Question # 1

The element which exhibits maximum catenation property is

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C

Pb

Ge

Sn

Irreversible precipitation of protein caused by heating is called

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Polymerization

Denaturing

Inversion

Co-angular

During the electrolysis of Fused NaCI, the products are

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Na and H2

Na and Cl2

Na and O2

H2 and Cl2

According to charles law there will be a change in the volume of a given mass of a gas by 1/273 of its original volume at 0°C if the temperature of the gas is changed by

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10°

1°C

100°C

2°C

One of the following can produce greater number of moles of ethyl chloride on reacting with escess of ethanol

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PCI5

PCI3

HCI/ZnCl2

SOCI2

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

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Blow air

Add Na₂CO₃

Use a specially made sorbent having fluorine trapped in it

Use a sorbent having Al₂O₃trapped in it

Nitro alkanes exhibit the:

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Chain isomerism

Positional isomerism

Functional group

Metamerism

One mole of a gas refers to

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The number of molecules in one litre of gas

The number of molecules in one gram of gas

The number of molecules contained in 12 grams of ¹²C isotope

The number of molecules in 22.4 liters of a gas at S.T.P.

Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:

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Live stock wastes

Oil spilage

detergents

pesticides

Which is not a steroid

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Cholesterol

Ergosterol

Phospholipids

None of these

Macro-nutrients are required in quantities ranging from

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5 kg - 200 kg

2 kg - 100 kg

1 kg - 50 kg

10 kg - 100 kg

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In the extraction of iron, slag is produced which is

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CO

FeSiO₃

MgSiO₃

CaSiO₃

Which of the following is not isoelectronic?

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Na⁺

Mg²⁺

O^2-

Cl^-

In passage of electricity through aqueous solution of AgNO₃silver dissolves at anode to form Ag⁺, the electrodes are

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Silver metal

Pt metal

Graphite

Copper metal

Plastics are a pollution problem because many plastics

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Are made from petroleum

Are very inflammable

Burn to produce toxic fumes

Decompose to produce toxic products

Iodoethane reacts with sodium in ether, the product formed is

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Pentene

Propyne

Butene

Butane

The electron affinity of chlorine may be represented by the equation

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2SO₂ + O₂ ⇌ 2SO₂H= 188KJ mole^-1

Which statement about following equilibrium is correct :

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The value ofK_pfalls with arise in temperature.

The value ofK_pis equal tok_c.

The value ofK_pfalls with the increase pressure.

Adding V₂O₅ catalyst increase the equilibrium yield of Sulphur trioxide.

The colour of ppts formed by Fehling's test is

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Brick red

Red

Yellow

Orange

The bond angle depends upon the

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Types of bonds

Number of bonds

Non-bonding electron pairs

All of the above

Iron, once dipped in concentrated H₂SO₄, does not displace copper from copper sulphates solution, because

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It less reactive than copper

A layer of sulphates is deposited on it

An inert layer of iron oxide is deposited on it

All valence electrons of iron are consumed

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