Question # 1

Which substances do nto react immediately with bromine water:

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ethane

benzene

ethene

phenol

The transition temperature of tin is

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95.5 C°

13.2 C°

13.2°C

128.5°

Which of the following wast material is not recycled for use again?

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glasses

paper

plastic toys

hides of animals

Dichlorodifluoromethane, CC/2F2 has been used in aeroso propellants and as a refrigerant.
Which statement helps to explain why dichlorodifluromethane is chemically inert ?

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The carbon-fluorine bond energy is large

The carbon-fluorine bond has a law polarity

Fluorine is highly electronegative

Fluorine compound are non-flammable

Which property of liquid is measured by polarimeter

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Conductance

Optical activity

Refractiye Indéx

Change in volume

NaNO₃and CaCO₃crystals are Rhombohedral isomrophism is due to

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both soluble in water

their cations belong to S block element

same shape of NO₃^-1and CO₃^-2ions which is triangular planar

same number of O atoms

When ethyl magnesium bromide is treated with carbon dioxide and the product hydrolyzed we get

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formic acid

propionic acid

oxalic acid

acetic acid

Which of the following statement about graphite is not true?

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The coordination number of carbon atoms is 4.

the carbon atoms are arranged layers.

the layers in graphite are attracted to each other weak forces.

the corbon atoms use only three of their four outer electrons for covalent bonding.

The compound which does not form iodoform:

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methyl alcohol

ethyl alcohol

acetone

acetaldehyde

The element which has greatest value of Reduction potential is used as

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Strongest reducing agent

Weak oxidizing and strong reducing agent

Strongest oxidizing agent

None of these

Which of the following is derived lipid

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Sterols

Vit D

Terpenes

All

Ethyl bromide is formed by the reaction of HBr with

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Ethane

Ethene

Ethyne

Propane

The amount of heat evolved or absorbed by keeping reactants and products at one atmospheric pressure at room temperature is called

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Heat of formation

Standard heat of formation

Standard enthaply change

None

Sulphur dioxide affects

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Cell wall

Plasmodesmata

All membrane systems

Nucleus

Hemoglobin contains nearly:

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10,000 atoms

100 atoms

1000 atoms

1 atom

The amount of oxygen in the lithosphere is about

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35.50%

40.60%

56.60%

50.50%

Which of the following compound is known as oil of winter green?

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Phenyl benzoate

Phenyl salicylate

Phenyl acetate

Methyl salicylate

The cathodic reaction in the electrolysis of dill H₂SO₄with Pt electrodes

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Reduction

Oxidation

Both oxidation and reduction

neither oxidation or reduction

Which is used to identify Cu²⁺ions

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Nitric acid

Sulfuric acid

NaOH

HCI

The state of hybridization of carbon atom in methane is

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sp³

sp²

sp

dsp²

The electrolytic cell used for the production of metallic sodium is known as

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Down's cell

Solvary's cell

Haber's cell

None of these

The detection of functional group is called:

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Numerical analysis

Qualitative analysis

Quantitative analysis

Combustion analysis

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