Question # 1

Domestic waste mostly constitutes

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Non-biodegradable pollution

Biodegradable pollution

Effluents

Air pollution

Copper oxide is dedected by borax bead test with colour:

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Blue

Red

Yellow

Black

For what value ofK_{c almost forward reaction is complete :}

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K_{c =}10³⁰

K_{c =}10^-30

K_{c =}0

K_{c =}1

Steps in SN , reactions are:

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One

Two

Three

Four

which enzyme is not involved in the fermentation of starch ?

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Diastase

Zymase

Urease

Invertase

Alkaline battery has a voltage of

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4.5 V

3.5 V

2.5 V

1.5 V

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2, 3-dimethylbutane

2, 3-methylbutane

2-dimethylbutane

Dimethylbutane

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

The total values of magnetic quantum number of subshell are five, the subshell is

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S-subshell

P-subshell

D-subshell

F-subshell

Peptide bond is a key feature in

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Polysaccharide

Proteins

Nucleotide

Vitamins

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

Which one is the most toxic?

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Carbon

CO

CO₂

SO₂

When 6s orbital is complete then next electron goes to

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6p

6d

5d

4f

The electron affinity of chlorine may be represented by the equation

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Complex protein molecules which catalyses the organic reactions in the living cells are called

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Living organisms

Enzymes

Viruses

Bacteria

Naphthalene, iodine and NH_{4 can :}

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Sublime.

Both (a) and (c).

Crystallize.

None of above.

Group l-A elements react with water fastly than the reaction of group ll-A elements because

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l_Aelements are more soft then ll_A

l_Aelements are non-metals

l_Aelements have 1 electron in their outermost s-orbital and are strongly electropositive

l_Aelements make ionic bond

Halogens on treating with silver salts of acids give

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Alcohol

Ester

Phenol

Alkyl halide

The boiling point of glycerol is more than propanal because of

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Hybridisation

H-bonding

Resonance

All these factors

n + l value for 4f will

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2

5

7

9

When the rate of reaction is entirely independent of the conc. of reaction molecules then order of reaction is

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Zero

First

Second

Third

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s

p

d

f

Which one of the following properties is not correct for ozone?

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It oxidizes lead sulphides

It oxidizes potassium iodide

It oxidizes mercury

It cannot act as a bleaching agent

The geometry of acetylene is

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Angular

Bent

Trigonal

Linear

Heaviest particle is

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Meson

Neutron

Proton

Electron

Extent to H₂ + L₂à2Hl can be increased by :

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Increasing temperature.

Increasing product.

Increasing pressure.

Adding a catalyst.

The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule:

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Hund's rule

Markownikov's rule

Pauli's Exclusion Principle

Auf bau Principle

Number of isomers of butane are:

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One

Two

Three

Four

Given below are some statements concerning formic acid, which of them is true?

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It is a weaker acid than acetic acid

It is a reducing agent

When its calcium salt is heated, it forms a ketone

It is an oxidizing agent

Born-Haber cycle is an application of

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First of thermodynamics

Second law of thermodynamics

First law of thermodynamics

Hess's law

Which is not interstitial hydride

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LaH

VH

TaH

None

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