Question # 1

One carbon is _________ times heavier than hydrogen.

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12

13

14

15

T (K) =

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(T) °C + 273

(T) °C -273

(T) °C + 373

(T) °C -373

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

Group runs from ________________

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Top to bottom

Left to right

Top to right

Bottom to left

________________ cannot be seen by naked eye.

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Matter

Molecules

Solid

Liquids

All metals are solid except

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AI

Mg

Na

Hg

The symbol of barium is:

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Ba

Bi

Br

B

In ________________ Rutherford's was studying radiations.

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1911

1931

1921

1922

105 elements were discovered by the year ________________

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1984

1974

1086

1996

The reaction of ionic compound is very ________________ in solution.

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Slow

Fast

Medium

Nil

The elements of group 17 are called:

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Carbon family

Noble gases

Alkaline earth metals

Halogen family

According to the Lewis concept acid is a substance which can.

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Donate a proton

Donate a pair of electron

Accept a proton

Accept a pair of electron.

Lavoisier named binary compounds of oxygen acids in .

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1787

1790

1815

1828

A base is a substance which neutralizes an acid which of these substances is not a base?

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Aqueous ammonia

Sodium chloride

Sodium Hydroxide

Calcium Hydroxide

Which one of the following gas has greater retaining capacity?

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O₂

N₂

CO

CO₂

In which one of the following is a substitution reaction?

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Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

ozone depletion (i.e O3--------------> O2 + O) occurs in:

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lower stratosphere

middle stratosphere

upper stratosphere

troposphere

Which gas is used to destroy harmful bacteria in water?

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Iodine

Chlorine

Flourine

Bromine

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

Which of the following thing is a lewis base?

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NH₃

BF₃

H⁺

AlCl₃

Which diseases cause by the deficiency of vitamin E?

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Rickets

Anemia in babies

Scurvy

Night blindness

Which of the following is reducing sugar.

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Glucose

Fructose

Sucrose

Starch

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

If a strip of Cu metal is placed in a solution of FeSO₄

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Cu will be precipitated out

Fe is precipitated out

Cu and Fe both dissolve

No reaction takes place

The mass of one mole of electrons is.

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1.008 mg

0.55 mg

0.184 mg

1.673 mg

The number of bonds in nitrogen molecule is

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One o and oneπ

One o and twoπ

Three sigma only

Two o and twoπ

Which of the following substances is used as decolorizing agent.

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Silica gel

Animal charcoal

conc. H2SO4

Asbestos

When water freezes at 0 ^oC, its density decrease due to.

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Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

The deviation of a gas from ideal behavior is maximum at.

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-10 ^oC and 5.0 atm

-10^oC and 2 atm

0^oC and 2 atm

100^oC and 2 atm

In a electrolytic cell the electrons flow from

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Cathode to anode

Anode to cathode

From cathode to anode or opposite, depending upon the nature of electrolyte

All of the above

Suppose a new element 'J' has discovered and has seven electron in the valence shell. Which statement about this element would be correct.

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It is monatomic

It form covalent bond with hydrogen

It forms stable positive ion

It forms covalent bond with group IA element

A chemical change always involve

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Absorption of heat

Evolution of heat

Either absorption or evolution of heat

The liberation of heat and light energy

The law of mass action was given by

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D.C. down and P wage

Gay Lussic and C.M

C.M Goldberg and P. Waage

Hendeson and Le Chateller's

Which sugar is called milk sugar

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Glucose

Fructose

Lactose

Maltose

Isopropyl alcohol on oxidation gives

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Acetaldehyde

Acetone

Ether

Propene

------------- does not belong to Alkaline-Earth metals

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Be

Ra

Ba

Rn

A gas decolorizes alkaline KMnO4 but has no action with ammoniacal AgNO3, this gas may be

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C2H2

C2H4

C2H6

CH4

Which compound is more soluble in water

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C₂H₅OH

C₆H₅OH

CH₃COCH₃

n - hexanol

Ethanol can be converted into ethanoic acid by

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Hydrogenation

Hydration

Oxidation

Fermentation

Ketones are prepared by the oxidation of.

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

Which is the least reactive of all the alkali metals

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Li

Na

K

Cs

In ethene molecule how many carbon orbitals are equivalent and degenerate in nature.

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3

4

5

6

Which one of the following is the macronutrient for plants.

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Boron

Zinc

Calcium

Nitrogen

Acetic acid manufactured by

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Distillation

Fermentation

Ozonolysis

Esterification