Question # 1

Mass spectrometry is used to determine the

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Number of isotopes of an element

Relative abundance of isotopes

Relative isotopic masses

All of these

Which one of the following substances is a synthetic polyester?

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cotton

nylon

rayon

terylene

Propanone does not undergo

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Oxime formation

Reduction of Fehling solution

Hydrazone formation with hydrazine

Reaction with HCN

Which of the following is NOT thermoplastic

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PVC pipes

Plastic toys

Varnish

Both A and B

pH value of pepsin is:

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3

2

4

1.4

The reaction between fat and NaOH is called?

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Esterification

Hydrogenolysis

Fermentation

Sponification

Density of a gas is usually expressed in

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Kg m³

Kg dm³

g dm^-3

g cm^-3

Which pair of molecules have debye force

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Ne and Ne

Argon and water

Na⁺ion and water

Water and water

Which of spectral lines when atoms are subjected to strong electric field is called:

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Compton effect

Stark effect

Zeeman effect

Photoelectric effect

The suspended particles in the raw water can be removed by the

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Coagulation

Aeration

Hydration

Dehydration

The film forming components of paints are

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resins

thinners

pigments

driers

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBh₄or LiAH₄?

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1-Propanol

2-Propanol

2-Methyl2-Proponal

Ethanol

Which of the following solutions has the highest boiling point ?

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5.85% solution of sodium chloride.

18.0% solution of glucose.

6.0% solution of urea.

All have same boiling points.

The mass of Al₂S₃formed when 20 grams Al reacts completely with S is

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60 g

50 g

50.55 g

55.55 g

If Grignard reagent is allowed to react with another alkyl halide the main product is

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An alkane

Cyclo alkane

Alkyne

An alkene

10g of NaOH has been dissolved per kg of solvent. The molality of solution is :

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.25 m

1.5 m

.5 m

2.5 m

A solution sucrose is 34.2%. The volume of solution containing one mole of solute :

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342cm³

1000cm³

500cm³

242cm³

Alkynes are colourless & odouless except

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Acetylene

Propyne

Butyne

Pentyne

The structure of benzene is

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Hexagonal

Pyramidal

Square planer

Tetrahedral

During the preparation of alkynes the active metals that react with tetra halo-alkanes are

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Zn

Mg

Both a and b

None

All covalent bonds formed between the two atoms are non-polar when

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Covalent bond between two non-metal atoms

Covalent bond between metal and non-metal

Covalent bond between two atoms of same element

Covalent bond between metal atoms

The liquid obtained after passing the mixture through filter paper is termed as:

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Extract

Residue

Filtrate

Sample

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