Question # 1

On hydrolysis sucrose gives:

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glucose and maltose

fructose and lactose

fructose and maltose

glucose and Fructose

Which pair of gases do not obey Dalton's law of partial pressures?

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H2 and He

NH3and HCl

H2 and O2

N2 and O2

Ocean contains part earth's water:

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95%

96%

97%

98%

When calcium formate and calcium acetate are dry heated they form

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НCOOH

C2H5OH

CH3CHO

HCHO

Which of the following has isomorphous structure

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NaF

S

Sn

N

Which element differs from rest of elements of its group?

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Ba

Mg

Ca

Be

CH₃CH₂COOH is also named as:

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Propionic acid

Propanoic acid

Acetic acid

Both (a) & (b)

What is not true for NH4CI

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It has ionic bond

It has covalent bond

It has coordinate bond

It has hydrogen bond

Reactivity of carbonyl compounds is due to

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Electrophilic carbon

Less stearic hindrance

Unsaturation of Co

Polarity of bond

Someone is saying that glass must be a super cooled liquid. The reason that he might have in his mind is that glass has :

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definite shape

definite-volume

crystalline structure

no crystalline structure

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

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low value

higher value

both values

none of these

Molecular orbitals are filled with the available:

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Hund's of rule.

Pauli's exclusion principle.

Aufbau principle.

All of above.

Of the given alkali metals, the one with smallest size is

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Rb

Cs

K

Na

When aluminium electrode is coupled with copper electrode in a galvanic cell :

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Reduction takes place at aluminium electrode.

Oxidation takes place at copper electrode.

Reduction takes place at copper electrode.

Both (a) and (c)

What is the molarity of a solution containing 15.0 g urea in 500 cm³of solution

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0.5 M

1 M

1.5 M

2 M

Which class of compound is more reactive

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Alkane

Alkene

Alkyne

None

Precipitation will occur until the ionic product becomes

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Equal to K_sp

Lesser than K_sp

Greater than K_sp

None of these

A complete chemical Characterization of a compound must include:

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Qualitative analysis

Chemical analysis

Quantitative analysis

None of above

A solution has pH = 0, its H⁺ion concentration is

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1 x 10^-14

1 x 10¹⁴

1 x 10¹

1

Almost forward reaction is complete when value of k_{c :}

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Neither larger nor very small.

Very small.

Very large.

Negligible.

Which statement in not correct about alcohol?

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Ethyl alcohol is heavier than water

Ethyl alcohol ecaporates more quickly

Alcohol with less number of carbon atoms is more soluble in water than alcohol with more number of carbons atoms

Alcohol produces H₂by reaction with sodium metal

The amount of oxygen in the lithosphere is about

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35.50%

40.60%

56.60%

50.50%

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