Question # 1

Calendar stock is process in paper making in which

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Moisture is removed

Pulp is spreaded over fabric or screen

Paper thickness is removed

Paper is wounded in the form of reel

A solid nitrate fertilizer reacts with an alkali to produce a gas which turns damp pH paper blue:

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NO₃

NHO₃

NH₂O

N₂H₄O₃

In purification of potable water the coagulant used is:

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Nickel sulphate

Copper sulphate

Barium sulphate

Aluminium sulphate

Polymer formed by the combining of three different monomers is called:

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Homopolymer

Copolymer

Ter polymer

Thermoplastic polymers

One of the following does not give the flame test. Which is that

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Sr

Bа

Be

Na

Which of the following is not a heavy industry?

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Iron

Fertilize

Paper

None

Which one is more toxic?

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Fe

C

Hg

Ag

which of the following is not a symmetrical ketone

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4-heptanone

Butanone

Propanone

3-pentanone

The semi solid wastes in landfills is called:

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Landfill

effluents

Leachate

Incineration

Lipids, proteins, carbohydrates and nucleic acids belong to macromolecules:

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inorganic

organic

Biopolymer

synthetic

One atmosphere is equal ___________ Pascal

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760

101325

14.7

1.01325

A dry alkaline cell has porous Zn anode and MnO₂as cathode the electrolyte used is

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Ca(OH)₂

NaOH

KOH

NH₄OH

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

White phosphorus is

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A mono atomic gas

P₄, a tetrahedral solid

P₈, a crown

A linear diatomic molecule

The difference between amount of heat actually released and that of calculated is called

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Bonding energy

Activation energy

Resonance energy

Transition energy

The molarity of toluene solution in benzene is 0.22 if 5 grams of toluene dissolved, then mass of benzene is grams is

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267

260

240

247

A fuel has the same knocking property as a mixture of 70 isooctane (2, 2, 4- trimethyl pentane) and 30% n-heptane by volume the octane number of the fuel is

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100

70

50

40

Reason of pollution are:

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Population and Urbanization

Transportation

Urbanization industrialization

All of these

Monosaccharides are

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Aldoses

Ketoses

Either a and b

None of these

For which system does the equilibrium constant, KC has units of concentration

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Naturally occurring lipids are called

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Fats

protein

Steroids

None

Doberiner arranged the similar elements into

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Pairs

Triads

Triplets

Rows

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