Either two double bonds or one triple bond

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Explain modes of vibration in carbon dioxide.

Important Questions on Measurement and Data Processing

EASY

Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

A metallic rod breaks when strain produced is

0.2 %

. Young's modulus of the material of the rod is

7 \times 10^{9} N m^{- 2}

. What should be its area of cross-section to support a load of

10^{4} N

EASY

Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

A metal rod of cross-sectional area

3 \times 10^{- 6} m^{2}

is suspended vertically from one end has a length

0.4 m

100 ° C

. Now the rod is cooled upto

0 ° C

, but prevented from contracting by attaching a mass

m

at the lower end. The value of

m

is (

Y = 10^{11} N m^{- 2}

, coefficient of linear expansion

= 10^{- 5} K^{- 1}, g = 10 m s^{- 2}

)

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

Write copper, steel, glass and rubber in order of increasing coefficient of elasticity.

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

Which of the following options possess compounds with the same general formula?

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

The load versus elongation graph for four wires of the same material is shown in figure. The thinnest wire is represent by the line -

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HARD

Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

According to Hooke's law of elasticity, if stress is increased, then the ratio of stress to strain

HARD

Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

A 20 cm long rubber string obeys Hooks law. Initially when it is stretched to make its total length of 24 cm, the lowest frequency of resonance is

υ_{0}

. It is further stretched to make its total length of 26 cm. The lowest frequency of resonance will now be :

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

A wire

(Y = 2 \times 10^{11} N m^{- 2})

has length 1 m and area

1 {mm}^{2}

. The work required to increase its length by 2 mm is

EASY

Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

The frequency of nuclei relative to the standard in NMR spectrum is called _____.

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

The adjacent graph shows the extension

(Δ l)

of a wire of length

l m

suspended from the top of a roof at one end and with a load

W

connected to the other end. If the cross-sectional area of the wire is

10^{- 6} m^{2}

, calculate the Young's modulus of the material of the wire -

Δ l (\times 10^{- 4} m)

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

Which of the following statements are correct?

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

Degree of unsaturation in the following compound is

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

The length of an elastic spring is $a$ metres when a force of $4 N$ is applied, and $b$ metres when the $5 N$ force is applied. Then the length of the spring when the $9 N$ force is applied is

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

If Hooke's law is obeyed, then the restoring force is

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Which of the following substances has the highest elasticity?

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

In infrared (IR) spectroscopy the region

300 - 1400 {cm}^{- 1}

is called _____ region.

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

C_{4} H_{6}

may contain-

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

X-rays are used in determining the molecular structure of crystaline because

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Chemical shift is measured in _____(ppm/ppb)

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Chemistry>Physical Chemistry>Measurement and Data Processing>Spectroscopic Identification of Organic Compounds

Tetramethyl silane gives only one sharp absorption, which is called as a _____(Peak/frequency).

Explain modes of vibration in carbon dioxide.

Important Questions on Measurement and Data Processing

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