Question # 1

In the body fats are hydrolysed into:

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fatty acid and water

fatty acid

glycerol and water

acid and glycerol

The aliphatic compounds are of two types

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Straight chain and cyclic

Branched chain and alicyclic

Straight chain and branched

Homocyclic and alicyclic

H2O and HF are the hydrides of the second period. Fluorine is more electronegative than oxygen. Anyhow, the boiling point of water is greater than that of HF. This is due to:

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water is more polar than HF

water has a bent structure

HF has a zig zag structure after making hydrogen bonding

the number of hydrogen bonds produced by water are greater than that of HF

Caseinogen is

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Simple protein

Derived protein

Phosphoprotein

Rich in sulfur containing amino acids

Chemicals used to kill fungi are:

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Herbicides

Insecticides

Pesticides

fungicides

NaCl is completely ionized in water due to presence of

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hydrogen bonding

dipole dipole forces

ion dipole forces

London dispersion forces

Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that causes contamination in fresh water

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Rain

Live stock waste

Oil leaks and spills

Disposal of industrial effluents

Chemicals used to kill pests are:

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Herbicides

Insecticides

Pesticides

fungicides

Chloroethene, CH₂ = CHC/ is the monomer of PVC.
What are the C-C-C bond angles along the polymeric chain in PVC?

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They are all 109.5°

half are 109.5° and half are 120°

They are all 120°

They are all 180°

Density of a gas is usually expressed in

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Kg m³

Kg dm³

g dm^-3

g cm^-3

Monohalo derivatives of alkanes are called:

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two glucose molecules

alkyl halide

alkenes

imide

The osmotic pressure of 1 m solution at 27°C is

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2.46 atm

24.6 atm

1.21 atm

12.1 atm

If half life period of a reaction is independent of the concentration of the reactants, then the reaction is

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Zero order

First order

Second order

Order is in fraction

N-atom forms three covalent bonds, its electronic configuration is

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A cell in which electric current is produced as a result spontaneous redox reaction is called :

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Dry cell

Electrolytic cell

Galvanic cell

Standard cell

What is not true about DNA

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It preserve genetic information

To relicates

Synthesized protein

It has a linear structure

In ter-butyl alcohol, the tertiary carbon is bonded to

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Two hydrogen atoms

Three hydrogen atoms

One hydrogen atoms

No hydrogen atom

Oxidation of methyl alcohol gives

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Formaldehyde

Acetone

Ester

Acid

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

Out of Cu, Ag, Fe and Zn the metal which can displace all others from theri salt solution is

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Ag

Cu

Zn

Fe

The oxidation number of Mn is KMnO₄is

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+2

+4

+6

+7

The major portion of natural gas is

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Ethane

Propane

Butane

Methane

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