Question

3. The metal which melts in water to form a silvery ball and then burns to form golden yellow
4. A metal which in red hot state reacts with steam to form hydrogen, such that the reaction is teve
OBJECTIVE TYPE QUESTIONS
I Multiple choice uestions : Choose the correct answer from the options given below:
1. Hydrogen occurs in combined state in :
a) water (b) animal cells
(c) natural gas
2. The metal which does not react with cold water to liberate hydrogen gas is :
(a) Na
(b) K
(c) Ca
(d) AI
(a) calcium
(b) sodium
(c) magnesium
(d) all of these
(d) potassium
(a) magnesium
(b) iron
(c) aluminium
(d) zinc
5. A metal which does not react with cold and dilute sulphuric acid is :
(a) iron
(b) magnesium
(c) copper
(d) zinc​

Answer 1

Metamorphosis is a biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation.

Answer 2

Answer:

Sodium

Sodium is a very active element. It combines with oxygen at room temperature. When heated, it combines very rapidly, burning with a brilliant golden-yellow flame. Sodium also reacts violently with water.

Explanation:

Answer of the first question.