Question # 1

Part of fresh water consumed in industry is:

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1%

2%

69%

23%

5604 cm3 of H2 gas at STP contains atoms of hydrogen

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6.02×10 (23)

2.6x10(22)

3.01x10(23)

1. 50x 10(23)

The distribution of energies among the molecules of gases was studied by:

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Maxwell

Coulomb

Newton

Boltzmann

which of the following d blocks element can showthe highest oxidation number is its ompound

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Chromium

iron

Copper

Manganese

According to Boyle's law, which parameters give a straight line parallel to x-axis, when we plot a graph between:

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V and T

P and V

P and 1/V

P and PV

Amylum is another name of

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Starch

Amylose

Amylopectin

Cellulose

Styrene has empirical formula CH, and there is 92.2%C and 7.75% hydrogen. If molar mass is 104g mol¯, what will be integral multiple (n) to get molecular formula:

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2

4

6

8

Which gases are produced from landfills?

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NH₃

H₂S

N₂

All of these

Which of the follwing dnes not give brick red precispitate wits Fehling's solution

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Acetaldehyde

Formalin

prorionaldehyde

Acetone

Which order of vapour pressure in the following liquids is correct

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water > ethanol > acetone > ether

ether > acetone > ethanol > water

ether > ethanol > acetone > water

water > ether > acetone > ethanol

C₆H₁₂O₆is molecular formula of:

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Glucose

Dextrose

Fructose

All of these

A solution sucrose is 34.2%. The volume of solution containing one mole of solute :

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342cm³

1000cm³

500cm³

242cm³

A double bond consists of

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Two sigma bonds

One sigma and one Pi bond

One sigma and two Pi bonds

Two Pi bonds

NaH is

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Ionic hydride

Complex hydride

Covalent hydride

Interstitial hydride

The sample being analyzed is called

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Electrolyte

Substance

Analyte

All of above

When nitrogen is 5.6 grams in NO₂. then number of moles of NO₂is

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0.5

0.4

0.04

0.05

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

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2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

Which of the following metal requires radiation of highest frequency to cause emission of electrons?

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Na

Mg

K

Ca

In sixth period 14 of its transition elements are called

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Lanthanides

Actinides

Radioactive elements

None

What is formed when propanone is refluxed with an anhydrous solution of NaBH₄

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Propanal

Propan-1-ol

Propan-2-ol

Propane

A dry alkaline cell has porous Zn anode and MnO₂as cathode the electrolyte used is

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Ca(OH)₂

NaOH

KOH

NH₄OH

How many g of dibasic acid (mol. wt. 200) should be present in 100 ml of the aqueous solution to give 0.1 Normality?

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1 g

2 g

10 g

20 g

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