Which of the following statements is/are...

Which of the following statements is/are correct?

Spiro compounds contain fused rings at quarternary carbon

Bicyclo compounds contain two rings connected by bridge

Bicyclo compounds can be bridged or fused.

Lower Cyclic alkynes are unstable.

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The correct Answer is:

A, B, C, D

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Which of the following statement is/are correct ?

Average speed of a particle in a given time period is never less than magnitude of average velocity

It is possible to have situation in which `|(d vec(v))/(dt)| !=0` but `(d|vec(v)|)/(dt)=0`

It is possible to have situation in which `(d|vec(v)|)/(dt) != 0` but `(|d vec(v)|)/(dt) =0`

The average velocity of a particle is zero in a time interval. It is possible that the instaneous velocity is never zero in the interval.

The decay constant is independent of external factors like temperature and pressure

Nuclear isomers have same number of protons and neutrons

The decay constant is independent of the amount of the substance used

The value of decay constant generally decreases with the rise in temperature

Metallic hydries are deficient in hydrogen

Metallic hydrides conduct heat an electricity

Ionic hydrides do not conduct electricity in solid state

Ionic hydrides are very good conductors of electricity in solid state