. carboxylic

Pick the strongest conjugate base among the following

1. Cl^-

2. \({ NO }_{ 2 }^{ - }\)

3. \({ SO }_{ 4 }^{ 2- }\)

4. CH₃COO^-

Tyndall effect is a_______ property of colloidal particles.

1. optical

2. kinetic

3. electrical

4. eletronic

The structure of 2-methyl-1-propanol is_______.

1. 

2. 

3. 

4. 

acid chloride + alcohol \(\rightarrow\) \(\underline { \quad \quad \quad ?\quad \quad \quad } \).

1. acids

2. amides

3. esters

4. amines

During decomposition of an activated complex

1. energy is always released

2. energy is always absorbed

3. energy does not change

4. products may be formed.

The number of carbon atoms per unit cell of diamond is

1. 8

2. 6

3. 1

4. 4

The pyrimidine bases present in DNA are

1. Cytosine and Adenine

2. Cytosine and Guanine

3. Cytosine and Thiamine

4. Cytosine and Uracil

The IUPAC name for isobutyl alcohol is_______

1. 2-methyl-1-propanol

2. 2-methyl-1-butanol

3. 2,2-dimethyl-2-propanol

4. 1,1-dimethyl- 2-butanol

C₆H₅OH+Zn\(\longrightarrow\) C₆H₆ + ZnO this reaction is used to identify the _______present in natural products.

1. methoxy group

2. aIkoxy group

3. double bond

4. aromatic ring

Ethers in the presence of atmospheric oxygen oxidises to give hydroperoxides and dialkyl peroxides Such a spontaneous reaction by atmospheric oxygen is called_____.

1. auto oxidation

2. acylation

3. alkylation

4. dehydration

The reaction of Lucas reagent is fast with

1. (CH₃)₃ COH

2. (CH₃)₂ CHOH

3. CH₃(CH₂)₂OH

4. CH₃CH₂OH

In acid medium, potassium permanganate oxidizes oxalic acid to

1. oxalate

2. Carbon dioxi

3. acetate

4. acetic acid

Pick the odd one out.

1. dialysis

2. electro dialysis 

3. eleCtrophoresis

4. ultrafilteration