Question # 1

The removal of electron from a neutral atom gives rise to.

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Molecular anion

Anion

Cation

Molecular Cation

Which of the following is a heterogeneous mixture

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Concrete mixture

a solution of potassium nitrate in water

a solution of calcium hydroxide in water

Hot chocolate

Which is used to manufacture soap?

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NH4OH

Ca(OH)2

NaOH

Mg(OH)2

Which one is not an Arrhenious acid?

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HCl

H2SO4

CO2

HNO3

The unit of ionization energy is

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nm and pm

kJ mol-1

Pascal

Newton

Which one of the suspension.

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Chalk in water

Tootpast

Ink

Blood

Why the gas starts coming out when you open a can of fizzy drink.

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Because gteh solubiliyt of the gas increases

Because the gas is dissolved under pressure hence it comes out when pressur eis decreased

Becaue the gas is insoluble in water

Because the solubility of hte gas decreases at high pressure.

In a neutralization reaction between KOH and H3PO4how many molecules of KOH will react with one molecule of H3PO4

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1

2

3

4

Whcih is true about the equilibrium state?

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The forard reaction stops

Both forward and reverse reactions stop

Both foward and reverse reactions continue at the same rate

The reverse reaction stops

During the glycolysis net ATP produced are.

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2

4

6

8

Whcih period of the modern periodic table is considered as incomplete period.

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4th

5th

6th

7th

Chalco-pyite is an ore of:

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iron

aluminium

silver

copper

Lewis acid-base concept have the following characteristics except:

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formation of an adduct

Formation of a co-ordinate covalent bound

Donation and acceptance of an electron pair

Donation and acceptance of a proton

Alkanes are least reactive compounds because they are.

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Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

General formula of alkynes is:

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C_nH_n

C_nH_2n

C_nH_2n+2

C_nH_2n-2

When the magnitude of Kc is very small it indicates.

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Equilibrium will never establish

All reactants will be converted to products.

Reaction will go to completion

The amount of products is negligible

Which one of the following statements about glucose and sucrose is incorrect.

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Soluble in water

Naturally occuring.

Carbohydrates

Disaccharides

Coal gas is mixture of

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CO and CH₄

CO . CH₄. CO₂

CO, CH₄, H₂

CO, H₂ and CO₂

Which disease cause when humans use water of industrial effluents.

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Cancer

Asthma

Jaundice

cholera

The ability of carbon atoms to form chains is called.

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Isomerism

Catenation

Resonance

Condensation

Which disease causes bone and tooth damage?

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Fluorosis

Hepatits

Cholera

Jaundice

At which region all weather occurs?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

That cell in which electrical energy is converted into chemical energy is called

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Galvanic cell

Electrolytic cell

Fuel cell

Daniel cell

An orbital which is spherical and symmetrical is

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S-Orbital

P - Orbital

d- Orbital

f - Orbital

During combustion analysis, CO2 produced is absorbed in

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Mg (CLO4)2

50% KOH

CaCl2

P2O5

Isomorphic crystals show

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Same chemical properties

Same physical properties

Same crystalline form

Same melting point

When solid KI dissolved in water, its heat of solution is positive. What would happen to dissolution when temperature is increased.

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Increases

Decreases

Remain same

Firs increases than decreases

When atoms are subjected to strong electric field, splitting of spectral lines is called.

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Zeeman effect

stark effect

Photoelectric effect

Compton effect

Which concentration unit is independent of temperature.

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Molarity

Molality

ppm

both a and b

A single lead cell provides volts

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2

4

6

8

Molecule in which the distance between two carbon atoms in the largest is.

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C2H6

C2H4

C2H2

C6H6

The vapour pressure of an aqueous solution of glucose is.

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Equal to vapour pressure of water

Independent of temperature

More than vapour pressure of pure water

Less than vapour pressure of pure water

In zero order reaction the rate is independent of.

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

When concentrated H2SO4 and solid sodium chloride react together at room temperature the product are.

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Two salts only

A salt and a base

A salt and an acid

A salt and water

Which of the following element is not present in all proteins

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Carbon

hydrogen

Nitrogen

Sulphur

The composition of white lead is

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PbCO3.Ph(OH)2

PbCO3.2Pb(OH)2

2PbCO3.Pb(OH)2

PbCO3

How many zones through which the charge passes in a rotary kiln

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4

3

2

5

Sodium is collected over molten sodium chloride in Down's cell, because.

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It does not react with NaCl

It is lighter in weight and floats on molten NaCl

Its reactivity is greater than NaCl

None of these

Role of H2S in the given chemical reaction is H2S + I2--------------- 2HI+S

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Oxidising agent

Reducing agent

Dehydrating agent

As an acid

The main pollutant of leather tanneries in the waste water is due to

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Lead

Chromium VI

Copper

Chromium III

Majority of the elements of the periodic table are.

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Semi metals

Non metals

Metals

Noble metals

Acetylene reacts with ammoniacal cuprous chloride a red ppt is formed. This red ppt is of

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Copper chlorite

Coper chlorate

Cupric oxide

Copper acetylide

Which element among the following belongs to Group IV A of the Periodic table.

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Barium

Iodine

Lead

Oxygen

SN₂reactions can be best carried out with

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primary alkyl halides

secondary alkyl halides

tertiary alkyl halides

All the three