9th Chemistry Unit 11 Hydrogen MCQs Sindh Board

 9th Grade Chemistry Chapter 11 Hydrogen Sindh Board MCQs Notes Online Chapter Wise Question Answers. Sindh Boards Chemistry Subject Notes For Exams Preparations Karachi, Jamshoro, Sindh Boards. Chemistry class Ninth sindh board notes Unit 11 Hydrogen Most Repeated Multiple Choice Questions With Answers. Chemistry notes for class IX sindh board karachi Boards.

9th Chemistry MCQs Notes

Q.1: Select all those things which result when sodium metal is placed in a beaker of water:?

1. Water becomes acidic
2. Sodium disappears after sometime
3. H₂ and NaOH
4. No action

C

Q.2: Hydrogen is a diatomic molecule with bond energy:?

1. 100 K.J / mol
2. 104 K.Cal \ mol
3. 150 K.Cal / mol
4. 200 KJ / mol

B

Q.3: Deuterium is present in natural hydrogen in the ratio?

1. 10050000
2. 115000
3. 1.0
4. 11200

B

Q.4: A human being consumes water about --------- everyday.?

1. 2 litres
2. 10 litres
3. 1 litre
4. 5 litres

A

Q.5: Polluted water is -------- for drinking purposes.?

1. unfit
2. used
3. useful
4. fit

A

Q.6: MoI. mass of heavy water is:?

1. 18 a.m.u
2. 20 a.m.u
3. 16 a.m.u
4. 22 a.m.u

B

Q.7: The maximum density of water at 4^oC is:?

1. 1.0g\cm³
2. 1.2g/dm³
3. 0.998g/cm³
4. 0.918g/cm³

A

Q.8: The freezing point of heavy water is?

1. 4^oC
2. 1^oC
3. 0^oC
4. 3.81^oC

D

Q.9: Cavendish in 766 discovered.?

1. Hydrogen
2. Helium
3. Oxygen
4. Nitrogen

A

Q.10: Sun and other stars are largely composed of:?

1. Nitrogen
2. Oxygen
3. Hydrogen
4. Helium

C

Q.11: In the earth crust hydrogen is the ---------- most abundant element:?

1. 9^th
2. 8^th
3. 7^th
4. 10^th

A

Q.12: Water gas is a mixture of hydrogen H₂ and?

1. SO₂
2. Cl₂
3. CO₂
4. CO

D

Q.13: During the reaction of natural gas and steam the catalyst used is?

1. Cr
2. Zn
3. Fe
4. Ni

D

Q.14: Hydrogen has ---------- isotopes?

1. 4
2. 2
3. 3
4. 5

A

Q.15: The number of electron hydrogen contains in its K shell is?

1. 4
2. 2
3. 1
4. 3

C

Q.16: Smallest element by size is?

1. Nitrogen
2. Oxygen
3. Helium
4. Hydrogen

D

Q.17: Gas filled in weather balloon is?

1. Hydrogen
2. Ammonia
3. Nitrogen
4. Oxygen

A

Q.18: Carbon black and H₂ are formed when ---------- is decomposed thermally above 700^oC.?

1. OC
2. CH₂ = CH₂
3. CO₂
4. CH₄

C

Q.19: In sodium hydride NaH oxidation sate of hydrogen is?

1. 1
2. 1
3. 2
4. 2

A

Q.20: Atomic hydrogen is called?

1. Tritium
2. Deutrium
3. Protium
4. Nascent hydrogen

D