Question # 1

Which of the following is pseudosolid?

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CaF₂

Glass

NaCl

All

Which of the following is the repeating monomeric unit in cellulose?

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sucrose

maltose

cellobiose

glucose

In crystal structure of sodium chloride,the arrangement of CI^- ions is

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Fcc

Both fcc and bcc

Bcc

None of these

Change in enthalpy (∆H) of a system can be calculated by

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∆H=∆E - PV

ΔH =ΔE +q

∆H = ∆E - q

∆Η = ΔΕ + P∆V

During esterifcation, the alcobol molecule acts as:

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Oxidizing agent

Electrophile

Reducing agent

Nucleophile

Which set of elements is good loser of electrons

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F2. Cl2, Br2

N, P. As

O. S, Se

Li, Na, K

Which of the following alkyl halides shows higher reactivity?

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R __ F

R __ CI

R __ Br

R __ I

An electron with drawing group attached to e-position in phenol

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makes it basic

Stabilises the phenoxide ion

decreases its basicity

allows it to precipitate in aqueous solution

Optimum PH for enzyme pepsin is

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01

2

05

6.5

Phosphorus is very useful in the growth of:

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leave

stem

seed

root

The total number of 3d-series transition elements is

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10

40

14

58

Where lime is not used

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In refining or metals

In paper industry

In glass industry

In the preparation of NaOH

Hybridzation explain the --------- of orbitals

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Type of bonding

Shapes

Shape and type of bonding

None of above

Standard reduction electrode potential of three metals A, B and C are erespectively + 0.05 V, -3.0 and -1.2V. The reducting power of

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B > C > A

A > B > C

C > B > A

A > C > B

Clemensen's reduction of ketones is carried out in

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H₂with Pd catalyst

Glycol with KOH

LiAIH₄in water

Zn-Hg with conc. HCl

Selection of filter paper depends upon sizes of particles to be :

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Tested.

Filtered.

Checked.

All of above.

pH of 0.1 molar HCl solution is

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1

zero

13

14

Amiino acids are building blocks of:

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Protein

Carbohydrates

Lipids

Fats

The branch of chemistry which deals with thermal energy changes in chemical reactions is called

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Chemical kinetic

Thermodynamics

Thermochemistry

Mechanics

Which of the following statement is incorrect about SHE(Standard hydrogen electrode):

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Reduction potential of Cu⁺² is smaller than H⁺ions whenit is coupled with copper electrode.

gas is passed in it at 1 atm pressure.

Its oxidation potential and reduction potential is zero.

It is made of platinum wire dipped in HCl solution

A pseudo uni-molecular reaction has order of reaction :

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3

2

1

0

Which of the following compounds contains a triple bond?

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Alkane

Alkene

Alkyne

Benzene

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