Advertisements
Advertisements
प्रश्न
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
Advertisements
उत्तर
(b) silver
Because silver lies below other metals in the reactivity series.
APPEARS IN
संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
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.
Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
Fill in the following blank with suitable word:
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ................. on the surface of aluminium.
Why is white phosphorus kept immersed under water?
Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.
What special name is given to substances like aluminium oxide.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with eater.
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
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
In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead?
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following.
An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reaction involved.
Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
Find the odd one out:
