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1st Year Chemistry Chapter 12 Test

1st Year · Chemistry · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

Which halogen has greenish yellow colour?
1. $F_2$
2. $Cl_2$
3. $Br_2$
4. $I_2$
The thermal stability of hydrogen halides decreases in the order:
1. HI > HBr > HCl > HF
2. HF > HCl > HBr > HI
3. HCl > HF > HBr > HI
4. HI > HCl > HBr > HF
When NaCl reacts with concentrated H₂SO₄, the gas evolved is:
1. HF
2. HCl
3. HBr
4. HI
Which halide ion has the strongest reducing power?
1. F⁻
2. Cl⁻
3. Br⁻
4. I⁻
Fluorine reacts with hydrogen:
1. Only in sunlight
2. At room temperature
3. Explosively even in dark and cold
4. Only at high temperature
Which of the following halogens is a reddish-brown liquid at room temperature?
1. Fluorine
2. Chlorine
3. Bromine
4. Iodine
Which of the following halogens has the highest oxidizing power?
1. Cl₂
2. Br₂
3. F₂
4. I₂
Chlorine reacts with cold and dilute NaOH to form:
1. NaCl and NaClO
2. NaClO₃
3. NaBr
4. Na₂SO₄
The order of decreasing reactivity of halogens is:
1. F₂ > Cl₂ > Br₂ > I₂
2. I₂ > Br₂ > Cl₂ > F₂
3. Cl₂ > F₂ > I₂ > Br₂
4. Br₂ > I₂ > F₂ > Cl₂
Which of the following is a strongest reducing agent?
1. F-
2. Br-
3. Cl-
4. I-

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

Which hydrogen halide is the strongest acid and why?
What are halogens?
Define reducing power of halide ions.
Why do halogens become less volatile down the group?
Write the reaction of chlorine with hot and concentrated NaOH solution.
Write the physical states and colors of fluorine, chlorine, bromine, and iodine.
What is the order of reactivity of halogens with hydrogen?
Arrange the halogens in order of decreasing bond energy.