Question # 1

An exothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products

Addition of iron filling to CuSO₄solution caused precipitation of Cu awing to the

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Reduction of Cu²⁺

Oxidation of Cu²⁺

Reduction of Fe

Reduction of Fe³⁺

Gooch crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysus

Which has the largest radius?

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CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

The rate of a reaction that does not involve gases does not depend upon

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Pressure

Temperature

Concentration

Catalyst

Leblanc process is employed in the manufacture of

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Baking soda

Washing soda

Potash

Plaster of paris

Which of the following represents elements in order of increasing atomic size?

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I,Br,CI

Na,Mg,C

C,N,O

Li,Na,K

Sulphure dioxide affects

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Cell wall

Plasmodesmata

All membrane systems

Nucleus

The maximum number of electrons in a subshell for which / = 3 is

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14

10

8

4

ΔH_{Neutralisation} is always

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Positive

Negative

Zero

Positive or negative

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

Which of the following belongs to the halogen family?

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Francium

Polonium

Radium

Astatine

The wire in the flash bulbs is made up of

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Mg

Ba

Cu

Ag

Which of the following is an example of body centred cube?

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Magnesium

Zinc

Copper

Sodium

Which of the following geometry is associated with the compound in which the central atom assumes sp³d hybridization?

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Planar

Pyramidal

Angular

Trigonal bipyramidal

Which of the following is monoatomic?

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Oxygen

Neon

Fluorine

Nitrogen.

If a salt bridge is removed electrode is made from which of the following?

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ZnCl₂

CuSO₄

Hg₂Cl₂

HgCl₂

Which for the following has greatest reducing power?

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Hl

HBr

HCl

Hl

In the manufacture of iron from haematite, limestone is added to act as.

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Flux

A reducing agent

Slag

An oxidizing agent

The total pressure exerted by a number of non-reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

Carbon monoxide is pollutant as it

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Inactivates nerves

Inhibits glycolysis

Combines with oxygen

Combines with hemoglobin

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