Hydrogen

Q. Zinc on reaction with hydrochloric acid produces gas.

1. nitrogen
2. chlorine
3. hydrogen

Q. The most abundant element present in the universe is.

1. nitrogen
2. hydrogen
3. oxygen

Q.

What is pop sound test?

Q. Hydrogen is the most abundant element in the universe.

1. True
2. False

Q.

What happens to the number of valence electrons when we move down the group?

Q.

What is the relation between the valency of an element and the number of valence electrons in its atoms? Explain.

Q.

The atomic number of hydrogen is 1 and that of helium is 2. Why is hydrogen(a non-metal) placed in the first group and helium in the 18th group?

1. Hydrogen combines with alkali metals to form alkali hydrides

2. Both hydrogen and alkali metals have a single valence electron

3. Hydrogen is gaseous in nature

4. Hydrogen easily reacts with halogens

Q. What did Henry Cavendish name hydrogen when he first discovered it?

1. Inflammable air
2. Hydrogenes
3. Flammable air
4. Watergenes

Q.

What is the relationship between valency and valence electrons?

Q.

The name for hydrogen comes from the word meaning -

1. Fire forming

2. Water fearing

3. Water forming

4. Gas

Q.

Hydrogen is the most abundant element in nature.

1. True

2. False

Q.

How would you test for an alcohol?

Q. Arrange the metals in the decreasing order of their reactivity with acids.

1. Magnesium
2. Aluminium
3. Iron
4. Copper
5. Gold

Q. Protium is the least abundant isotope of hydrogen found.

1. True
2. False

Q. Which among the following indicates the presence of hydrogen gas?

1. Purple flame
2. Pop sound
3. Explosion
4. Yellow flame

Q.

Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Why?

1. Zinc is above hydrogen whereas Copper is below hydrogen in the activity series of metals.

2. Copper is above hydrogen whereas Zinc is below hydrogen in the activity series of metals.

3. There is no recaction when zinc is added to dilute hydrochloric acid.

4. None of the above

Q.

Hydrogen is the most abundant element on the earth

1. True
2. False

Q.

Why is granulated zinc and not the pure zinc used for the preparation of hydrogen gas in laboratory?

Q.

What does valence mean?

Q.

Hydrogen has _____ valence electrons.

1. two
2. four
3. one
4. three

Q.

Hydrogen in molecular forms exists as:-

1. Polyatomic

2. Diatomic

3. Triatomic

4. Tetra-atomic

Q.

Who gave hydrogen its name

Q.

Give reasons for the following.

Helium does not react with other elements.

Q.

Why The Hot Primitive Sea Rich In Chemicals Was Called Primitive Soup?

Q.

How is hydrogen obtained from

i) dilute sulphuric acid

ii) sodium hydroxide

iii) water?

Q.

State whether the following statements are true or false, if false then write the correct form of a statement.

Hydrogen is not used for the manufacture of chemicals.

1. True
2. False

Q. Zinc reacts with hydrochloric acid to give chlorine gas.

1. True
2. False

Q.

How will you prove that water is a compound

Q.

Name a metal which does not displace Hydrogen from dilute acid solutions.

Q.

I want one word or multiple choice questions for the lesson Hydrogen