Question # 1

Requirement of macronutrient per acre of the land is

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5 to 200 kg

20-200 kg

200-400 kg

30-400 kg

Which of the following metal oxides is antiferromanetic in nature?

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MnO₂

TiO₂

NO₂

CrO₂

The maximum possible number of hydrogen bonds in which a H₂O molecule can participate is:

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1

2

3

4

Carboxylic acids reacts with sodium carbonate, & gas evolved in this reaction

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CO2

H2

CO

Both a &b

Fresh water of total earth water is:

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1%

2%

3%

4%

The curve which is obtain from Boyle's law is called as

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Isochoric

Isotherm

Adiabatic

All of these

what is the exact value of angle in BF3

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90

104.51

119.5

120°

Which of the following is sulphur highly containing protein

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Collagen

Keratin

Ossein

Reticulin

If the concentration of salt is greater than the acid in buffer solution, then the

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pH = pKa

pH = pKb

pH > pKa

pH < pKb

Enzymes are chemically

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carbohydrates

proteins

fatty acids

phospholipids

Equal masses of methane and oxygen are mixed in an empty container at 25∘C.

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1/3

8/9

1/9

16/17

The relation between Kc and Kp is

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Which of the following compounds gives a ketone with Grignard's reagent?

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Formaldehyde

Ethanenitrile

Ethyl alcohol

Methyl iodide

Gooch crucible is made of:

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Brass

Porcelain

Bronze

.Gold

Proton was discovered by:

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Chadwick

J.J. Rhomson

Millikan.

Goldstein.

Calcium carbide reacts with water to produce

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Acetylene

Methane

Ethylene

Ethane

The solution of which acid is used for seosoning of food ?

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

[Ti(H₂O)₆]⁺³ion absorbs colour:

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Blue

Yellow

Green

Red

Organic compounds generally react at ______ rates

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Slow

Fast

Moderate

None of them

Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

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low ionization energy of sodium

sublimation of metallic sodium to give yellow vapour

emission of excess energy absorbed as a radiation in the visible region as a radiation in the visible region

photosenitivity

Which factor is helping to reduce the environmental pollution

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Rapid growth of population

Urbanization

Industrialization

Increase of plantation

Inn which of these processes are small organic molecules made into macromolecules?

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The cracking of petroleum fractions

The fractional distilation of crude oil

the polymerization of ethane

The hydrolysis of proteins

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