Question # 1

Concentration is ratio of:

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solvent to solute

solute to solution

solvent to solution

both a and b

Which of following does not belong to p-block?

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IIIA

IVA

VA

VIB

Which of the following compound is not directional in its bonding?

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CH⁴

KBr

CO²

H₂O

The other name of modern periodic table is ________________ of periodic table.

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Long form

Simplified

Simplest

Nil

Electron _____________ energy when thy jump from higher to lower level.

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Absorb

Radiate

Nothing

Nil

Pure alkali metals can be cut simply by knife but iron cannot because of alkali metals have:

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Strong metallic bonding.

Weak metallic bonding

Non- metallic bonding

Moderate metallic bonding

H° + H° are ________________ in energy.

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Lower

Higher

Medium

Nil

Carbon forms ____________ bonds in diamonds.

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4

3

6

9

The property of being polar in nature is called:

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Polarity

Chemistry

Both

Nil

In diamonds, carbon are ____________ bonded.

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Tetrahedrally

Single

Double

None

Ionic compound are ________________ in water.

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insoluble

Soluble

Covalent

Solvent

Petroleum is refined by:

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destructive distillation

fractional distillation

simple distillation

dry distillation

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What is the formula could be of the x:

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C₃H₈

C₆H₁₂

C₄H₁₀

C₂H₁₆

Chloroform is used for

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Anesthesia

Fever

Link

Toys

Photosynthesis process produces.

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Starch

Cellulose

Sucrose

Glucose

Runcid butter has

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Foul smell

Rotten egg smell

Pungent smell

No smell

Ozone is beneficial for us as it absorbs.....................

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Infrared Radiations

Ultraviolet radiations

Chlorofluorocarbons

Air pollutants

How many % age of urea is used as fertilizers?

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80%

90%

95%

98%

Permanent hardness can be removed by using .

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Soda lime

Sodium Zeolite

Quick lime

Lime water

Percentage of carbon in peat is.

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50%

60%

70%

80%

The energy provided by carbohydrates in per gram.

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17 KJ

21 KJ

35 KJ

10 KJ

Just above the Earth's surface is

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Mesosphere

Stratosphere

Theremosphere

Troposphere

the substance which increase the rate of reaction but remains unchanged at the end of the reaction is called.

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Indicator

Promoter

Catalyst

Activated complex

The element nickel has isotopes.

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3

2

5

7

London dispersion force are the only forces present among the.

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Molecules of water in liquid state

Atoms of helium in gaseous state at high temperature

Molecule of solid iodine

Molecules of hydrogen chloride gas

During chromatography strip should be dipped into solvent mixture to a depth of.

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3-4 mm

4-5 mm

5-6 mm

6-7 mm

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

Which of the following wave properties is inversely proportional to the energy for electromagnetic radiations

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Frequency

Wave number

Velocity

Wave length

In silver oxide battery, anode is made of.

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Zinc

Copper

Lead

Graphite

In which system all the three axes are of equal length and all angles are at right angle.

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Cubic

Tetragonal

Orthorhombic

Hexagonal

The number of molecules in one dm³of water is close to

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When a reaction occurs in many steps than the slowest step is.

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Mechanism step

Rate determining step

enthalpy determining step

None of the above

For the equilibrium system N2 + O2 + Heat = 2NO the equilibrium constant deceases by

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Decreasing the temperature

Adding a catalyst

Adding N2

Adding NO

Which nitrogen fertilizer make the soil acdic.

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Calcium nitrate

sodium nitrate

Potassium nitrate

Ammonium nitrate

Ethanol can be converted into ethanoic acid by.

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Hydrogenation

Hydration

Oxidation

Fermentation

Which of the following hydrogen halide is the weakest acid in solution

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HF

HBr

HI

HCl

When hydrolyzed, protein yields.

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Fatty acid

Glycerol

Amino acid

Nucleosides

Which of the following is non-typical transition metal

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Fe

Mn

Zn

Ni

Which compound is more soluble of water

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C2H5OH

C6H5OH

CH3OCH3

n- Hexanol

The solution of which acid is used for seasoning of food.

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

Which substance is used for silvering of mirror.

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Acetaldehyde

Ethanol

Ethylene glycol

Acetone

Which one of the following is not an alkali metal

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Francium

Caesuym

Rubidium

Radium

Colour of K2Cr2O7 is

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Red

Orange

Green

Yellow

Alcohol obtained by fermentation is only upto

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10%

12%

20%

95%