Advertisements
Advertisements
प्रश्न
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
विकल्प
Iron
Sodium
Gold
Magnesium
उत्तर
Sodium
Explanation -
Metals are generally hard. This means that most of the metals cannot be cut easily. But sodium metal is soft and can be easily cut with a knife.
APPEARS IN
संबंधित प्रश्न
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium.
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
Write the equation for the reaction of Zinc with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
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
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
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
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
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
