Reactivity of Different Metals with Water

Q.

What happens when potassium reacts with :

(a) water

Q. Which of the following metals floats in its reactions with cold water?

1. Calcium (Ca)
2. Gold (Au)
3. Iron (Fe)
4. Zinc (Zn)

Q.

Why non metal do not react with water

Q.

Which gas is evolved when sodium metal reacts with water?

1. Nitrogen

2. Hydrogen

3. Carbon-dioxide

4. Oxygen

Q.

Which metal is added to steel to make stainless steel?

Q.

Which of the following metals float after reacting with cold water?

1. Gold (Au)

2. Zinc (Zn)

3. Iron (Fe)

4. Calcium (Ca)

Q.

Name a lustrous non-metal.

Q.

Give the composition of the alloy used to make decorative articles.

Q.

Iron(II) sulhide shows only one kind of particles that are __________ in colour (grey-black/ yellow)

Q.

………….. is a metal which is liquid at room temperature.

Q.

State two physical properties on the basis of which metals can be distinguished from the nonmetals.

Q. Name a metal for each case:
(a) It does react with cold as well as hot water but reacts with steam.
(b) It does not react with any physical state of water.

Q. Certain metals would not evolve hydrogen gas with HNO3. Give reason.

Q.

Choose the correct option from the following:

1. Copper reacts with water to give Copper hydroxide.

2. Aluminium reacts with cold water to give Aluminium hydroxide.

3. Iron reacts with steam to give Iron hydroxide.

4. Magnesium reacts with normal water to give Magnesium oxide.

Q.

Which gas is formed when an amphoteric metal reacts with a strong base?

Q. When an element M and its oxide reacted with HCl following reactions were observed. Based on the given reactions and observation choose the incorrect statement regarding M, A, and X.
$M+HCl\left(aq\right)\to MC{l}_2\left(aq\right)+A_{2}M{O}_2\left(s\right)+HCl\left(aq\right)\to MC{l}_2\left(aq\right)+H_{2}O\left(l\right)+X_2\left(g\right)$
Observation: Matchstick starts to burn with a pop sound when brought near $A_2$ gas.

1. M is a metal, A and X are nonmetals.
2. M is Cu, A is H, X is Cl
3. M is above hydrogen in the reactivity series.
4. $X_2$ gas has a pungent choking odour.

Q. Statement I:- Hydrogen gas is not evolved when zinc reacts with cold water.

Statement II:- Sodium reacts vigorously with cold water to produce sodium hydroxide and hydrogen gas.

1. Only statement I is true.
2. Only statement II is true.
3. Both statements are true.
4. Both statements are false.

Q. A student was given few metals Mg, K, Fe and Cu. Which of them will react only with steam and not with cold or hot water to give $H_2$ gas?

1. K
2. Mg
3. Fe
4. Cu

Q.

Which of the following reacts vigorously with cold water?

1. Zinc (Zn)

2. Sodium (Na)

3. Calcium (Ca)

4. Aluminium (Al)

Q. Sodium and potassium react violently with cold water.

1. False
2. True