Question # 1

Stronger the oxidizing agent, higher is

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Redox potential

Standard reduction potential

Reduction potential

_{Oxidation potemial}

Which one is an isomorphic pair?

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NaNO3, CaCO3,

NaF, MgO

K2SO4 ,K2Cr2O7

Zn, Cd

Proteins loose their ability to work

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by slight heating

by change in structure

by slight cooling

when inside the body

Hydrolysis of protein by 6M HCl gives peptides and then alpha-amino acids. How many alpha-amino acids molecules are obtained on the hydrolysis of a tetrapeptide

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2

3

4

5

^{Reaction of ethyl bromide with ammonia}

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Completes in a single step

Completes in two steps

Continues till N is left with no lone pair

is reversible

The pH of neutral water is 6.8 then the temperature of H2O is

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25°C

More than 25°C

less than 25 C°

Not predicted

All gases can be compressed by:

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Keeping constant pressure

Decreasing pressure

Increasing pressure

None of above

At STP,a container has 1 mole of Ar,2 moles of CO₂,3 moles of O₂ and 4 moles of N₂.Without changing the total pressure if one mole of O₂ is removed,the partial pressure of O₂

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Is changed by about 26%

Is halved

Is unchanged

Change by 33%

The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges form:

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2ppm - 6ppm

2ppm - 4ppm

4ppm - 8ppm

2ppm - 3ppm

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

chemist was able to measure the value of lattice energy of KCI to be 690 kj/mol.

From this experiment , he concluded that:

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lattice energy of KBr is 665 kj/mol and that of Ki is 630 kj/mol

lattice energy of KBr is 765 kj/mol and that of Kl 730 kj/mol

lattice energy of KBr is 730 kj/mol and that of Ki 765 kj/mol

lattice energy of KBr is 630 kj/mol and that of kL 665 KJ/mol

Due to the bacterial action on wood it is converted into

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Peat

Lignite

Bituminous coal

Anthracite

N₂and O₂are present in air but they don't react chemically at ordinary conditions of temperature and pressure because it is a

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Spontaneous reaction

Reversible reaction

Exothermic reaction

Non-spontaneous reaction

In fructose the possible optical isomers are

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12

8

16

4

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Positive sign

Negative sign

Without any sign

None

Cannizzaro's reaction is type of reaction:

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Self oxidation-reduction reaction

Disproportion reaction

Addition

A and B

The specific conductance of a 0.1 N KCl solution at 23°C is 0.012 ohm^-1cm^-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be

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0.142 cm^-1

0.66 cm^-1

0.916 cm^-1

1.12 cm^-1

What are the products electrolysis of aqueous sodium chloride at two electrodes

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Chlorine at anode and oxygen at cathode.

Hydrogen at anode and chlorine at cathode.

Chlorine at anode and hydrogen at cathode.

Chlorine at anode and sodium at cathode.

According to Mendeleev, the properties of the elements are periodic function of their

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Atomic number

Atomic volumes

Atomic masses

Atomic densities

The orbital in Rutherford's model is

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Spiral

Circular

Both

None

Which statement about Arrhenius equation is incorrect

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Factor 'A' called Arrhenius constant depends upon collision frequency of reactants

Rate of reaction increase by increasing temperature

Rate constant k is increased

Activation energy Ea is decreased by rise in temperature

Across the lanthanide series, the basicity of the lanthanide hydroxides

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Increases

Decreases

First increases and then decreases

First decreases and then increases

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