Question # 1

Which of the following is the repeating monomeric unit in cellulose?

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sucrose

maltose

cellobiose

glucose

The emf produced by galvanic cell is called

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Cell potential

Oxidation potential

Redox potential

Reduction potential

which of the following d blocks element can showthe highest oxidation number is its ompound

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Chromium

iron

Copper

Manganese

Chemicals used to kill insects are:

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Herbicides

Insecticides

Pesticides

Fungicides

The transition temperature of tin is

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95.5 C°

13.2 C°

13.2°C

128.5°

The reagent used to distinguish between ethanol and propanal is

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I2/ NaOH

Benedict's reagent

LiAIH

sodium nitroprusside

Ethanoic acid reacts with PCI5, to give ethanoyl chloride. HCI and a third compound What is the third compound

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H3PO3,

POCI3

SO2

COCl2

Which of the following laws study the pressure-volume relationship of a gas at constant temperature,we get

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a straight line

a curve with different peaks

straight line parallel to x-axis

a curve called isotherm

Ar has low critical temperature and pressure due to its

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small size

monatomic molecule

low polarizability

liquefaction temperature close to room temperature

Which of the following contains I mole of the stated particles

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Chlorine molecules in 35.5 g of chlorine gas

Electrons in 1 g of hydrogen gas

Hydrogen ions in 1 dm³ of 1 mol dm¯³ aqueous sulfuric acid

Oxygen atoms in 22.4 dm³ of oxygen gas at STP

Which of the following best describes the shape and polarity of the carbon disulphide molecule?

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Bent and polar

Linear and non-polar

Pyramidal and polar

Bent and non-polar

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH₄or LiAIH₄?

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1-propanol

2-propanol

2-Methyl-2-propanol

Ethanol

In exothermic reaction decrease in potential energy of the products will result in

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Decreases in kinetic energy of the particles

Increases in kinetic energy of the particles

No change in kinetic energy

Decreases in activation energy

The process in which solvent particles surround solute particles is called

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Hydrolysis

Hydration

Solvation

Dissolution

The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to

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4-Bromobenzyl cyanide

4-Cyanobenzyl chloride

4-Cyanobenzyle cyanide

4-Bromo 2-cyanobenzyl chloride

Components of environment are:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Kinetic energy of the molecules is due to

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Transnational motion

Rotational motion

Vibrational motion

All of these

The solubility of a gas in water depends upon

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Nature of the gas

Temperature

Pressure of the gas

All of the above

Coordination number of Pt in [Pt Cl(NO₂) (NH₃)]^2-is

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2-

4

1

6

Carbolic acid is the other name for

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Methanol

Ethanol

Propanol

Phenol

Which of the following pairs are chemically dissimilar?

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Na and K

Ba and Sr

Zr and Hf

Ca and Zn

Increasing skin cancer and high mutation rate are due to

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Acid rain

Ozone depletion

CO pollution

CO₂Pollution

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