Advertisements
Advertisements
प्रश्न
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
Advertisements
उत्तर
(b) sulphur
Because sulphur reacts with hydrogen to form a covalent hydride, H2S that has the smell of rotten eggs.
APPEARS IN
संबंधित प्रश्न
Write equations for the reactions of calcium and potassium with water.
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions of iron sulphate and copper sulphate. In the second part of her experiment, she added iron metal to another test tubes C and D containing aqueous solutions of aluminium sulphate and copper sulphate.
In which test tube or test tubes will she observe colour change? On the basis of this experiment, state which one is the most reactive metal and why.
Which of the two metals is more reactive: copper or silver?
What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
What special name is given to substances like aluminium oxide.
What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water:
Zinc, Iron, Magnesium, Sodium
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
Which non-metal has been placed in the reactivity series of metals?
An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag
An element is soft and can be cut with a knife. If is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be:
(a) Mg
(b) S
(c) P
(d) Na
If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?
What is the characteristic of the electronic configuration of noble gases?
Which one among the following is an acidic oxide?
The substance that will be flattened on beating with a hammer is ______.
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
Tungsten wire is used in electric bulbs.
