Question # 1

Troposphere extends upto km:

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0-15 km

10-15 km

15-40 km

Malt sugar is converted into glucose by an enzyme invertase present in yeast. The process is known as:

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dehydration

condensation

fermentation

oxidation

Carboxylic acid having more than one carboxyl group are called:

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Mono-carboxylic acid

Di-carboxylic acid

Tri-carboxylic acid

Poly carboxylic acid

In esterification, the OH of carboxylic acid is replaced by

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OR+

R+

OR

R

What is the weight of 10 dm³of CO₂at 27°C and 2 atm?

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89.3 g

56.1 g

125 g

127 g

The gasses in the atmosphere are essential for sustaining life on earth; Thus oxygen is required for breathing, What for is carbon dioxide required?

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to help plant to under go photosynthesis

to destroy nitrogen oxide form the atmosphere

to help to clean to atmosphere

to help in fixing of bacteria

Group of element belongs to IIB group

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Zn. Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

Coordination number of Zn and ZnS (Zinc blends) is

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4

6

2

None of these

On the basis of intermolecular forces diamond is a

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ionic solid

covalent solid

metallic solid

molecular solid

In homocyclic compounds the ring consists of

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Carbon and oxygen atoms

Carbon and nitrogen atoms

Only carbon atoms

Carbon atoms with one hetero atom

Which of the following is the element not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

Permonosulphuric acid is known as

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Marshall's acid

Carlo's acid

Sulphuric acid

None of these

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1, 5-pentadiene

Penta-1, 4-diene

1, 1-pentadiene

1, 4-pentene

Which of the following possesses the highest melting point?

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Chlorobenzene

0-Dichlorobenzene

m-Dichlorobenzene

p-Dichlorobenzene

All reactions occur in :

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A single step.

A series of steps

Two steps.

Both (a) and (b)

The process in which the solvent molecules are surrounded and interact with solute ions or molecules is called

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Solvation

Hydration

Hydrogenation

None

According to Le-Chatelier's principal, adding heat to a solid and liquid in equilibrium will cause the

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Amount of solid to decrease

Amount of liquid to decrease

Temperature to rise

Temperature to fall

The geometry of acetylene is

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Angular

Bent

Trigonal

Linear

The term cryoscopy is used for

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Depression of freezing point

Elevation in boiling poing

Lowering of vapour pressure

Osmotic pressure

According to MO Theory, the species O₂+ possesses

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bond order of 2.5

three unpaired

diamagnetic character

stability lower then O₂

Formaldehyde is used to make

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Plastics

Medicine

Antiseptic

All of these

The state of hybridization of carbon atom in methane is

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sp³

sp²

sp

dsp²

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