Question # 1

One of the following is neutral amino acid

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Arginine

Lysine

Glutamine

Valine

NaOH+HCI- NaCI+ H2O. Enthalpy change in the above reaction is called

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Enthalpy of reaction

Enthalpy of Neutralisation

Enthalpy of formation

Enthalpy of combustion

The elements of group I-A react violently with water and make the solution

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neutral

amphoteric

acidic

alkaline

Octyl acetate has the flavor of

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Orange

Pineapple

Banana

Apple

The fertilizer contains 33___35%n is:

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ammonium nitrate

potassium nitrate

urea

ammonia

what is the exact value of angle in BF3

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90

104.51

119.5

120°

The heat of reaction depends upon

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Temperature of the reactants

Physical states of the reactants and the products

Both A) and B)

Path of the reaction and the temperature

By convention, the standard heat of formation of all elements is assumed to be

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Zero

positive

Negative

Infinity

Mg(s) + 2HCI(aq). ------------ MgCl2(aq)+ H2(g)

Given that; Mg=21g and HCI=21g, the excess reactant is

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Mg

HCI

Both are in stoichiometric amounts

None of these

Heat balance of earth is maintained by sphere:

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Hydrosphere

atmosphers

lithosphere

biosphere

Pan is an irritant to human beings and it affects

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Eyes

Nose

Hair

Skin

Which of the following geometry is associated with the compound in which the central atom assumes sp³d hybridization?

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Planar

Pyramidal

Angular

Trigonal bipyramidal

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

Self condensation of acetaldehyde in the presence of dilute alkalies gives

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An acetal

An aldol

Mesitylene

Propionaldehyde

For what value ofK_{c almost forward reaction is complete :}

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K_{c =}10³⁰

K_{c =}10^-30

K_{c =}0

K_{c =}1

A ring contains 3 gram diamond. The number of C-atoms which a ring contains is

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3.01 x 10²³

1.5 x 10²³

6.02 x 10²⁴

3.01 x 10²⁴

The process in which one s and two p orbitals mix up with each other is called

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Sp-hybridization

Sp²-hybridization

Sp³-hybridization

Dsp²-hybridization

The addition of HCN to carbonyl compounds is an example of

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Nucleopihlic substituion

Electrophilic addition

Nueleophilic addition

Electrophilic substitution

A solution of NaOH has pH = 13, then concentration of NaOH is

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10^-13M

10¹³M

10^-1M

10⁺¹M

Generally the bond formed by metals with non-metals is

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Ionic

Covalent

Polar

Non- polar

Smallest particle of an element which may or may not have independent existence is known as:

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A molecule

An ion

An atom

An electron

The term cryoscopy is used for

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Depression of freezing point

Elevation in boiling poing

Lowering of vapour pressure

Osmotic pressure

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