Which of the following statement is inco...

Which of the following statement is incorrect

Be and Mg are inert to oxygen and `H_(2)O`

Concentrated solutions of alkaline earth metals in `NH_(3)` are bronze coloured

`Ca,Sr` and `Ba` reacts with cold `H_(2)O` forming hydroxides and liberating `H_(2)` gas

Oxides and hydroxides of alkaline earth meals are more ionic and more basic than that of alkali metals.

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The correct Answer is:

Basic and Ionic nature of IA group elements are more than Iia Group elements.

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Which of the following statements is incorrect ?

Particle nature of radiations can be experimentally demonstrated by Compton effect

Wave nature of electrons can be experimentally domonstrated by diffraction experiment

The value of Planck's constant, h is `6.62 xx 10^(-34) Js`.

Intensity of light is directly proportional to its frequency.

Evolutionary biologists believe that the success of mammals is largely due to their ability to maintain a constant body temperature

The mechanisms used by most mammals to regulate their body temperature 'are similar to the ones that humans use

Plants do not have such mechanisms to maintain internal temperatures

An overwhelming majority of animals and nearly all plants can maintain a constant internal environment.

A person of 'o' blood group has anti 'A' and anti 'B' antibodies in his blood plasma

A person of 'B' blood group can't donate blood to a person of 'A' blood group

Blood group is designated on the basis of the presence of antibodies in the blood plasma

A person of AB blood group is universal recipient.