Question # 1

Bucky molecules have ________________ c-atoms.

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20-60

20-90

40-60

40-100

The core of the earth is mostly made from ____________

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Nickel

Iron

A % B

Copper

4th & 5th consist of ________________ elements.

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8

18

32

infinite

The earth is made up of ___________ % of iron.

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4

5

6

7

The atomic number of sodium is ............... .

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9

10

11

12

The mathematical formula of Boyle's law is:

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PV = k

PT = k

V = kT

T = Vk

Which one of the following is heterogeneous mixture?

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milk

ink

milk of magnesia

sugar solution

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

Non-metals are generally soft, but which one of the following is extremely hard?

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Graphite

Phosphorus

Iodine

Diamond

Considering the electronic configuration of atoms which atom with the given atomic number will be the most stable one?

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6

8

10

12

The mathematical formula of Charle's law is:

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PV = k

V/T = k

P = VT

T/V = k

Ozone is an allotropic form of

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Carbon

Oxygen

Sulphur

Phosphorous

Law of Mass Action was put forward by:

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G.N.Lewis

Lowry

Arrhenius

Gulbderg and Waage

Concentration is a .

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Mixing technique

Separating technique

Boiling technique

cooling technique

If a liquid has a pH of 7 then it must.

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Be a colourless and odourless liquid

Freeze at 0 ^oC and boil at 100 ^oC

Be natural

Be a solution containing water

The region in which ozone layere depletes is called.

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Ozone hole

Black hole

Both of them

None of them

Uric Acid is present in

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Apple

Fats

Urine

Grapes

Chemical formula of chloroform.

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CH₃Cl

CH₂O₂

CHCl₂

CCl₄

Compound of metal exist under earth crust are called.

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Ore

Gangue

Minral

None of these

The rate of reverse reaction in the beginning.

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Slow

moderate

Very fast

Low

What is the pOH of Ca(OH)2, 0.02 M Solution.

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1.698

1.397

12.31

12.61

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

If absolute temperature of gas is doubled and the pressure is reduced to one half, the volume of the gas will.

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Remain unchanged

Increase four times

Reduce to 1/4

Be doubled

Which statement about Gooch crucible is incorrect.

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It is made up of porcelain

Quick filtration occur by using suction filtering apparatus

All the chemicals which reacts with paper can be filtered.

Filter medium used in this crucible consists many folds of filter paper only.

K_aand K_bof a conjugate acid and are related with k_was

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K_a+ K_b=K_w

K_a-K_b=K_w

K_a.K_b= K_w

K_a/ K_b= K_w

_________ was derived by C.M Guldberg and P Waage in 1864

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Law of conservation of Mass

Law of mass action

Law of conservation of energy

Distribution law

The sum of mole percent of all the components of solution is always equal to.

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Unity

100

Less than one

Less than 100

Which one of the following molecule have angle of 120 ^o

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Be Cl2

BF3

CH4

NH3

Which one of the following salts do not hydrolyses

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CuSO4

Na2CO3

NaCl

AlCl3

The effect of temperature on equilibrium was studied by

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Lewis

Van der wall

Arrhenius

Vant hoff

A substance which rerareds the rate of a reaction is called

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Inhibitor

Activator

Auto-catalyst

None of these

______ Molecule has zero dipole moment.

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CO

H2S

SO2

CH4

Which pair of mixture is called ideal solution.

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Chlorobenzene and bromobenzene

Water alcohol

Water ether

HCl and water

What criteria did Mendeleev use in arranging his periodic table.

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Atomic mass

Atomic number

Mass number

Density

Which of the following are alkaline earth metals?

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Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

Chemical formula of stibnite on.

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BaSO4

Sb2S3

FeS2

ZnS

The electrophile in Aromatic sulphonation is

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H₂SO₄

HSO₄^1-

SO₃

SO₃¹⁺

Which gas act as 'Blistering agent'

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Acetylene

Phosphine

Phosgene

Mustard gas

Which one of the following plastic is a thermosetting plastic.

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PVC

Polystyrene

Polyethene

Bakelite

Essential amino acids are those which

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Are present in every protein

Must be supplied to body through diet

Contain two carbocyclic acid and one amino group

Is syntherised by our body

Chile saltpeter has the chemical formula

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NaNO3

KNO3

Na2B4O7

Na2CO3.H2O

Woody raw material for paper pulp is obtained from

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Cotton

Bagasse

Poplar

Rice straw

Which one is neutral amino acid

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Lysine

Histidine

Glutamic acid

Valine

According to Lewis concept ethers behave as

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Acid

Base

Acid as well as a base

Noe of them