Question # 1

Which pair of elements will have the same type of bonds between their atoms in the solid state?

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carbon and calcium

lithium and boron

aluminium and phosphorus

nitrogen and carbon

Which of the following is not a charbohydrate

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Nuclic acid

Starch

Glycoyen

Cellulose

Which of the following is a non-typical transition element?

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Cr

Zn

Mn

Fe

Albumin, globin and casein are

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Milk proteins

Plasma proteins

Egg proteins

Meat proteins

A polymer of PVC having D.P 500 has molar mass:

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6300

63000

3150

31500

Group VIB of transition elements contains

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Zn. Cd. Hg

Cr. Mo, w

Fe. Ru, Os

Mn. Te. Re

Oceans, rivers, streams, lakes, polar ice caps, glaciers and group water reservoirs are included in:

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atmosphere

lithosphere

hydrosphere

biosphere

Water is purified by:

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Filtration

aeration

coagualation

All of these

In which of these processes are smell organic molecules changed into macromolecules

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The fractional distillation of crude oil

The cracking of petroleum fraction

The hydrolysis of proteins

The polymerization

How many CI^- ions are there around Na+ ion in NaCI crystal?

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3

4

6

8

Which one of the following is not true relationship

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Ketones are prepared by the oxidation of:

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

Which of the following is an aromatic compound

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Propanol

Cyclohexane

Acetone

Benezene

Which of these reactions is shown by buranone, CH₃COCH₂CH₃

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On warming with acidified potassium dichromative (IV) the solution turns green

On heating with Fehling's reagent a red precipitate is formed

With 2,4-dinitrophenlhydrazine reagent an orange precipitate is formed

With hydrogen cyanide an aldehyde is formed

Rate law of an equation is obtained :

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From a balance equation.

Can be calculated theoretically as well as determined experimentally.

It is only calculated theoretically.

Experimentally.

How does the ionization energy of 1st group elements vary?

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Increases down the group

Decreases down the group

Remains unchanged

Variation is not regular

The raw material to form nylon is

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Adipic acid

Butadiene

Isoprene

Ethylene

Which of the following element has the maximum electron affinity?

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F

S

I

Cl

pKb value of NH₄OH is 4.74. If the concentration of NH₄OH is 1 molar containing 0.1 molar NH₄Cl, then pH of this buffer will be

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3.74

10.26

4.74

9.26

A beaker contains 9 grams of water. The number of H atoms is

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6.02 x 10²³

3.01 x 10²³

6.02 x 10²⁴

3.01 x 10²⁴

The hydration energy is the heat evolved when one mole of gaseous ion is dissolved in water. The hydration energy of an ion

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Increases with increase of charge to mass ratio

Decreases with increase of charge to mass ratio

Depends on sign of charge +ve or -ve

Depends upon the solvent

E₁mechanism is generally shown by

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1° - RX

2° - RX

3° - RX

None of these

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