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Which of the following metal does not undergo corrosion due to the formation of oxide layer -

A bomb explodes on the Moon. How long will it take for the sound to reach the Earth?

If the Volume of a cubic cell is 10^-30 metre3 then its lattice parameter is :

Orientation of atomic orbital is controlled by

The colour of the carrots is due to the presence of

The sky seems blue as of

Which of the following metal forms Amalgam with other metals?

A bomb explodes on the moon. You will hear its sound on earth after _

Colloids are purified by

If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated -

Orology’ is the study of

The colour of the ocean seems to be blue as the sunlight falling on it is

The slope of a velocity - time graph gives

Which among the following hormone has a stimulatory effect on the heart?

Which of the following metal has least melting point?

A bomb is dropped at a point from a moving aeroplane. The pilot observes that

Colour imparted to the Bunsen flame by strontium salt is

If water in a lake were to behave like other liquids, then in extremely cold weather it would freeze

Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with

The colour of violet glass is due to the presence of

The so-called fourth state of matter refers to

Which among the following is a character of Chloroplast which makes them qualified to self replication?

Which of the following metal ion is needed to form poly-ribosomes from ribosomes?

A bottle of sodalime is grasped by the neck swung briskly in a vertical circle, Near which portion of the bottle do the bubbles collect -

Combustion is a