Question # 1

Value of Avagadro's number is.

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6.6 x 10^-20

6.02 x 10²³

6.00 x 10²⁴

1.32 x 10²³

Hydrogen bound ing is always found in

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Non-polar molecules

Homoatomic molecules

Polar Molecules

All of the above

Actinide series starts after the element

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Actinium

Lanthanum

Osmum

Silver

Atomic number of actinium is

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57

60

89

80

Every atom has a natural tendency to accommodate electrons in its valence shell

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2 or 6

2 or 4

2 or 8

2 or 10

How many atoic mass units (amu) are there in one gram.

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1 amu

6.022 x 10²³

10 amu

6.022 x 10²²

Number of electronsin nitrogen molecule is.

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2

4

6

8

Whcih types of bond is present between NH3 and BF3

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Covalend Bond

Ionic Bond

Co ordinate covalent bond

Metallic Bond

Which branch of chemistry give information about starch syntehsis in plants?

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Biochimstry

Organic chemistry

Environmental chemistry

Inorganic Chemistry

How many blocks are presnt in modern periodic table

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2

3

4

5

An element has 5 electrons in M shell. Its tomic number is.

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5

10

15

20

Which one of these protects us against the disease;

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Carbohydrates

Lipids

Proteins

all of these

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

Lipids are macromolecules made up of.

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Fetty acids

Amino acids

Nucleotides

None of them

Which one of the following diseases causes liver inflammation?

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Typhoid

Jaundice

Cholera

Hapatitis

Which one of the following is Lewis base?

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NH₃

BF₃

H⁺

AlCl₃

Arrhenius presented his concept about acids and bases in.

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1785

1787

1923

1930

___________ is not green house effect.

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Increase of food chain

increase atmospheric pressure

Increase of sea level

Increase of flood risks

Which colour of HI is ?

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Orange

Purple

Red

Colourless

Which one of the following salts makes the water permanent hard.

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

Who proposed "Law of mass action"?

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Newton

Boyle

Guldberg and waage

Lavoisier

How many % age of nitrogen in urea fertilizers?

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40.6

45.6

46.6

50

A pressure cooker reduces cooking time because.

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Heat is uniformly distributed

Boiling point of water rises

A large flame is used

Vapour pressure of liquid reduces

Dipole moment is defined as.

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Charge x distance

Charge x Debye

Charge x displacement

Charge x bond energy

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

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Remains uncharged

Increase four time

Reduce to 1/4

Be doubled

Which mixture of gases is used by the deep sea divers.

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Oxygen and nitrogen

Oxygen and helium

Oxygen and carbon di oxide

Oxygen and water vapours

The real gas obeying Van der Waal's equation will resemble ideal gas is.

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both 'a' and 'b' are large

both 'a' and 'b' and small

'a' is small and 'b' is large

'a' is large and 'b' is small

Photosynthesis a photochemical reaction has order of reaction

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0

1

2

Fractional order

27g of Al will react completely with how much mass of O2, to produce Al2O3.

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8 g of oxygen

16 g of oxygen

32 g of oxygen

24 g of oxygen

Which one of the following gases diffuse more rapidly.

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Cl2

CO2

CH4

N2

The Van der Waals' equation explain the behaviour of.

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Ideal gas

Real gas

Vapours

Non ideal gases

The lightest value of lattice energy is for which one of these ionic compounds.

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NaI

NaF

NaBr

NaCl

In triclinic unit cell

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All axial lengths are equal

All internals lengths and angles are equal

Both axial lengths and angles are equal

Both axial lengths and angles are unequal

Which of the following are alkaline earth metals?

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Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

------------- metal is used in the Thermite process because of its reactivity

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Tron

Copper

Aluminium

Zinc

The news paper can be recycled again and again as many times as

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5

3

4

2

Which element shows highest oxidation state among these

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Zn

Fe

Mn

Sc

Setting of Plaster of Paris is accompanied with

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Hydrogen bonding

Hydration

Dehydration

None of these

Which of the following is not a fatty acid

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

In which compound, the oxidation state of boron in not +3

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H2BO3

Ca2B2O11

Na2B4O7

Mg3B2

Which of the following compounds will not give Iodoform test on treatment with I₂/ NaOH

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Acetaldehyde

Acetone

Butanone

3-Pentanone

The most reactive alcohol when O-H bond breaks is

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Tertiary alcohol

Secondary alcohol

Primary alcohol

Methyl alcohol

Which one of the following does not belong to alkaline earth metals.

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Be

Ra

Ba

Rn

In which group, melting point and boiling point increase downward in a group

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IA

II A

VII A

Both a and b