Question # 1

What is the reason of ionic solids for not conducting electricity?

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free electrons are less

ions don't have translatory mention.

ions don't have translatory mention

the coordination number of the ion is very high.

The destructive distillation of coal gives three products. which of following is not the product of destructive distillation of coal?

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Coal tar

CO₂

Coal gas

Coke

Reason for the rancidity of fat is

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Low sponification

High reactivity of fat

Oxidation of fat

All

Daily protein intake for normal adults should be:

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0.2g/kg

0.5g/kg

0.8g/kg

1.1g/kg

Amino acids are bifunctional organic compounds what are the two function groups

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Carboxylic acid and alcohol

Acohol and aldehyde

Carboxylic acids and ketone

Amino group and carboxylic acid

Which one among the following is not a natural polymer

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Protein

Cellulose

Nylon

Nucleic acid

Amino acids are building material of:

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lipids

protein

carbohydrates

fats

The enthalpies of all elements in their standard states are

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Unity

always +ve

always -ve

zero

The primary building blocks of lipids are

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Fatty acid

Glycerol

Sterols

All

Nitrogen percentage in atmosphere is:

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76%

77%

78%

79%

Covalent solids are composed of

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Ions

Different molecules

Neutral atoms

Diethyl ether

If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is

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Spectrometry

Refractometry

Conductivity measurement

Optical method

Plaster of pares is obtained by heating

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Gypsum

Epsom

Lime stone

Dolomite

In a group, the ionization energy

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Increase

Decreases

Remain constant

First increases then decreases

The structure of white phosphorus is

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Square planar

Pyramidal

Tetrahedral

Trigonal planer

General formula of aromatic carboxyl acids

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R---------------OH

RCOOH

RCOR

ARCOOH

Which of the following compounds gives red precipitate with AgNO₃?

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Kl

K₂CrO₄

NaBr

NaNO₃

The solubility of PbF₂is 2.6 x 10^-3mole dm^-3then its solubility product is

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2.6 x 10^-3

6.76 x 10^-6

5.2 x 10^-6

7.0 x 10^-8

Each vertical column of the periodic table includes elements with chemical characteristics that are in general

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Identical

Similar

Different

Similar as well as different

Sulphur dioxide affects

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Cell wall

Plasmodesmata

All membrane systems

Nucleus

When ethylene glycol is heated with acidified potassium permanganate, the main organic compound obtained is

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Oxalic acid

Glyoxal

Formic acid

Ethanol

Which of the following element's outermost orbits last electron has magnetic quantum number m=0?

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Na

O

Cl

N

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