Question # 1

The essential component of organic compound is

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O

C

P

N

Calcium acetate when dry distilled gives

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Formaldehyde

Acetaldehyde

Acetone

Acetic anhydride

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

When electricity is passed through molten AI₂O₃ + Na₃AIF₆ and 13.5 gms AI are deposited,the number of faraday must be

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0.5

1.0

1.5

2.0

For most of the chemical reaction the rate of reaction

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Increases as the reaction proceeds

Decreases as the reaction proceeds

May increases or decreases during the reaction

Remains constant as the reaction

Which of the following represents elements in order of increasing atomic size?

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I,Br,CI

Na,Mg,C

C,N,O

Li,Na,K

The pore size of the filter paper depends upon

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Nature of the medium

Temperature of the medium

Size of the particles

Mass of the particles

Heating a micture of sodium benzoate and soda lime gives

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Benzene

Methane

Sodium benzoate

Calcium benzoate

The valence orbital configuration of an element with atomic number 23 is

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3d⁵

3d³, 4s²

3d³,4s¹,4p¹

3d²,4s²,4p¹

Number of elements presents in the fifth period of periodic table is

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8

10

18

32

Which is the most volatile compound?

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HI

HCI

HBr

HF

Setting of cement is an

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Exothermic reaction

Endothermic reaction

Neither exothermic nor endothermic

None

Which of the following fluorides of xenon is impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

The weight of 11.2 litres of CO₂at S.T.P. would be

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88 g

44 g

32 g

22 g

Which one of the following elements occurs free in nature?

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N

P

As

Sb

Which of the following possesses the highest melting point?

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Chlorobenzene

o- Dichlorobenzene

m-Dichlorobenzene

p-Dichlorobenzene

SO₂ and NO₂produce pollution by increasing

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Alkalinity

Acidity

Neutrality

Buffer action

Vital force theory was rejected by

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Berzelius

Kolbe

Wholer

Lavoiser

If N_Ais Avogadro's number, then number of valence electrons in 4.2 g of nitride ions N^3-is

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2.4 N_A

4.2 N_A

1.6 N_A

3.2 N_A

Sea weeds are important source of

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Iron

Chlorine

Iodine

Bromine

Which of the following as a molecular diseaes?

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Allergy

Cancer

German measles

Sickle cell anemia

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

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