Advertisements
Advertisements
प्रश्न
What happens when calcium is treated with water?
- It does not react with water
- It reacts violently with water
- It reacts less violently with water
- Bubbles of hydrogen gas formed stick to the surface of calcium
पर्याय
(i) and (iv)
(ii) and (iii)
(i) and (ii)
(iii) and (iv)
उत्तर
(iii) and (iv)
Explanation -
Calcium reacts slowly with water. If a piece of calcium is dropped into a non-reactive container containing water after some times bubbles of hydrogen gas are seen stuck to the surface of the metal.
APPEARS IN
संबंधित प्रश्न
Answer the following question.
List in tabular from three chemical properties on the basis of which we can differentiate between a metal and a non-metal.
The electronic configurations of three elements X, Y and Z are X - 2, 8; Y - 2, 8, 7 and Z - 2, 8, 2. Which of the following is correct?
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?
Which of the following can undergo a chemical reaction?
A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.
Generally metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red?
Which non-metal is used to disinfect water?
A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.
