Question # 1

Lipids are naturally occurring compounds produced in cell and are water insoluble but soluble in organic solvent one of the following is not a lipid, Select among the following:

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nucleic acid

atriglceride

sterol

vitamin D

How magnesium reacts with water?

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In frozen ice water

With cold water

In with steam

In hot state

H₂and O₂are enclosed in porous vessel. The effusion of these gases will take place like

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H₂effuses 4 times the rate of effusion of O₂

O₂effuses into air 4 times the effusion of H₂

both effuse at same rate

H₂effuses at 8 times the rate of effusion of O₂

covalent network of crystals has:

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lower melting point than molecular crystals

higher melting point than molecular crystals

H-bonding

Which one of the following pair of atoms is most likely to form an inoic bond?

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Na and F

C and F

N and F

O and F

In which of the following Equilibria will Kc and Kp have not the same value

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2HI <--------> H2+I2

2SO2 + O2 <--------> 2SO3

N2 + O2 <---------> 2NO

All of these

The element with highest E°red

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N

F

O

CI

The temp. and pressure used for PVC polymerization is

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10°C and 10 atm

20°C and 20 atm

52°C and 9 atm

100°C and 10 atm

The high molecular weight materials which yield on hydrolysis the amino acids is called:

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Carbohydrates

Lipids

Fatty acids

Proteins

RNA regulate the synthesis of

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Vitamis

Carbohydrate

Proteins

Lipids

How should the conditions be changed to prevent the volume of a given gas from expanding when its mass increased?

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temperature and pressure both ara increased

temperature and pressure both are lowered

temperature is lowered and pressure is increased

temperature is increased and pressure is descreased

Which enzyme is not involved in fermentation of strach

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Diastase

Zymase

Urease

Invertase

Which of the following has polar bond

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O₂

N₂

HCl

Cl₂

Analytical chemistry is the science of

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Chemical characterization

Physical characterization

Biological characterization

Biochemical characterization

If 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of NaCl is

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0.1

0.01

0.2

0.0196

Which of the following has greatest tendency to lose electron?

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F

Fr

S

Be

The amino acids which human body can synthesize are called ______ amino acid

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Essential

Non essential

Acidic

Basic

Diversity of organic compounds in millions is:

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Four

Five

Six

Seven

Which of the following expressions show a heterolytic bond fission

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Which of the following compounds on oxidation gives benzoic acid?

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Chlorophenol

Chlorotoluene

Chlorobenzene

Benzyl chloride

In which type of following solutions the total volume of solutions may not be necessarily equal to sum of volumes of solute and solvent ?

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Percentage volume/volume

Percentage volume/weight

Percentage weight/volume

Percentage weight/weight

Oxidation number of oxygen in OF₂is

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+1

-1

+2

-2

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