Question # 1

Main group elements are arranged in ..............groups.

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7

6

8

10

The colour of anhydrous copper (II)sulphate solid is

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Pink

Black

White

Blue

How many elements are present in 6th period.

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2

8

18

32

The compund formed by oppoite charges are known as.

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Metallic solids

Ionic compounds

Non-polar Covalent compound

None of the above

Which one of the suspension.

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Chalk in water

Tootpast

Ink

Blood

Nitrogen molecule contains.

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Polar covalent bond

Triple Covalent bond

Double covalent bond

Single covalent bond

Ammonia is a base, because it

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Ionizes in water to give OH- Ions

Can accept proton

Contains OH group

Can accept an election pair

How is radio carbon dating useful for archeolgists.

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It helps detemine whether the matter is radioactie or not

It helps determine the age of organic matter

It helps determine the composition of matter

It helps deterime the usefulness of matter

How many electrons are involved in the formation of signle covalent bond

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One

Two

Three

Four

Aerobic respiration releases........energy than anaerobic respiration.

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Equal

Less

More

None of these

The word acid is derived from the.

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Greek word

Latin word

English word

Arabic word.

Hydrogenation of vegetable oil to convert it into banaspatic ghee is carried out in the presence of catalyst:

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Ni-metal

Zn-metal

Na - Metal

Fe2O3

General formula of Alkane is.

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C₁₀H_2n-2

C₆H₂₆

C₁₁H_2n-2

C_nH_2n-2

when a system is in equilibrium state or in dynamic equilibrium state.

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Reactants and product are equal

Forward reactions stops

Reverse reactions stops

Forward reaction rate and reverse reaction rate

Concentration is process of:

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Mixting technique

Separating technique

Boiling technique

Cooling techique

Which one of the following is a synthetic fiber:

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cotton

wool

nylon

silk

Which one of the following is non- reducing in nature;

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glucose

fructose

starch

sucrose

Photosynthesis process produces.

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Starch

Cellulose

Sucrose

Glucose

Neurological damage is caused by the poisoning of.

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Lead

Cadimium

Mercury

All of them

99% of atmosphere consists of .

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N₂and H₂

N₂and O₂

N₂and CO₂

O₂and CO₂

Which element has highest ionization potential.

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Li

B

Be

C

Gas molecules show more deviation from ideal behaviour at high pressure because.

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Velocity of molecules increases

Velocity of molecules decreases

Force of attraction between molecules increases

Force of collision per unit area increases

The number of moles of hydrogen atoms in 3.2 g of methane CH4.

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0.2

0.4

0.6

0.8

When 5d orbital is completed them entering electron goes into.

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6s

6p

6d

6f

If the energy of the activated complex lies close to energy of reactants, it means that reaction is

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Slow

Fast

Exothermic

Endothermic

Which of the following solution s has the highest boiling point.

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5.85% solution of sodium chloride

18.0 % solution of glucose

6.0% solution of urea

All have the same boiling point

Relative lowering of vapour pressure is equl to.

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Mole fraction of solute

Mole fraction of solvent

Molarity

Molality

The cell in which a non spontaneous redox reaction takes place as a result of electricity is known as.

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Voltaic cell

Denial cell

dry Cell

Electrolytic cell

In NICAD dry cell, the cathode and anode is made up of.

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Ca and Ag

Ni and CdO2

NiO2 and Cd

Ag and Ag2O

Rutherford's model of atom failed because.

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The atom did not have a nucleus and electron

It did not account for the attraction between protons and neutrons.

It did not account for stability of the atom

There is actually no space between the nucleus and the electrons.

Ethers show the phenomenon of

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Position Isomerism

Functional group isomerism

Metamerism

Chain isomerism

The substance that retard the activity of enzyme is called.

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Co enzyme

Epo enzyme

Activity

Substrate

Which one is basic amino acid

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Lysine

Alanine

Glycine

Aspartic acid

Boiling point range of petroleum ether.

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5- 20 ^oC

10- 30^oC

20- 60^oC

30- 90^oC

Magnesium metal does not burn in the jar of

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N2

O2

Ne

N2 and O2

Which halogen will react spontaneously with Au_(s)to produce Au³⁺

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Br₂

F₂

I₂

Cl₂

Which class of compounds can not show positional isomerism.

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Alkanes

Alkene

Alkynes

Alcohol

Which compound is the most reactive

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Benzene

Ethene

Ethane

Ethyne

Ammonium nitrate fertilizers is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

Which one of the following species is meta director if present at benzene ring.

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-NO2

-Cl

-CH3

-OH