Question # 1

The voltage Nickel Cadmium cell is

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1 V

1.2 V

1.4 V

1.6 V

Which of the following molecules has zero dipole moment

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NH₃

CHCI₃

H₂O

BF₃

The rate of reaction determined at any given time is called.

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Average rate

Instantaneous rate

Spontaneous rate

Over all rate

A filtration process could by very time consuming if it were into aided by a gentle suction which is developed.

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If the paper covers the funnel upto its circumference

If the paper has got small sized pores in it.

If the stem of the funnel is large so that it dips into the filtrate

If the paper fits tightly

When one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide.

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Diamond

C2H6

Methane

CO2

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

Which of the following has highest percentage ionic character.

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HCl

HF

HBr

HI

The S.I. units for the molar heat capacity are

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Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

In mass spectrometry, ions are produced by

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Heat at high temperature

Passing gas through high voltage plates

Throwing fast moving electrons on gas molecules

All of them

The Number of moles of CO2 which contain 8.0 of oxygen.

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0.25

0.15

0.35

1.45

What is the oxidation state of sulphur in SO3^2-

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-4

-2

+2

+4

According to MOT, which molecular orbital has highest energy.

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sigma 1s

pi+ 2S

pi 2py

Pi+ 2px

The molarity of 2% w/v NaOH solution is

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2

0.25

0.05

0.5

In discharge tube, properties of X-rays depend upon the nature of.

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Residual gas

Cathode plate

Anode plate

All of these

Maximum number of electrons in f-subshell is.

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2

6

10

14

If strip of Cu metal is placed in the solution of FeSO4

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Cu will be precipitated out

Fe is precipitated out

Cu and Fe both dissolves

No reaction takes place

The line of the balmer series in the visible region of the spectrum, but the limiting line, in the series lies in

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Visible region

X-Ray region

I.R region

U.V. region

When water freezes, its volume increase.

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12%

9%

15%

18%

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