Question # 1

To distinguish aldehyde from ketone which solution is used

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Alkaline solution

Fehling's solution

A solution containing K2Cr2O7

A solution containing acid only

One of the following metals is the most reactive and form super oxide. Indicate that

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Mg

K

Be

Li

Which one is an isomorphic pair?

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NaNO3, CaCO3,

NaF, MgO

K2SO4 ,K2Cr2O7

Zn, Cd

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

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1

2

3

4

Mathematically, Boyle's law is indicated as:

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VT = K

PT = K

PV = K

None of these

The number of Cl- ions per unit cell of NaCl are

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6

4

2

8

Biological oxygen demand (BOD) is associated with

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Organic matter

Micro organisms

Both a and b

None

Which factor is helping to reduce the environmental pollution

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Urbanization

Industrialization

Increase of plantation

Rapid growth of population

Nitrogen percentage in atmosphere is:

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76%

77%

78%

79%

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

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Carbohydrates

Lipids

Fatty acids

Proteins

Which of the following is a molecular formula of vinyl acetate

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C₄H₆O₂

C₂H₄O₂

C₄H₆O₃

None of these

Orbitals having same energy are called

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Hybrid orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

Which of the following is not a fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Which is used as an antifreeze?

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Glycol

Ethyl alcohol

Water

Methanol

Which of the following nitrogen fertilizer contains more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

Which of the following reagent will react with both aldehyde and ketones?

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Grinard's reagent

Tollen's reagent

Fehling's reagent

Benedict's reagent

Base buffer solution can be prepared by mixing

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Weak acid and its salt

Strong acid and its salt with weak base

Weak base and its salt with strong acid

Strong base and its salt with weak acid

Molecular orbitals are filled with the available:

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Hund's of rule.

Pauli's exclusion principle.

Aufbau principle.

All of above.

The raw materials for the manufacture of urea fertilizer is

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Hydrogen and ammonia

Steam, methane, ammonia

Methane and air

None of these

What is not true about DNA

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It preserve genetic information

To relicates

Synthesized protein

It has a linear structure

CaC₂on hydrolysis form

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CH₄

C₂H₄

C₂H₂

C₆H₆

The percentage of carbon in different types of iron products is in the order of:

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Cast iron > wrought iron > steel

wrought iron > steel > cast rion

Cast iron > steel > wrought iron

Cast iron = steel > wrought iron

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