Question # 1

In elimination reaction i.e, in the formation of alkene, the reactivity of alkyl halide is in the order:

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CI>Br>I

I>Br>Cl

Br>CI>I

I>CI> Br

The law of distribution of energy is given by

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Clausius

Maxwell

Bernoulli

Boltzmann

Beryllium differs from other elements of group Il-A due to

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high charge density

comparatively high nuclear charge

small radius

all above

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 is not an air pollutant

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N₂

CO

NO

N₂O

Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of

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2 day

6 day

5 day

7 day

Equal volume of all gases at same temperature and pressure contain number of molecules

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different

multiples

equal

in fractions

The word paper is derived from the name of which reedy plant

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rose

sun flower

papyrus

water hyacinth

Enzymes have been classified on the basis of

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protein structure

prosthetic groups

type of reaction they catalyse

bonding in them

1, 3, 5-Pentanetriol has secondary carbon

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3

1

2

Zero

What is the weight of 10 dm³of CO₂at 27°C and 2 atm?

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89.3 g

56.1 g

125 g

127 g

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Q and R Q and R

R only Q and R

Q and R R only

Q only R only

3.6% WN solution of HCI has the molairity

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1.0

1.15

0.98

1.98

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

The destructive distillation of coal gives three products. What is not the product of destructive distillation of coal

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Coal gas

Carbon dioxide

Coal tar

Coke

A macroscopic property of a system which describes the initial and final state of the system is called

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Physical property

Chemical property

Energy property

State function

Electronegativity values of the elements F, CI and Br vary

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F > CI > Br

Br > CI > F

Cl > Br > F

CI > F > Br

which of the following has smaller size:

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Fe+³

Fe+²

Fe+¹

Fe

The pressure of vapours when sent to the ionization chamber in mass spectrometer is

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10^-5to 10^-6torr

10^-6to 10^-7torr

10^-7to 10^-8torr

10^-3to 10^-4torr

German silver does not contain

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Cu

Zn

Ni

Mn

The value of Plank's constant 'h' is

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6.625 x 10^-34

6.625 x 10^-34J sec

6.625 x 10^-34KJ

6.625 x 10^-34K Cal

The process of electrical coating of one metal on another to protect, decorate or to have greater resistance to corrosion is called

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Electroplating

Electrolysis

Conduction

Induction

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